Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 571.95
Core: 49 Top of Core Depth (m) : 570.50
Sect: 1 Top of Section Depth(m): 570.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-7), 2 (8-13), 3A (15-28), 3B (28-42),
3C (43-50), 3D (50-60), 3E (60-70), 4 (73-88),
5 (90-95), 6A (95-105), 6B (105-120), 6C (120-131),
6D (132-137), 6E (139-144);
Texture : PLAG-OL PHYRIC, RELATIVELY FRESH GLASS SELVAGES AT
17+94+97+143CM MARK THE BOUNDARY OF THE COOLING
UNITS, FINE-GRAINED TO GLASSY GNDMASS;
Structure : PILLOW BASALT, INFREQUENT CALCITE + SMEC +/- OPAL
+/- PYRITE VEINS ARE PRESENT THROUGHOUT SECTION;
Alteration : MOD
ALL PCES EXCEPT PCE 1+5 AND THE BOTTOM OF PCES
3B+4;
EXT
PCES 1+5 AND BOTTOM OF PCES 3B+4;
Comments : THIS SEQUENCE CONSISTS OF THE BOTTOM OF A COOLING
UNIT PCES 1+2, TWO COMPLETE COOLING UNITS FROM
PCES 3-5 AND FROM PCES 6A-E, WHOLE SECTION IS
HOMOGENEOUS, BASALT IS MEDIUM TO DARK GRAY;
Groundmass : SULFIDES ( <1%)
FINE-GRAINED TO GLASSY GROUNDMASS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): .5-4
PLAG PHENOS ARE RELATIVELY FRESH AND CONTAIN
NUMEROUS INCLUSIONS AND OCCASIONALLY REACH 1CM IN
DIAMETER;
OLIVINE ( 2-3%)
Size(mm): .1-1
OL PHENOS MOSTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
OL PHENOS;
SMECTITE
IN VEINS;
SULFIDES
IN VEINS AND IN GROUNDMASS;
CALCITE
IN VEINS;
OPAL
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 573.47
Core: 49 Top of Core Depth (m) : 570.50
Sect: 2 Top of Section Depth(m): 572.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-10), 1B (10-24), 1C (24-33), 2 (36-38),
3 (41-44), 4A (47-55), 4B (55-61), 5 (63-74),
6 (77-80), 7 (83-85), 8A (88-97), 8B (97-103),
8C (103-113), 8D (113-120), 9 (124-126),
10A (132-139), 10B (139-146);
Texture : PLAG-OL PHYRIC, GNDMASS IS FROM FINE-GRAINED TO
GLASSY, FRESH GLASSY MARGINS OCCUR IN PCES 1A+2+3
AND ALSO IN PCE 8A;
Structure : PILLOW BASALT, VEINLETS FILLED WITH CALCITE AND
SMEC WITH SOME MINOR PYRITE;
Alteration : SLIGHTLY;
Comments : BASALT IS MEDIUM TO DARK GRAY;
Groundmass : PLAGIOCLASE
PLAG IS VISIBLE IN FINE-GRAINED GNDMASS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 4-5
PHENOS ARE FRESH AND UP TO 1CM IN SIZE;
OLIVINE ( 2%)
Size(mm): 2
PHENOS MOSTLY ALTERED TO SMEC BUT SOME ARE FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS;
SMECTITE
IN VEINLETS;
CALCITE
IN VEINLETS;
PYRITE
IN VEINLETS;
Leg : 53 Top/Bottom Interval(mm): 0/ 300 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 573.80
Core: 49 Top of Core Depth (m) : 570.50
Sect: 3 Top of Section Depth(m): 573.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (4-14), 1B (14-22), 2 (25-29);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS;
Structure : PILLOW BASALT, VEINLETS OF CALCITE AND SMEC;
Alteration : MOD;
Comments : MEDIUM TO DARK GRAY BASALT, PCE 2 IS FROM THE CORE
CATCHER;
Groundmass : PYRITE ( <1%)
FROM FINE-GRAINED TO GLASSY GNDMASS MAY ALSO BE
SOMEWHAT OXIDIZED TO GOETHITE (?);
GRAIN SIZE DECREASES DOWNWARD IN THIS SECTION;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 5-8
PLAG PHENOS ARE GENERALLY FRESH;
OLIVINE ( 2%)
Size(mm): <1
COMPLETELY ALTERED TO SMEC;
Replacement: CALCITE
FOUND IN VEINLETS;
SMECTITE
Minerals Replaced: OL
REPLACING OL PHENOS AND ALSO FOUND IN VEINLETS;
GOETHITE
ID UNCERTAIN BUT MAY BE PRESENT AS A RESULT OF
OXIDATION OF MINERALS IN GNDMASS;
PYRITE
IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 300/ 400 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 573.90
Core: 49 Top of Core Depth (m) : 570.50
Sect: 3 Top of Section Depth(m): 573.80
LITHOLOGY: TOTALLY ALTERED PILLOW MARGIN;
BRECCIATED PARTIALLY;
Piece No. : PCE 3 (33-37);
Texture : VERY FINE-GRAINED PARTIALLY BRECCIATED INTERPRETED
TO HAVE BEEN A GLASSY PILLOW MARGIN;
Alteration : ALMOST COMPLETELY ALTERED;
Comments : PCE IS FROM CORE CATCHER;
Replacement: CALCITE
CLAY
DARK GREEN CLAY POSSIBLY SMEC;
Leg : 53 Top/Bottom Interval(mm): 0/ 70 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 573.57
Core: 50 Top of Core Depth (m) : 573.50
Sect: 1 Top of Section Depth(m): 573.50
LITHOLOGY: SEDIMENT;
ALMOST COMPLETELY ALTERED BASALT;
Comments : SMALL PCES OF CALCITE + SMEC;
Replacement: CALCITE
SMECTITE
Leg : 53 Top/Bottom Interval(mm): 70/1500 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 575.00
Core: 50 Top of Core Depth (m) : 573.50
Sect: 1 Top of Section Depth(m): 573.57
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (7-14), 2A (16-35), 2B (35-43), 2C (42-51),
2D (49-56), 3A (58-68), 3B (68-75), 4A (77-80),
4B (82-85), 5 (87-95), 6 (97-104), 7 (107-115),
8A (117-127), 8B (129-134), 9 (136-143),
10 (145-150);
Texture : PLAG-OL PHYRIC, GNDMASS HAS COARSER-GRAINED
REGIONS WHICH EXHIBIT SUBOPHITIC TEXTURE, FOUR FRESH
GLASS ZONES ARE PRESENT AT 37+50+100+140CM;
GNDMASS IS MOSTLY FINE-GRAINED AND GLASSY;
Structure : PILLOW BASALT, VEINLETS ARE FILLED WITH CALCITE AND
SMEC AND SOME PYRITE;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 0
VESICLES NOT EVIDENT IN HAND SPECIMEN;
Groundmass : PYRITE
PYRITE IS DISSEMINATED IN THE GNDMASS;
GNDMASS IS MOSTLY FINE-GRAINED TO GLASSY EXCEPT
IN REGIONS THAT ARE MEDIUM-GRAINED AND SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): .5-6
PHENOS ARE SERIATE AND GENERALLY FRESH CONTAINING
NUMEROUS INCLUSIONS AND SOME PYRITE AROUND PHENOS;
OLIVINE ( 4%)
Size(mm): .3-2
PARTLY ALTERED TO SMEC;
Replacement: CALCITE
IN VEINLETS;
SMECTITE
Minerals Replaced: OL
PARTLY REPLACES OL AND ALSO FOUND IN VEINLETS;
PYRITE
IN GNDMASS AND APPEARS TO BE INCLUDED AROUND
PLAG PHENOS;
Leg : 53 Top/Bottom Interval(mm): 0/1430 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 576.43
Core: 50 Top of Core Depth (m) : 573.50
Sect: 2 Top of Section Depth(m): 575.00
LITHOLOGY: PLAG-OL MODERATELY TO PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-12), 1B (13-24), 1C (25-33), 2 (38-39),
3A (44-53), 3B (53-61), 4 (65-73), 5 (76-89),
6A (92-101), 6B (102-111), 6C (112-120),
7A (123-133), 7B (133-141);
Texture : PLAG-OL MODERATELY PHYRIC TO PHYRIC, FINE-GRAINED
GNDMASS EXCEPT IN PCES 1A+1B+2C SHOWING A
VARIATION BECOMING VERY FINE-GRAINED, GLASSY MARGINS
ARE PRESENT IN PCES 1A+1B+1C+4+5+6A+6B+7A, VERY
FINE-GRAINED ZONE IN CENTER OF PCE 3B WHICH LOOKS
LIKE A QUENCH ZONE;
Structure : PILLOW BASALT, VEINLETS FILLED WITH CALCITE AND
SMEC ARE COMMON THROUGHOUT;
Alteration : MOD;
ALTERATION OCCURS MOSTLY IN THE VEINS;
Comments : MEDIUM TO DARK GRAY;
Groundmass : GENERALLY FINE-GRAINED BUT PCES 1A+1B+1C SHOW
VARIATION IN GRAIN SIZE BECOMING VERY FINE;
Phenocrysts: PLAGIOCLASE ( 7-8%)
Size(mm): 6
PHENOS ARE FRESH AND UP TO 6MM IN SIZE ALSO LESS
ABUNDANT IN PCE 1 THAN IN THE REST OF THE SECTION;
PLAGIOCLASE (10-12%)
Size(mm): 6
FRESH PHENOS UP TO 6MM IN SIZE PCES 2-7B;
OLIVINE ( 1-2%)
Size(mm): 2
PHENOS ARE SOMETIMES FRESH;
PHENOCRYST CONCENTRATION IN PCE 1B;
Replacement: CALCITE
IN VEINS;
SMECTITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 578.00
Core: 50 Top of Core Depth (m) : 573.50
Sect: 3 Top of Section Depth(m): 576.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-19), 1B (20-35), 1C (36-41), 2A (45-53),
2B (48-62), 2C (63-70), 2D (70-84), 2E (85-95),
2F (95-111), 2G (112-126), 2H (127-142),
2I (143-146);
Texture : PLAG-OL PHYRIC, GLASS ZONE AT 44CM IS DEVITRIFIED
(?) OR PARTIALLY ALTERED (?), GNDMASS IS
FINE-GRAINED TO GLASSY AND THE GLASS SELVAGES ARE
ALTERED TO SMEC;
Structure : PILLOW BASALT, VEINLETS SCATTERED THROUGHOUT ARE
FILLED WITH CALCITE AND SMEC WITH SOME RARE PYRITE;
Alteration : MOD;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : PLAGIOCLASE
SOME PLAG NEEDLES IN COARSER REGIONS OF
GNDMASS;
PYRITE
TRACE PYRITE;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <10
PLAG PHENOS ARE MOSTLY FRESH AND SERIATE
CONTAINING SOME INCLUSIONS AND SOME TRACE PYRITE;
OLIVINE ( 1-5%)
Size(mm): .3-1
LARGEST CONCENTRATION IS FOUND FROM 0-10CM WITH
5% PHENOS DECREASING IN ABUNDANCE TO 1% AT THE
BASE OF PCE 1 AT 42CM AND BELOW 44CM OL PHENOS
ARE EVENLY DISTRIBUTED AT AROUND 2% OL PHENOS ARE
PARTIALLY TO COMPLETELY ALTERED TO SMEC;
Replacement: CALCITE
IN VEINLETS;
SMECTITE
Minerals Replaced: OL
REPLACING OL PHENOS AND ALSO IN VEINLETS;
PYRITE
IN VEINLETS AND GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Johnson,Paul
Hole: 418A Sample Midpoint (m) : 579.50
Core: 50 Top of Core Depth (m) : 573.50
Sect: 4 Top of Section Depth(m): 578.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-9), 2 (13-22), 3 (26-29), 4A (33-49),
4B (49-54), 5 (57-61), 7 (75-81), 8A (84-96),
8B (96-107), 9 (111-123), 10A (126-131),
10B (132-135), 10C (135-148);
Texture : PLAG-OL PHYRIC BASALT, GNDMASS IS FINE-GRAINED TO
GLASSY, GLASSY MARGINS IN PCES 2+4A+5+7 ARE FRESH
BUT SOME ARE PARTLY ALTERED TO SMEC AND CALCITE;
Structure : CONCENTRATIONS OF SECONDARY MINERALS OCCUR IN VEINS
ESPECIALLY IMPORTANT IN PCE 8 AT 95-96CM AND
103-107CM IN PCE 9 AT 110CM AND 120-122CM IN PCE 10
AT 123-125CM AND 129-132CM THEY ARE FILLED WITH
CALCITE (OFTEN IN RADIATE AGGREGATES) AND A LIGHT
BROWN OR GREEN SOAPY MINERAL (MONT ?) AND SMEC;
Alteration : SLIGHTLY;
AN AGGREGATE OF CALCITE AND GREEN SMEC PROBABLY
ALTERED FROM GLASS;
Comments : PYRITE NODULE 8MM LONG IN PCE 10A, MEDIUM TO DARK
GRAY BASALT;
Groundmass : GNDMASS IS FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <6
FRESH PLAG UP TO 6MM IN SIZE;
OLIVINE ( 2-3%)
Size(mm): <3
SOMETIMES FRESH OL UP TO 3MM IN SIZE AND MOSTLY
ALTERED TO SMEC;
Replacement: CALCITE
IN VEINS AND IN PCE 6 AND IN THE GLASSY MARGINS;
SMECTITE
Minerals Replaced: OL
REPLACING OL PHENOS ALSO IN VEINS AND IN PCE 6 AND
IN THE GLASSY MARGINS;
MONTMORILLONITE
ID UNCERTAIN BUT IF PRESENT IT IS FOUND IN VEINS;
PYRITE
IN PCE 10A A PYRITE NODULE 8MM IS PRESENT;
Leg : 53 Top/Bottom Interval(mm): 0/1300 Analyst: Johnson,Paul
Hole: 418A Sample Midpoint (m) : 580.80
Core: 50 Top of Core Depth (m) : 573.50
Sect: 5 Top of Section Depth(m): 579.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (3-15), 1B (16-20), 1C (21-29), 2 (32-42),
3A (47-51), 3B (52-60), 4A (63-65), 4B (66-74),
4C (74-83), 5 (86-92), 6A (95-105), 6B (105-114),
6C (114-123), 6D (123-127), 6E (127-129);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
FRESH GLASSY MARGINS IN PCES 1B+1C+4B+4C+5;
Structure : VEINS ARE FILLED WITH CALCITE AND SMEC AND MINOR
PYRITE;
Alteration : MOD;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE
Groundmass : FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 8-12%)
Size(mm): 4-5
PLAG PHENOS ARE GENERALLY 4-5MM BUT OCCUR UP TO
10MM IN SIZE ALSO A LARGE PHENO OF PLAG IN PCE 2
ROUNDED AND 15MM IN SIZE ALL ARE FRESH;
OLIVINE ( 2%)
Size(mm): TO 2
OL PHENOS ARE PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL AND ALSO IN VEINS;
CALCITE
IN VEINS AND IN VESICLES;
PYRITE
MINOR PYRITE IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Strong, D.F.
Hole: 418A Sample Midpoint (m) : 584.30
Core: 51 Top of Core Depth (m) : 582.90
Sect: 1 Top of Section Depth(m): 582.90
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-6), 1B (3-7), 1C (6-13), 2 (15-20),
3A (21-31), 3B (31-40), 4A (43-56), 4B (56-64),
5 (67-74), 6 (76-79), 7 (82-85), 8 (87-93),
9 (96-103), 10A (105-116), 10B (117-123),
11 (124-130), 12 (133-138);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASS IS FRESH EXCEPT IN TWO MAJOR ALTERED ZONES IN
PCES 3A+3B AND PCE 12 WHERE THE GLASS ON THE PILLOW
RIMS IS PALAGONITIZED WITH SPALLED OFF CALCITE XTLS
BETWEEN THE GLASS PARTICLES, PILLOW RIMS IN PCE 3B
ARE HIGHLY ALTERED HYDROTHERMALS (?);
Structure : SMEC VEINS UP TO 8MM THICK IN PCE 3A;
Alteration : MOD;
Comments : GRAY TO GREENISH-GRAY BASALT;
Groundmass : PLAGIOCLASE
MICROPHENOS OF PLAG;
GENERALLY FINE-GRAINED BUT SOMETIMES GLASSY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): 4
PHENOS OFTEN FORM CLUSTERS;
OLIVINE ( 2-5%)
Size(mm): 2
PHENOS GENERALLY FRESH SOME ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL PHENOS AND IN VEINS;
CALCITE
XTLS IN THE PILLOW RIMS;
PALAGONITE
FROM ALTERATION OF GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 585.90
Core: 51 Top of Core Depth (m) : 582.90
Sect: 2 Top of Section Depth(m): 584.40
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-29), 1B (29-44), 2 (47-56), 3 (60-67),
4A (70-80), 4B (76-82), 4C (82-93), 4D (92-112),
5A (114-123), 5B (123-129), 6A (131-137),
6B (137-147);
Texture : PLAG-OL-CPX PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS AND IS WELL-CRYSTALLIZED, GLASSY
MARGINS IN PCES 1A+1B+3+4+6A+6B WITH BADLY ALTERED
ZONES CONVERTED TO SMEC IN PCES 3+6A+6B WITH
SOME CALCITE AND OPAL ALSO POSSIBLY SEDIMENT BETWEEN
PILLOWS;
Structure : CRACKS AND THIN VEINS FILLED WITH CALCITE AND
SMEC ARE ABUNDANT SOME VEINS HAVE PYRITE;
Alteration : MOD;
ALL PCES EXCEPT 3+6A+6B;
EXT
PCES 3+6A+6B;
SMEC IS COLORLESS AND PALE BROWN;
Comments : GRAY TO GREENISH GRAY BASALT;
Vesicles : Size(mm): Percent: 0
NO VESICLES PRESENT;
Groundmass : PYRITE
RARE FINE GRAINS;
FINE-GRAINED AND WELL XTLIZED;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): 8
PHENOS ARE FRESH UP TO 8MM IN SIZE;
OLIVINE ( 3%)
Size(mm): 3-4
EUHEDRAL PHENOS PARTIALLY ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1
ROUNDED AND FRESH PHENOS;
Replacement: PYRITE
IN GNDMASS AND IN VEINS;
CALCITE
IN CRACKS AND VEINS;
SMECTITE
Minerals Replaced: OL
REPLACES SOME OL PHENOS AND ALSO REPLACES SOME OF
GLASSY MARGINS AND IN CRACKS AND VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 587.40
Core: 51 Top of Core Depth (m) : 582.90
Sect: 3 Top of Section Depth(m): 585.90
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (0-3), 2A (5-15), 2B (16-20), 2C (21-33),
2D (29-36), 2E (40-54), 3A (57-68), 3B (68-74),
4 (76-85), 5A (87-91), 5B (89-100), 6A (104-120),
6B (120-137), 6C (139-149);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS IS FINE-GRAINED TO
GLASSY, GLASS SELVAGES ARE GENERALLY FRESH WITH
MINOR ALTERATION TO PALAGONITE AND ALSO SMEC IN
PCE 2A, PILLOW BASALT;
Structure : VEINLETS FILLED WITH SMEC AND CALCITE;
Alteration : SLIGHTLY
ALL PCES EXCEPT 1 AND TOP OF PCE 2A AND BOTTOM OF
PCE 6C;
EXT
PCE 1 AND TOP OF PCE 2A AND BOTTOM OF PCE 6C;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8-15%)
Size(mm): <8
FRESH PHENOS UP TO 8MM IN SIZE;
OLIVINE ( 2-4%)
Size(mm): <1.5
OL IS ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1.5
ROUNDED AND FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL AND GLASSY ALSO FOUND IN VEINLETS;
CALCITE
IN VEINLETS;
PALAGONITE
REPLACES GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 588.90
Core: 51 Top of Core Depth (m) : 582.90
Sect: 4 Top of Section Depth(m): 587.40
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-12), 1B (13-18), 2 (20-24), 3A (26-32),
3B (33-51), 3C (51-72), 4 (74-86), 5A (88-97),
5B (97-107), 5C (107-115), 6A (118-125),
6B (123-131), 6C (131-140), 7 (142-148);
Texture : PLAG-OL PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS IN PCES 2+3A AND
IN PCES 3B+4+5+6B+6C+7 AND THE GLASS IS ALTERED TO
SMEC IN ALL EXCEPT PCE 5 IS FRESH;
Structure : VEINS UP TO 3MM WIDE FILLED WITH CALCITE AND
SMEC, VERY THICK VEINS RUN PERPENDICULAR TO THE
GLASSY MARGINS, SOME VEINS HAVE PYRITE;
Alteration : SLIGHTLY;
Comments : GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): Percent: 0
NO VESICLES PRESENT;
Groundmass : PYRITE
PYRITE IS DISSEMINATED IN GNDMASS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <8
FRESH PHENOS;
OLIVINE ( 3-4%)
Size(mm): <3
OL PHENOS ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL AND GLASSY MARGINS ALSO FOUND IN
VEINS;
CALCITE
FOUND IN VEINS;
PYRITE
IN VEINS AND IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 590.40
Core: 51 Top of Core Depth (m) : 582.90
Sect: 5 Top of Section Depth(m): 588.90
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-13), 2 (16-26), 3A (28-44), 3B (44-53),
3C (53-60), 4 (63-69), 5 (71-78), 6 (81-89),
7 (91-106), 8 (109-119);
Texture : PLAG-OL PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS IN PCES 1+3B+3C+4
AND THE GLASS IS MOSTLY ALTERED TO SMEC WITH
MINOR PYRITE, GLASSY MARGIN IN PCE 4 IS BRECCIATED;
Structure : INSIDE GLASSY MARGIN OF PCE 4 IS A THIN VEIN WITH
DOLOMITE (?) AND MAGNETITE (?), CRACKS AND VEINS
UP TO 3MM WIDE ARE FILLED WITH CALCITE AND DARK
GREEN SMEC;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : MAGNETITE
ID UNCERTAIN MAY BE IN VEIN OF PCE 4 AND IT HAS A
REFRACTIVE INDEX ALONG ALPHA AXIS EQUAL TO 1.553
+/- 0.003;
FINE-GRAINED TO GLASSY GNDMASS;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <7
FRESH;
OLIVINE ( 3-4%)
Size(mm): <3
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL AND GLASSY MARGINS ALSO FOUND IN
VEINS;
CALCITE
IN VEINS;
DOLOMITE
ID UNCERTAIN MAY BE PRESENT IN VEIN IN PCE 4;
Leg : 53 Top/Bottom Interval(mm): 0/ 50 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 592.25
Core: 52 Top of Core Depth (m) : 592.20
Sect: 1 Top of Section Depth(m): 592.20
LITHOLOGY: SEDIMENT;
CHERT;
Piece No. : PCE 1 (2-5);
Leg : 53 Top/Bottom Interval(mm): 50/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 593.70
Core: 52 Top of Core Depth (m) : 592.20
Sect: 1 Top of Section Depth(m): 592.25
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 2 (7-15), 3 (17-24), 4 (27-35), 5 (38-46),
6A (50-60), 6B (60-69), 6C (69-77), 7 (80-88),
8 (90-96), 9 (97-103), 10A (105-120), 10B (120-133),
10C (133-149);
Texture : PLAG-OL PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY, GLASSY MARGINS ARE BADLY ALTERED AND SMEC +
CALCITE REPLACING GLASS IN PCES 2-6C, GLASSY MARGIN
IS FRESH IN PCE 8, GLASSY MARGINS OF PCES 2-5 HAS
PINK MORDENITE (?);
Structure : VEINS ABUNDANT WITH CALCITE AND SMEC WITH MINOR
PYRITE;
Alteration : MOD;
Comments : GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE
VESICLES ARE RARE;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <10
FRESH PHENOS;
OLIVINE ( 5%)
Size(mm): <4
EUHEDRAL PHENOS ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL PHENOS AND GLASSY MARGINS ALSO FOUND
IN VEINS AND IN VESICLES;
CALCITE
IN VEINS AND VESICLES ALSO REPLACING GLASS;
PYRITE
IN VEINS;
MORDENITE
IN CEMENT OF GLASSY MARGINS PCES 2-5 AND IS PINK;
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 595.16
Core: 52 Top of Core Depth (m) : 592.20
Sect: 2 Top of Section Depth(m): 593.70
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-10), 2A (11-21), 2B (21-29), 2C (29-32),
3 (35-42), 4 (44-55), 5A (57-67), 5B (66-73),
6A (75-94), 6B (94-109), 6C (109-118), 7 (121-129),
8 (132-142);
Texture : PLAG-OL PHYRIC BASALT, PILLOW BASALT, GLASSY MARGINS
IN PCES 1+2A+3+5B+6A PARTLY ALTERED TO SMEC,
FINE-GRAINED TO GLASSY GNDMASS;
Structure : VEINS FILLED WITH SMEC AND CARBONATE WITH MINOR
PYRITE;
Alteration : MOD;
Comments : GRAY TO GREENISH-GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY AND MODERATELY ALTERED;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <7
FRESH PHENOS;
OLIVINE ( 4%)
Size(mm): <4
COMPLETELY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL AND GLASSY MARGINS ALSO FOUND IN
VEINS;
CARBONATE
IN VEINS;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1370 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 596.57
Core: 52 Top of Core Depth (m) : 592.20
Sect: 3 Top of Section Depth(m): 595.20
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-10), 2 (12-20), 3 (23-27), 4 (30-40),
5 (42-50), 6A (53-65), 6B (65-83), 7 (86-93),
8 (95-105), 9 (107-121), 10 (124-135);
Texture : PLAG-OL-CPX PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS IN PCES 2+4+5+6+7
AND IN PCES 8+9 MOSTLY ALL OF THE MARGINS ARE
ALTERED TO SMEC AND MINOR PINK MORDENITE;
Structure : SPARSE VEINS ARE FILLED WITH SMEC AND CARBONATE
WITH MINOR PYRITE;
Alteration : MOD;
Comments : GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CARB
Groundmass : FINE-GRAINED TO GLASSY WITH SMEC AND PYRITE
DISSEMINATED IN GNDMASS;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <8
PHENOS ARE FRESH;
OLIVINE ( 4%)
Size(mm): <3
EUHEDRAL XTLS ARE ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL AND GLASSY MARGINS ALSO IN VEINS AND
VESICLES AND IN GNDMASS;
CARBONATE
IN VESICLES AND VEINS;
MORDENITE
PINK XTLS OF MORDENITE ARE FOUND IN THE CEMENT OF
BRECCIATED GLASSY MARGINS;
PYRITE
IN VEINS AND IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 598.20
Core: 52 Top of Core Depth (m) : 592.20
Sect: 4 Top of Section Depth(m): 596.70
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (1-3), 1B (4-17), 2 (20-40), 3 (40-45),
4 (41-65), 5 (66-73), 6A (75-95), 6B (95-105),
6C (105-111), 6D (112-117), 7 (120-125),
8 (128-146);
Texture : PLAG-OL-CPX PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS IN PCES 1A+1B+3+4
AND IN PCES 5+6A+8 AND ALL MARGINS ARE PARTIALLY
ALTERED TO SMEC;
Structure : VEINS ARE COMMON THROUGHOUT AND FILLED WITH SMEC AND
CALCITE AND MINOR PYRITE;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8-15%)
Size(mm): <4
FRESH PHENOS;
OLIVINE ( 4%)
Size(mm): <4
PARTLY ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL PHENOS AND GLASSY MARGINS ALSO FOUND
IN VEINS;
CALCITE
IN VEINS;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 599.70
Core: 52 Top of Core Depth (m) : 592.20
Sect: 5 Top of Section Depth(m): 598.20
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (0-14), 2A (15-26), 2B (26-36), 3 (37-50),
4 (52-59), 5 (60-71), 6 (73-88), 7 (90-95),
8A (96-115), 8B (115-137), 8C (137-149);
Texture : PLAG-OL-CPX PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, FRESH GLASS SELVAGES IN
PCES 2A+5+6+8A SOME GLASS IS PARTLY ALTERED TO
SMEC;
Structure : VEINS OCCUR THROUGHOUT SECTION AND ARE FILLED WITH
CARBONATE + SMEC + ZEOLITE (MORDENITE ?) AND
SOME MINOR PYRITE, THERE IS A THICK SMEC VEIN IN
TOP OF PCE 8B;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <4
PHENOS ARE FRESH AND OFTEN FORM GLOMEROCRYSTS;
OLIVINE ( 2%)
Size(mm): <2
PARTLY ALTERED TO SMEC WITH SOME FRESH GRAINS
ALSO FOUND GLOMEROCRYSTS;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL AND GLASS SELVAGES ALSO FOUND IN
VEINS;
CARBONATE
IN VEINS;
ZEOLITE
ID UNCERTAIN (MORDENITE ?) PRESENT IN VEINS;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1380 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 601.08
Core: 52 Top of Core Depth (m) : 592.20
Sect: 6 Top of Section Depth(m): 599.70
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-14), 2A (16-30), 2B (31-45), 2C (44-54),
2D (54-61), 2E (61-72), 3 (76-90), 4 (94-99),
5A (101-118), 5B (119-136);
Texture : PLAG-OL-CPX PHYRIC, PILLOW BASALT, GNDMASS IS
FINE-GRAINED TO GLASSY, GLASS SELVAGES ARE PARTLY
ALTERED TO SMEC, FRESH GLASS OCCURS IN PCE 2A
AND THE BASE OF PCE 2E AND THE TOP OF PCE 3;
Structure : VEINS ARE FILLED WITH SMEC + CARBONATE + ZEOLITE
(MORDENITE ?) AND MINOR PYRITE, COMPLETE PILLOW IS
FORMED BY PCES 2A-2E;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : PLAGIOCLASE
MICROPHENOS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8-15%)
Size(mm): <6
FRESH PHENOS THAT ARE EUHEDRAL AND SOMETIMES
ROUNDED;
OLIVINE ( 1-3%)
Size(mm): <1
PARTLY ALTERED TO SMEC MOSTLY ROUNDED XTLS;
CLINOPYROXENE ( 1%)
Size(mm): <1.5
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL AND GLASS SELVAGES ALSO FOUND IN
VEINS;
CARBONATE
IN VEINS;
ZEOLITE
ID UNCERTAIN (MORDENITE ?) PRESENT IN VEINS;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 602.60
Core: 52 Top of Core Depth (m) : 592.20
Sect: 7 Top of Section Depth(m): 601.20
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-18), 2 (21-39), 3 (42-51), 4 (55-73),
5 (75-90), 6 (93-100), 7 (104-109), 8 (111-121),
9 (123-130), 10 (134-136);
Texture : PLAG-OL-CPX PHYRIC, FINE-GRAINED TO GLASSY
GNDMASS, GLASS SELVAGES ARE MOSTLY ALTERED TO
SMEC AND ARE FOUND IN PCES 3+4+5+6;
Structure : VEINS ARE FILLED WITH CARBONATE + SMECTITE AND MINOR
PYRITE, PILLOW BASALT;
Alteration : MOD
PCES 1-6;
EXT
PCES 7-10;
Comments : GRAY TO GREENISH-GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
FRESH PHENOS;
OLIVINE ( 4%)
Size(mm): <3
MOSTLY ALTERED TO SMEC BUT FRESH OL PHENOS
OCCUR IN PCES 4+5, CRYSTALLOGRAPHIC INDEX GAMMA IS
EQUAL TO 1.706 +/- 0.03 AND APPROX. 15% FAYALITE
IS PRESENT;
CLINOPYROXENE ( 1-2%)
Size(mm): <1
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS SELVAGES ALSO FOUND
IN VEINS;
CALCITE
IN VEINS;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 603.10
Core: 53 Top of Core Depth (m) : 601.60
Sect: 1 Top of Section Depth(m): 601.60
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-10), 2 (12-17), 3 (20-22), 4 (25-33),
5 (35-37), 6 (41-44), 7A (47-64), 7B (64-87),
7C (88-95), 8 (100-102), 9 (105-119), 10 (122-147);
Texture : PLAG-OL-CPX PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS IN PCES 6+7A ARE
BRECCIATED AND ALTERED TO SMEC AND GLASSY MARGIN
AREAS OF PCES 7C+8+9+10 ARE FRESH;
Structure : VEINS ARE FILLED WITH GREEN SMEC + CALCITE
(95%) AND MINOR PYRITE SOME OF THE VEINS ARE UP TO
10MM THICK AND HAVE CAVITIES FILLED WITH XTLS,
PARTLY BRECCIATED BASALT PCES 1-4;
Alteration : MOD;
Comments : GRAY TO GREENISH-GRAY BASALT;
Groundmass : SMECTITE
REPLACEMENT OF GNDMASS BY SMEC;
PYRITE
OCCURS LOCALLY IN GNDMASS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8-12%)
Size(mm): <8
FRESH PHENOS;
OLIVINE ( 3%)
Size(mm): <5
MOSTLY ALTERED TO SMEC EXCEPT FRESH PHENOS
NEAR GLASSY MARGINS;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND IN GNDMASS ALSO FOUND IN
VEINS;
PYRITE
IN GNDMASS AND IN VEINS;
CALCITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 604.60
Core: 53 Top of Core Depth (m) : 601.60
Sect: 2 Top of Section Depth(m): 603.10
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-18), 2 (21-25), 3 (28-35), 4A (38-49),
4B (47-81), 4C (80-89), 5 (92-96), 6A (99-110),
6B (110-125), 6C (125-138), 7 (140-143),
8 (145-149);
Texture : PLAG-OL-CPX PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS IN PCES 2+3+4A
ARE SLIGHTLY ALTERED TO SMEC AND MARGINS IN PCES
5+6A ARE BADLY ALTERED TO SMEC;
Structure : THIN VEINS OF CARBONATE AND SMEC WITH PYRITE
XTLS THAT DEVELOP ALONG CRACKS AND VEINS;
Alteration : SLIGHTLY
ALL PCES EXCEPT THE TOP OF PCE 1 AND PCE 5 AND
PART OF PCE 6A;
MOD
PCES 1+5+6A;
Comments : MEDIUM GRAY TO GREENISH-GRAY BASALT;
Groundmass : SMECTITE
OCCURS LOCALLY IN GNDMASS;
PYRITE
OCCURS LOCALLY IN GNDMASS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <10
FRESH PHENOS;
OLIVINE ( 3-5%)
Size(mm): <3
PARTLY ALTERED TO SMEC WITH RARE FRESH PHENOS;
CLINOPYROXENE ( 1-2%)
Size(mm): <2.5
SUBOPHITIC TO ROUNDED FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS ALSO IN GNDMASS AND IN
VEINS;
CALCITE
IN VEINS;
PYRITE
IN VEINS AND IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 606.10
Core: 53 Top of Core Depth (m) : 601.60
Sect: 3 Top of Section Depth(m): 604.60
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-27), 1B (27-42), 1C (42-50), 1D (48-75),
1E (70-84), 1F (84-91), 1G (91-99), 2 (102-109),
3 (112-122), 4 (125-135), 5 (136-149);
Texture : PLAG-OL-CPX PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASSY MARGINS ARE MOSTLY ALTERED TO SMEC FOUND
ON THE TOP OF PCE 1A AND BOTTOM OF PCE 1G AND ON
PCE 5;
Structure : PILLOW BASALT, AN ENTIRE PILLOW IS MADE FROM
PCES 1A-1G, VEINS ARE FILLED WITH SMEC + CARB
AND ZEOLITE (?) AND MINOR PYRITE;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY WITH QUENCH TEXTURE EVEN
IN THE MIDDLE OF THE PILLOW FROM 1A-1G;
Phenocrysts: PLAGIOCLASE (12-15%)
Size(mm): <6
EUHEDRAL AND FRESH PHENOS OFTEN FORMING
GLOMEROCRYSTS;
OLIVINE ( 3-5%)
Size(mm): <2
PARTLY REPLACED BY SMEC AND CARBONATE AND
PHENOS ARE SOMETIMES ROUNDED AND OFTEN FORM
GLOMEROCRYSTS;
CLINOPYROXENE ( 1-2%)
Size(mm): <1
SUBOPHITIC AND FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL ALSO FOUND IN VEINS AND IN GLASSY
MARGINS;
CALCITE
Minerals Replaced: OL
REPLACES OL ALSO FOUND IN VEINS;
PYRITE
IN VEINS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 612.50
Core: 54 Top of Core Depth (m) : 611.00
Sect: 1 Top of Section Depth(m): 611.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-18), 2A (21-35), 2B (36-45), 4 (56-64),
5 (66-79), 6 (81-86), 7 (88-101), 8 (103-110),
9 (113-126), 10 (128-136), 11 (137-146);
Texture : PLAG-CPX-OL PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS PARTLY ALTERED TO
SMEC FOUND AT BEGINNING OF CORE;
Structure : A THICK VEIN OF COARSE XTLN CALCITE AND SMEC WITH
PYRITE ABUNDANT IN THE VEINS;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE,SMEC
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
FRESH PHENOS;
OLIVINE ( 3%)
Size(mm): <1
PARTLY ALTERED TO SMEC WITH SOME FRESH PHENOS
THROUGHOUT CORE;
CLINOPYROXENE ( 5%)
Size(mm): TO 1.5
SUBOPHITIC AND FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL AND ALSO FOUND IN GLASSY MARGINS AND
IN VEINS AND IN VESICLES;
CALCITE
IN VEINS AND IN VESICLES;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 612.50
Core: 54 Top of Core Depth (m) : 611.00
Sect: 1 Top of Section Depth(m): 611.00
LITHOLOGY: SEDIMENT;
CHALCEDONY;
Piece No. : PCE 3 (47-54);
Leg : 53 Top/Bottom Interval(mm): 0/1060 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 613.56
Core: 54 Top of Core Depth (m) : 611.00
Sect: 2 Top of Section Depth(m): 612.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1 (2-11), 2 (13-20), 3 (24-42), 4 (46-54),
5 (57-66), 6 (67-75), 7 (76-82), 8 (86-95),
9 (98-104);
Texture : PLAG-OL-CPX PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASSY MARGIN IN PCE 6 IS FRESH;
Structure : VEINLETS ARE FILLED WITH SMEC AND PYRITE;
Alteration : SLIGHTLY
ROCK IS RELATIVELY FRESH;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): <1.5 Percent: 1-2
Location: Filling: CALCITE,SMEC
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <3
FRESH PHENOS THAT FORM SUBOPHITIC CLOTS WITH CPX;
OLIVINE ( 5%)
Size(mm): <1
PARTLY ALTERED TO SMEC WITH FRESH PHENOS PRESENT
IN ALMOST EACH SPECIMEN;
CLINOPYROXENE ( 5%)
Size(mm): <.5
FRESH PHENOS THAT FORM SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL AND ALSO FOUND IN VEINS AND VESICLES;
CALCITE
IN VESICLES;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1360 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 621.76
Core: 55 Top of Core Depth (m) : 620.40
Sect: 1 Top of Section Depth(m): 620.40
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC TO PHYRIC BASALT;
MASSIVE PILLOW BASALT;
Piece No. : PCE 1 (3-7), 2A (10-31), 2B (32-52), 2C (52-62),
2D (56-100), 3 (103-111), 4 (118-136);
Texture : PLAG-OL-CPX MODERATELY PHYRIC TO PHYRIC, GNDMASS
IS FINE-GRAINED TO GLASSY, GLASSY MARGIN ON PCE 1
ONLY AND IT IS FRESH;
Structure : VEINLETS ARE FILLED WITH SMEC + CALCITE AND
PYRITE BLEBS 0.5MM NEAR SOME VEINLETS, MASSIVE
PILLOW BASALT;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY BASALT;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE
Groundmass : PLAGIOCLASE
PLAG NEEDLES DISTINGUISHABLE;
SULFIDE
IN TRACE AMOUNTS IN GNDMASS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <3
FRESH PHENOS;
OLIVINE ( 2-4%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL PHENOS ALSO IN VESICLES AND VEINS;
CARBONATE
IN VESICLES AND VEINS;
PYRITE
IN VEINS AND GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 623.40
Core: 55 Top of Core Depth (m) : 620.40
Sect: 2 Top of Section Depth(m): 621.90
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (3-16), 2 (19-23), 3A (26-37), 3B (38-47),
4A (50-72), 4B (73-79), 4C (80-100), 5A (104-116),
5B (117-125), 6A (129-139), 6B (140-147);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS IS
FINE-GRAINED WITH ONE GLASSY MARGIN ON PCE 4A AND
THE GLASS IS ALTERED TO SMEC;
Structure : LARGE VEIN IN PCE 5A UP TO 10MM LARGE, VEINS CONTAIN
CALCITE + SMEC AND MINOR PYRITE, BASALT FRAGMENTS
WITH BRECCIATED MARGINS IN A GLASSY CEMENT THAT HAS
BEEN ALTERED TO SMEC IN PCES 2+3A+3B;
Alteration : SLIGHTLY
ALL PCES EXCEPT 2+3A+3B;
MOD
PCES 2+3A+3B;
Comments : GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
RARE VESICLES;
Groundmass : FINE-GRAINED WITH ONE GLASSY MARGIN;
Phenocrysts: PLAGIOCLASE ( 2-5%)
Size(mm): <3
FRESH;
OLIVINE ( 3%)
Size(mm): <2
MOSTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS ALSO FOUND IN GLASSY MARGIN AND
IN GLASSY CEMENT OF BRECCIATED PCES 2+3A+3B AND
ALSO IN VEINS;
CALCITE
IN VESICLES;
PYRITE
IN VEINLETS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 624.90
Core: 55 Top of Core Depth (m) : 620.40
Sect: 3 Top of Section Depth(m): 623.40
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (3-18), 1B (18-25), 2 (27-36), 3 (39-45),
4A (48-62), 4B (64-75), 5 (78-83), 6A (86-92),
6B (90-100), 7 (103-116), 8 (119-130), 9 (134-138),
10 (141-150);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, PILLOW BASALT
FINE-GRAINED TO GLASSY GNDMASS, GLASS SELVAGES
ARE ALMOST COMPLETELY ALTERED TO SMEC, GLASS ZONES
ARE IN PCES 1B (22-24CM) + 2 (27-30CM) + 5 AT
80CM + 6A (90CM) + 7 (107CM) + 10 (141CM);
Structure : VEINS ARE FILLED WITH SMEC AND CALCITE WITH MINOR
PYRITE, SLICKENSIDES ARE PRESENT ON PCES 2+4A+4B;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Groundmass : PLAGIOCLASE
PLAG NEEDLES ARE VISIBLE IN COARSER REGIONS;
PYRITE
PYRITE IS DISSEMINATED IN GNDMASS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): <2
FRESH;
OLIVINE ( 1%)
Size(mm): <2
MOSTLY ALTERED TO SMEC WITH SOME FRESH;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS ALSO FOUND
IN VEINS;
CALCITE
IN VEINS AND IN VESICLES;
PYRITE
IN VEINS AND IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/ 50 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 624.95
Core: 55 Top of Core Depth (m) : 620.40
Sect: 4 Top of Section Depth(m): 624.90
LITHOLOGY: SEDIMENT;
CHERT;
Piece No. : PCE 1 (2-5);
Texture : ALTERED SEDIMENT (SMEC AND ZEOLITE ?) BETWEEN
TWO GLASSY MARGINS;
Leg : 53 Top/Bottom Interval(mm): 50/1500 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 626.40
Core: 55 Top of Core Depth (m) : 620.40
Sect: 4 Top of Section Depth(m): 624.95
LITHOLOGY: OL-PLAG MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 2 (8-13), 3 (17-23), 4A (26-41), 4B (42-47),
5 (51-61), 6A (64-89), 6B (79-87), 7 (93-96),
8 (99-104), 9 (107-117), 10 (120-122), 11 (126-134),
12 (137-150);
Texture : OL-PLAG MODERATELY PHYRIC, PILLOW BASALT, GNDMASS
IS FINE-GRAINED TO GLASSY WITH GLASS SELVAGES
PARTLY ALTERED TO SMEC AND ZEOLITE (?) MAY ALSO
BE PRESENT IN PCES 9+2, GLASSY MARGINS FOUND IN
PCES 2+9+11+12;
Structure : VEINS ARE FILLED WITH CALCITE + SMEC AND MINOR
PYRITE;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE,SMEC
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): <6
PHENOS ARE RARE AND FRESH AND UP TO 6MM IN SIZE;
OLIVINE ( 2%)
Size(mm): <2
GENERALLY ALTERED TO SMEC AND PHENOS ARE
EUHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND FOUND IN VEINS AND IN
VESICLES;
CALCITE
IN VEINS AND VESICLES;
PYRITE
IN VEINS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN GLASSY MARGINS AS A
REPLACEMENT;
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 627.80
Core: 55 Top of Core Depth (m) : 620.40
Sect: 5 Top of Section Depth(m): 626.40
LITHOLOGY: OL-PLAG-CPX MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (0-10), 2 (13-31), 3A (34-40), 3B (40-51),
4 (54-65), 5 (70-78), 6A (81-89), 6B (89-100),
6C (100-109), 7A (111-116), 7B (116-128),
8 (132-137);
Texture : OL-PLAG-CPX MODERATELY PHYRIC BASALT, PILLOW BASALT,
FINE-GRAINED TO GLASSY GNDMASS WITH GLASS
SELVAGES PARTLY ALTERED TO SMEC AND ZEOLITE
(?), GLASS ZONES ARE FOUND IN PCES 1+5+6A+7B+8;
Structure : VEINS ARE FILLED WITH SMEC + CALCITE + ZEOLITE
(?) AND MINOR PYRITE, LARGE VEIN OF SMEC AND
ZEOLITE AND TRACE PYRITE AT 76CM IN PCE 5 WITH
PARTIALLY ALTERED GLASS IN INTERPILLOW ZONE AND THE
VEIN IS UP TO 10MM THICK;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Groundmass : PLAGIOCLASE
PLAG NEEDLES VISIBLE IN COARSER REGIONS;
PYRITE
DISSEMINATED IN GNDMASS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): <8
FRESH PHENOS MOSTLY 2MM IN SIZE BUT UP TO 8MM
OCCURS;
OLIVINE ( 2%)
Size(mm): <1
PARTLY ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): TO 1
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS;
CALCITE
IN VEINS AND VESICLES;
PYRITE
IN VEINS AND GNDMASS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VEINS AND IN GLASSY
MARGINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 629.40
Core: 55 Top of Core Depth (m) : 620.40
Sect: 6 Top of Section Depth(m): 627.90
LITHOLOGY: OL-PLAG MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-19), 2 (23-26), 3A (30-43), 3B (41-47),
4A (51-59), 4B (51-60), 4C (60-69), 5 (73-77),
6A (83-87), 6B (85-90), 7 (94-100), 8A (103-110),
8B (107-117), 9 (124-127), 10 (139-145);
Texture : OL-PLAG MODERATELY PHYRIC, PILLOW BASALT, GNDMASS
IS FINE-GRAINED TO GLASSY WITH GLASS SELVAGES
PARTLY ALTERED TO SMEC, GLASSY MARGINS OCCUR IN
PCES 1+9+10 WHICH ARE PARTLY FRESH AND GLASSY MARGIN
IN PCES 2+5 ARE MORE ALTERED;
Structure : VEINS ARE FILLED WITH CALCITE AND SMEC, A LARGE VEIN
RUNS THROUGH PCES 3A+3B;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: OLIVINE ( 2%)
Size(mm): <2
PHENOS ARE GENERALLY ALTERED TO SMEC;
PLAGIOCLASE ( 1%)
Size(mm): <3
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS ALSO FOUND
IN VEINS;
CALCITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/ 720 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 630.12
Core: 55 Top of Core Depth (m) : 620.40
Sect: 7 Top of Section Depth(m): 629.40
LITHOLOGY: OL-PLAG MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-13), 2 (16-23), 3A (25-33), 3B (34-39),
4 (43-46), 5 (52-57), 6 (65-69);
Texture : OL-PLAG MODERATELY PHYRIC, PILLOW BASALT, GNDMASS
IS FINE-GRAINED TO GLASSY, GLASS SELVAGES ARE PARTLY
ALTERED TO SMEC, GLASSY MARGINS ARE FOUND IN PCES
1+2;
Structure : VEINS ARE FILLED WITH SMEC AND CALCITE, PATCHES OF
SMEC ARE FOUND IN PCES 2+3A+3B;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT, RICH IN SMEC PCE 5 IS
PROBABLY ALTERED GLASS;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: OLIVINE ( 2%)
Size(mm): <2
PHENOS ARE ALTERED TO SMEC;
PLAGIOCLASE ( 1%)
Size(mm): <4
PHENOS ARE FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND IN VEINS AND PATCHES;
CALCITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 720/1270 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 630.67
Core: 55 Top of Core Depth (m) : 620.40
Sect: 7 Top of Section Depth(m): 630.12
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 7 (73-91), 8 (96-108), 9 (112-124);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS IS FINE-GRAINED AND
HOLOCRYSTALLINE;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : FINE-GRAINED AND HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <3
FRESH PHENOS;
OLIVINE ( 8%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 3%)
Size(mm): <1
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS;
Leg : 53 Top/Bottom Interval(mm): 0/1250 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 631.05
Core: 56 Top of Core Depth (m) : 629.80
Sect: 1 Top of Section Depth(m): 629.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE PILLOW BASALT;
Piece No. : PCE 1A (2-12), 1B (12-26), 2 (29-35), 3A (37-50),
3B (50-62), 3C (61-73), 4 (76-80), 5 (84-96),
6A (99-113), 6B (113-120);
Texture : PLAG-CPX-OL PHYRIC, FINE-GRAINED TO GLASSY
GNDMASS, GLASS SELVAGES ARE ALTERED TO SMEC, GLASS
ZONES IN PCES 1B+2+3A+3C+4(?)+5+6B;
Structure : VEINS ARE FILLED WITH SMEC AND CARBONATE AND ARE
FREQUENTLY LOCATED NEAR GLASSY ZONES, MASSIVE PILLOW
BASALT;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): <0.5 Percent: 1-2
Location: Filling: CALCITE
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <6
SOMETIMES WITH INCLUSIONS OF SPINEL AND FRESH;
CLINOPYROXENE ( 3%)
Size(mm): <1
FRESH PHENOS;
OLIVINE ( 2%)
Size(mm): <2
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL AND GLASSY MARGINS ALSO FOUND IN
VEINS;
CALCITE
IN VEINS AND VESICLES;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 632.80
Core: 56 Top of Core Depth (m) : 629.80
Sect: 2 Top of Section Depth(m): 631.30
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-12), 1B (12-20), 1C (20-30), 1D (29-35),
2A (38-51), 2B (51-61), 3 (64-80), 4A (83-89),
4B (89-107), 5 (112-115), 6 (117-127), 7 (131-146);
Texture : PLAG-OL PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASS SELVAGES ON PCES 1A+1B+1C
AND ON PCES 1D+2A+2B AND THEY ARE ALTERD TO SMEC,
CHILL ZONE ONLY ON PCE 3;
Structure : PROMINENT CALCITE AND SMEC VEINS IN PCES 1B-1C AND
1D-2A AND IN PCE 2B+4A+4B+7, CALCITE VUG IN PCE 7,
SLICKENSIDES ARE PRESENT ON PCES 2B+4B;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT, SLIGHTLY BRECCIATED
PCES 4B+5+6;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <5
PHENOS ARE FRESH;
OLIVINE ( 2%)
Size(mm): <2
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND IN GLASSY ZONES ALSO FOUND
IN VEINS;
CALCITE
IN VEINS AND IN VUG;
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 634.20
Core: 56 Top of Core Depth (m) : 629.80
Sect: 3 Top of Section Depth(m): 632.80
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE PILLOW BASALT;
Piece No. : PCE 1A (3-10), 1B (10-18), 2 (23-27), 3 (30-43),
4A (46-57), 4B (58-68), 5 (71-85), 6A (89-97),
6B (97-109), 6C (110-121), 6D (122-129),
6E (129-138);
Texture : PLAG-OL PHYRIC, CONTINUATION OF PILLOW SEQUENCE OF
SECTION 56-2 IN PCES 1-3, FINE-GRAINED TO GLASSY
GNDMASS, ONE GLASS SELVAGE IN PCE 4A AND IT IS
ALTERED TO SMEC;
Structure : LARGE VEIN (>10MM WIDE) FILLED WITH SMEC ON EDGES
AND CALCITE IN THE CENTER AND SOME PYRITE IN PCE 4,
SMALLER VEIN IN PCE 1, VEINS ARE FILLED WITH SMEC
+ CALCITE + MINOR PYRITE, MASSIVE BASALT;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT, MASSIVE COOLING UNIT
THAT STARTS AT PCE 4 AND EXTENDS TO SECTION 5;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <6
FRESH PHENOS;
OLIVINE ( 4-6%)
Size(mm): <5
MOSTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS
AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1370 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 635.67
Core: 56 Top of Core Depth (m) : 629.80
Sect: 4 Top of Section Depth(m): 634.30
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (3-13), 1B (13-25), 1C (25-34), 1D (33-43),
1E (43-55), 2A (59-67), 2B (67-73), 2C (73-81),
2D (82-95), 3A (97-111), 3B (111-118), 4 (123-135);
Texture : PLAG-OL PHYRIC, FINE-GRAINED AND HOLOCRYSTALLINE
GNDMASS WHICH IS RATHER FRESH, NO GLASSY MARGINS;
Structure : THIN VEINS OF CALCITE AND SMEC ARE RARE, MASSIVE
BASALT;
Alteration : FRESH
ALL PCES EXCEPT PCES 1C+2C+4;
SLIGHTLY;
PCES 1C+2C+4;
Comments : MEDIUM GRAY BASALT;
Vesicles :
Location: Filling: CALCITE,SMEC
SPARSE VESICLES;
Groundmass : PYRITE
DISSEMINATED IN GNDMASS;
FINE-GRAINED AND HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <4
FRESH PHENOS;
OLIVINE ( 3%)
Size(mm): <2
MOSTLY FRESH WITH ONLY MINOR ALTERATION TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS ALSO IN VESICLES AND RARE
VEINS;
CALCITE
IN VESICLES AND VEINS;
PYRITE
IN GNDMASS AND VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 637.30
Core: 56 Top of Core Depth (m) : 629.80
Sect: 5 Top of Section Depth(m): 635.80
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE PILLOW BASALT;
Piece No. : PCE 1A (2-12), 1B (10-16), 1C (12-22), 1D (23-30),
2A (33-39), 2B (39-50), 3 (51-65), 4A (66-80),
4B (80-90), 4C (90-102), 4D (100-106), 4E (115-126),
5 (129-146);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY WITH GLASS
SELVAGES ONLY ON PCES 4E+5, GLASS SELVAGES ARE
SLIGHTLY ALTERED TO SMEC;
Structure : DARK GREEN SMEC AND CALCITE WITH SOME PYRITE ARE
IN SPARSE VEINS, MASSIVE BASALT, TOP OF A PILLOW
BASALT BEGINS WITH PCE 5;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY BASALT, CONTINUATION OF A MASSIVE
COOLING UNIT FROM SECTION 4 THAT GOES FROM PCE 1 TO
PCE 4;
Groundmass : PYRITE
DISSEMINATED IN GNDMASS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH;
OLIVINE ( 5%)
Size(mm): <3
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES PHENOS AND GLASS SELVAGES ALSO FOUND IN
VEINS;
CALCITE
IN VEINS;
PYRITE
IN GNDMASS AND IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 638.80
Core: 56 Top of Core Depth (m) : 629.80
Sect: 6 Top of Section Depth(m): 637.30
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (0-15), 1B (15-27), 1C (28-38), 2 (40-51),
3 (53-61), 4 (64-76), 5 (79-94), 6 (98-103),
7A (108-118), 7B (118-131), 8 (134-146);
Texture : PLAG-OL PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASS SELVAGES ARE PARTLY ALTERED
TO PALAGONITE AND SMEC;
Structure : VEINS ARE FILLED WITH CARBONATE + SMEC + PYRITE
AND MORDENITE;
Alteration : SLIGHTLY;
Comments : GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CALCITE,
Location: Filling: ZEOLITE
MINOR PYRITE ALSO IN VESICLES;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8-12%)
Size(mm): <6
EUHEDRAL AND FRESH PHENOS AND THEY OFTEN FORM
GLOMEROCRYSTS;
OLIVINE ( 2%)
Size(mm): <1
EUHEDRAL TO SUBHEDRAL PHENOS THAT VARY FROM FRESH
TO COMPLETELY ALTERED TO SMEC WITH PHENOS
OFTEN FORMS GLOMEROCRYSTS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL AND GLASS SELVAGES ALSO FOUND IN
VEINS AND VESICLES;
PALAGONITE
IN GLASSY MARGINS;
CALCITE
IN VESICLES AND VEINS;
MORDENITE
IN VEINS;
ZEOLITE
IN VESICLES;
PYRITE
MINOR AMOUNTS IN VESICLES AND IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1370 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 640.17
Core: 56 Top of Core Depth (m) : 629.80
Sect: 7 Top of Section Depth(m): 638.80
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-15), 2 (18-28), 3 (33-44), 4A (45-62),
4B (63-67), 5 (72-80), 6 (83-86), 7 (90-97),
8 (100-107), 9 (111-117), 10 (119-125),
11 (129-135);
Texture : PLAG-OL-CPX PHYRIC, PILLOW BASALT, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS ARE IN PCES 5+7
AND ARE PARTLY ALTERED TO SMEC AND PALAGONITE;
Structure : THIN SMEC VEINS ALSO HAVE MINOR PYRITE;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC,CALCITE
Groundmass : PYRITE
SOME DISSEMINATED IN GNDMASS;
PLAGIOCLASE
FRESH MICROLITS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH PHENOS THAT SOMETIMES FORMS GLOMEROCRYSTS
WITH CPX;
OLIVINE ( 5%)
Size(mm): <3
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <1
FRESH PHENOS SOMETIMES FORMING GLOMEROCRYSTS WITH
PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS ALSO FOUND
IN VEINS AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
PALAGONITE
IN GLASSY MARGINS;
PYRITE
IN GNDMASS AND IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 640.45
Core: 57 Top of Core Depth (m) : 639.00
Sect: 1 Top of Section Depth(m): 639.00
LITHOLOGY: SEDIMENT;
CHERT (JASPER);
Piece No. : PCE 3 (30-40);
Comments : CONSISTS OF SMALL PCES;
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 640.45
Core: 57 Top of Core Depth (m) : 639.00
Sect: 1 Top of Section Depth(m): 639.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-15), 2 (16-30), 4A (42-55), 4B (55-70),
4C (70-85), 4D (85-95), 4E (95-105), 4F (104-109),
4G (109-119), 4I (120-131), 4H (132-142);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS IS VARIOLITIC TO
MICROCRYSTALLINE WITH SMALL PLAG LATHS, GLASS IN
GNDMASS IS FRESH BUT GLASSY MARGINS IN PCES 1+4A
ARE MOSTLY ALTERED TO SMEC;
Structure : VEINS ARE FILLED WITH SMEC + CALCITE AND MINOR
PYRITE, PILLOW BASALT;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY TO GREENISH-GRAY BASALT, SIZE OF COOLING
UNITS INCREASES UP TO 100CM AS IN PCES 4A-4H AND
THIS COOLING UNIT WAS DECIDED TO BE A PILLOW SINCE
INTERIOR PARTS HAVE GLASSY ZONES;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CALCITE
Groundmass : PLAGIOCLASE
LATHS;
VARIOLITIC TO MICROCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 8-12%)
Size(mm): <4
FRESH EUHEDRAL PHENOS THAT RARELY FORM
GLOMEROCRYSTS;
OLIVINE ( 2-4%)
Size(mm): <1
PARTLY ALTERED TO SMEC AND RARELY FORMS
GLOMEROCRYSTS;
CLINOPYROXENE ( 3-5%)
Size(mm): TO 1
FRESH PHENOS THAT RARELY FORM GLOMEROCRYSTS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS ALSO FOUND
IN VEINS AND VESICLES;
CALCITE
IN VESICLES AND VEINS;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 641.90
Core: 57 Top of Core Depth (m) : 639.00
Sect: 2 Top of Section Depth(m): 640.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-15), 1B (15-19), 2A (20-34), 2B (35-50),
3A (52-67), 3B (68-81), 3C (82-92), 3D (91-97),
3E (98-108), 4A (110-128), 4B (120-135),
4C (135-139);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASS SELVAGES ARE MOSTLY FRESH WITH ONLY MINOR
ALTERATION TO PALAGONITE, INTERSERTAL TEXTURE IN THE
GNDMASS, PILLOW BASALT;
Structure : VEINS ARE FILLED WITH SMEC + CALCITE + ZEOLITE AND
MINOR PYRITE AND ALL OCCUR IN VEINS WHICH SHOW
COMPLEX AGE RELATIONSHIPS AND IN PCE 3A ZEOLITE VEIN
SEEMS TO BE OLDER THAN CALCITE VEIN;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY BASALT;
Vesicles : Size(mm): Percent: 0-5
Location: Filling: SMEC,CALCITE
CENTER OF VESICLES SOMETIMES FORMED BY CARBONATE;
Groundmass : PLAGIOCLASE
SMALL LATHS OF PLAG;
FINE-GRAINED TO GLASSY GNDMASS WITH INTERSERTAL
TEXTURE;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACING OL PHENOS ALSO FOUND IN VESICLES AND
VEINS;
CALCITE
IN VESICLES AND VEINS;
PYRITE
MINOR AMOUNTS IN VEINS;
ZEOLITE
ID UNCERTAIN MAY BE IN VEINS;
PALAGONITE
ALTERATION OF GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 643.50
Core: 57 Top of Core Depth (m) : 639.00
Sect: 3 Top of Section Depth(m): 642.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-7), 1B (6-17), 1C (17-32), 2A (35-48),
2B (48-60), 2C (60-64), 2D (62-70), 2E (70-80),
2F (81-97), 3A (100-109), 3B (109-119),
4A (121-135), 4B (135-140), 4C (140-147);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY-INTERSERTAL
GNDMASS, GLASS SELVAGES ARE FRESH IN PCES
1C+2A+2F+3A+4A SOMETIMES WITH PALAGONITIZED RIMS;
Structure : PILLOW BASALT, VEINS FILLED WITH SMEC + PYRITE AND
CARBONATE + ZEOLITE (?) AND MINOR PYRITE;
Alteration : SLIGHTLY
CORE SHOWS VERY LITTLE ALTERATION;
Comments : MEDIUM GRAY BASALT;
Vesicles : Size(mm): Percent: 0-5
Location: Filling: SMEC
Groundmass : PLAGIOCLASE
SMALL RANDOMLY ORIENTED LATHS;
FINE-GRAINED TO GLASSY-INTERSERTAL TEXTURE;
Phenocrysts: PLAGIOCLASE ( 8-15%)
Size(mm): TO 6
PHENOS ARE FRESH AND EUHEDRAL TO SUBHEDRAL;
OLIVINE ( 2%)
Size(mm): <1
EUHEDRAL TO SUBHEDRAL PHENOS THAT ARE MOSTLY
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND ALSO FOUND IN VESICLES AND
VEINS;
CARBONATE
IN VEINS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VEINS;
PYRITE
MINOR PYRITE IN VEINS;
PALAGONITE
ON RIMS OF GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 645.00
Core: 57 Top of Core Depth (m) : 639.00
Sect: 4 Top of Section Depth(m): 643.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-16), 2 (19-29), 3 (31-35), 4 (36-47),
5A (50-62), 5B (63-78), 6A (80-95), 6B (94-104),
6C (103-115), 6D (115-130), 6E (131-148);
Texture : PLAG-OL-CPX PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASSY MARGINS IN PCES 4+5B+6A ARE PARTLY ALTERED TO
PALAGONITE AND SMEC;
Structure : PILLOW BASALT, VEINS ARE FILLED WITH CALCITE AND
SMEC, A ZEOLITE-LIKE MINERAL (RADIALFIBROUS)
AND PYRITE IN A VEIN IN PCE 6D;
Alteration : SLIGHTLY;
Comments : GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): TO 2 Percent: 1
Location: Filling: SMEC,CALCITE
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <7
FRESH PHENOS;
OLIVINE ( 2%)
Size(mm): <1.5
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <1
FRESH PHENOS FOUND IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS ALSO FOUND IN VEINS AND
VESICLES;
CALCITE
IN VESICLES AND VEINS;
PYRITE
IN VEINS AND A GRAIN OF PYRITE 5MM DIAMETER WAS
FOUND IN PCE 6D;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 646.50
Core: 57 Top of Core Depth (m) : 639.00
Sect: 5 Top of Section Depth(m): 645.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE PILLOW BASALT;
Piece No. : PCE 1A (3-9), 1B (10-17), 2 (21-26), 3A (29-37),
3B (38-46), 4A (48-63), 4B (64-72), 4C (72-76),
4D (76-87), 5A (90-96), 5B (95-104), 5C (104-109),
5D (115-133), 5E (133-146), 5F (146-148);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASSY MARGINS IN PCES 1B+2+3A+3B+4A ARE PARTLY
ALTERED TO SMEC + CALCITE AND PINK ZEOLITE (?)
OCCURS AMONG THE CLAY MINERALS IN PCE 4A;
Structure : UPPER PART OF SECTION TO 62CM IS PILLOWED AND THE
LOWER PART IS A MASSIVE COOLING UNIT WHICH CONTINUES
THROUGH SECTION SIX, THIN SMEC VEINS AND CRACKS
OCCUR AND PYRITE IS FOUND MAINLY NEAR THESE VEINS,
CALCITE + SMEC + QUARTZ FILL CAVITY IN PCE 5D;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: SMEC,CALCITE,
Location: Filling: PYRITE
VESICLES OCCUR NEAR THE GLASSY MARGINS;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (12-15%)
Size(mm): <5
FRESH PHENOS;
OLIVINE ( 3%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS ALSO FOUND IN VEINS AND IN
VESICLES AND IN GLASSY MARGINS;
CALCITE
IN GLASSY MARGINS AND VESICLES;
PYRITE
IN VESICLES AND VEINS;
ZEOLITE
ID UNCERTAIN FOR THIS PINK MINERAL MAY BE PRESENT
IN GLASSY MARGIN;
QUARTZ
IN PCE 5D CAVITY ALSO FILLED WITH CALCITE + SMEC;
Leg : 53 Top/Bottom Interval(mm): 0/ 450 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 646.95
Core: 57 Top of Core Depth (m) : 639.00
Sect: 6 Top of Section Depth(m): 646.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE BASALT;
Texture : CONTINUATION OF 57-5, PLAG-OL PHYRIC, FINE-GRAINED
AND HOLOCRYSTALLINE GNDMASS;
Structure : MASSIVE COOLING UNIT;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY BASALT;
Groundmass : FINE-GRAINED AND HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE (12-15%)
Size(mm): <5
FRESH PHENOS;
OLIVINE ( 2%)
Size(mm): <3
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 649.70
Core: 58 Top of Core Depth (m) : 648.20
Sect: 1 Top of Section Depth(m): 648.20
LITHOLOGY: LPLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-19), 2 (21-32), 3 (34-44), 4 (46-54),
5A (55-68), 5B (68-80), 5C (78-91), 5D (91-94),
6 (97-100), 7A (103-111), 7B (110-120),
8A (121-130), 8B (129-137), 8C (136-145);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY AND
INTERSERTAL GNDMASS, FRESH GLASSY MARGINS IN
PCES 5A+5D+7A MOSTLY WITH PALAGONITIZED OUTER RIMS;
Structure : PILLOWS, VEINS ARE FILLED WITH CARBONATE + SMEC
AND PYRITE, BIG CALCITE XTLS AND THICK CARBONATE
VEIN AT BASE OF SECTION IN PCES 7B-8C;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY BASALT;
Vesicles : Size(mm): Percent: 0.
Location: 5 Filling: CALCITE,ZEOLITE
NOT SURE IF MINERAL ZEOLITE IS PRESENT;
Groundmass : PLAGIOCLASE
RANDOMLY ORIENTED PLAG;
FINE-GRAINED TO GLASSY AND INTERSERTAL;
Phenocrysts: PLAGIOCLASE ( 8-12%)
Size(mm): <5
EUHEDRAL FRESH PHENOS;
OLIVINE ( 3%)
Size(mm): <1
SUBHEDRAL PHENOS THAT ARE PARTLY REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS ALSO FOUND IN VEINS;
CALCITE
IN VEINS AND VESICLES;
PYRITE
IN VEINS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VESICLES;
PALAGONITE
ON OUTER RIMS OF GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 651.20
Core: 58 Top of Core Depth (m) : 648.20
Sect: 2 Top of Section Depth(m): 649.70
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-10), 1B (10-20), 1C (20-26), 2 (27-30),
3A (33-42), 3B (42-56), 3C (57-67), 3D (67-77),
3E (77-91), 3F (91-99), 3G (98-106), 3H (106-116),
3I (115-119), 3J (120-123), 4 (125-137),
5 (139-148);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY MARGINS WITH
THE GNDMASS BEING MORE FINE-GRAINED NEAR THE
GLASSY MARGINS THAN IN THE INTERIOR OF THE PILLOWS,
GLASSY MARGINS IN PCES 1C+2+3A+3I+3J WHICH ARE
PARTLY ALTERED TO SMEC AND ZEOLITE (?);
Structure : VEINS ARE FILLED WITH CALCITE + SMEC + PYRITE IN
PCES 1+3B+3C+3J, ABUNDANT CRACKS WITH SLICKENSIDES
PRESENT OCCUR THROUGHOUT SECTION;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY BASALT;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: CALCITE,SMEC,
Location: Filling: SILICA
MORE ABUNDANT NEAR GLASSY MARGINS;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <7
FRESH PHENOS WITH ONE INCLUSION OF SPINEL IN PLAG
IN PCE 3E;
OLIVINE ( 2%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 1-2%)
Size(mm): <3
FRESH PHENOS;
SPINEL
AN INCLUSION IN PLAG PHENOS IN PCE 3E;
Replacement: REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS
AND VESICLES;
CARBONATE
IN VESICLES AND VEINS;
PYRITE
IN VEINS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT AS PINK MORDENITE IN
GLASSY MARGINS;
SILICA
IN VESICLES;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 652.70
Core: 58 Top of Core Depth (m) : 648.20
Sect: 3 Top of Section Depth(m): 651.20
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-9), 1B (7-15), 2 (17-24), 3 (27-30),
4 (33-40), 5 (43-47), 6A (51-57), 6B (57-66),
6C (66-73), 7A (75-89), 7B (89-101), 7C (102-114),
7D (114-125), 8 (127-132), 9A (135-140),
9B (138-142), 9C (144-147);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS IS FINE-GRAINED TO
GLASSY, GLASSY MARGIN IS IN PCE 6A AND IS ALTERED TO
SMEC;
Structure : PILLOW BASALT, VEINS ARE FILLED WITH SMEC AND
CALCITE AND MINOR PYRITE, CALCITE VEINS UP TO
5MM WIDE WITH DARK GREEN SMEC MARGINS IN PCES 6+7,
ABUNDANT FRACTURES WITH SLICKENSIDES;
Alteration : SLIGHTLY;
Comments : GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): <2 Percent: 1-2
Location: Filling: CALCITE,SMEC
Groundmass : FINE-GRAINED TO GLASSY GNDMASS THAT IS SLIGHTLY
ALTERED TO SMEC;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <7
FRESH PHENOS WITH SOME INCLUSIONS OF SPINEL;
OLIVINE ( 2%)
Size(mm): <3
OL PHENOS ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH PHENOS;
SPINEL
RARE INCLUSIONS IN PLAG PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GNDMASS AND GLASS ALSO
IS IN VEINS AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 654.20
Core: 58 Top of Core Depth (m) : 648.20
Sect: 4 Top of Section Depth(m): 652.70
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1 (2-14), 2 (16-20), 3 (32-53), 4 (55-68),
5A (70-75), 5B (72-77), 5C (77-78), 6 (80-95),
7 (97-107), 8 (110-117), 9 (121-135), 10 (138-148);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS IS FINE-GRAINED TO
GLASSY INTERSERTAL TEXTURE WITH THE GLASS GENERALLY
PALAGONITIZED;
Structure : VEINS ARE FILLED WITH CALCITE + SMEC + ZEOLITE (?)
AND MINOR PYRITE;
Alteration : SLIGHTLY
PCES 1-5 AND PCES 9+10;
MOD
PCES 6+7+8;
Comments : GRAY TO GREENISH-GRAY BASALT;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: SMEC,ZEOL,PYRITE
VESICLES ARE FILLED WITH ZEOLITE AND OFTEN COATED
WITH SMEC OR PYRITE;
Groundmass : FINE-GRAINED TO GLASSY INTERSERTAL TEXTURE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH PHENOS;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND IS ALSO PRESENT IN VEINS
AND VESICLES;
PALAGONITE
GLASS IN GNDMASS IS OFTEN PALAGONITIZED;
CALCITE
IN VEINS;
PYRITE
IN VEINS AND VESICLES;
ZEOLITE
ID UNCERTAIN IS POSSIBLY MORDENITE AND IS FOUND IN
THE VESICLES;
Leg : 53 Top/Bottom Interval(mm): 0/ 860 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 655.06
Core: 58 Top of Core Depth (m) : 648.20
Sect: 5 Top of Section Depth(m): 654.20
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (4-14), 2 (17-30), 3 (34-42), 4 (45-57),
5 (60-69), 6 (75-84);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASSY MARGIN IN PCE 2 IS PARTLY ALTERED TO SMEC;
Structure : VEINS ARE COMMON AND FILLED WITH SMEC AND OFTEN
SLICKENSIDED, ROCK IS CRUSHED;
Alteration : SLIGHTLY;
Comments : GRAY TO GREENISH-GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH PHENOS;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
PLAGIOCLASE ( 8-12%)
Size(mm): <6
EUHEDRAL AND FRESH PHENOS;
OLIVINE ( 1-2%)
Size(mm): <1
EUHEDRAL TO SUBHEDRAL PHENOS WHICH ARE MOSTLY
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 658.90
Core: 59 Top of Core Depth (m) : 657.40
Sect: 1 Top of Section Depth(m): 657.40
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-12), 2A (14-20), 2B (20-28), 3 (34-36),
4 (40-50), 5 (53-57), 6 (61-73), 7 (76-78),
8A (81-93), 8B (93-105), 8C (105-115), 9 (117-120),
10 (123-127), 11 (130-136), 12 (138-146);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASSY MARGINS IN PCES 1+8A+11 WHICH ARE MOSTLY
ALTERED TO SMEC, CHILLED ZONE POSSIBLY ON TOP OF
PCE 4;
Structure : LARGE VEINS FILLED WITH CALCITE AND SMEC IN
PCES 6+8B+12, BRECCIATED WITH CALCITE + SMEC AS A
CEMENT BETWEEN THE FRAGMENTS IN PCE 2;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE,SMEC
Groundmass : PLAGIOCLASE
ACICULAR FRESH PLAG;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH PHENOS;
OLIVINE ( 1%)
Size(mm): <2
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS AND IS ALSO
IN VEINS AND VESICLES;
CALCITE
IN VESICLES AND VEINS;
ZEOLITE
ID UNCERTAIN POSSIBLY OCCURS IN PCE 1;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Johnson, D.
Hole: 418A Sample Midpoint (m) : 660.40
Core: 59 Top of Core Depth (m) : 657.40
Sect: 2 Top of Section Depth(m): 658.90
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-13), 1B (15-27), 2A (33-38), 2B (40-47),
2C (48-60), 2D (62-71), 2E (73-79), 2F (81-88),
2G (90-97), 3 (32-36), 4 (110-118), 5 (121-127),
6 (130-146);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASS SELVAGES ARE PARTLY ALTERED TO DARK GREEN
SMEC, SLICKENSIDES IN PCE 2B, BRECCIATED LEFT EDGE
IS MIXED WITH GLASS IN PCE 4, GLASSY ZONES ARE IN
PCES 2A+3+4+5+6;
Structure : PILLOW BASALT, VERY PROMINENT FRACTURE THROUGH
CENTER OF CORE FILLED WITH CALCITE, LARGE VEIN OF
CALCITE IN PCES 2C+2D+2E;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8-12%)
Size(mm): 1-2
FRESH PHENOS;
OLIVINE ( 3%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL AND GLASS ALSO FOUND IN VEINS;
CALCITE
IN VEINS AND FRACTURES AND IN PCE 2E THE XTLS
REACH 5-7MM IN LENGTH;
PYRITE
PRESENT ONLY IN PCE 2D;
Leg : 53 Top/Bottom Interval(mm): 0/1420 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 661.82
Core: 59 Top of Core Depth (m) : 657.40
Sect: 3 Top of Section Depth(m): 660.40
LITHOLOGY: PLAG-OL MODERATELY PHYRIC TO PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-7), 2 (9-12), 3 (15-20), 4A (23-38),
4B (38-50), 4C (50-60), 5 (64-80), 6 (82-96),
7A (100-114), 7B (113-117), 8 (120-128),
9 (130-140);
Texture : PLAG-OL MODERATELY PHYRIC TO PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS, GLASS SELVAGES ARE MOSTLY FRESH
AND SOME ARE PARTLY ALTERED TO DARK GREEN SMEC,
GLASSY ZONES IN PCES 1 (3-6CM) + 2 (9-12CM) +
3 (17-20CM) + 4A (24-25CM) + 5 (67-68CM) +
7B (117CM) + 9 (135CM) AND GLASS IS FRESH IN PCES
1+2+4A+7B;
Structure : PILLOW BASALT, PROMINENT SMEC AND CALCITE VEINS IN
PCES 1+4B+4C+5+6+7A;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CALCITE
Groundmass : PLAGIOCLASE
NEEDLES VISIBLE IN GNDMASS;
PYRITE
DISSEMINATED IN GNDMASS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <5
FRESH PHENOS;
OLIVINE ( 1-2%)
Size(mm): <1
GENERALLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS
AND VESICLES;
CALCITE
IN VESICLES AND VEINS;
PYRITE
SMALL AMOUNT IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 663.40
Core: 59 Top of Core Depth (m) : 657.40
Sect: 4 Top of Section Depth(m): 661.90
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-13), 1B (13-25), 2 (27-30), 3A (34-45),
3B (46-56), 3C (56-68), 4A (71-84), 4B (84-95),
4C (95-105), 4D (105-116), 4E (117-125),
4F (126-137), 4G (137-141), 5 (144-146);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASSY MARGINS PARTLY ALTERD TO SMEC AND ARE
FOUND IN PCES 1A+4A, BRECCIATED PARTS CONSISTING OF
XTLLINE BASALT FRAGMENTS IN A CEMENT OF DARK GREEN
SMEC + CALCITE + WHITE ZEOLITE (?) IN PCES
2+3A+3B+3C+4E+4F+4G;
Structure : PILLOW BASALT, VEINS ARE FILLED WITH CALCITE AND
SMEC AND ARE FOUND IN PCES 1+4A+4B;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <6
FRESH PHENOS;
OLIVINE ( 1-2%)
Size(mm): <2
GENERALLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND ALSO FOUND IN GLASSY
MARGINS AND IN VEINS;
CALCITE
IN VEINS AND IN BRECCIA;
ZEOLITE
ID UNCERTAIN BUT MAY BE PRESENT AS A WHITE MINERAL
IN THE BRECCIA;
Leg : 53 Top/Bottom Interval(mm): 0/1070 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 664.47
Core: 59 Top of Core Depth (m) : 657.40
Sect: 5 Top of Section Depth(m): 663.40
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-14), 1B (14-26), 1C (27-41), 1D (42-50),
2A (53-62), 2B (62-73), 3A (75-84), 3B (84-96),
3C (97-107);
Texture : PLAG-OL MODERATELY PHYRIC, FINE-GRAINED TO GLASSY,
GLASSY MARGINS HAVE MINOR ALTERATION TO SMEC AND
ARE PRESENT IN PCES 1A+3C;
Structure : PILLOWS, PROMINENT BRECCIATED VEINS FOUND IN PCE 1C
AT (27-32CM) + 1D (41-50CM) + 2A (53-61CM) AND IN
PCE 2B (70CM) ARE FILLED WITH CALCITE AND SMEC;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 6%)
Size(mm): <4
FRESH PHENOS;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS AND IS ALSO
FOUND IN VEINS;
CALCITE
IN VEINS AND VESICLES;
Leg : 53 Top/Bottom Interval(mm): 1070/1400 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 664.80
Core: 59 Top of Core Depth (m) : 657.40
Sect: 5 Top of Section Depth(m): 664.47
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 3D (107-117), 3E (117-124), 4 (127-139);
Texture : TEXTURALLY AND MINERALOGICALLY THE SAME AS CORE 59-5
INTERVAL 0-170CM EXCEPT THAT CPX XTLS ARE NOW
PRESENT, GLASSY ZONES IN PCE 3D;
Structure : SLICKENSIDES ARE PRESENT ON PCE 4 AT 130CM, VEINS
ARE BRECCIATED AND OCCUR IN PCES 3E+4 THEY ARE
FILLED WITH CALCITE + SMEC;
Phenocrysts: CLINOPYROXENE ( 1%)
Size(mm): <5
FRESH AND EUHEDRAL PHENOS;
Leg : 53 Top/Bottom Interval(mm): 0/1380 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 666.28
Core: 59 Top of Core Depth (m) : 657.40
Sect: 6 Top of Section Depth(m): 664.90
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-13), 1B (14-18), 2A (22-35), 2B (35-47),
3A (50-61), 3B (63-70), 4 (74-77), 5 (84-97),
6A (99-107), 6B (108-123), 6C (123-136);
Texture : PLAG-OL-CPX PHYRIC, FINE-GRAINED TO GLASSY
GNDMASS, GLASSY MARGINS IN PCES 1B+2A+4+5 AND
GLASS IS FRESH THROUGHOUT WITH PARTIAL ALTERATION TO
SMEC;
Structure : PILLOWS, PROMINENT VEINS FILLED WITH CALCITE AND
SMEC AND POSSIBLY ZEOLITE (?) IN PCES 1A+1B AT
(3-18CM), WHICH IS BRECCIATED AND PCES 2A+2B
(21-47CM) + 3A (50CM) + 3B (70CM) + 5 (92CM) + 6A
+ 6B (108-120 AND 121-134CM), MINOR PYRITE IN SOME
VEINS, SLICKENSIDES ON PCE 3B (69CM);
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: <1
Location: Filling: CARBONATE
Groundmass : PLAGIOCLASE
PLAG NEEDLES ARE VISIBLE;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <6
SERIATE FRESH PHENOS;
OLIVINE ( 1-2%)
Size(mm): <1
PARTIALLY TO COMPLETELY ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS;
CALCITE
IN VEINS AND VESICLES;
PYRITE
MINOR AMOUNTS IN VEINS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 667.85
Core: 59 Top of Core Depth (m) : 657.40
Sect: 7 Top of Section Depth(m): 666.40
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-14), 1B (14-25), 1C (26-37), 2 (41-55),
3 (57-64), 4 (67-70), 5 (74-86), 6A (89-101),
6B (102-114), 7 (116-128), 8 (130-140), 9 (142-144);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASSY MARGINS IN PCES 3+4+5 AND ARE PARTLY ALTERED
TO DARK GREEN SMEC, GLASSY MARGIN IN PCE 3 SEEMS
TO BE PARTLY BRECCIATED IN FINE FRAGMENTS AND A PINK
MINERAL (ZEOLITE ?) IS PRESENT;
Structure : PILLOWS, VEINS FILLED WITH CARBONATE AND SMEC
ARE PARTICULARLY IMPORTANT IN PCES 1C+2+7;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <5
FRESH PHENOS;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE
ONE GRAIN 4MM IN SIZE FOUND IN PCE 3;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS;
CALCITE
IN VEINS AND VESICLES;
ZEOLITE
IN PCE 3 GLASSY MARGIN;
Leg : 53 Top/Bottom Interval(mm): 0/1410 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 668.41
Core: 60 Top of Core Depth (m) : 667.00
Sect: 1 Top of Section Depth(m): 667.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC TO PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-14), 1B (14-26), 1C (26-40), 1D (40-51),
1E (52-65), 1F (65-76), 1G (77-90), 2A (93-105),
2B (105-115), 2C (115-126), 2D (127-140);
Texture : PLAG-OL-CPX MODERATELY PHYRIC TO PHYRIC, GNDMASS
IS FINE-GRAINED TO GLASSY, GLASSY MARGINS ARE FRESH
WITH MINOR ALTERATION TO SMEC AND SOME RIMS ARE
PALAGONITIZED IN PCES 1G+2A;
Structure : PILLOWS, SCATTERED VEINS ARE FILLED WITH SMEC
+ CALCITE + IRON OXIDES AND MINOR PYRITE;
Alteration : SLIGHTLY
PCES 1A-1D;
MOD
PCES 1E-2D, PALAG ON GLASS RIMS;
Comments : MEDIUM TO DARK GRAY BASALT WITH SOME BROWN STAINING
IN LOWER PART OF SECTION, BASALT IS INCIPIENTLY
BRECCIATED BELOW 60CM;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: SMEC,CALCITE,ZEOL
ID OF ZEOLITE NOT CERTAIN;
Groundmass : PLAGIOCLASE
PLAG XTLS VISIBLE IN GNDMASS;
FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <5
FRESH AND EUHEDRAL PHENOS WHICH ARE MOST ABUNDANT
IN UPPER PART OF SECTION;
OLIVINE ( 2%)
Size(mm): <1
MOSTLY ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS
AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
PYRITE
IN VEINS;
FERROUS OXIDE
IN VEINS;
PALAGONITE
ON RIMS OF GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 670.00
Core: 60 Top of Core Depth (m) : 667.00
Sect: 2 Top of Section Depth(m): 668.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC TO PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-14), 1B (14-24), 1C (23-36), 1D (36-45),
1E (45-57), 1F (58-66), 2 (67-73), 3 (75-88),
4 (90-97), 5 (100-107), 6 (109-112), 7A (115-126),
7B (126-138), 7C (138-148);
Texture : PLAG-OL-CPX MODERATELY PHYRIC TO PHYRIC, GNDMASS IS
FINE-GRAINED TO GLASSY, GLASSY MARGINS ARE PARTLY
ALTERED TO SMEC AND ARE FOUND IN PCES 2+3+4+5,
SOME PCES ARE BRECCIATED WITH CALCITE + SMEC AS
CEMENT;
Structure : PILLOWS, SCATTERED VEINS ARE FILLED WITH CALCITE
AND SMEC AND THEY CEMENT BRECCIATED PCES TOGETHER;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT, BROWN STAINING IN UPPER
PART OF SECTION;
Vesicles : Size(mm): <3 Percent: 2
Location: Filling: SMEC,CALCITE
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 4-12%)
Size(mm): <7
FRESH PHENOS AND MOST ABUNDANT FROM PCE 3-7C;
OLIVINE ( 2%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <3
SUBHEDRAL TO ANHEDRAL AND OFTEN INTERGROWN WITH
PLAG PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS
AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 671.50
Core: 60 Top of Core Depth (m) : 667.00
Sect: 3 Top of Section Depth(m): 670.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC TO PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (1-15), 1B (15-19), 1C (19-27), 1D (26-30),
2 (33-38), 3A (41-46), 3B (46-56), 3C (56-60),
3D (61-65), 4A (67-76), 4B ( 76-84), 4C (87-100),
4D (100-110), 4E (111-123), 4F (124-136),
5 (140-148);
Texture : PLAG-CPX-OL MODERATELY PHYRIC TO PHYRIC, GNDMASS
IS FINE-GRAINED TO GLASSY AND APHANITIC WITH THE
GLASS ALTERED TO SMEC IN PCES 3C+4A AND GLASS IS
FRESH IN PCE 2;
Structure : PILLOWS, VEINS ARE SCATTERED AND ARE FILLED WITH
CALCITE + SMEC + MINOR ZEOLITE (?) + SILICA;
Alteration : MOD;
Comments : BASALT IS MEDIUM TO DARK GRAY, INCIPIENTLY
BRECCIATED BASALT IN PCES 2+4D+5;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE,SMEC,
Location: Filling: ZEOLITE
Groundmass : PLAGIOCLASE
LATHS FORM A NETWORK;
FINE-GRAINED TO GLASSY AND APHANITIC;
Phenocrysts: PLAGIOCLASE ( 2-6%)
Size(mm): <8
FRESH PHENOS THAT ARE EUHEDRAL TO SUBHEDRAL AND
ARE MOST ABUNDANT IN PCES 1A-1D AND SOME PLAG
FORMS GLOMEROCRYSTS WITH CPX;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <2
CPX IS FRESH AND TRANSPARENT AND IS DARK TO LIGHT
GREEN AND ALSO SUBHEDRAL XTLS SOMETIMES FORMING
GLOMEROCRYSTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND SOME GLASS ALSO IS FOUND IN
VEINS AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
SILICA
IN VEINS;
ZEOLITE
IN VESICLES AND POSSIBLY IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/ 250 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 671.75
Core: 60 Top of Core Depth (m) : 667.00
Sect: 4 Top of Section Depth(m): 671.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-15), 1B (15-25);
Texture : PLAG-OL MODERATELY PHYRIC, FINE-GRAINED GNDMASS,
BRECCIATED PCES 1A+1B;
Structure : PILLOW BASALT, NUMEROUS VEINLETS FILLED WITH
CALCITE + SMEC + SILICA;
Alteration : MOD;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): <2 Percent: 1-2
Location: Filling: SMEC,CALCITE
Groundmass : FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): <4
FRESH PHENOS;
OLIVINE ( <1%)
Size(mm): <1
PHENOS ARE ALTERED TO SMEC;
CLINOPYROXENE ( RARE%)
Size(mm): <1
RARE PHENOS ARE INTERGROWN WITH PLAG AND ARE
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND FOUND IN VEINS AND
VESICLES;
CALCITE
IN VEINS AND VESICLES;
SILICA
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 250/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 673.00
Core: 60 Top of Core Depth (m) : 667.00
Sect: 4 Top of Section Depth(m): 671.75
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1C (25-34), 1F (34-49), 1E (50-51), 1F (51-61),
1G (61-73), 1H (74-86), 1I (86-98), 1J (99-111),
1K (110-121), 1L (121-125), 1M (135-147);
Texture : PLAG MODERATELY PHYRIC, GNDMASS IS FINE TO
MEDIUM-GRAINED WITH GRAIN SIZE INCREASING DOWNWARD
IN THE COLUMN;
Structure : MASSIVE BASALT, VEINS ARE SPARSE AND FILLED WITH
SMEC + CALCITE AND MINOR PYRITE, A RATHER THICK
VEIN WHICH HAS MARGINAL ZONES OF ALTERATION OF
HOST ROCK ABOUT 1-2CM WIDE IN PCES 1E-1F, A THICK
CALCITE VEIN IN PCES 1J-1K AND THE VEIN TERMINATES
WITH PYRITE;
Alteration : MOD
BROWNISH DISCOLORATION ALONG FRACTURES AND VEINS;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): <2 Percent: 7-10
Location: Filling: CALCITE,SMEC
FILLED WITH CARB MOSTLY IN PCES 1D-1H AND MOSTLY
FILLED WITH SMEC IN PCES 1H-1M;
Groundmass : FINE TO MEDIUM-GRAINED WITH GRAIN SIZE INCREASING
DOWNWARD IN THE COLUMN;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <7
FRESH PHENOS;
Replacement: SMECTITE
IN VEINS AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 674.50
Core: 60 Top of Core Depth (m) : 667.00
Sect: 5 Top of Section Depth(m): 673.00
LITHOLOGY: PLAG SPARSELY TO MODERATELY PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (2-14), 1B (15-26), 1C (26-36), 1D (36-37),
1F (49-53), 1G (54-61), 1H (61-76), 1I (76-85),
1J (86-100), 1K (100-110), 1L (110-121),
1M (122-130), 1N (130-135), 1O (136-140),
1P (140-149);
Texture : PLAG SPARSELY TO MODERATELY PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS BUT NO GLASSY SELVAGES ARE
PRESENT, SOME SCHLIEREN OF GLASS ARE STILL PRESENT
IN THE GNDMASS;
Structure : MASSIVE BASALT, VEINS ARE SCATTERED THROUGHOUT AND
CONTAIN CALCITE + SMEC + ZEOLITE (?) + PYRITE
IN MINOR AMOUNTS;
Alteration : MOD;
Comments : MEDIUM TO DARK GRAY, DUE TO RELATIVELY HIGH GLASS
CONTENT THIS ROCK REPRESENTS A FLOW RATHER THAN A
SILL THERE IS NO OTHER EVIDENCE SINCE THE UPPER PART
OF THIS UNIT IS BRECCIATED I.E. NO CLEAR CONTACT
RELATIONSHIPS EXIST;
Vesicles : Size(mm): Percent: 5
Location: Filling: SMEC,CALCITE,
Location: Filling: PYRITE
SOME VESICLES ARE COATED WITH PYRITE;
Groundmass : PLAGIOCLASE
CONSISTS MAINLY OF PLAG XTLS;
FINE-GRAINED TO GLASSY WITH SOME SCHLIEREN
PRESENT ON THE GLASS;
Phenocrysts: PLAGIOCLASE ( 0-4%)
Size(mm): <5
FRESH PHENOS ARE MORE ABUNDANT IN LOWER PART OF
SECTION (2-4%) THAN IN UPPER PART (0-1%) AND ARE
EUHEDRAL IN SHAPE;
Replacement: SMECTITE
IN VEINS AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
PYRITE
IN VEINS AND VESICLES;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/ 670 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 675.17
Core: 60 Top of Core Depth (m) : 667.00
Sect: 6 Top of Section Depth(m): 674.50
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (2-14), 1B (14-26), 2A (28-41), 2B (42-54),
2C (54-66);
Texture : PLAG MODERATELY PHYRIC, FINE-GRAINED GNDMASS WITH
NO SELVAGES PRESENT;
Structure : MASSIVE BASALT, MINOR VEINS FILLED WITH SMEC;
Alteration : MOD;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): <1 Percent: 2
Location: Filling: SMEC
FILLED MOSTLY WITH SMEC;
Groundmass : FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 7-9%)
Size(mm): <4
FRESH PLAG MICROLITES;
Replacement: SMECTITE
IN VEINS AND VESICLES;
Leg : 53 Top/Bottom Interval(mm): 0/1250 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 677.75
Core: 61 Top of Core Depth (m) : 676.50
Sect: 1 Top of Section Depth(m): 676.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1 (2-20), 2 (23-31), 3 (35-37), 4 (43-55),
5A (57-71), 5B (70-85), 6 (88-110), 7 (113-123);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS CONSISTS OF
SUBOPHITIC CLOTS IN GLASSY MATRIX "OPHIMOTTLED" TEXTURE;
Structure : MASSIVE BASALT, VEINS ARE RARE AND FILLED WITH
CALCITE AND SMEC;
Alteration : FRESH;
Comments : MEDIUM GRAY BASALT, ROCK IS UNUSUAL IN ITS
MASSIVENESS + EXTREME FRESHNESS AND SCARCITY OF
VEINS;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC
Groundmass : SUBOPHITC CLOTS IN GLASSY MATRIX- "OPHIMOTTLED" TEXTURE;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <4
FRESH PLAG PHENOS WITH LABRADORITE IRRIDESCENCE
PRESENT AND SOME FELDSPARS ARE UNUSUALLY
INCLUSION FREE;
OLIVINE ( <1%)
Size(mm): TO 1
ALTERED TO SMEC;
Replacement: CALCITE
IN VEINS;
SMECTITE
IN VEINS AND VESICLES;
Leg : 53 Top/Bottom Interval(mm): 0/1000 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 677.50
Core: X 1 Top of Core Depth (m) : 676.50
Sect: Top of Section Depth(m): 676.50
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1 (2-22), 2 (29-34), 3 (39-44), 4 (48-56),
5 (60-66), 6 (72-81), 7 (84-97);
Texture : PLAG MODERATELY PHYRIC, GNDMASS CONSISTS OF
SUBOPHITIC CLOTS IN GLASSY MATRIX - "OPHIMOTTLED" TEXTURE;
Structure : VEINS ARE RARE AND CONTAIN CARBONATE AND SMEC,
MASSIVE BASALT;
Alteration : SLIGHTLY;
Comments : MEDIUM GRAY BASALT, SECTION IS FROM BIT;
Vesicles : Size(mm): Percent: 4
Location: Filling: SMEC
VESICLES ARE COMMON IN PCE 1 AND ARE FILLED WITH
DARK GREEN SMEC;
Groundmass : SUBOPHITIC CLOTS IN GLASSY MATRIX- "OPHIMOTTLED" TEXTURE;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <4
FRESH PHENOS;
Replacement: SMECTITE
IN VESICLES AND VEINS;
CALCITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1440 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 687.44
Core: 62 Top of Core Depth (m) : 686.00
Sect: 1 Top of Section Depth(m): 686.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-15), 1B (15-25), 1C (24-33), 2A (35-47),
2B (47-56), 3A (59-74), 3B (74-87), 4A (92-110),
4B (110-127), 5 (131-143);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS ARE SOMEWHAT
BRECCIATED AND PARTLY ALTERED TO SMEC AND
ZEOLITE (?), GLASSY MARGINS ARE IN PCES 1C (32CM)
+ 2A (36CM) + 3A (60CM) +4A (92CM) + 5 (140CM);
Structure : PILLOW BASALT, SCATTERD VEINS ARE FILLED WITH
SMEC + CALCITE, BROWN SMEC VEIN IN
PCES 1A + 1B AND CALCITE + SMEC VEINS IN PCS 2A + 5,
SMALL PYRITE VUG OCCURS IN PCES 4A;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CALCITE
VESICULARITY INCREASES TOWARDS THE BOTTOM;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 3-8%)
Size(mm): <3
FRESH PHENOS SOMETIMES LOCALLY CONCENTRATED IN
PCES 1A + 3B;
CLINOPYROXENE ( 1%)
FRESH PHENOS;
OLIVINE ( <1%)
Size(mm): <1
PARTLY ALTERED TO SMEC AND LESS ABUNDANT IN
THE BOTTOM OF THE SECTION;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND IS FOUND IN VESICLES AND
VEINS AND GLASSY MARGINS;
CALCITE
IN VEINS AND VESICLES;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN GLASSY MARGINS;
PYRITE
IN VUG;
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 688.95
Core: 62 Top of Core Depth (m) : 686.00
Sect: 2 Top of Section Depth(m): 687.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (4-17), 2 (21-35), 3A (39-51), 3B (52-68),
4A (71-81), 4B (80-87), 5A (89-101), 5B (101-107),
5C (107-110), 6 (112-124), 7 (125-136),
8 (138-145);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS, GLASS SELVAGES ARE PARTLY
ALTERED TO GREEN SMEC, GLASS ZONES IN PCES 1 AT
(5-10CM) + 2 (22-35) + 3A (38-40) + 4A (77-80)
+ 4B (80-83);
Structure : PILLOW BASALT, ROCK IS RELATIVELY MASSIVE BUT HAS
NUMEROUS VEINS FILLED WITH SMEC + CALCITE AND
ZEOLITE (?), PROMINENT VEINS ARE PRESENT IN
PCES 3B (55-65CM) + 5A (90-95) + 6 (120CM)
+ 7 (132CM);
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE
Groundmass : FINE-GRAINED TO GLASSY GNDMASS;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <3
GENERALLY 1-3MM AND FRESH PHENOS;
CLINOPYROXENE ( 2-3%)
Size(mm): <3
EUHEDRAL AND FRESH GREEN PHENOS;
OLIVINE ( 1%)
Size(mm): <1
RARE PHENOS OCCUR AND ARE ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES RARE OL PHENOS AND IS ALSO PRESENT IN
VEINS;
CALCITE
IN VEINS AND IN VESICLES;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1430 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 690.43
Core: 62 Top of Core Depth (m) : 686.00
Sect: 3 Top of Section Depth(m): 689.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (3-13), 2A (16-23), 2B (23-27), 2C (27-34),
3 (37-47), 4A (51-61), 4B (61-71), 5 (75-84),
6 (86-100), 7A (103-114), 7B (114-124), 8 (126-132),
9 (135-142);
Texture : PLAG-OL MODERATELY PHYRIC, GLASSY MARGINS IN
PCES 1 (5CM) + 2A (18CM) + 2C (34CM) + 6 (100CM)
+ 7 (104CM) + 9 (141CM), GLASSY MARGINS ARE OFTEN
BRECCIATED AND PARTLY ALTERED TO SMEC AND ZEOLITE
(?), BRECCIATION IS VERY IMPORTANT IN THIS SECTION
ESPECIALLY IN PCES 1+4A+4B+5+6+7A+7B THE CEMENT IS
SMEC BUT IS NOT AUBNDANT, FINE-GRAINED TO GLASSY
GNDMASS;
Structure : VEIN FILLED WITH CALCITE + SMEC IN PCE 6;
Alteration : SLIGHTLY;
Comments : BRECCIATION IS COMMON WITH FRAGMENTS OF XTLLINE
BASALT IN A SMEC MATRIX;
Vesicles : Size(mm): Percent: 3
Location: Filling: CALCITE,SMEC
MOSTLY FILLED WITH CARBONATE AND SOME WITH SMEC;
Groundmass : FINE-GRAINED TO GLASSY GNDMASS;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <5
FRESH AND EUHEDRAL PHENOS;
OLIVINE ( 1%)
ALTERED TO SMEC;
Replacement: CALCITE
IN VEINS AND VESICLES;
SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND ALSO IN GLASSY MARGINS AND
VEINS AND VESICLES;
Leg : 53 Top/Bottom Interval(mm): 0/1410 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 691.91
Core: 62 Top of Core Depth (m) : 686.00
Sect: 4 Top of Section Depth(m): 690.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (1-11), 1B (12-25), 1C (25-40), 1D (40-54),
1E (54-60), 2 (63-76), 3 (80-90), 4 (95-99),
5 (104-112), 6 (116-127), 7 (130-138);
Texture : PLAG-CPX-OL MODERATLEY PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS, GLASS SELVAGES ARE PARTLY
ALTERED TO SMEC, GLASS ZONES ARE PRESENT IN
PCES 1A (1-3CM) + 2 (64-69CM) + 4 (95CM)
+5 (95-98CM) + 7 (132-134);
Structure : SCATTERED VEINLETS ARE FILLED WITH SMEC AND
CARBONATE AND ZEOLITE (?), PROMINENT VEINS ARE
PRESENT IN PCES 1E (56CM) + 2 (72CM) + 6 (120CM),
PILLOW BASALT;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CARB
Groundmass : FINE-GRAINED TO GLASSY GNDMASS;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): TO 5
FRESH PHENOS;
Replacement: CLINOPYROXENE ( 1-2%)
Size(mm): TO 3
Phenocrysts: FRESH PHENOS;
OLIVINE ( 1%)
Size(mm): TO 1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS ALSO IS
FOUND IN VEINS AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
ZEOLITE
ID UNCERTAIN BUT MAY BE PRESENT IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/ 800 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 692.80
Core: 62 Top of Core Depth (m) : 686.00
Sect: 5 Top of Section Depth(m): 692.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (2-15), 2A (19-30), 2B (29-36), 3 (40-54),
4 (57-77);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, FINE-GRAINED
GNDMASS;
Structure : SCATTERED VEINS ARE FILLED WITH CALCITE AND SMEC;
Alteration : SLIGHTLY
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 2-5%)
Size(mm): <3
FRESH PHENOS AND ABUNDANCE IS DECREASING DOWNWARD;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH PHENOS;
Replacement: CALCITE
IN VEINS AND ALSO AN IRREGULAR PATCH OCCURS
IN PCE 3;
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 691.45
Core: 63 Top of Core Depth (m) : 690.00
Sect: 1 Top of Section Depth(m): 690.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-16), 1B (16-28), 2 (32-36), 3 (39-50),
4 (53-61), 5 (64-74), 6 (77-93), 7 (97-110),
8A (113-127), 8B (127-144);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS, GLASS SELVAGES ARE PARTLY ALTERED
TO SMEC + CALCITE + ZEOLITE (?);
Structure : PILLOW BASALT, SCATTERED VEINS ARE FILLED WITH
SMEC + CALCITE + ZEOLITE (?), PROMINENT VEINS
ARE IN PCES 1A (7CM) + 1B (20CM) + 4 (61CM)
+ 7 (104CM) + 8A (123CM) + 8B (131CM), ROCK IS
RELATIVELY MASSIVE AND MODERATELY VEINED;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): <1 Percent: 0.5
Location: Filling: CALCITE,SMEC
Groundmass : FINE-GRAINED TO GLASSY GNDMASS;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): <5
FRESH PHENOS;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS
AND VESICLES;
CALCITE
IN VEINS + VESICLES ALSO REPLACES GLASS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VEINS AND REPLACING
GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1000 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 692.50
Core: 63 Top of Core Depth (m) : 690.00
Sect: 2 Top of Section Depth(m): 691.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-20), 2 (23-42), 3A (46-54), 3B (54-69),
3C (70-86);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY ZONES ARE ALTERED TO SMEC
AND ZEOLITE (?) AND ARE FOUND IN PCES 1 AT 2CM AND
3D (100CM);
Structure : PILLOW BASALT, ROCK APPEARS RELATIVELY MASSIVE,
QUARTZ BEARING VUG IN PCES 3A+3B (55CM), A VEIN OF
QUARZ AND MINOR SMEC WITH VOIDS INTO WHICH
SMALL PRISMS OF QTZ XTLS PROTRUDE ALSO DOLOMITE (?)
XTLS ARE PRESENT, SCATTERED VEINS FILLED WITH CARB
AND SMEC;
Alteration : EXTENSIVELY;
52-56CM;
SLIGHTLY
WHOLE SECTION EXCEPT 52-56CM;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): <4
FRESH PHENOS;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH PHENOS;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS ALSO FOUND
IN VEINS;
CARBONATE
IN VEINS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT AS AN ALTERATION OF
GLASS;
DOLOMITE
IN VEIN NEAR VUG IN PCES 3A+3B BUT ID NOT CERTAIN;
QUARTZ
IN VUG AND VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 694.50
Core: 63 Top of Core Depth (m) : 690.00
Sect: 3 Top of Section Depth(m): 693.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-9), 2 (14-23), 3 (26-34), 4 (36-49),
5A (53-64), 5B (64-78), 6 (81-97), 7A (101-110),
7B (110-116), 8 (120-129), 9 (133-146);
Texture : PLAG-CPX-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
GLASSY MARGINS ARE ALMOST TOTALLY ALTERED TO SMEC
AND MINOR PINK ZEOLITE (?) AND ARE OFTEN BRECCIATED,
GLASSY ZONES ARE IN PCES 3 AT 33CM + 4 (38CM) +5A
(64CM) + 5B (66CM) + 7B (117CM) + 8 (120-130CM) +
9 (134CM);
Structure : PILLOW BASALT, SCATTERED VEINS ARE FILLED WITH
CALCITE AND SMEC, HIGHLY FRACTURED NEARLY BRECCIATED
PCES 1+4+5A+5B;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: CALCITE,SMEC
RARE VESICLES;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <3
FRESH PHENOS;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH PHENOS AND A LARGE MEGACRYST OCCURS IN
PCE 6;
OLIVINE ( <1%)
Size(mm): <1
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS ALSO FOUND
IN VEINS AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN GLASSY MARGINS;
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 695.95
Core: 63 Top of Core Depth (m) : 690.00
Sect: 4 Top of Section Depth(m): 694.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC TO PHYRIC BASALT;
Piece No. : PCE 1 (2-20), 2 (24-33), 3 (36-45), 4A (49-57),
4B (57-63), 5 (66-80), 6 (84-91), 7 (94-104),
8 (107-113), 9A (116-127), 9B (127-141);
Texture : PLAG-CPX-OL MODERATELY PHYRIC TO PHYRIC, GNDMASS
IS FINE-GRAINED, POSSIBLE GLASSY MARGIN OCCURS IN
PCE 9B BUT IS NOW ALTERED TO SMEC, THE BASALT IS
BRECCIATED FROM PCES 6-9B AND ESPECIALLY PCE 7 AND
THE LARGE FRAGMENTS ARE CEMENTED BY A MATRIX OF
SMEC (PROBABLY AFTER GLASS) AND MINOR ZEOLITE (?);
Structure : SCATTERED VEINS ARE FILLED WITH SMEC AND CALCITE;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE
Groundmass : PLAGIOCLASE
PLAG NEEDLES ARE PRESENT;
FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <3
FRESH EUHEDRAL PHENOS INCREASING IN ABUNDANCE
DOWNWARD IN THE SECTION;
CLINOPYROXENE ( 1%)
FRESH PHENOS;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND MAY BE REPLACING A GLASSY
MARGIN THAT IS TOTALLY SMEC ALSO SMEC IS FOUND IN
VEINS AND VESICLES;
CALCITE
IN VEINS AND VESICLES;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN CEMENT MATRIX;
Leg : 53 Top/Bottom Interval(mm): 50/1200 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 697.20
Core: 63 Top of Core Depth (m) : 690.00
Sect: 5 Top of Section Depth(m): 696.05
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1 (6-18), 2 (21-32), 3A (35-50), 3B (51-66),
4A (70-85), 4B (85-104), 4C (104-119);
Texture : PLAG-CPX-OL PHYRIC, FINE-GRAINED TO GLASSY GNDMASS,
ONE GLASSY MARGIN OCCURS IN PCE 1 (6CM) AND IS
COMPLETELY ALTERED TO SMEC;
Structure : SCATTERED VEINLETS CONTAIN SMEC + CALCITE WITH
MINOR ZEOLITE (?) AND PYRITE, ROCK IS RELATIVELY
MASSIVE;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH PHENOS WITH ONE SPINEL INCLUSION;
OLIVINE ( <<1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 3%)
Size(mm): <2
FRESH PHENOS;
SPINEL
ONE INCLUSION IN PLAG PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS;
CALCITE
IN VEINLETS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN VEINLETS;
PYRITE
MINOR AMOUNT IN VEINLETS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst:
Hole: 418A Sample Midpoint (m) : 697.00
Core: 64 Top of Core Depth (m) : 695.50
Sect: 1 Top of Section Depth(m): 695.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (1-15), 1B (15-26), 1C (26-40), 1D (40-60),
1E (60-76), 1F (76-93), 1G (93-110), 1H (110-123),
1I (123-135), 1J (135-143), 1K (142-149);
Texture : PLAG-OL PHYRIC, FINE-GRAINED TO SUBOPHITIC GNDMASS
WHICH IS ALSO HOLOXTLN;
Structure : SCATTERED VEINS CONTAIN SMEC + CARBONATE AND MINOR
PYRITE;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: <1
Location: Filling: CARBONATE
Groundmass : FINE-GRAINED TO SUBOPHITIC AND HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <6
FRESH PHENOS;
OLIVINE ( 1%)
Size(mm): <2
FRESH PHENOS;
Replacement: SMECTITE
IN VEINS;
CARBONATE
IN VESICLES AND VEINS;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 698.50
Core: 64 Top of Core Depth (m) : 695.50
Sect: 2 Top of Section Depth(m): 697.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC TO PHYRIC BASALT;
MASSIVE AND PILLOW BASALT;
Piece No. : PCE 1A (2-16), 1B (16-34), 1C (34-44), 1D (51-70),
1E (70-84), 1F (84-98), 1G (98-115), 1H (115-123),
1I (123-131), 1J (131-145), 1K (145-150);
Texture : PLAG-OL MODERATELY PHYRIC TO PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS OCCUR IN PCES 1H
AND 1I AND IN PCES 1J+1K AND ARE MOSTLY FRESH WITH
SOME PLAG AND RARE FRESH OL PHENOS;
Structure : MASSIVE BASALT PCES 1A-1H, PILLOW BASALT PCES 1I-1K,
RELATIVELY THICK VEINS OCCUR IN PCES 1E+1F+1G AND
CONTAIN SMEC + CALCITE + SILICA + MINOR PYRITE;
Alteration : SLIGHTLY
PCES 1A-1H;
MODERATELY
PCES 1I-K;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: <1 Filling: SMEC,CALCITE
Groundmass : FINE-GRAINED TO GLASSY;
SMEC OCCURS IN GNDMASS IN UPPER PART OF
SECTION;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <6
FRESH PHENOS;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
OCCURS IN UPPER PART OF SECTION AND IN VEINS AND
VESICLES;
CALCITE
IN VESICLES AND IN VEINS;
SILICA
IN VEINS;
PYRITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 699.90
Core: 64 Top of Core Depth (m) : 695.50
Sect: 3 Top of Section Depth(m): 698.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (3-15), 1B (16-20), 1C (20-37), 1D (37-51),
1E (51-56), 1F (56-70), 1G (70-85), 1H (85-95),
1I (95-110), 1J (110-127), 1K (127-140);
Texture : PLAG-OL-CPX PHYRIC, FINE-GRAINED TO GLASSY
GNDMASS WITH FRESH GLASS SELVAGES, GLASS MARGINS
ARE IN PCES 1B+1C+1E+1F, BRECCIATION WITH A SMEC
AND CALCITE MATRIX (FORMER GLASSY ?) MAY BE
PRIMARY BRECCIATION (?) IN PCE 1K;
Structure : SCATTERED VEINLETS ARE FILLED WITH SMEC + CALCITE
AND PYRITE, A VUG FILLED WITH SMEC + CALCITE +
QUARTZ + OPAL(?) FROM RIM TO CENTER IN PCE 1J;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 2
Location: Filling: SMEC,CALCITE
Location: Filling: PYRITE
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <3
FRESH PHENOS THAT SOMETIMES FORM GLOMEROCRYSTS,
AND PHENOS ARE EUHEDRAL;
OLIVINE ( 1-3%)
Size(mm): <2
PARTLY ALTERED TO SMEC HIGHER ABUNDANCE OCCURS
IN PCES 1F-1K;
CLINOPYROXENE ( <1%)
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS ALSO FOUND IN VUG + VESICLES
AND IN VEINLETS AND ALSO AS A MATRIX FOR BRECCIA;
CALCITE
IN VEINLETS AND IN VUGS AND VESICLES AND ALSO IN
MATRIX OF BRECCIA;
PYRITE
FOUND IN VEINLETS;
QUARTZ
IN VUG IN PCE 1J;
OPAL
IN VUG IN PCE 1J;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 701.50
Core: 64 Top of Core Depth (m) : 695.50
Sect: 4 Top of Section Depth(m): 700.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (3-17), 2A (21-32), 2B (32-45), 2C (45-54),
2D (54-66), 2E (66-83), 2F (83-98), 2G (98-108),
2H (108-120), 2I (120-137), 2J (136-149);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS IS VERY
FINE-GRAINED TO GLASSY AND SLIGHTLY COARSER-GRAINED
IN LOWER PART OF THE SECTION, GLASS SELVAGES ARE
PARTLY ALTERED TO SMEC + CALCITE AND ZEOLITE (?)
AND IS IN PCES 2A+2E+2F, BRECCIATED ZONES OCCUR
IN PCES 1+2A+2B+2I;
Alteration : MOD;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : VERY FINE-GRAINED TO GLASSY GNDMASS GETTING
COARSER DOWNWARDS IN THE SECTION;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <6
FRESH PHENOS;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <<1%)
RARE ANHEDRAL PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS;
CALCITE
REPLACES GLASS;
ZEOLITE
ID UNCERTAIN MAY REPLACE GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 702.90
Core: 64 Top of Core Depth (m) : 695.50
Sect: 5 Top of Section Depth(m): 701.50
LITHOLOGY: PLAG-CPX MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (2-21), 2A (24-41), 2B (41-59), 2C (60-75),
2D (75-91), 2E (91-104), 2F (105-121), 2G (123-140);
Texture : PLAG-CPX MODERATELY PHYRIC, GNDMASS IS MEDIUM-
GRAINED AND SUBOPHITIC AND HOLOXTLN, PROBABLY
MICROCRYSTALLINE;
Structure : VEINS CONTAIN SMEC AND CALCITE;
Alteration : MOD;
MINOR BROWN STAINING ALONG OXIDIZED VEINS;
Comments : MEDIUM TO DARK GRAY BASALT, LOWER HALF OF SECTION
EXHIBITS MINOR BRECCIATION;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CALCITE
Groundmass : PLAGIOCLASE
NETWORK OF MICROPHENOS PRESENT;
MEDIUM-GRAINED AND SUBOPHITIC AND HOLOXTLN;
Phenocrysts: PLAGIOCLASE ( 4-8%)
Size(mm): <4
EUHEDRAL AND FRESH PHENOS;
CLINOPYROXENE ( <1%)
Size(mm): <1
EUHEDRAL AND FRESH PHENOS;
Replacement: SMECTITE
IN VESICLES AND VEINS;
CALCITE
IN VESICLES AND VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1120 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 704.12
Core: 64 Top of Core Depth (m) : 695.50
Sect: 6 Top of Section Depth(m): 703.00
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-16), 1B (15-20), 1C (20-26), 2A (27-34),
2B (33-38), 2C (38-44), 2D (44-51), 2E (51-67),
3A (69-84), 3B (85-102), 3C (102-110);
Texture : PLAG MODERATELY PHYRIC, FINE-GRAINED TO GLASSY
GNDMASS, GLASSY MARGINS ARE PARTLY ALTERED TO SMEC
AND ARE FOUND IN PCES 1C+2C+2D, MINOR BRECCIA OCCURS
IN PCES 1A+1B AND THE BASALT FRAGMENTS ARE SET IN A
MATRIX OF SMEC AND CALCITE;
Alteration : SLIGHTLY TO MODERATELY;
Comments : MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <5
FRESH PHENOS;
Replacement: SMECTITE
REPLACES GLASS AND IS PART OF BRECCIA MATRIX;
CALCITE
MATRIX COMPONENT OF BRECCIA;
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 706.58
Core: 65 Top of Core Depth (m) : 705.10
Sect: 1 Top of Section Depth(m): 705.10
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-6), 2A (8-21), 2B (20-34), 2C (33-41),
2D (41-51), 3A (52-71), 3B (71-82), 4A (84-93),
4B (92-97), 5 (99-103), 6A (105-111), 6B (111-118),
6C (118-126), 6D (126-132), 7 (134-136),
8 (136-146);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS IS FINE-
GRAINED TO GLASSY, GLASSY MARGINS ARE PARTLY
ALTERED TO SMEC AND ZEOLITE (?) AND ARE OFTEN
BRECCIATED, GLASSY MARGINS ARE FOUND IN PCES 1+2A
(8CM) + 2D (49CM) + 3A (53CM) + 4B (96CM) AND PCES
5+6A+6B+6C+6D (105-131CM) + 7 + 8 (139-143),
BRECCIATED UPPER AND LOWER MARGIN OF A PILLOW IN
PCES 3A+4B;
Structure : LARGE VEINS CONTAIN CALCITE AND SMEC IN PCES
1B+4A+4B, PILLOW BASALT;
Alteration : MOD
MINOR BROWN STAINING ALONG OXIDIZED VEINS;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: <
Location: 1 Filling: CALCITE,SMEC
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 4-8%)
Size(mm): <4
FRESH PHENOS THAT BECOME LESS ABUNDANT IN THE
CENTER OF THE PILLOWS;
OLIVINE ( 1%)
Size(mm): <1
PARTLY ALTERED TO SMEC BUT FRESH IN GLASSY
MARGINS;
CLINOPYROXENE ( <1%)
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND IN VEINS AND VESICLES;
CALCITE
IN VESICLES AND VEINS;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1500 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 708.10
Core: 65 Top of Core Depth (m) : 705.10
Sect: 2 Top of Section Depth(m): 706.60
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-10), 2 (12-15), 3 (17-20), 4 (23-34),
5A (36-39), 5B (40-43), 5C (44-56), 5D (56-72),
5E (72-87), 5F (87-97), 5G (97-107), 5H (107-111),
5I (111-120), 6 (123-130), 7 (133-147);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS ARE PARTLY
BRECCIATED AND PARTLY ALTERED TO SMEC AND ZEOLITE
(?), GLASSY MARGINS IN PCES 1+2+4+5H+5I PILLOW
BASALT, LARGE VEINS CONTAINING CALCITE AND SMEC
OCCUR IN PCES 5E+5I+7;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <4
FRESH PHENOS AND MOST ABUNDANCE IS IN PILLOW RIMS;
OLIVINE ( <1%)
ALTERED TO SMEC EXCEPT IN GLASSY MARGINS;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASS ALSO FOUND IN VEINS
ALSO LARGE IRREGULAR PATCHES OF SMEC OCCUR IN
PCE 5D;
CALCITE
IN VEINS AND ALSO IRREGULAR PATCHES OCCUR IN
PCE 5D;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN GLASS;
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 709.58
Core: 65 Top of Core Depth (m) : 705.10
Sect: 3 Top of Section Depth(m): 708.10
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-10), 1B (10-18), 2 (21-27), 3 (30-39),
4A (41-49), 4B (49-53), 4C (53-61), 4D (61-73),
4E (73-81), 4F (81-92), 4G (92-101), 5A (105-112),
5B (113-123), 5C (123-129), 5D (129-141);
Texture : PLAG-OL MODERATELY PHYRIC, LOWER 50CM OF SECTION IS
BRECCIATED WITH BASALT CLASTS IN A MATRIX OF SMEC
AND MINOR ZEOLITE (?) AND THE AMOUNT OF CEMENT IS
IMPORTANT IN PCE 5C AND MATRIX IS PROBABLY AFTER
BRECCIATED GLASS, GLASSY MARGINS ARE ALTERED TO
SMEC AND ZEOLITE (?) AND ARE IN PCES 1B+3 AND IN
PCES 4A+4B;
Structure : PILLOW BASALT, THICK VEINS OF CALCITE IN PCES
1A+4C+4D, THICK VEINS OF CALCITE + SMEC ARE IN PCES
4F+4G, HIGHLY CRACKED PCE 4C;
Alteration : SLIGHTLY;
Comments : MEDIUM TO DARK GRAY BASALT;
Phenocrysts: PLAGIOCLASE ( 2-7%)
Size(mm): <3
FRESH PHENOS THAT DECREASE IN ABUNDANCE FROM 6-7%
IN PCE 3 TO 2-3% IN PCE 4G ABUNDANCE INCREASES
IN PCES 5A-5D;
OLIVINE ( <1%)
Size(mm): <1
PARTLY ALTERED TO SMEC AND MINOR ZEOLITE;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND IN VEINS AND MATRIX OF
BRECCIA BASALT;
CALCITE
IN VEINS;
ZEOLITE
Minerals Replaced: OL
REPLACES OL PHENOS AND IN BRECCIA MATRIX BUT ID IS
UNCERTAIN;
Leg : 53 Top/Bottom Interval(mm): 0/ 700 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 710.30
Core: 65 Top of Core Depth (m) : 705.10
Sect: 4 Top of Section Depth(m): 709.60
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-11), 1B (11-21), 1C (21-29), 2 (31-38),
3 (41-50), 4A (52-60), 4B (60-70);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, APHANITIC TO GLASSY
GNDMASS, THIS PART OF SECTION IS FINE-GRAINED,
GLASSY MARGINS IN PCES 3+4A+4B ARE TOTALLY ALTERED
TO SMEC, SMEC + ZEOLITE BRECCIA ZONE OCCURS IN
PCE 1C;
Alteration : MOD;
Comments : GRAY TO GREENISH-GRAY BASALT;
Groundmass : APHANITIC TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 3-8%)
Size(mm): TO 5
FRESH BUT PARTLY ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): TO 3
FRESH PHENOS;
OLIVINE ( <<1%)
Size(mm): TO 1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
PLAG AND OL PHENOS REPLACED BY SMEC ALSO THE
GLASSY MARGINS ARE REPLACED BY SMEC AND IS
ALSO IN BRECCIA ZONE OF PCE 1C;
ZEOLITE
IN BRECCIA ZONE OF PCE 1C;
Leg : 53 Top/Bottom Interval(mm): 700/1450 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 711.05
Core: 65 Top of Core Depth (m) : 705.10
Sect: 4 Top of Section Depth(m): 710.30
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCE 5A (71-81), 5B (81-91), 5C (91-106),
5D (106-121), 5E (121-137);
Texture : BASALTIC BRECCIA HAS THE MINERALOGICAL CONTENT OF
CORE 65-4 INTERVAL 0-70CM, THE FRAGMENTS RANGE IN
SIZE FROM <1MM TO 10CM AND ARE IN A MATRIX OF SMEC
+ CALCITE + MINOR ZEOLITE (?);
Leg : 53 Top/Bottom Interval(mm): 0/1420 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 712.52
Core: 65 Top of Core Depth (m) : 705.10
Sect: 5 Top of Section Depth(m): 711.10
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-20), 1B (20-28), 2 (30-34), 3A (37-45),
6B (100-115), 6C (115-123), 6D (124-128),
7 (130-141);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, FINE-GRAINED TO
GLASSY GNDMASS, GLASSY MARGINS IN PCES 2+6+7 AND
ALMOST COMPLETELY ALTERED TO SMEC AND MINOR
ZEOLITE (?), MINOR BRECCIA OCCURS IN PCES 1A+4+5+6
WHICH CONSISTS OF ANGULAR FRAGMENTS OF XTLN BASALT
THAT RANGE IN SIZE FROM 1MM TO 10MM IN A MATRIX OF
SMEC AND CALCITE;
Alteration : SLIGHTLY
SMALL ANGULAR FRAGMENTS OF SMEC IN THE BRECCIA
ARE PROBABLY ALTERED GLASS;
Comments : MEDIUM TO DARK GRAY BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE ( 2-7%)
Size(mm): <3
FRESH PHENOS THAT ARE LESS ABUNDANT AT TOP OF THE
SECTION THAN AT THE BASE;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH PHENOS;
OLIVINE ( <1%)
Size(mm): <1
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND GLASSY MARGINS ALSO IN
VEINS AND VESICLES AND MATRIX OF BRECCIA;
ZEOLITE
ID UNCERTAIN MAY BE PRESENT IN GLASSY MARGINS;
CALCITE
IN VEINS AND MATRIX OF BRECCIA;
Leg : 53 Top/Bottom Interval(mm): 0/1050 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 713.65
Core: 65 Top of Core Depth (m) : 705.10
Sect: 6 Top of Section Depth(m): 712.60
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (3-18), 2 (20-35), 3 (37-47), 4 (51-103);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, APHANITIC GNDMASS;
Structure : SCATTERED VEINS ARE FILLED WITH SMEC AND CALCITE,
ROCK IS RELATIVELY MASSIVE;
Alteration : FRESH;
Comments : MEDIUM TO DARK GRAY BASALT;
Groundmass : APHANITIC;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): <4
FRESH PHENOS;
CLINOPYROXENE ( 1%)
Size(mm): <4
FRESH PHENOS;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS AND IS IN VEINS;
CALCITE
IN VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1300 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 715.90
Core: 66 Top of Core Depth (m) : 714.60
Sect: 1 Top of Section Depth(m): 714.60
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-12), 1B (11-20), 1C (21-28), 2 (32-34),
3 (38-47), 4A (50-64), 4B (64-77), 5 (79-91),
6 (95-102), 7A (106-121), 7B (122-130);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GLASSY MARGINS
ALTERED TO SMEC AND MINOR MORDENITE IN PCES (2,3,6,
7A), PCES 7A-B ARE BRECCIATED;
Structure : CRACKS ARE ABUNDANT IN SECTION AND FILLED WITH SMEC
AND MINOR CALCITE, PILLOW BASALT;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( 6-8%)
Size(mm): <3
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PATCH IN PCE 4A;
MORDENITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 717.57
Core: 66 Top of Core Depth (m) : 714.60
Sect: 2 Top of Section Depth(m): 716.10
LITHOLOGY: PLAG-OL-CPX MODERATELY TO PHYRIC BASALT;
Piece No. : PCE 1A (2-16), 1B (16-31), 1C (31-47), 2A (51-66),
2B (67-76), 2C (76-82), 3 (84-97), 4 (102-115),
5 (118-123), 6 (125-132), 7 (135-147);
Texture : PLAG-OL-CPX MODERATELY TO PHYRIC, GNDMASS APHANITIC,
BRECCIA IN PCE 1A WITH SMEC CEMENT, GLASS ZONES IN
PCES (2C,3,5,6), ALL GLASS ALTERED TO SMEC EXCEPT
A LITTLE IN PCES 5-6;
Structure : PROMINENT VEINS FILLED WITH CALCITE + SMEC + ZEOLITE
IN PCES (1C,7);
Alteration : SLIGHTLY;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE
SOME FILLED WITH CARB + PYRITE;
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE ( 5-15%)
Size(mm): <5
FRESH;
CLINOPYROXENE ( 1%)
Size(mm): <4
FRESH;
OLIVINE ( <1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: PYRITE
TRACE;
SMECTITE
Minerals Replaced: OL
CALCITE
ZEOLITE
Leg : 53 Top/Bottom Interval(mm): 0/1440 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 719.04
Core: 66 Top of Core Depth (m) : 714.60
Sect: 3 Top of Section Depth(m): 717.60
LITHOLOGY: PLAG-OL-CPX MODERATELY TO PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-10), 1B (11-17), 1C (17-25), 2 (29-41),
3 (44-47), 4A (49-62), 4B (63-70), 4C (72-82),
5A (85-92), 5B (92-103), 5C (103-115),
5D (116-122), 6A (126-135), 6B (135-144);
Texture : PLAG-OL-CPX MODERATELY TO PHYRIC, GLASS ZONES IN
PCES (3,4A,5D,6A), GLASS COMPLETELY ALTERED TO SMEC
EXCEPT FOR SOME GLASS IN PCES 5D-6A;
Structure : PROMINENT SMEC VEIN IN PCES 1A-C, OCCASIONAL SMEC
AND MINOR CALCITE VEINS, PILLOW BASALT;
Alteration : MOD;
Vesicles : VERY RARE;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <5
FRESH;
CLINOPYROXENE ( 1-2%)
Size(mm): <5
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
TRACE;
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 720.55
Core: 66 Top of Core Depth (m) : 714.60
Sect: 4 Top of Section Depth(m): 719.10
LITHOLOGY: PLAG-OL-PYX MODERATELY TO PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-17), 2A (22-29), 2B (28-39), 2C (39-53),
3A (55-68), 3B (68-83), 4 (86-95), 5A (100-108),
5B (109-114), 6A (118-128), 6B (128-138),
6C (139-145);
Texture : PLAG-OL-PYX MODERATELY TO PHYRIC, GLASSY MARGIN
ALTERED TO SMEC AND MINOR MORDENITE IN PCES (2C,3B),
PCES (3A-B, 4-5A, 6C) ARE BRECCIATED AND MADE OF
ANGULAR FRAGMENTS CEMENTED WITH SMEC, PCE 3B
CONTAINS A CENTRAL GLASSY ZONE WHICH IS A PILLOW
MARGIN;
Structure : VEIN OF CALCITE + SMEC IN PCE 2B, PILLOW BASALT;
Alteration : MOD;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <4
FRESH;
PYROXENE ( <2%)
Size(mm): <2
IN SUBOPHITIC CLOTS WITH PLAG, FRESH;
OLIVINE
RARE, ALTERED TO SMEC;
Replacement: PYRITE
TRACES IN GNDMASS;
SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
MORDENITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 722.07
Core: 66 Top of Core Depth (m) : 714.60
Sect: 5 Top of Section Depth(m): 720.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-12), 1B (13-23), 2A (28-38), 3 (41-49),
4A (54-67), 4B (67-80), 4C (80-91), 5 (94-107),
6A (112-122), 6B (122-132), 6C (132-137),
6D (137-147);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS APHANITIC, BRECCIA IN
PCES (1A-3), GLASSY ZONES PCES (4A,5,6A), GLASS
COMPLETELY ALTERED TO SMEC;
Structure : PROMINENT VEINS IN PCES 4B-C;
Alteration : MOD;
Vesicles : Size(mm): Percent: RARE
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
FRESH, USUALLY 0.5-2.0 MM;
CLINOPYROXENE ( <1%)
Size(mm): <3
FRESH, MUCH LESS THAN PREVIOUS SECTIONS;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: PYRITE
TRACE IN GNDMASS;
SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 723.50
Core: 66 Top of Core Depth (m) : 714.60
Sect: 6 Top of Section Depth(m): 722.10
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-17), 1B (17-33), 2 (38-50), 3 (53-60),
4 (62-70), 5 (73-81), 6A (83-92), 6B (92-105),
7 (108-124), 8 (128-140);
Texture : PLAG-CPX PHYRIC, PCES (2,4,6B) ARE BRECCIATED,
FRAGMENTS OF BASALT ARE ROUNDED AND IN CEMENT OF
SMEC AND MINOR CALCITE + MORDENITE, SMEC ZONES ARE
ALTERATION OF GLASS, GLASSY MARGINS IN PCES (3,5,
6A-B);
Structure : VEINS FILLED WITH CALCITE + SMEC ARE NOT ABUNDANT,
PILLOW BASALT;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( <10%)
FRESH;
CLINOPYROXENE ( <2%)
Size(mm): <2
FRESH;
Replacement: PYRITE
IN GNDMASS;
CALCITE
SMECTITE
Minerals Replaced: GLASS
MORDENITE
Leg : 53 Top/Bottom Interval(mm): 0/ 420 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 724.02
Core: 66 Top of Core Depth (m) : 714.60
Sect: 7 Top of Section Depth(m): 723.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (4-16), 1B (16-29), 2 (34-42);
Texture : PLAG-CPX-OL PHYRIC;
Structure : PROMINENT VEIN OF SMEC + CALCITE IN PCES 1-2;
Alteration : SLIGHTY;
Comments : THIS SECTION IS CORE CATCHER;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
CLINOPYROXENE ( <1%)
Size(mm): <3
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 725.56
Core: 67 Top of Core Depth (m) : 724.10
Sect: 1 Top of Section Depth(m): 724.10
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-19), 1B (20-29), 2A (32-49), 2B (50-64),
2C (65-79), 2D (80-96), 2E (96-110), 2F (110-115),
3A (118-134), 3B (135-146);
Texture : PLAG-CPX-OL PHYRIC, GLASS ZONES IN PCE 2E-3A, GLASS
IS FRESH;
Structure : PROMINENT VEINS FILLED WITH CALCITE + SMEC AND MINOR
PYRITE IN PCES (1A,2C,2D,3B), MASSIVE;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <8
FRESH, USUALLY 0.5-2.0MM, VERY RARE SPINEL
OCTAHEDRA ENCLOSED IN PLAG;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH;
OLIVINE ( <1%)
Size(mm): <2
ALTERED TO SMEC, MORE ABUNDANT THAN PREVIOUS CORE;
SPINEL
Replacement: PYRITE
TRACE IN GNDMASS;
SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1350 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 726.95
Core: 67 Top of Core Depth (m) : 724.10
Sect: 2 Top of Section Depth(m): 725.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1 (2-12), 2 (15-34), 3A (38-51), 3B (52-67),
3C (68-82), 3D (87-102), 3E (103-117), 3F (118-135);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED,
SUBOPHITIC, GLASSY MARGIN IN PCES 1-2 PARTLY
ALTERED TO SMEC;
Structure : VEINS OF CARB + SMEC IN 3B-D, LOWER PART OF UNIT
FROM PCE 2-3F IS A FLOW;
Alteration : SLIGHTLY
Vesicles : RARE, FILLED WITH CARB OR SMEC;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH, IN SUBOPHITIC RELATIONSHIP WITH PLAG;
Replacement: PYRITE
IN GNDMASS;
SMECTITE
Minerals Replaced: OL
PATCHES IN BOTTOM OF PCE 3E TO TOP OF 3F;
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 728.57
Core: 67 Top of Core Depth (m) : 724.10
Sect: 3 Top of Section Depth(m): 727.10
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1 (3-17), 2A (22-39), 2B (40-56), 2C (57-67),
3A (72-77), 3B (79-93), 3C (94-106), 3D (107-123),
4 (126-131), 5 (134-147);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED, OPHITIC,
GLASSY MARGINS IN PCES 3A-B AND 5 ALTERED TO SMEC
BUT PARTLY FRESH;
Structure : TOP OF SECTION TO PCE 3A MAY BE BOTTOM OF FLOW IN
CORE 67-2, VERY FEW VEINS FILLED WITH CALCITE +
SMEC;
Alteration : MOD
ALTERATION RESTRICTED TO GLASSY MARGINS AND OL
AND ALONG VEINS;
Groundmass : PLAGIOCLASE
FRESH NEEDLES;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <5
EUHEDRAL, FRESH;
CLINOPYROXENE ( 2%)
Size(mm): <3
FRESH, IN OPHITIC RELATIONSHIP WITH PLAG;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: PYRITE
TRACE IN GNDMASS;
CALCITE
SMECTITE
Minerals Replaced: OL,GLASS
Leg : 53 Top/Bottom Interval(mm): 0/ 380 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 728.98
Core: 67 Top of Core Depth (m) : 724.10
Sect: 4 Top of Section Depth(m): 728.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1 (3-11), 2 (17-28), 3 (33-38);
Texture : PLAG-CPX-OL PHYRIC, GLASS ZONE IN PCE 1 IS FRESH,
GLASS ZONE IN PCE 3 ALTERS TO SMEC + ZEOLITE +
OPAL;
Structure : VEIN OF SMEC IN PCE 2 (1CM WIDE), SOME PYRITE IN
VEINS;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
FRESH, 0.5-2.0MM USUALLY;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
IN GNDMASS;
OPAL
ZEOLITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 730.57
Core: 68 Top of Core Depth (m) : 729.10
Sect: 1 Top of Section Depth(m): 729.10
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1 (2-12), 2A (15-32), 2B (32-44), 2E (43-48),
2D (48-65), 2E (65-70), 2F (72-85), 2G (85-101),
2H (101-115), 2I (115-131), 3 (135-138),
4 (141-148);
Texture : PHYRIC, GLASSY MARGINS IN PCE 2E+2F+2I+3+4;
Structure : VEINS OF CALCITE + SMEC + PYRITE OCCUR IN PLACES
IN INTERIOR OF GLASSY MARGINS, VEIN OF PYRITE 1.5MM
THICK IN GLASSY MARGIN IN PCE 2F;
Alteration : FRESH
GNDMASS MODERATELY ALTERED, FRESH OL + GLASS
ONLY IN MARGINS;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC,CALC,ZEOLITE
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <5
CLINOPYROXENE ( 3%)
Size(mm): <4
SUBHEDRAL TO ANHEDRAL;
OLIVINE ( 2%)
Size(mm): <3
EUHEDRAL, ALTERED;
Replacement: SMECTITE
FILLS VEINS + VESICLES;
ZEOLITE
RADIAL-FIBROUS-POSSIBLY NATROLITE FILLS VESICLES;
CALCITE
FILLS VEINS + VESICLES;
PYRITE
FILLS VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1380 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 731.98
Core: 68 Top of Core Depth (m) : 729.10
Sect: 2 Top of Section Depth(m): 730.60
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
Piece No. : PCE 1A (2-14), 1B (14-17), 1C (17-30), 1D (28-35),
1E (35-50), 1F (50-59), 1G (58-63), 1H (63-70),
2 (72-75), 3A (77-86), 3B (86-104), 3C (104-115),
3D (115-121), 3E (121-131), 3F (131-138);
Texture : PHYRIC, GLASSY MARGINS IN PCES 3A + 3F, COOLING UNIT
3A-3F IS LESS PHYRIC - ABOUT 10 PERCENT;
Structure : VEINS ARE FILLED WITH SMEC + CALCITE + PYRITE;
Alteration : FRESH;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC,CALC,PYRITE
Groundmass : MICROCRYSTALLINE, INTERSERTAL WITH A LOOSE NETWORK
OF CRYSTALS, ALTERED TO CALCITE OR PYRITE;
Phenocrysts: PLAGIOCLASE (12-15%)
Size(mm): <4
EUHEDRAL, FRESH;
CLINOPYROXENE ( 3%)
Size(mm): <2
EUHEDRAL TO SUBHEDRAL, TRANSPARENT GREEN CRYSTALS,
OPTIC POSITIVE, HIGH DISPERSION, MORE IN PCE 3;
OLIVINE
COMPLETELY ALTERED TO SMEC, SOME CPX PHENOS MAY BE
OL;
Replacement: CALCITE
REPLACES GNDMASS, FILLS VESICLES + VEINS;
SMECTITE
Minerals Replaced: OL
FILLS VESICLES + VEINS;
PYRITE
REPLACES GNDMASS, FILLS VESICLES + VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/ 710 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 732.81
Core: 68 Top of Core Depth (m) : 729.10
Sect: 3 Top of Section Depth(m): 732.10
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-15), 2A (18-29), 2B (29-38), 3A (40-54),
3B (54-63), 3C (61-71);
Texture : PHYRIC PILLOW BASALT, GLASSY MARGINS WITH FRESH
GLASS IN PCES 1+2B+3A, BRECCIA IN GLASSY MARGINS
CONTAIN SOME PINK MORDENITE + SMEC + CALCITE;
Alteration : FRESH;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC,CALC,PYRITE
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
OLIVINE ( 2%)
Size(mm): <3
ALTERED;
CLINOPYROXENE ( 2%)
Size(mm): <5
Replacement: SMECTITE
FILLS VESICLES, FOUND IN GLASSY MARGIN BRECCIA;
CALCITE
FILLS VESICLES, FOUND IN GLASSY MARGIN BRECCIA;
PYRITE
FILLS VESICLES;
MORDENITE
PINK, FOUND IN GLASSY MARGIN BRECCIA;
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 735.06
Core: 69 Top of Core Depth (m) : 733.60
Sect: 1 Top of Section Depth(m): 733.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (2-18), 1B (18-28), 1C (27-42), 1D (42-60),
1E (60-76), 1F (76-89), 1F1 (89-94), 1G (94-103),
1H (103-112), 2A (115-123), 2B (123-133),
2C (134-146);
Texture : PLAG-OL-CPX PHYRIC, GLASSY MARGINS ARE IN PCES (1A,
1H,2A,2B), CEMENT OF GLASSY MARGINS AND BRECCIA
CONSISTS OF CALCITE + SMEC AND PINK MORDENITE;
Structure : VERY THIN VEINS (0.5MM) OF CARB + SMEC AND SOME
PYRITE;
Alteration : MOD;
Comments : PCES 2A-B ARE INCLUSIONS OF ALTERED SEDIMENT
BETWEEN GLASSY MARGINS, GLASS IS RATHER FRESH BUT IN
CONTACT WITH SEDIMENT IS BADLY ALTERED TO PALAG AND
SMEC;
Vesicles : Size(mm): 1 Percent:
Location: Filling: CALCITE,SMEC,
Location: Filling: PYRITE
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <7
INCREASES NEAR GLASSY MARGINS;
CLINOPYROXENE ( 5%)
Size(mm): <4
MOSTLY EUHEDRAL;
OLIVINE
ALTERED TO CARB + SMEC;
Replacement: PYRITE
ABUNDANT, IN GNDMASS (2-3MM);
SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Minerals Replaced: OL
MORDENITE
PALAGONITE
Minerals Replaced: GLASS
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 736.58
Core: 69 Top of Core Depth (m) : 733.60
Sect: 2 Top of Section Depth(m): 735.10
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (2-8), 1B (10-12), 2A (15-24), 2B (25-32),
2C (32-50), 2D (50-65), 2E (65-67), 2F (68-82),
2G (82-100), 2H (100-110), 2I (110-120),
2J (120-137), 2K (137-148);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS INTERSERTAL, FINE-
GRAINED, CPX + OL PHENOS CONTENT INCREASES IN PCES
2C-K;
Alteration : MOD;
Vesicles : Size(mm): 1 Percent: <1
Location: Filling: CALCITE
Shape : ROUND
Groundmass : PLAGIOCLASE
BELOW 2C;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <3
FRESH, EUHEDRAL;
OLIVINE ( 3%)
Size(mm): <2
MOSTLY REPLACED BY SMEC AND OR CALCITE;
CLINOPYROXENE ( 2%)
Size(mm): <3
FRESH, EUHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 738.07
Core: 69 Top of Core Depth (m) : 733.60
Sect: 3 Top of Section Depth(m): 736.60
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (4-13), 1B (14-29), 1C (29-38), 1D (38-47),
1E (46-57), 2A (61-70), 2B (71-82), 2C (82-88),
2D (89-104), 2E (104-112), 2F (112-119),
3A (122-137), 3B (137-143), 3C (143-148);
Texture : PLAG-OL-CPX PHYRIC, GLASSY MARGINS IN PCES (1E,2A,
2B,2F,3A,3C);
Structure : FRACTURES FILLED WITH CALCITE + SMEC + PYRITE,
VEINLETS OCCUR BOTH IN GLASSY MARGINS AND INTERIORS
OF PILLOWS;
Alteration : SLIGHTLY;
Comments : PCE 1E UPSIDE DOWN (GLASSY MARGIN ON BOTTOM);
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE,SMEC,
Location: Filling: PYRITE
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
CLINOPYROXENE ( 2%)
Size(mm): <4
OLIVINE ( 2%)
Size(mm): <3
ALTERED TO CALCITE + SMEC;
Replacement: CALCITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: OL
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 739.50
Core: 69 Top of Core Depth (m) : 733.60
Sect: 4 Top of Section Depth(m): 738.10
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-16), 2 (19-28), 3 (32-36), 4 (39-53),
5 (56-62), 6A (65-80), 6B (81-87), 7 (89-101),
8 (103-107), 9 (110-122), 10 (124-140);
Texture : PLAG-OL-CPX PHYRIC, GLASSY MARGINS IN PCES (1-4,6B-
10), BRECCIA BETWEEN GLASSY MARGINS CONSISTS OF
GLASSY FRAGMENTS COMPLETELY ALTERED TO SMEC, GNDMASS
NEAR MARGINS (<10CM) IS GLASSY BUT ALTERED, IN GLASS
MARGINS GLASS IS FRESH, BRECCIA CEMENT CONSISTS OF
SMEC + CALCITE + MORDENITE;
Structure : VEINS FILLED WITH SMEC + CALCITE + MORDENITE,
PILLOW BASALT;
Alteration : MOD
ALTERATION ALONG FRACTURES;
Comments : ALTERED SEDIMENT IN PCES 3 AND 7 CONSISTING OF
QUARTZ + ZEOLITE + CALCITE + SMEC;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
CLINOPYROXENE ( 1-2%)
Size(mm): <4
OLIVINE ( 2%)
Size(mm): <3
Replacement: SMECTITE
Minerals Replaced: GLASS
CALCITE
Minerals Replaced: GLASS
MORDENITE
Minerals Replaced: GLASS
PINK;
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 741.06
Core: 69 Top of Core Depth (m) : 733.60
Sect: 5 Top of Section Depth(m): 739.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (3-14), 1B (15-23), 2A (27-40), 2B (42-53),
3 (42-53), 4 (62-65), 5 (67-73), 6 (76-88),
7A (90-100), 7B (100-112), 7C (112-115),
8A (118-131), 8B (132-146);
Texture : PLAG-CPX-OL PHYRIC, MICROCRYSTALLINE TO INTERSERTAL;
Alteration : SLIGHTLY;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <4
EUHEDRAL, FRESH;
CLINOPYROXENE ( 3%)
Size(mm): <2
EUHEDRAL, FRESH;
OLIVINE ( <2%)
REPLACED BY CALCITE + SMEC + PYRITE;
Replacement: CALCITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: OL
PYRITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1390 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 742.49
Core: 69 Top of Core Depth (m) : 733.60
Sect: 6 Top of Section Depth(m): 741.10
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (1-18), 2A (22-37), 2B (37-54), 2C (55-70),
3A (73-90), 3B (90-106), 4A (109-122),
4B (122-135), 4C (135-139);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS CRYPTOCRYSTALLINE, GLASS
ZONE IN PCE 4C ALTERED TO SMEC;
Structure : VEINS CONTAIN SMEC + CALCITE + PYRITE, MASSIVE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: RARE
Groundmass : PLAGIOCLASE
NEEDLES VISIBLE;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <5
FRESH, GENERALLY 0.5-2MM;
OLIVINE ( 2%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <3
EUHEDRAL, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/ 650 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 743.25
Core: 69 Top of Core Depth (m) : 733.60
Sect: 7 Top of Section Depth(m): 742.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-13), 2 (17-22), 3A (27-35), 3B (36-47),
4A (51-58), 4B (59-65);
Texture : PLAG-CPX-OL PHYRIC, GLASSY MARGINS PCES (1,3A)
PARTLY ALTERED TO SMEC;
Structure : FEW VEINS FILLED WITH SMEC, PILLOW BASALT;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <3
FRESH;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH;
OLIVINE ( 1%)
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 744.58
Core: 70 Top of Core Depth (m) : 743.10
Sect: 1 Top of Section Depth(m): 743.10
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (1-15), 1B (14-21), 1C (21-30), 1D (30-46),
1E (46-53), 2A (55-71), 2B (72-90), 2C (90-102),
2D (101-119), 2E (120-133), 2F (133-148);
Texture : PHYRIC PILLOW BASALT, INTERSERTAL TO
MICROCRYSTALLINE GNDMASS;
Alteration : FRESH TO MOD;
Vesicles : Size(mm): <0.1 Percent: <1
Location: Filling: CALCITE
Shape : ROUND
Groundmass : INTERSERTAL TO MICROCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <2
EUHEDRAL, FRESH;
OLIVINE ( 2-4%)
Size(mm): <1
EUHEDRAL AND SUBHEDRAL, MOSTLY REPLACED BY
SMEC AND OR CALCITE SOMETIMES WITH PYRITE;
CLINOPYROXENE ( 2-4%)
EUHEDRAL AND SUBHEDRAL, FRESH LIGHT GREEN,
TRANSPARENT, VERY DIFFICULT TO DIFFERENTIATE FROM
FRESH OL;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
FILLS VESICLES;
PYRITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 746.08
Core: 70 Top of Core Depth (m) : 743.10
Sect: 2 Top of Section Depth(m): 744.60
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-18), 1B (18-32), 1C (32-47), 1D (47-63),
2C (108-120), 2D (119-124), 2E (124-137),
2F (136-148);
Texture : PHYRIC PILLOW BASALT WITH RATHER FRESH GLASSY
MARGINS IN PCES 1F+2A+2F THAT ARE ALTERED ALONG
CRACKS, FINE-GRAINED GNDMASS;
Structure : PCE 2 IS MORE ALTERED AND HAS MORE CRACKS AND THIN
SMEC VEINS, CARBONATE VEINS IN PCES 1A+1B+1C+1D+2B;
Alteration : FRESH
PCE 1;
EXT
PCE 2;
Vesicles : Size(mm): 1 Percent: <1
Groundmass : FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <7
OLIVINE ( 3-4%)
Size(mm): <3
ALTERED;
CLINOPYROXENE ( 2%)
Size(mm): 3-4
Replacement: CARBONATE
SMECTITE
BOTH FILL VEINS;
PYRITE
FILLS VEINS, OCCURS IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 747.58
Core: 70 Top of Core Depth (m) : 743.10
Sect: 3 Top of Section Depth(m): 746.10
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (1-11), 1B (11-17), 1C (17-31), 1D (31-45),
1E (46-53), 1F (52-69), 1G (69-76), 1H (77-86),
1I (87-98), 2A (101-107), 2B (109-116),
2C (118-126), 3A (132-141), 3B (142-148);
Texture : PHYRIC;
Structure : FREQUENT VEINS FILLED WITH SMEC + CALCITE +
ZEOLITE + FE.HYDROX;
Alteration : MOD
PCE 1+3;
EXT
PCE 2;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALC,PYRITE
Phenocrysts: PLAGIOCLASE ( 8-12%)
Size(mm): <4
EUHEDRAL, SLIGHTLY ALTERED;
CLINOPYROXENE ( 2%)
Size(mm): <4
SERIATE, LARGE PHENOS FOUND ONLY IN LOWER PART,
FRESH TO SLIGHTLY ALTERED;
OLIVINE ( <1%)
Size(mm): <1
EUHEDRAL TO SUBHEDRAL;
Replacement: SMECTITE
FILLS VESICLES + VEINS;
CALCITE
FILLS VESICLES + VEINS;
ZEOLITE
FILLS VEINS;
FERROUS HYDROX MINS
FILLS VEINS;
PYRITE
FILLS VESICLES;
Leg : 53 Top/Bottom Interval(mm): 0/ 950 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 748.55
Core: 70 Top of Core Depth (m) : 743.10
Sect: 4 Top of Section Depth(m): 747.60
LITHOLOGY: PLAG-OL-CPX SPARSELY PHYRIC TO APHYRIC BASALT;
Piece No. : PCE 1A (2-19), 1B (17-29), 1C (29-44), 1D (44-58),
1E (58-71), 2 (73-76), 3A (78-92), 3B (92-95);
Texture : SPARSELY PHYRIC TO APHYRIC, NEAR GLASSY MARGIN AT
TOP OF PCE 1A IT IS MODERATELY PHYRIC UP TO 15%;
Alteration : FRESH TO MOD;
Vesicles : Size(mm): Percent: 5-7
Location: Filling: CALC,SMEC,PYRITE
ALSO FILLED WITH SILICA, INCREASE WITH DEPTH;
Phenocrysts: PLAGIOCLASE
OLIVINE
CLINOPYROXENE
CONTENT OF PHENOS DECREASE WITH DEPTH WITH PCE 3A
BEING ALMOST APHYRIC BUT GRAINSIZE INCREASES;
Replacement: CALCITE
SMECTITE
SILICA
PYRITE
ALL FILL VESICLES;
Leg : 53 Top/Bottom Interval(mm): 950/1480 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 749.08
Core: 70 Top of Core Depth (m) : 743.10
Sect: 4 Top of Section Depth(m): 748.55
LITHOLOGY: PLAG-OL-CPX SPARSELY PHYRIC TO APHYRIC BASALT;
Piece No. : PCE 3B (95-105), 4A (107-123), 4B (123-136),
4C (136-148);
Texture : VERY FINE-GRAINED ALMOST APHYRIC BASALT, GRAIN SIZE
INCREASES TO PCE 4B AND THEN GRADUALLY DECREASES;
Structure : THIN VEINS FILLED WITH SMEC + PYRITE OCCUR IN THE
WHOLE SECTION AND ALSO CUT ACROSS THE CONTACT IN
PCE 3B;
Alteration : FRESH;
Comments : THIS WHOLE SECTION IS A DIKE;
Vesicles : Size(mm): <3 Percent: 3-5
Location: Filling: CALC,SMEC,PYRITE
ALSO FILLED WITH SILICA;
Phenocrysts: PLAGIOCLASE ( 2-3%)
OLIVINE ( 1%)
CLINOPYROXENE ( 1%)
ALL IN PCE 4B;
Replacement: CALCITE
FILLS VESICLES;
SILICA
FILLS VESICLES;
SMECTITE
FILLS VESICLES + VEINS;
PYRITE
FILLS VESICLES + VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/ 120 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 749.22
Core: 70 Top of Core Depth (m) : 743.10
Sect: 5 Top of Section Depth(m): 749.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (2-5), 2A (9-12);
Texture : TEXTURALLY AND MINERALOGICALLY SIMILAR TO 70-4
INTERVAL 95-148CM;
Comments : DIKE;
Leg : 53 Top/Bottom Interval(mm): 120/1490 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 750.59
Core: 70 Top of Core Depth (m) : 743.10
Sect: 5 Top of Section Depth(m): 749.22
LITHOLOGY: SPARSELY PHYRIC TO APHYRIC BASALT;
Piece No. : PCE 2A (12-24), 2B (24-36), 2C (36-44), 2D (44-52),
2E (53-67), 2F (68-80), 2G (81-88), 3 (92-106),
4A (107-117), 4B (117-127), 4C (127-136),
4D (137-149);
Texture : SPARSELY PHYRIC TO APHYRIC, GRAIN SIZE DECREASES
WITH DEPTH IN PCES 2A-3, PCE 4A IS GLASSY MARGIN
WITH FRESH AND PARTLY ALTERED GLASS, PCE 4A-4B ARE
AN APHANITIC PILLOW, IN BRECCIATED GLASSY MARGINS
THERE ARE FRAGMENTS BOTH OF GLASS AND CRYSTALLINE
APHYRIC BASALT, CEMENT CONSISTS OF SMEC + CALCITE;
Structure : THIN VEINS FILLED WITH SMEC AND CRACKS IN THE
PILLOW;
Alteration : FRESH
PCES 2A-3;
MOD
PCE 4;
Vesicles : Size(mm): Percent: 1-4
CONTENT DECREASES WITH DEPTH, PCES 2A-3;
Replacement: SMECTITE
FILLS VEINS, FOUND AS CEMENT IN BRECCIA;
CALCITE
FOUND AS CEMENT IN BRECCIA;
Leg : 53 Top/Bottom Interval(mm): 0/ 710 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 751.31
Core: 70 Top of Core Depth (m) : 743.10
Sect: 6 Top of Section Depth(m): 750.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (2-22), 1B (22-36), 1C (36-47), 2 (49-58),
3 (61-71);
Texture : PHYRIC;
Structure : MODERATELY ALTERED VEINS CONTAIN CALCITE + SMEC +
MORDENITE + FE. HYROXIDES;
Alteration : FRESH
TOP OF PCE 1A IS MOD;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): 4
EUHEDRAL, SLIGHTLY WEATHERED;
CLINOPYROXENE ( 3-5%)
EUHEDRAL, GREEN-TRANSPARENT, FRESH;
OLIVINE ( 1%)
MOSTLY REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
FILLS VEINS + VESICLES;
CALCITE
FILLS VEINS + VESICLES;
FERROUS HYDROX MINS
FILLS VEINS;
MORDENITE
FILLS VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1360 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 754.06
Core: 71 Top of Core Depth (m) : 752.70
Sect: 1 Top of Section Depth(m): 752.70
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
BRECCIA BASALT;
Piece No. : PCE 1 (3-9), 2A (13-21), 2B (21-29), 2C (28-36),
3 (39-43), 4A (46-55), 4B (55-65), 4C (66-74),
5A (76-85), 5B (86-92), 5C (92-103), 5D (102-113),
5E (113-120), 5F (120-126), 6 (131-136);
Texture : PHYRIC BRECCIATED BASALT WITH GLASSY MARGINS IN PCES
1+2A+4C+5F PARTLY ALTERED TO SMEC, BRECCIA
CEMENT IS MADE OF CALCITE IN PCES 4A+5C+5D AND
SMEC IN PCES 2A+2B+2C+5A+5F;
Alteration : MOD;
Comments : PCE 1 IS A PCE OF BASALT SAME AS REST OF SECTION
WITH A SMALL PCE OF CHERT ATTACHED;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: CALCITE,SMEC
Groundmass : SULFIDES
FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <3
FRESH LATHS;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH;
OLIVINE ( 2%)
Size(mm): <1
RARELY FRESH, USUALLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
PARTLY REPLACES GLASSY MARGINS, FILLS VESICLES,
FOUND AS BRECCIA CEMENT;
SULFIDES
FOUND IN GNDMASS;
CALCITE
FILLS VESICLES, FOUND AS CEMENT IN BRECCIA;
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 755.68
Core: 71 Top of Core Depth (m) : 752.70
Sect: 2 Top of Section Depth(m): 754.20
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-8), 1B (6-14), 1C (15-22), 1D (22-31),
1E (32-39), 1F (38-51), 1G (51-58), 1H (59-64),
1I (65-72), 2 (78-82), 3 (87-91), 4A (95-104),
4B (105-115), 4C (116-122), 4D (122-129),
5A (132-141), 5B (142-148);
Texture : PLAG-CPX-OL PHYRIC, GLASS ZONES IN PCES (1A,1I,2,3),
GLASS ZONES FRESH TO PARTIALLY ALTERED;
Structure : INFREQUENT VEINLETS OF CALCITE + SMEC AND SOME MINOR
PYRITE, PILLOW BASALT;
Alteration : SLIGHTLY;
Vesicles : Size(mm): 0.5 Percent: <1
Location: Filling: CARB,SMEC
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): 0.5-4
OCCASIONAL MEGACRYSTS TO 8MM, FRESH, EUHEDRAL;
OLIVINE ( <1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 1-2%)
Size(mm): <2
FRESH, EUHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 757.17
Core: 71 Top of Core Depth (m) : 752.70
Sect: 3 Top of Section Depth(m): 755.70
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-9), 2 (14-17), 3A (22-33), 3B (33-44),
3C (43-50), 4A (52-63), 4B (63-68), 5 (75-78),
6A (83-92), 6B (93-98), 7 (102-109), 8A (113-121),
8B (119-127), 8C (127-136), 8D (136-147);
Texture : PLAG-CPX-OL PHYRIC, GLASSY MARGINS ALTERED TO SMEC
IN PCES (1-3A, 5-7);
Structure : PCE 6A SHOWS CONTACT BETWEEN TWO NEIGHBORING
PILLOWS, TOP OF SECTION (PCES 1-4B) IS HIGHLY
FRACTURED AND FILLED WITH SMEC, PROMINENT VEINS OF
CALCITE IN PCES 7-8A AND OF CALCITE + SMEC IN PCE
4B, PILLOW BASALT;
Alteration : SLIGHTLY;
Comments : A PCE OF CHERT IS ATTACHED TO BOTTOM OF PCE 8D;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
FRESH;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
IN GNDMASS;
NEAR CONTACT PATCHES OF SECONDARY MINERALS LIKE
SMEC + CALCITE AND IS CONTINUED IN CORE 71-4;
Leg : 53 Top/Bottom Interval(mm): 0/1420 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 758.62
Core: 71 Top of Core Depth (m) : 752.70
Sect: 4 Top of Section Depth(m): 757.20
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-11), 1B (11-21), 1C (21-27), 1D (28-34),
1E (35-44), 1F (45-53), 1G (53-59), 2 (62-68),
3 (72-81), 4 (84-93), 5 (97-102), 6 (105-115),
7A (117-127), 7B (127-136), 7C (136-142);
Texture : PLAG-CPX-OL PHYRIC, GLASS MARGINS IN PCES (16, 2-6),
GLASS IS FRESH TO PARTLY ALTERED WITH ABUNDANT SMEC
IN PCE 3;
Structure : RELATIVELY ABUNDANT VEINLETS FILLED WITH CALCITE +
SMEC AND ZEOLITE, PARTICULARLY PROMINENT VEINLETS IN
PCES (1C-D, 4-6, 7C), PILLOW BASALT;
Alteration : MOD;
Comments : CHERT AND MINOR CARB ON TOP OF PCE 1A CONTINUOUS
WITH BOTTOM OF SECTION 5, ALSO ONE FRAGMENT IN PCE
2, PROBABLY REPRESENTS SEDIMENT MIXED UP WITH FLOW
DURING ERUPTION;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 8-12%)
Size(mm): 0.3-5
FRESH, EUHEDRAL;
CLINOPYROXENE ( 2-3%)
Size(mm): <3
FRESH, EUHEDRAL TO SUBHEDRAL;
OLIVINE ( <1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
ZEOLITE
PYRITE
TRACES IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 760.26
Core: 72 Top of Core Depth (m) : 758.80
Sect: 1 Top of Section Depth(m): 758.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (4-5), 2A (9-19), 2B (19-27), 2C (28-38),
2D (38-45), 2E (46-53), 2F (54-63), 2G (63-70),
2H (70-77), 2I (77-82), 2J (82-88), 3 (93-103),
4 (105-111), 5A (114-123), 5B (124-131),
5C (132-139), 5D (139-146);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED, GLASSY
MARGINS IN PCES (2E-F, 3,4) ALTERED TO SMEC;
Structure : FRACTURES FILLED WITH SMEC ABUNDANT IN PCES 2A-J,
PILLOW BASALT;
Alteration : MOD;
Comments : PCE 3 CONTAINS A FRAGMENT OF SEDIMENT (CHERT)
INTERBEDDED IN SMEC AFTER GLASS;
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE (12-15%)
Size(mm): <5
EUHEDRAL, FRESH;
CLINOPYROXENE ( 3%)
Size(mm): <3
FRESH, SOME IN SUBOPHITIC CLOTS WITH PLAG;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
IN GNDMASS;
PCE 2A AT TOP SHOWS PATCHES OF SMEC AND MINOR
CALCITE;
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 761.78
Core: 72 Top of Core Depth (m) : 758.80
Sect: 2 Top of Section Depth(m): 760.30
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC;
PILLOW BASALT;
Piece No. : PCE 1A (2-11), 1B (12-19), 1C (20-27), 1D (27-32),
1E (32-41), 1F (42-51), 1G (51-57), 2 (63-66),
3A (69-79), 3B (79-88), 3C (89-97), 4 (99-113),
5A (115-122), 5B (122-128), 5C (128-142),
5D (142-148);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, GNDMASS APHANITIC,
GLASS ZONES IN PCES (1A,1G,2,3A) ARE FRESH TO PARTLY
ALTERED;
Structure : PCES 1A-F CONTAIN NUMEROUS CALCITE + SMEC VEINS,
PYRITE OCCURS IN SOME VEINLETS, PILLOW BASALT;
Alteration : MOD;
Comments : FRAGMENT OF TAN CHERT IN PCE 1D;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): 0.3-4
FRESH, EUHEDRAL;
CLINOPYROXENE ( 1-2%)
Size(mm): <4
FRESH, SUBHEDRAL;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
DISSEMINATED IN GNDMASS (1%);
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 763.26
Core: 72 Top of Core Depth (m) : 758.80
Sect: 3 Top of Section Depth(m): 761.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (2-15), 1B (14-27), 2 (31-37), 3A (41-58),
3B (59-73), 3C (74-84), 3D (84-92), 3E (92-97),
3F (97-102), 4A (105-118), 4B (118-123),
5 (126-136), 6 (140-146);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED, NEAR
GLASSY MARGINS (PCES 4B,5) GNDMASS CONSISTS OF
GLASS (ALTERED), BETWEEN GLASSY MARGINS IS ALTERED
BRECCIA;
Structure : A PINK MORDENITE VEIN IS IN THE ZONE NEAR THE GLASSY
MARGIN IN PCE 5;
Alteration : MOD;
Comments : SMALL LENS OF CHERT IN PCE 5;
Vesicles : Size(mm): <2 Percent: 1-2
Location: Filling: CALCITE,SMEC
Groundmass : PLAGIOCLASE
MICROLITES;
CLINOPYROXENE
OLIVINE
GLASS
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <10
USUSALLY 4MM;
CLINOPYROXENE ( 2-3%)
Size(mm): <4
OLIVINE ( 1-2%)
Size(mm): <3
ALTERED TO SMEC + CALCITE;
Replacement: PYRITE ( 0.5%)
IN GNDMASS;
SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
MORDENITE
Leg : 53 Top/Bottom Interval(mm): 0/1310 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 764.61
Core: 72 Top of Core Depth (m) : 758.80
Sect: 4 Top of Section Depth(m): 763.30
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-13), 1B (14-22), 1C (23-32), 1D (32-38),
1E (38-49), 1F (49-60), 1G (60-69), 2A (72-79),
2B (79-87), 2C (88-93), 3A (96-107), 3B (107-115),
3C (115-123), 3D (123-131);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS IN ZONES NEXT TO GLASSY
MARGINS (PCES 1A-B, 3) CONSISTS MOSTLY ALTERED
GLASS, GLASS IS RATHER FRESH;
Structure : VEINS CONSIST OF CALCITE + QUARTZ + MONT + SMEC,
SOME PYRITE IN VEINS, PILLOW BASALT;
Alteration : MOD;
Vesicles : Size(mm): <2 Percent:
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
CLINOPYROXENE ( 1%)
Size(mm): <4
OLIVINE ( 1-2%)
Size(mm): <3
ALTERED TO SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
PYRITE ( <0.5%)
IN GNDMASS;
MONTMORILLONITE
QUARTZ
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 766.27
Core: 73 Top of Core Depth (m) : 764.80
Sect: 1 Top of Section Depth(m): 764.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-14), 2A (16-26), 2B (26-36), 2C (36-45),
2D (45-51), 2D (50-56), 2F (56-65), 2G (65-72),
2H (72-84), 3A (86-91), 3B (91-100), 3C (100-106),
3D (106-120), 3E (119-122), 3F (122-126),
3G (126-132), 3H (132-137), 4 (139-147);
Texture : PHYRIC PILLOW BASALT, VARIOLITIC-MICROCRYSTALLINE
GNDMASS, GLASSY MARGINS IN PCES 2F+2G+3H+4;
Structure : VEINS CONTAIN SMEC + CARB + ABUNDANT PYRITE;
Alteration : WEAKLY TO MOD;
Vesicles : Size(mm): 1 Percent: <1
Location: Filling: CALCITE
Groundmass : VARIOLITIC TO MICROCRYSTALLINE, POSSIBLY
SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 8-12%)
Size(mm): <7
EUHEDRAL TO SUBHEDRAL, 5-8 PERCENT IN PCE 1,
SLIGHTLY ALTERED, FORMS GLOMEROCRYSTS;
CLINOPYROXENE ( 3%)
Size(mm): <6
OLIVINE ( 1%)
REPLACED BY CALCITE + SMEC;
Replacement: CALCITE
Minerals Replaced: OL
FILLS VESICLES + VEINS;
SMECTITE
Minerals Replaced: OL
FILLS VEINS;
PYRITE
FILLS VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 767.78
Core: 73 Top of Core Depth (m) : 764.80
Sect: 2 Top of Section Depth(m): 766.30
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (1-9), 2 (11-15), 3A (19-34), 3B (24-32),
3C (31-44), 3D (44-50), 3E (50-61), 3F (62-71),
3G (70-77), 3H (77-85), 4 (87-100), 5 (102-105),
6A (106-120), 6B (120-126), 6C (125-140),
6D (140-148);
Texture : PHYRIC PILLOW BASALT WITH GLASSY MARGINS WITH LENSES
OF CHERT AND CALCITE CRYSTALS IN CLAY CEMENT OF
BRECCIA IN PCES 1+2+4;
Structure : VEINS FILLED WITH PYRITE + SMEC + CARB;
Alteration : EXT;
Groundmass : FINE-GRAINED TO GLASSY, MOD TO HIGHLY ALTERED;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <9
CLINOPYROXENE ( 2%)
Size(mm): 4
OLIVINE ( 3%)
Size(mm): 1-2
OL COMPLETELY ALTERED INTO CARB + SMEC;
Replacement: CALCITE
Minerals Replaced: OL
CRYSTALS FOUND IN BRECCIA;
CLAY
FOUND AS CEMENT FOR BRECCIA;
SMECTITE
Minerals Replaced: OL
FILLS VEINS;
PYRITE
FILLS VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1440 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 769.24
Core: 73 Top of Core Depth (m) : 764.80
Sect: 3 Top of Section Depth(m): 767.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-12), 1B (12-20), 2A (22-30), 2B (31-38),
3A (40-50), 3B (50-57), 4 (59-70), 5 (72-81),
6 (82-94), 6B (93-104), 6C (105-111), 6D (111-122),
7 (126-128), 8 (131-144);
Texture : PHYRIC PILLOW BASALT, GNDMASS TEXTURE VARIES FROM
GLASSY-VARIOLITIC-INTERSERTAL TO MICROCRYSTALLINE
WITH SOME PYRITE;
Alteration : SLIGHTLY;
Structure : VEINS FILLED WITH CALCITE + SMEC + PYRITE;
Vesicles : Size(mm): <.2 Percent: <1
Location: Filling: CALC,SMEC,PYRITE
SOMETIMES EMPTY (UPPER PART);
Groundmass : VARIES FROM GLASSY-VARIOLITIC-INTERSERTAL TO
MICROCRYSTALLINE WITH NETWORK OF CRYSTALS,
SOMETIMES FINELY DISTRIBUTED PYRITE;
Phenocrysts: PLAGIOCLASE (12-14%)
Size(mm): <8
EUHEDRAL, GLOMEROCRYSTS COMMON, RARE MEGACRYSTS;
CLINOPYROXENE ( 2-3%)
Size(mm): <2
EUHEDRAL, FRESH;
OLIVINE ( 1%)
Size(mm): <1
EUHEDRAL, REPLACED MOSTLY BY SMEC OR CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
FILLS VESICLES + VEINS;
CALCITE
Minerals Replaced: OL
FILLS VESICLES + VEINS;
PYRITE
REPLACES SOME GNDMASS, FILLS VESICLES + VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1490 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 770.79
Core: 73 Top of Core Depth (m) : 764.80
Sect: 4 Top of Section Depth(m): 769.30
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (1-15), 1B (15-28), 1C (28-36), 1D (36-51),
1E (51-64), 1F (64-76), 1G (75-87), 1H (87-97),
2A (100-111), 2B (111-124), 2C (124-136),
2D (137-149);
Texture : PHYRIC PILLOW BASALT WITH GLASSY MARGINS IN PCES
1C+1D+1H+2A, GLASS IS PARTLY ALTERED BUT IN BRECCIAS
BETWEEN GLASSY MARGINS AND IN ZONES NEAR MARGINS
ALTERATION IS STRONG, FINE-GRAINED TO GLASSY
GNDMASS;
Structure : VEINS FILLED WITH CARBONATE + SMEC + PYRITE;
Alteration : SLIGHTLY TO MOD;
Comments : BASALT IS MEDIUM GRAY;
Groundmass : FINE-GRAINED TO GLASSY, DISSEMINATED PYRITE;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): 10
FRESH;
OLIVINE ( 1-2%)
Size(mm): <3
ALTERED TO SMEC;
CLINOPYROXENE ( 2-3%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
PARTLY REPLACES GLASS SELVAGES, FILLS VEINS;
CARBONATE
FILLS VEINS;
PYRITE
FILLS VEINS, DISSEMINATED IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 772.27
Core: 73 Top of Core Depth (m) : 764.80
Sect: 5 Top of Section Depth(m): 770.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (1-15), 1B (15-29), 1C (30-41), 1D (41-54),
1E (54-69), 1F (70-75), 1G (75-86), 1H (86-96),
1I (96-109), 1J (109-120), 2A (122-135),
2B (135-147);
Texture : PHYRIC BASALT;
Structure : VEINS FILLED WITH CALCITE + SMEC + PYRITE;
Alteration : SLIGHTLY;
Comments : BASALT IS MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC,CALCITE
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <10
FRESH;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH, USUALLY IN SUBOPHITIC CLUSTERS WITH PLAG;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
PARTLY REPLACES GLASS SELVAGES, FILLS VESICLES +
VEINS;
CALCITE
Minerals Replaced: OL
FILLS VESICLES + VEINS;
PYRITE
FILLS VEINS;
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 773.75
Core: 73 Top of Core Depth (m) : 764.80
Sect: 6 Top of Section Depth(m): 772.30
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-8), 1B (8-14), 1C (14-26), 1D (27-38),
2A (41-50), 2B (51-63), 3A (66-75), 3B (75-85),
3C (85-93), 3D (93-100), 3E (100-110), 3F (111-121),
3G (122-134), 4 (136-145);
Texture : PHYRIC PILLOW BASALT WITH PCE 3 PARTLY BRECCIATED,
GLASSY MARGIN IN PCE 4;
Structure : FRACTURES AND VEINS FILLED WITH SILICA + CALCITE +
SMEC + MINOR PYRITE;
Alteration : MOD
0-65CM;
EXT
65-145CM;
Vesicles : Size(mm): <2 Percent: 1
Location: Filling: SMEC
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <8
FRESH;
CLINOPYROXENE ( 3%)
Size(mm): <5
FRESH;
OLIVINE ( 2%)
Size(mm): <3
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
PARTLY REPLACES GLASS SELVAGES, FILLS VESICLES +
VEINS + FRACTURES;
CALCITE
FILLS FRACTURES + VEINS;
PYRITE
MINOR, FILLS FRACTURES + VEINS;
SILICA
FILLS FRACTURES + VEINS;
Comments : BASALT IS MEDIUM GRAY;
Leg : 53 Top/Bottom Interval(mm): 0/ 380 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 774.18
Core: 73 Top of Core Depth (m) : 764.80
Sect: 7 Top of Section Depth(m): 773.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-12), 1B (11-19), 1C (20-31), 1D (31-38);
Texture : PHYRIC PILLOW BASALT;
Structure : VEINS FILLED WITH CALCITE + SMEC;
Alteration : SLIGHTLY;
Comments : BASALT IS MEDIUM TO DARK GRAY;
Groundmass : FINE-GRAINED TO GLASSY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <9
FRESH;
CLINOPYROXENE ( 2%)
Size(mm): <1
FRESH;
OLIVINE ( 1%)
Size(mm): <0.5
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
PARTLY REPLACES GLASS SELVAGES, FILLS VESICLES +
VEINS;
CALCITE
FILLS VESICLES + VEINS;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: SMEC,CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 775.78
Core: 74 Top of Core Depth (m) : 774.30
Sect: 1 Top of Section Depth(m): 774.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-5), 2A (7-14), 2B (14-23), 2C (25-30),
3A (32-48), 3B (50-66), 4A (70-82), 4B (82-95),
4C (96-107), 4D (106-111), 4E (112-128),
5 (131-148);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS VARIES FROM FINE-GRAINED
TO GLASSY IN THE UPPER 30CM TO MEDIUM-GRAINED IN
THE LOWER 120CM, NO GLASS SELVAGES OCCUR BELOW 30CM
AND THE GRAIN SIZE INCREASES GRADUALLY FROM 30CM TO
THE BASE OF THE SECTION, GLASS SELVAGES RELATIVELY
FRESH WITH ONLY MINOR ALTERATION TO SMEC;
Structure : VEINS AND VEINLETS FILLED WITH CALCITE + SMEC AND
MINOR PYRITE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <1.5 Percent: 1
Location: Filling: CALCITE
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <5
SOME MEGACRYSTS TO 10MM, PARTLY ALTERED TO SMEC;
OLIVINE ( 0-1%)
Size(mm): <1
ALTERED TO SMEC, NOT EVENLY DISTRIBUTED;
CLINOPYROXENE ( 1-2%)
Size(mm): <2
SINGLE SUBHEDRAL GRAINS OR IN GLOMEROCRYSTS WITH
PLAG;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
PYRITE
DISSEMINATED IN GNDMASS;
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 777.26
Core: 74 Top of Core Depth (m) : 774.30
Sect: 2 Top of Section Depth(m): 775.80
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-20), 1B (20-36), 1C (36-52), 1D (50-55),
1E (55-62), 1F (60-70), 1C (70-87), 2 (90-107),
3A (110-126), 3B (127-146);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS MEDIUM-GRAINED,
SUBOPHITIC, GRAIN SIZE INCREASING GRADUALLY WITH
DEPTH;
Structure : SCATTERED VEINS FILLED WITH CALCITE AND MINOR SMEC
IN PCES 1A-D, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: CALCITE
Shape : ROUND
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <7
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 3%)
Size(mm): <2
FRESH, OFTEN IN GLOMEROPHYRIC CLUSTERS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1420 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 778.72
Core: 74 Top of Core Depth (m) : 774.30
Sect: 3 Top of Section Depth(m): 777.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-14), 1B (15-20), 1C (20-26), 1D (25-34),
1E (35-37), 1F (38-55), 1G (56-63), 1H (62-73),
1I (73-90), 1J (90-106), 1K (107-142);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS MEDIUM-GRAINED;
SUBOPHITIC;
Structure : SPARSE VEINS FILLED WITH CALCITE (PCE 1G-H) AND SMEC
(PCE 1C, 1H), SLICKENSIDES PRESENT ON PCE 1C-D,
MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <0.2 Percent: 1
Location: Filling: CALCITE
Shape : ROUND
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH, ONE MEGACRYST IN PCE 1C IS 25MM ACROSS;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC, EUHEDRAL;
CLINOPYROXENE ( 3%)
Size(mm): <3
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 780.27
Core: 74 Top of Core Depth (m) : 774.30
Sect: 4 Top of Section Depth(m): 778.80
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
MASSIVE, PILLOW;
Piece No. : PCE 1A (2-20), 1B (21-34), 1C (35-43), 2A (46-49),
2B (50-61), 2C (62-70), 3 (72-81), 4 (83-101),
5A (102-113), 5B (114-131), 5C (131-140),
5D (141-147);
Texture : PLAG-OL-CPX PHYRIC, PCE 1 IS CONTINUATION OF MASSIVE
UNIT IN SECTIONS 2-3, REMAINDER OF SECTION CONSISTS
OF PILLOW BASALT, GNDMASS FINE-GRAINED TO GLASSY,
GRAIN SIZE IN PCE 1 DECREASES DOWNWARD TO GLASSY
MARGIN IN PCE 1C, GLASS SELVAGES ARE FRESH;
Structure : SCATTERED VEINLETS FILLED WITH SMEC + CALCITE,
MASSIVE, PILLOW;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
FRESH, EUHEDRAL TO SUBHEDRAL;
OLIVINE ( 1%)
Size(mm): 2
ALTERED TO SMEC + CALCITE;
CLINOPYROXENE ( 2-4%)
Size(mm): 6
FRESH, OFTEN FORMS GLOMEROCRYSTS WITH PLAG;
SUBHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1400 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 781.70
Core: 74 Top of Core Depth (m) : 774.30
Sect: 5 Top of Section Depth(m): 780.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-10), 2 (13-22), 3A (26-43), 3B (42-53)
3C (52-61), 3D (61-67), 4 (71-74), 5 (78-87),
6A (89-96), 6B (97-107), 7 (111-115), 8 (119-128),
9 (132-140);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
GLASS SELVAGES PARTLY ALTERED TO SMEC (PCES 1,4,5,7,
8,9);
Structure : VEINLETS PRESENT THROUGHOUT FILLED WITH SMEC AND
MINOR PYRITE, PILLOW;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY, A PCE OF ALTERED
SEDIMENT OCCURS BETWEEN GLASS SELVAGES IN PCE 4;
Vesicles : Size(mm): <2 Percent: 1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 2-3%)
Size(mm): <4
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
DISSEMINATED IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1420 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 783.22
Core: 74 Top of Core Depth (m) : 774.30
Sect: 6 Top of Section Depth(m): 781.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-17), 1B (17-33), 1C (33-47), 1D (46-55),
2A (58-64), 2B (64-71), 2C (72-80), 2D (79-86),
2E (86-97), 3 (99-103), 4A (105-113), 4B (112-128),
4C (129-142);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
GLASSY SELVAGES PARTLY ALTERED TO SMEC;
Structure : FRACTURES PRESENT THROUGHOUT THE SECTION FILLED WITH
SMEC + CALCITE + PYRITE, PILLOW BASALT;
Alteration : MOD;
Comments : BASALT MEDIUM GRAY TO GREENISH GRAY;
Vesicles : Size(mm): <2 Percent: 1-2
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
FRESH;
OLIVINE ( 1%)
Size(mm): <3
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <3
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/ 210 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 783.51
Core: 74 Top of Core Depth (m) : 774.30
Sect: 7 Top of Section Depth(m): 783.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-12), 2 (14-21);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED;
Structure : CARB FILLS SCATTERED VEINS, PILLOW;
Alteration : MOD;
Comments : BASALT MEDIUM GRAY TO GREENISH GRAY;
Vesicles : Size(mm): <1 Percent: <.5
Location: Filling: CARB
Phenocrysts: PLAGIOCLASE ( 7-8%)
Size(mm): <6
FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <3
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 783.15
Core: 75 Top of Core Depth (m) : 781.70
Sect: 1 Top of Section Depth(m): 781.70
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-9), 2 (12-15), 3A (18-27), 3B (26-34),
3C (35-47), 3D (48-55), 3E (55-71), 3F (71-77),
3G (77-84), 3H (85-98), 4A (102-117), 4B (117-124),
4C (124-132), 4D (132-145);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO GLASSY, GLASS SELVAGES PARTLY ALTERED TO SMEC,
PCE 1 IS BRECCIATED WITH BASALT FRAGMENTS IN A SMEC
MATRIX, GLASS MARGINS IN PCES (2,3A,3D,3E);
Structure : VEINS SCATTERED THROUGHOUT FILLED WITH SMEC, ONE
LARGE VEIN IN PCE 4 FILLED WITH CARB + SMEC + QUARTZ
AND PYRITE, PILLOW BASALT;
Alteration : MOD;
Comments : BASALT MEDIUM GRAY TO GREENISH GRAY;
Phenocrysts: PLAGIOCLASE ( 7-8%)
Size(mm): <6
FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <3
FRESH, MOSTLY IN GLOMEROCRYSTS WITH PLAG;
Replacement: PYRITE
DISSEMINATED IN GNDMASS;
CALCITE
SMECTITE
Minerals Replaced: OL
QUARTZ
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 784.66
Core: 75 Top of Core Depth (m) : 781.70
Sect: 2 Top of Section Depth(m): 783.20
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-12), 1B (9-20), 1C (20-32), 1D (32-42),
1E (42-50), 1F (50-63), 2 (65-73), 3A (74-82),
3B (82-97), 3C (98-112), 3D (113-121), 3E (121-132),
3F (132-137), 3G (137-146);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
GLASS SELVAGES PARTLY ALTERED TO SMEC, MINOR
BRECCIATION IS PRESENT IN PCES (1F,2,3A), BRECCIA
CONSISTS OF ANGULAR BASALT FRAGMENTS IN A SMEC
MATRIX;
Structure : VEINS PRESENT THROUGHOUT FILLED WITH SMEC + CALCITE,
PILLOW BASALT;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <0.5 Percent: <.5
Location: Filling: SMEC,CALCITE
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <8
FRESH, EUHEDRAL TO SUBHEDRAL;
OLIVINE ( <1%)
Size(mm): <0.5
MOSTLY ALTERED TO SMEC + CALCITE, EUHEDRAL;
CLINOPYROXENE ( 4%)
Size(mm): <6
FRESH, EUHEDRAL TO SUBHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/ 880 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 785.58
Core: 75 Top of Core Depth (m) : 781.70
Sect: 3 Top of Section Depth(m): 784.70
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-11), 1B (8-16), 1C (17-21), 2A (24-32),
2B (32-38), 2C (38-52), 2D (52-55), 3 (57-67),
4A (72-84), 4B (85-88);
Texture : PLAG-OL-CPX PHYRIC, PARTLY BRECCIATED WITH ANGULAR
FRAGMENTS IN SMEC MATRIX (PCES 1B, 2C-D, 3,4);
Structure : PILLOW BASALT;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <3
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
Leg : 53 Top/Bottom Interval(mm): 920/1450 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 786.15
Core: 75 Top of Core Depth (m) : 781.70
Sect: 3 Top of Section Depth(m): 785.62
LITHOLOGY: BASALTIC GLASS;
Piece No. : PCE 5 (92-97), 6 (100-106), 7A (108-117),
7B (117-124), 8 (127-135), 9 (140-145);
Texture : PLAG-OL SPARSELY PHYRIC, GLASS IN PCE 6 IS
BRECCIATED;
Alteration : MOD;
Comments : FRAGMENTS OF ALTERED SEDIMENT IN PCE 8 (SMEC +
CALCITE AND CHALCEDONY), GLASS IN PCE 6 BRECCIATED;
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): <5
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1410 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 787.61
Core: 75 Top of Core Depth (m) : 781.70
Sect: 4 Top of Section Depth(m): 786.20
LITHOLOGY: BASALTIC BRECCIA;
PILLOW, FRAGMENTS OF PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (3-11), 1B (12-17), 2 (24-31), 3 (35-40),
4A (42-52), 4B (53-61), 4C (63-73), 4D (74-88),
5 (92-94), 6 (98-104), 7A (106-114), 7B (114-122),
7C (122-127), 7D (128-135), 7E (136-141);
Texture : BRECCIA CONSISTS OF CRYSTALLINE PLAG-OL-CPX PHYRIC
BASALT FRAGMENTS WITH MANY GLASS SELVAGES, GNDMASS
OF BRECCIA FRAGMENTS IS FINE-GRAINED TO GLASSY,
GLASS SELVAGES PARTLY ALTERED TO SMEC, BRECCIA
MATRIX IS GREEN SMEC, INTERSERTAL;
Structure : PILLOW BASALT;
Alteration : MOD
LESS ALTERED BELOW PCE 4B;
Comments : BASALT GRAY TO GREENISH GRAY;
Vesicles : Size(mm): <2 Percent: 1-3
Location: Filling: SMEC,CALCITE
SOME FILLED WITH PYRITE, SOME <8MM;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <6
FRESH, EUHEDRAL;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC + CALCITE;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH, EUHEDRAL TO SUBHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Minerals Replaced: OL
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/ 690 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 788.39
Core: 75 Top of Core Depth (m) : 781.70
Sect: 5 Top of Section Depth(m): 787.70
LITHOLOGY: BASALTIC GLASS;
MASSIVE;
Piece No. : PCE 1 (2-12), 2 (15-25), 3A (28-35), 3B (36-44),
3C (45-52), 3D (52-60), 4 (63-69);
Texture : PLAG-OL MODERATELY PHYRIC, PARTLY BRECCIATED
BRECCIA MATRIX CONSISTS OF SMEC + CALCITE + ZEOLITE;
Structure : PARTLY MASSIVE AND PARTLY BRECCIATED, GLASS PARTLY
MASSIVE;
Alteration : MOD;
Groundmass : PLAGIOCLASE ( 3%)
FRESH MICROLITES;
Phenocrysts: PLAGIOCLASE ( 5-7%)
FRESH;
OLIVINE ( 1%)
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Minerals Replaced: GLASS
ZEOLITE
Minerals Replaced: GLASS
Leg : 53 Top/Bottom Interval(mm): 0/ 190 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 787.29
Core: 76 Top of Core Depth (m) : 787.10
Sect: 1 Top of Section Depth(m): 787.10
LITHOLOGY: BASALTIC GLASS;
Piece No. : PCE 1 (3-6), 2A (8-11), 2B (11-15), 2C (16-19);
Texture : BRECCIATED AS IN CORE 75-6, PLAG-OL-CPX MODERATELY
PHYRIC;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( 2-5%)
Size(mm): <4
OLIVINE ( 1%)
Size(mm): <1
CLINOPYROXENE ( 1%)
Size(mm): <2
Leg : 53 Top/Bottom Interval(mm): 200/1480 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 788.58
Core: 76 Top of Core Depth (m) : 787.10
Sect: 1 Top of Section Depth(m): 787.30
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Piece No. : PCE 2D (20-27), 2E (28-34), 2F (35-40), 26 (40-48),
2H (49-57), 2I (57-62), 2J (62-68), 2K (69-76),
2L (77-84), 2M (85-97), 2N (97-107), 2O (107-120),
2P (120-136), 1G (136-148);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS MEDIUM TO
FINE-GRAINED, OFTEN MOTTLED;
Structure : VEINS FILLED WITH CALCITE + SMEC + QUARTZ + PYRITE;
Alteration : MOD
ALONG VEINS THERE ARE ZONES OF ALTERATION 0.5-1.0
CM WIDE WITH DARK GREEN SMEC IN VESICLES AND
GNDMASS, ALSO PYRITE;
Comments : BASALT GRAY TO GREENISH GRAY;
Vesicles : Size(mm): <2 Percent: 1-2
Location: Filling: CALCITE,SMEC
A FEW <5MM;
Phenocrysts: PLAGIOCLASE ( 2-5%)
Size(mm): <4
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
QUARTZ
PYRITE
DISSEMINATED IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 790.07
Core: 76 Top of Core Depth (m) : 787.10
Sect: 2 Top of Section Depth(m): 788.60
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-10), 1B (10-17), 1C (17-30), 1D (30-39),
1E (39-47), 1F (47-60), 1G (60-72), 1H (72-85),
1I (85-92), 1J (92-100), 1K (100-106), 1L (107-114),
1M (116-124), 1N (125-139), 1O (140-147);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO MEDIUM-GRAINED SUBOPHITIC;
Structure : VEINS FILLED WITH SMEC + CALCITE + PYRITE, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <0.5 Percent: 0.5
Location: Filling: CALCITE,SMEC,
Location: Filling: PYRITE
Phenocrysts: PLAGIOCLASE ( 2-3%)
Size(mm): <3
FRESH, EUHEDRAL, GREENISH, TRANSLUCENT;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1-2%)
Size(mm): <4
FRESH, EUHEDRAL LONG XTLS;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1300 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 791.40
Core: 76 Top of Core Depth (m) : 787.10
Sect: 3 Top of Section Depth(m): 790.10
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-15), 1B (15-23), 1C (24-34), 1D (34-47),
1E (48-63), 1F (63-75), 1G (75-92), 1H (92-98),
1I (98-109), 2 (114-130);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED
HOLOXTLN;
Structure : HIGHLY FRACTURED AND FILLED WITH CALCITE + SMEC, IN
PCE 2 THERE ARE SCHLIEREN OF APHANITIC MATERIAL,
MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Phenocrysts: PLAGIOCLASE ( 3-4%)
Size(mm): <3
FRESH;
OLIVINE ( 1-2%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/ 490 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 793.59
Core: 77 Top of Core Depth (m) : 793.10
Sect: 1 Top of Section Depth(m): 793.10
LITHOLOGY: APHYRIC TO PLAG-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-17), 1B (18-26), 2 (28-38), 3A (42-49);
Texture : PLAG-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
WITH ONE GLASS SELVAGE AT THE BASE OF PCE 3A, GLASS
ALTERED TO SMEC, SOME APHYRIC PARTS, GNDMASS FINER-
GRAINED TOWARD BOTTOM, SUBOPHITIC;
Structure : MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OPAQUE MINERALS
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): <2
FRESH;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH, OFTEN INTERGROWN WITH PLAG IN SUBOPHITIC
CLOTS;
Leg : 53 Top/Bottom Interval(mm): 520/1470 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 794.57
Core: 77 Top of Core Depth (m) : 793.10
Sect: 1 Top of Section Depth(m): 793.62
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCE 3B (52-60), 4 (62-73), 5 (76-90), 6A (92-99),
6B (100-109), 7 (115-125), 8 (127-136), 9 (138-147);
Texture : BRECCIA CONSISTS OF ANGULAR FRAGMENTS 10CM TO <1MM,
FRAGMENTS MADE OF CRYSTALLINE BASALT, MANY HAVE
GLASSY RINDS AND SMALL FRAGMENTS ARE COMPLETELY
GLASS, BRECCIA MATRIX IS GREEN SMEC;
Structure : APPEARS TO BE PILLOW BRECCIA;
Alteration : MOD;
Replacement: SMECTITE
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 796.06
Core: 77 Top of Core Depth (m) : 793.10
Sect: 2 Top of Section Depth(m): 794.60
LITHOLOGY: APHYRIC TO PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-12), 2 (15-28), 3 (31-44), 4A (47-61),
4B (61-65), 5A (67-82), 5B (82-85), 5C (85-100),
5D (100-117), 6A (125-140), 6B (140-146);
Texture : APHYRIC TO PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS
HOLOXTLN, APHANITIC IN PCE 1, FINE-GRAINED IN PCES
2-3 AND MEDIUM-GRAINED SUBOPHITIC IN LOWER 100 CM
OF SECTION;
Structure : SCATTERED VEINLETS FILLED WITH CALCITE + SMEC +
PYRITE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <2 Percent: 5
Location: Filling: CALCITE,SMEC
PCES 4A-5B, AT 70CM STRING OF CALCITE-FILLED
VESICLES UP TO 2MM, BASE OF 4A CONTAINS 5% SMEC-
FILLED(.5MM), IN A FEW CM BECOME CALCITE-FILLED
AND INCREASE 1MM;
Phenocrysts: PLAGIOCLASE ( 2-4%)
Size(mm): <4
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: PYRITE
DISSEMINATED IN GNDMASS;
SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1390 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 797.49
Core: 77 Top of Core Depth (m) : 793.10
Sect: 3 Top of Section Depth(m): 796.10
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-8), 1B (8-15), 2A (17-32), 2B (32-47,
2C (47-65), 2D (65-80), 3A (83-85), 3B (85-100),
3C (100-116), 4A (118-130), 4B (125-139);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLNM
MEDIUM-GRAINED, SUBOPHITIC, PCE 1 IS SLIGHTLY FINER-
GRAINED THAN REST OF SECTION, GLASS MARGINS ABSENT;
Structure : SPARSE VEINLETS FILLED WITH CALCITE + SMEC,
PROMINENT VEIN IN PCE 2A IS FILLED WITH CALCITE,
MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): Percent: 2
Location: Filling: SMEC,CALCITE
PCES (1,2A, 3A-B);
Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE
REST OF SECTION;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <6
FRESH, EUHEDRAL;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1
FRESH, SUBHEDRAL, OFTEN IN SUBOPHITIC CLOTS WITH
PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1370 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 798.97
Core: 77 Top of Core Depth (m) : 793.10
Sect: 4 Top of Section Depth(m): 797.60
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-22), 1B (22-36), 1C (36-50), 1D (52-69),
1E (69-82), 2A (85-104), 2B (105-112), 2C (113-121),
2D (122-129), 2E (128-137);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM-GRAINED, SUBOPHITIC;
Structure : SPARSE VEINLETS FILLED WITH SMEC AND MINOR PYRITE,
MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <3 Percent: 1-3
Location: Filling: SMEC,CALCITE
INCREASE TOWARD BASE OF SECTION, FILLED WITH
CALCITE IN PCES 2D-E AND STRING OF VESICLES IN PCE
2E;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <8
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1380 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 800.48
Core: 77 Top of Core Depth (m) : 793.10
Sect: 5 Top of Section Depth(m): 799.10
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-18), 1B (19-36), 2A (41-56), 2B (56-72),
2C (73-86), 2D (85-97), 2E (98-105), 2F (106-124),
2C (124-138);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC TO INTERSERTAL;
Structure : PROMINENT VEINS IN PCES 2B-C FILLED WITH SMEC +
CALCITE AND PYRITE, SAME UNIT AS SECTION 77-4;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <3 Percent: 1-2
Location: Filling: SMEC,CALCITE
STRING OF VESICLES IN PCE 1B, AMOUNT OF VESICLES
DECREASES TOWARD BOTTOM OF SECTION;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <7
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 802.07
Core: 77 Top of Core Depth (m) : 793.10
Sect: 6 Top of Section Depth(m): 800.60
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-14), 1B (14-20), 2 (23-32), 3 (35-50),
4A (55-61), 4B (62-71), 5A (75-87), 5B (87-96),
6 (102-114), 7 (117-127), 8A (130-134),
8B (134-147);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC, VEIN IN PCE 3
HAS FRAGMENTS <10MM OF BRECCIA;
Structure : PROMINENT VEIN IN PCE 3 FILLED WITH SMEC, VEIN IN
PCE 3 FILLED WITH CARB, SLICKENSIDES PRESENT ON PCES
4B AND 6, SAME FLOW UNIT AS SECTION 77-5, MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <6
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 3%)
Size(mm): <2
FRESH, OFTEN IN GLOMEROPHYRIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/ 210 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 802.31
Core: 77 Top of Core Depth (m) : 793.10
Sect: 7 Top of Section Depth(m): 802.10
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-11), 1B (11-21);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC;
Structure : MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY, ALL IN CORE CATCHER;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC,CALCITE
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <3
FRESH, SOME WITH PLAG IN GLOMEROCRYSTS;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 803.86
Core: 78 Top of Core Depth (m) : 802.40
Sect: 1 Top of Section Depth(m): 802.40
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-7), 2 (12-26), 3A (31-44), 3B (45-60),
3C (60-72), 4A (77-90), 4B (90-103), 5A (106-121),
5B (121-136), 5C (136-146);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC;
Structure : NOTABLE VEINS IN PCES (2A,3B,4B) FILLED WITH CARB
AND SMEC AND MINOR PYRITE, FLOW UNIT SAME AS 77-4,
MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <2 Percent: <1
Location: Filling: CALCITE,SMEC
FILLED ALSO WITH MINOR PYRITE;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <6
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1390 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 805.29
Core: 78 Top of Core Depth (m) : 802.40
Sect: 2 Top of Section Depth(m): 803.90
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-10), 1B (10-26), 1C (26-36), 1D (36-51),
1E (51-60), 1F (60-68), 1G (68-77), 1H (81-98),
1I (99-110), 2A (112-124), 2B (125-139);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC;
Structure : PROBABLY INTERIOR OF A FLOW, SCATTERED VEINLETS
FILLED WITH CALCITE + SMEC, MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <2 Percent: <1
Location: Filling: CALCITE,SMEC
ALSO MINOR PYRITE;
Groundmass : PLAGIOCLASE
Size(mm): <1
LATHS;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <8
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH, SUBHEDRAL, OFTEN IN SUBOPHITIC CLOTS WITH
PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 806.86
Core: 78 Top of Core Depth (m) : 802.40
Sect: 3 Top of Section Depth(m): 805.40
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-17), 1B (18-33), 1C (33-46), 1D (47-50),
2A (52-68), 2B (68-85), 2C (85-100), 2D (100-114),
2E (114-130), 2F (130-146);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC;
Structure : PROMINENT VEINS IN PCES 1-2 FILLED WITH SMEC + CARB
AND MINOR PYRITE, MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <7
FRESH, EUHEDRAL;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 808.37
Core: 78 Top of Core Depth (m) : 802.40
Sect: 4 Top of Section Depth(m): 806.90
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (4-19), 1B (20-36), 1C (34-50), 2A (53-67),
2B (67-75), 2C (76-90), 3A (92-106), 3B (106-121),
3C (122-132), 3D (132-147);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC;
Structure : NOTABLE VEINS IN PCES (1B,2B,3B,3D) FILLED WITH SMEC
AND MINOR PYRITE, SLICKENSIDES PRESENT ON PCES 3A
AND 3D, MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <0.2 Percent: 1
Location: Filling: CALCITE
Shape : ROUND
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <6
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH;
Replacement: PYRITE
IN GNDMASS;
SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1410 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 809.81
Core: 78 Top of Core Depth (m) : 802.40
Sect: 5 Top of Section Depth(m): 808.40
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-19), 1B (20-35), 1C (35-50), 1D (50-65),
1E (65-72), 1F (72-81), 1G (81-94), 2A (101-115),
2B (115-130), 2C (128-141);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC;
Structure : PROMINENT VEINS IN PCES 1G AND 2A FILLED WITH SMEC
AND CALCITE, MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): <6
FRESH, EUHEDRAL;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG;
SUBHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 811.37
Core: 78 Top of Core Depth (m) : 802.40
Sect: 6 Top of Section Depth(m): 809.90
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE
Piece No. : PCE 1 (4-14), 2 (18-30), 3A (33-41), 3B (41-55),
3C (55-69), 3D (69-82), 4 (86-98), 5 (102-107),
6A (111-125), 6B (125-138), 6C (139-147);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC, AMOUNT OF
PHENOS DECREASE TOWARD BOTTOM OF COOLING UNIT;
Structure : PART OF THICK COOLING UNIT, PROMINENT VEINS IN PCES
(2,3A,3C) FILLED WITH CALCITE + SMEC, SLICKENSIDES
PRESENT ON PCE 1, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): <4
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <1
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1010 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 812.41
Core: 78 Top of Core Depth (m) : 802.40
Sect: 7 Top of Section Depth(m): 811.40
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (7-20), 2 (24-37), 3 (42-55), 4 (60-69),
5 (60-70), 6 (85-101);
Texture : PLAG-OL SPARSELY PHYRIC, GNDMASS HOLOXTLN, COARSE-
GRAINED, SUBOPHITIC;
Structure : VERY FEW VEINS FILLED WITH SMEC + CALCITE + PYRITE,
MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): <2 Percent:
Location: Filling: CALCITE
PCE 1, SOME SMEC-FILLED IN PCES (1,3,6);
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): <2
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/ 740 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 812.74
Core: 79 Top of Core Depth (m) : 812.00
Sect: 1 Top of Section Depth(m): 812.00
LITHOLOGY: PLAG-CPX SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (3-6), 2A (9-20), 2B (21-33), 3 (35-48),
4 (50-66), 5 (69-74);
Texture : PLAG-CPX SPARSELY PHYRIC, GNDMASS HOLOXTLN,
MEDIUM-GRAINED, SUBOPHITIC;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY, PCE 1 IS SMALL FRAGMENT
OF ALTERED SEDIMENT PROBABLY SLUMPED INTO THE HOLE;
Vesicles : LARGE VESICLE IN PCE 10 FILLED WITH CARB + SMEC;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
OPAQUE MINERALS
COMPLETELY CRYSTALLIZED AND SMEC-WEATHERED
INTERSTITIAL GLASS;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): <3
CLINOPYROXENE ( <1%)
FRESH;
Replacement: SMECTITE
Minerals Replaced: GLASS
Leg : 53 Top/Bottom Interval(mm): 770/1090 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 813.09
Core: 79 Top of Core Depth (m) : 812.00
Sect: 1 Top of Section Depth(m): 812.77
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 6 (77-81), 7A (83-93), 7B (94-100),
8A (102-109);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY, CHILLED MARGINS PRESENT ON BOTH UPPER AND
LOWER CONTACTS, GLASS IS ALTERED TO SMEC;
Structure : DIKE BASALT THROUGHOUT THIS INTERVAL WITH TWO
CHILLED MARGINS, UPPER MARGIN HORIZONTAL AND LOWER
DIPS 45 DEGREES;
Alteration : MOD;
Comments : BASALT GREENISH GRAY;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): <1
FRESH;
OLIVINE ( 2%)
Size(mm): <1
Replacement: SMECTITE
Minerals Replaced: GLASS
Leg : 53 Top/Bottom Interval(mm): 1090/1470 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 813.47
Core: 79 Top of Core Depth (m) : 812.00
Sect: 1 Top of Section Depth(m): 813.09
LITHOLOGY: PLAG-CPX SPARSELY PHYRIC BASALT;
Piece No. : PCE 8B (109-123), 9 (126-134), 10 (136-147);
Texture : PLAG-CPX SPARSELY PHYRIC, SAME FLOW MINERALOGICALLY
AND TEXTURALLY AS ABOVE WITH DIKE CUTTING THROUGH;
Alteration : SLIGHTLY;
Vesicles : VESICLE IN PCE 10 (1CMX1.25CM) CONTAINS
INTERFACE BETWEEN CARB FILLING AND PYRITE FILLING,
INTERFACE SIMILAR TO MENISCUS (DIPS 15 DEGREES;)
Leg : 53 Top/Bottom Interval(mm): 0/ 720 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 814.22
Core: 79 Top of Core Depth (m) : 812.00
Sect: 2 Top of Section Depth(m): 813.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (4-14), 2 (18-19), 3A (22-37), 3B (38-42),
3C (43-50), 3D (50-62), 3E (62-72);
Texture : APHYRIC, HOLOXTLN, MEDIUM TO COARSE-GRAINED,
SUBOPHITIC, SAME AS INTERVAL 108-138CM, DOLERITE(?);
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE,SMEC
NOT UNIFORMLY DISTRIBUTED;
Replacement: PYRITE
DISSEMINATED IN GNDMASS;
CALCITE
DISSEMINATED IN GNDMASS;
SMECTITE
Leg : 53 Top/Bottom Interval(mm): 750/1080 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 814.58
Core: 79 Top of Core Depth (m) : 812.00
Sect: 2 Top of Section Depth(m): 814.25
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Piece No. : PCE 4A (75-88), 4B (88-101), 4C (101-108);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO GLASSY, GLASSY MARGINS PRESENT ON TOP AND BOTTOM
OF DIKE, GLASS ALTERED TO SMEC;
Structure : SCATTERED VEINLETS FILLED WITH SMEC + PYRITE, THIS
INTERVAL CONSISTS OF DIKE BASALT;
Alteration : MOD;
Comments : BASALT GREENISH GRAY;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <2
FRESH;
OLIVINE ( 3%)
Size(mm): <0.5
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH, GAMMA EQUALS 1.708;
Replacement: SMECTITE
Minerals Replaced: GLASS,OL
PYRITE
Leg : 53 Top/Bottom Interval(mm): 1080/1380 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 814.88
Core: 79 Top of Core Depth (m) : 812.00
Sect: 2 Top of Section Depth(m): 814.58
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 4D (108-122), 4E (123-138);
Texture : MINERALOGICALLY AND TEXTURALLY SIMILAR TO INTERVAL
3-72CM, APHYRIC, GRAINS ARE NOT CEMENTED AND IT
RESEMBLES SANDSTONE, TEXTURE AND GRAIN SIZE UNIFORM;
Alteration : FRESH;
Vesicles : Size(mm): <6 Percent:
Location: Filling: CALCITE
Groundmass : PLAGIOCLASE (55-60%)
SUBHEDRAL;
CLINOPYROXENE ( 20%)
OLIVINE
MAGNETITE ( 10%)
Replacement: SMECTITE
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1100 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 816.10
Core: 79 Top of Core Depth (m) : 812.00
Sect: 3 Top of Section Depth(m): 815.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1A (2-19), 1B (20-32), 1C (32-50), 1D (50-57),
1E (58-64), 1F (65-81), 1G (81-96), 1H (96-109);
Texture : APHYRIC, HOLOXTLN, MEDIUM TO COARSE-GRAINED;
SUBOPHITIC;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE,SMEC
Replacement: CALCITE
SMECTITE
Leg : 53 Top/Bottom Interval(mm): 1100/1480 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 816.48
Core: 79 Top of Core Depth (m) : 812.00
Sect: 3 Top of Section Depth(m): 816.10
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1I (110-124), 1J (125-133), 1K (132-140),
1L (141-148);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY, GLASS MARGIN OCCURS AT 115CM;
Structure : THIS INTERVAL IS PART OF BASALT DIKE;
Alteration : MOD;
Comments : DIKE MEDIUM GRAY;
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): <1
FRESH;
OLIVINE ( 2-3%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1030 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 817.53
Core: 79 Top of Core Depth (m) : 812.00
Sect: 4 Top of Section Depth(m): 816.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (3-10), 1B (9-17), 1C (17-30), 1D (31-40),
1E (40-48), 1F (48-54), 2A (58-64), 2B (65-77),
2C (77-87), 2D (88-103);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS IS FINE-GRAINED TO
GLASSY, GLASSY ZONE MARKS CONTACT OF DIKE AND FLOW,
GLASS IS ALTERED TO SMEC AND MINOR PYRITE;
Structure : SPARSE VEINS FILLED WITH SMEC + PYRITE, CONTACT
BETWEEN FLOW AND DIKE IS VERY STEEP EXTENDING FROM
58-96CM;
Alteration : MOD;
Comments : DIKE BASALT GRAY TO GREENISH GRAY;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
FRESH;
OLIVINE ( 4%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <3
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
PYRITE
Minerals Replaced: GLASS
Leg : 53 Top/Bottom Interval(mm): 1030/1430 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 817.93
Core: 79 Top of Core Depth (m) : 812.00
Sect: 4 Top of Section Depth(m): 817.53
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
Piece No. : PCE 2E (103-110), 2F (109-115), 2G (115-127),
2H (127-143);
Texture : PLAG MODERATELY PHYRIC, GNDMASS HOLOXTLN, MEDIUM TO
COARSE-GRAINED, SUBOPHITIC;
Structure : SPARSE VEINS FILLED WITH SMEC + PYRITE;
Alteration : SLIGHTLY;
Comments : BASALT GRAY;
Vesicles : Size(mm): <3 Percent: <1
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): <8
FRESH;
Replacement: SMECTITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 819.47
Core: 79 Top of Core Depth (m) : 812.00
Sect: 5 Top of Section Depth(m): 818.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-17), 1B (14-30), 1C (30-38), 1D (37-45),
1E (45-58), 1F (58-67), 1G (67-77), 1H (75-87),
1I (87-91), 1J (92-102), 1K (102-117), 1L (117-133),
1M (133-147);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS HOLOXTLN, MEDIUM TO
COARSE-GRAINED, SUBOPHITIC;
Structure : PROMINENT VEIN IN PCE 1 FILLED WITH SMEC + CALCITE;
MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <5
FRESH;
OLIVINE ( 3%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 4%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 820.96
Core: 79 Top of Core Depth (m) : 812.00
Sect: 6 Top of Section Depth(m): 819.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-11), 1B (9-17), 1C (17-33), 1D (33-48),
1E (50-64), 1F (65-76), 1G (76-84), 1H (79-91),
1I (92-95), 1J (95-106), 2A (116-124), 2B (125-130),
2C (131-146);
Texture : PLAG-OL MODERATELY PHYRIC, PHENOS INCREASE TOWARD
BOTTOM OF SECTION, GNDMASS FINE TO MEDIUM-GRAINED
WITH SOME INTERSTITIAL GLASS ALTERED TO SMEC;
Structure : SCATTERED VEINS ARE FILLED WITH SMEC + CALCITE,
MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CALCITE
Phenocrysts: PLAGIOCLASE ( 2-8%)
Size(mm): <8
FRESH;
OLIVINE ( 1%)
Size(mm): <1
PARTLY REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1240 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 822.24
Core: 79 Top of Core Depth (m) : 812.00
Sect: 7 Top of Section Depth(m): 821.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-18), 1B (20-28), 1C (29-43), 1D (45-58),
1E (60-72), 2A (75-90), 2B (90-97), 2C (97-103),
2D (103-113), 2E (115-124);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED, GRAIN SIZE
DECREASES GRADUALLY WITH DEPTH;
Structure : NUMEROUS FRACTURES AND VEINLETS FILLED WITH SMEC,
PCE 2E REPRESENTS BASE OF MASSIVE COOLING UNIT,
MASSIVE;
Alteration : MOD;
Comments : BASALT GRAY TO GREENISH GRAY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 822.98
Core: 80 Top of Core Depth (m) : 821.50
Sect: 1 Top of Section Depth(m): 821.50
LITHOLOGY: PLAG-CPX SPARSELY TO MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (4-7), 2A (10-18), 2B (18-35), 2C (32-45),
2D (45-54), 2E (52-63), 3A (65-76), 3B (77-89),
4 (93-97), 5 (100-109), 6 (113-123), 7 (125-136),
8 (138-148);
Texture : PLAG-CPX SPARSELY TO MODERATELY PHYRIC, FROM PCE 1-8
GRAIN SIZE INCREASES WHILE AMOUNT OF PLAG PHENOS
DECREASES, PCE 1 IS A VERY FINE-GRAINED ROCK WITH A
LITTLE AMOUNT OF GLASS;
PCE 1 IS UPPER MARGIN OF NEW COOLING UNIT JUST
BELOW THE ONE IN SECTION 79-7;
Structure : THIN VEINS FILLED WITH SMEC + CALCITE + PYRITE,
MASSIVE;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( <5%)
Size(mm): <5
FRESH;
CLINOPYROXENE ( <1%)
Size(mm): <1
OLIVINE
RARE, ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1090 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 824.09
Core: 80 Top of Core Depth (m) : 821.50
Sect: 2 Top of Section Depth(m): 823.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-15), 1B (15-25), 1C (26-31), 2 (34-51),
3 (55-70), 4 (73-77), 5A (83-97), 5B (97-109);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, GNDMASS COARSE
GRAINED;
Structure : MASSIVE;
Alteration : SLIGHTLY;
Comments : FROM PCE 1A TO THE TOP OF PCES 6A-B IS THE
CONTINUATION OF COOLING UNIT OF SECTION 80-1;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <4
CLINOPYROXENE ( <1%)
Size(mm): <1
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 1110/1470 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 824.47
Core: 80 Top of Core Depth (m) : 821.50
Sect: 2 Top of Section Depth(m): 824.11
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 6A (111-122), 6B (122-131), 7 (135-147);
Texture : PLAG-OL PHYRIC BASALT, GNDMASS FINE-GRAINED,
PCE 6A-B SHOW CONTACT BETWEEN COARSE AND FINE
GRAINED BASALT WITH A GLASSY MARGIN AND IS
INTERPRETED AS A DIKE CONTACT;
Structure : THIN VEINS FILLED WITH SMEC AND MINOR PYRITE;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <7
FRESH;
OLIVINE ( 2%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1270 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 825.77
Core: 80 Top of Core Depth (m) : 821.50
Sect: 3 Top of Section Depth(m): 824.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (2-12), 1B (12-21), 1C (21-36), 2A (40-49),
2B (44-59), 3A (63-77), 3B (77-90), 3C (90-96),
3D (96-101), 3E (101-103), 3F (104-116),
3G (117-127);
Texture : PLAG-OL PHYRIC BASALT, CONTINUATION OF THE FINE
GRAINED ROCK OF DIKE, GRAIN SIZE OF GNDMASS SEEMS TO
BE A LITTLE COARSER IN CENTER OF THIS COOLING UNIT
(PCES 2A-B), IN PCES 1A-B BRECCIATED ZONE, CEMENT
BETWEEN BASALT FRAGMENTS IS SMEC + CALCITE + PYRITE
AND POSSIBLY QUARTZ, ONE OF THE BASALT FRAGMENTS IS
COARSE-GRAINED, PCE 1B SHOWS A CHILLED CONTACT WITH
NARROW GLASSY ZONE BETWEEN THE DIKE AND A COARSE-
GRAINED MATERIAL;
Alteration : SLIGHTLY;
Comments : THIN SECTION - PHENOS - OL 2% AND PLAG 8%, GNDMASS
PLAG: CPX IS 1:1 AND OP.MINS 5%;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <6
FRESH;
OLIVINE ( 1-2%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
QUARTZ
PYRITE
IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 1310/1470 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 825.97
Core: 80 Top of Core Depth (m) : 821.50
Sect: 3 Top of Section Depth(m): 825.81
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 4 (131-138), 5 (142-147);
Texture : PLAG SPARSELY PHYRIC BASALT, COARSE-GRAINED, DIKE
SHOWS A CHILLED CONTACT WITH A FEW MM OF THICK
GLASSY MARGIN;
Alteration : SLIGHTLY;
Comments : PCE 4 VERTICAL CONTACT BETWEEN THE DIKE AND A COARSE
GRAINED MATERIAL, SAME AS TOP OF SECTION 80-2;
Phenocrysts: PLAGIOCLASE
Leg : 53 Top/Bottom Interval(mm): 0/ 420 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 826.42
Core: 80 Top of Core Depth (m) : 821.50
Sect: 4 Top of Section Depth(m): 826.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (2-5), 1B (5-15), 1C (15-26), 1D (26-42);
Texture : PLAG-OL-CPX PHYRIC, CORE CONSISTS OF UPPER DIKE ROCK
(1A-1D), FLOW ROCK OF PREVIOUS SECTIONS (1E-2) AND
DIKE ROCK AGAIN (1I-3), NARROW GLASS ZONE (2MM) AT
DIKE CONTACT, GNDMASS CRYPTXLN;
Alteration : SLIGHTLY;
Comments : DIKE CONTACTS ARE AT 1D-E INTERFACE AND 1I-2, DIKES
ARE INTRUSIVE TO FLOW SINCE THEY HAVE CHILLED
MARGINS, UPPER CONTACT OF DIKE IS EXPOSED ON BACK
SIDE OF WORKING HALF OF CORE;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 1-5
OLIVINE ( <1%)
Size(mm): <2
EUHEDRAL;
CLINOPYROXENE ( <1%)
MAY OCCUR WITH PLAG PHENOS;
Leg : 53 Top/Bottom Interval(mm): 420/1090 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 827.09
Core: 80 Top of Core Depth (m) : 821.50
Sect: 4 Top of Section Depth(m): 826.42
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1E (42-59), 1F (60-76), 1G (76-90), 1H (90-109);
Texture : PLAG-CPX-OL MODERATELY PHYRIC BASALT, GNDMASS COARSE
GRAINED, OPHITIC OR SUBOPHITIC, PLAG CONTENT IS
HIGHER AND CPX LOWER THAN IN FLOW IN CORE 78 BUT
STILL MAY BE THE SAME;
Structure : MASSIVE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): 1-4
EUHEDRAL, FRESH;
CLINOPYROXENE ( <1%)
Size(mm): 1-2
FRESH, INTERGROWN WITH PLAG;
OLIVINE ( <1%)
Size(mm): 1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 1090/1440 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 827.44
Core: 80 Top of Core Depth (m) : 821.50
Sect: 4 Top of Section Depth(m): 827.09
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1I (109-118), 2 (120-127), 3 (129-144);
Texture : PLAG-OL-CPX PHYRIC, SAME AS DIKE ROCK IN PCES 1A-D;
Structure : PART OF DIKE ROCK;
Alteration : SLIGHTLY;
Leg : 53 Top/Bottom Interval(mm): 0/1090 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 828.59
Core: 80 Top of Core Depth (m) : 821.50
Sect: 5 Top of Section Depth(m): 827.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (2-17), 1B (18-27), 1C (28-38), 2A (43-61),
2B (62-72), 3 (76-87), 4 (95-109);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS CRYPTXLN, BASE OF PCE 4
FINE-GRAINED DENSE CHILLED ZONE;
Alteration : SLIGHTLY;
Comments : BASE OF PCE 4 IS CONTACT OF DIKE AND FLOW ROCK;
DIKE CONTAINS A 2CM XENOLITH OF FLOW ROCK (PCES 2B-
3), THIN SECTION-PHENOS-OL 1% PLAG 10%, GNDMASS
PLAG:CPX IS 1:1 AND OP.MINS 3% AND 5% GLASS;
Phenocrysts: PLAGIOCLASE (10-12%)
LOCALLY TO 20%, EUHEDRAL, FRESH;
OLIVINE ( <1%)
Size(mm): <2
CLINOPYROXENE ( <1%)
Leg : 53 Top/Bottom Interval(mm): 1110/1440 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 828.94
Core: 80 Top of Core Depth (m) : 821.50
Sect: 5 Top of Section Depth(m): 828.61
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 5A (112-124), 5B (125-137), 5C (137-144);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, PART OF FLOW ROCK;
Structure : PROMINENT VEINS OF SMEC AND LESS ABUNDANT CALCITE
AND MINOR PYRITE AND FE.OXIDE WHICH LINES VEINS;
Alteration : MOD;
Comments : PART OF CONTACT WITH DIKE ON BACK OF 5A;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Replacement: FERROUS OXIDE
CALCITE
PYRITE
SMECTITE
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 830.45
Core: 80 Top of Core Depth (m) : 821.50
Sect: 6 Top of Section Depth(m): 829.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (4-17), 1B (18-29), 2 (34-43), 3 (47-62),
4 (67-78), 5 (83-99), 6A (104-113), 6B (110-121),
7 (126-145);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, GNDMASS COARSE-
GRAINED, SUBOPHITIC TO OPHITIC;
Structure : FEW SMEC + CALCITE VEINLETS, MASSIVE;
Alteration : SLIGHTLY
SMEC ALTERATION IN PCE 1A AT 5CM;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <8
MOSTLY 1-5MM, FRESH, EUHEDRAL;
CLINOPYROXENE
TRACES WITH PLAG PHENOS;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/ 530 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 831.03
Core: 80 Top of Core Depth (m) : 821.50
Sect: 7 Top of Section Depth(m): 830.50
LITHOLOGY: PLAG-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (4-22), 1B (23-38), 1C (40-53);
Texture : PLAG-CPX MODERATELY PHYRIC, GNDMASS COARSE-GRAINED
OPHITIC TO SUBOPHITIC;
Structure : ALL FLOW ROCK;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 4-7%)
Size(mm): <6
EUHEDRAL, FRESH;
CLINOPYROXENE
FRESH TRACES WITH PLAG PHENOS;
Leg : 53 Top/Bottom Interval(mm): 0/1370 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 832.37
Core: 81 Top of Core Depth (m) : 831.00
Sect: 1 Top of Section Depth(m): 831.00
LITHOLOGY: PLAG-OL CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-15), 2 (17-24), 3 (27-30), 4A (32-45),
4B (45-61), 4C (62-76), 4D (77-92), 5A (94-106),
5B (107-121), 5C (122-137);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS COARSE
GRAINED, OPHITIC TO SUBOPHITIC, WHOLE SECTION SAME
MINERALOGY AND TEXTURE, SAME ROCK TYPE AS IN LAST
CORE;
Structure : PROMINENT VEINS OF CALCITE + SMEC + ZEOLITE IN PCE
2, MASSIVE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 4-7%)
Size(mm): <6
FRESH, EUHEDRAL;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
WITH PLAG PHENOS, NOT CLEAR WHETHER IT IS PHENOS
( PART%)
Size(mm): OF GNDMAS
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
ZEOLITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 833.97
Core: 81 Top of Core Depth (m) : 831.00
Sect: 2 Top of Section Depth(m): 832.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-19), 1B (20-31), 2 (38-44), 3A (46-59),
3B (60-72), 3C (72-87), 3D (87-101), 3E (102-116),
3F (116-131), 3G (132-147);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, SUBOPHITIC TO
OPHITIC, HOLOCRYSTALLINE;
Structure : SAME UNIT AS ABOVE SECTION, PROMINENT VEINS IN PCES
3A-B FILLED WITH CALCITE + SMEC (.5CM WIDE);
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GREY, THIN SECTION-OL 2%, PLAG 10%,
CPX 5%, GNDMASS PLAG:CPX IS 5:2, OP.MINS 5%,
INTERSTITIAL MATERIAL 5%;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 4-7%)
Size(mm): <6
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1
FRESH, INTERGROWN WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1440 Analyst:
Hole: 418A Sample Midpoint (m) : 835.44
Core: 81 Top of Core Depth (m) : 831.00
Sect: 3 Top of Section Depth(m): 834.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-18), 1B (19-35), 1C (35-51), 1D (52-65),
1E (65-80), 1F (80-94), 1G (94-108), 1H (109-124),
1I (124-135), 1J (135-144);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS
HOLOCRYSTALLINE, MEDIUM TO COARSE-GRAINED,
SUBOPHITIC, PCES (1A,1D,1H-I) HAVE IRREGULAR PATCHES
OF FINER GRAINED;
Structure : SCATTERED VEINS FILLED WITH SMEC + CALCITE, THICK
CALCITE VEIN IN PCE 1J, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY, CORE CATCHER IS PCE 1J;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
MINOR DISSEMINATED IN THE GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/1430 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 836.93
Core: 81 Top of Core Depth (m) : 831.00
Sect: 4 Top of Section Depth(m): 835.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE (4-8), 2A (13-22), 2B (24-36), 2C (38-49),
2D (50-62), 3A (66-81), 3B (82-96), 3C (97-112),
3D (112-127), 3E (130-143);
Texture : PLAG-OL-CPX MODERATELY PHYRIC BASALT, GNDMASS MEDIUM
TO COARSE-GRAINED, HOLOCRYSTALLINE, SUBOPHITIC,
SCATTERED FINER-GRAINED PATCHES LOCALLY PRESENT;
Structure : SPARSE FRACTURES FILLED WITH SMEC + CARB + ZEOLITE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GREY;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 3-6%)
Size(mm): <6
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
ZEOLITE
Leg : 53 Top/Bottom Interval(mm): 0/1350 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 838.35
Core: 81 Top of Core Depth (m) : 831.00
Sect: 5 Top of Section Depth(m): 837.00
LITHOLOGY: PLAG-OL-CPX MODERATELY TO PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-18), 1B (19-33), 2A (37-52), 2B (52-67),
3A (73-87), 3B (88-102), 4 (106-117), 5 (121-135);
Texture : PLAG-OL-CPX MODERATELY TO PHYRIC, GNDMASS FINE TO
COARSE-GRAINED, SUBOPHITIC, IN PCES 2B AND 5 TEXTURE
IS MOTTLED WITH FINE AND COARSE-GRAINED PATCHES;
Structure : SPARSE VEINS FILLED WITH CALCITE + SMEC + PYRITE,
MASSIVE;
Alteration : SLIGHTLY;
Comments : THIN SECTION-PHENOS-OL 1%, PLAG 10%, CPX 2%,
GNDMASS-PLAG:CPX-5:2, OP.MINS 5%, VERY FINE-GRAINED
MICROCRYSTALLINE 90%, BASALT MEDIUM GREY;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <3
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH, IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
DISSEMINATED IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/ 570 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 839.07
Core: 81 Top of Core Depth (m) : 831.00
Sect: 6 Top of Section Depth(m): 838.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (4-19), 2 (24-38), 3 (44-57);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS
HOLOCRYASTALLINE WITH IRREGULAR PATCHES OF FINE-
GRAINED AND COARSE-GRAINED BASALT GIVING A MOTTLED
TEXTURE;
Structure : MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GREY;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): <7
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH, INTERGROWN WITH PLAG;
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 838.95
Core: 82 Top of Core Depth (m) : 837.50
Sect: 1 Top of Section Depth(m): 837.50
LITHOLOGY: PLAG-OL-CPX MODERATELY TO PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-17), 1B (18-34), 2 (36-53), 3 (55-70),
4 (72-92), 5 (95-107), 6A (109-126), 6B (126-145);
Texture : PLAG-OL-CPX MODERATELY TO PHYRIC, GNDMASS MEDIUM TO
FINE-GRAINED, HOLOCRYSTALLINE, SUBOPHITIC, GRAIN
SIZE DECREASES GRADUALLY WITH DEPTH, FINE-GRAINED
PATCHES AND SCHLIEREN OCCUR THROUGHOUT SECTION AND
ARE PROMINENT IN PCE 6B;
Structure : MASSIVE;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 3-8%)
Size(mm): <8
FRESH;
OLIVINE ( 3%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 3%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1450 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 840.45
Core: 82 Top of Core Depth (m) : 837.50
Sect: 2 Top of Section Depth(m): 839.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-20), 1B (21-37), 1C (38-42), 1D (42-55),
1E (55-65), 1F (65-77), 1G (77-92), 1H (92-103),
1I (103-117), 1J (118-128), 1K (129-145);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS MEDIUM-
GRAINED, HOLOCRYSTALLINE, SUBOPHITIC, FINE-GRAINED
SCHLIEREN OCCUR IN PCE 1D;
Structure : VEINS COMMON AND FILLED WITH SMEC + CALCITE +
QUARTZ, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <10
FRESH;
OLIVINE ( 1-2%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <1
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
QUARTZ
PYRITE
MINOR, DISSEMINATED IN GNDMASS;
Leg : 53 Top/Bottom Interval(mm): 0/ 380 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 841.26
Core: 82 Top of Core Depth (m) : 837.50
Sect: CC Top of Section Depth(m): 840.98
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-7), 1B (7-22), 1C (22-38);
Texture : PLAG-OL-CPX MODERATELY PHYRIC BASALT, GNDMASS VERY
FINE-GRAINED, HOLOCRYSTALLINE;
Structure : SPARSE VEINS FILLED WITH CALCITE, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <10
FRESH;
OLIVINE ( 2%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 841.96
Core: 83 Top of Core Depth (m) : 840.50
Sect: 1 Top of Section Depth(m): 840.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-13), 1B (14-25), 1C (25-30), 1D (30-33),
1E (33-42), 1F (42-57), 1G (57-71), 1H (72-84),
1I (85-97), 1J (99-112), 1K (113-129), 1L (130-141),
1M (140-146);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED,
HOLOCRYSTALLINE, APHYRIC ZONES IN PCES 1B AND 1D
PROBABLY DON'T REPRESENT COOLING BREAKS;
Structure : SCATTERED VEINLETS FILLED WITH SMEC AND MINOR
CALCITE;
Alteration : SLIGHTLY
GNDMASS ALTERED TO SMEC + CALCITE AND MINOR
PYRITE;
Comments : BASALT MEDIUM GRAY;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC
Groundmass : PLAGIOCLASE ( 50%)
CLINOPYROXENE ( 20%)
OLIVINE ( 20%)
10% MICROCRYSTALLINE MATRIX;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <8
FRESH, EUHEDRAL;
OLIVINE ( 3%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG,
SUBHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1440 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 843.44
Core: 83 Top of Core Depth (m) : 840.50
Sect: 2 Top of Section Depth(m): 842.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-14), 1B (15-19), 1C (19-36), 1D (37-46),
1E (39-54), 1F (54-67), 1G (68-84), 1H (84-97),
1I (97-111), 1J (111-127), 1K (127-140),
1L (136-144);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS MEDIUM TO
COARSE-GRAINED, HOLOCRYSTALLINE, SUBOPHITIC;
Structure : VEINS FILLED WITH CALCITE AND GREEN SMEC,
SLICKENSIDES PRESENT ON FRACTURE SEPARATING PCES 1D-
E, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Groundmass : PLAGIOCLASE ( 50%)
OLIVINE ( 15%)
CLINOPYROXENE ( 25%)
MAGNETITE ( 10%)
Phenocrysts: PLAGIOCLASE ( 3-7%)
Size(mm): <8
FRESH;
OLIVINE ( 2%)
Size(mm): <1
ALTERED TO SMEC + CALCITE;
CLINOPYROXENE ( 2%)
Size(mm): <2
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1430 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 844.93
Core: 83 Top of Core Depth (m) : 840.50
Sect: 3 Top of Section Depth(m): 843.50
LITHOLOGY: APHYRIC TO PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-15), 1B (16-18), 1C (19-26), 1D (26-35),
1E (35-50), 1F (51-56), 1G (57-62), 1H (63-76),
1I (77-90), 1J (90-96), 1K (96-101), 1L (102-120),
1M (120-130), 1N (131-143);
Texture : APHYRIC TO PLAG SPARSELY PHYRIC, GNDMASS FINE
GRAINED, HOLOCRYSTALLINE;
Structure : PCE 1E HAS SLICKENSIDES DIPPING 70 DEGREES REVERSE,
MASSIVE;
Alteration : EXTENSIVELY
FROM 70-100CM;
MOD
REST OF SECTION;
Comments : BASALT MEDIUM GRAY TO GREENISH GRAY;
Vesicles : Size(mm): <1 Percent: 0.5
Location: Filling: SMEC,CALCITE
Groundmass : PLAGIOCLASE ( 30%)
CLINOPYROXENE ( 20%)
OLIVINE ( 25%)
OPAQUE MINERALS ( 5%)
10-15% MICROCRYSTALLINE INTERSTITIAL MATRIX
GNDMASS ALTERED TO SMEC + ZEOLITE AND MINOR
CALCITE IN INTERVAL 70-100CM;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): <6
FRESH, SUBHEDRAL;
Replacement: SMECTITE
CALCITE
ZEOLITE
Leg : 53 Top/Bottom Interval(mm): 0/1260 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 846.26
Core: 83 Top of Core Depth (m) : 840.50
Sect: 4 Top of Section Depth(m): 845.00
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-12), 1B (12-25), 1C (25-27), 1D (28-41),
1E (41-56), 1F (56-69), 1G (68-84), 1H (85-101),
1I (101-117), 1J (117-126);
Texture : PLAG MODERATELY PHYRIC BASALT, GNDMASS MEDIUM
GRAINED, HOLOCRYSTALLINE;
Alteration : EXTENSIVELY
PCE 1A-E AND 1H-I;
FRESH
REST OF SECTION;
Comments : BASALT GRAY TO GREENISH GRAY;
Groundmass : PLAGIOCLASE ( 50%)
OLIVINE ( 15%)
ALTERED TO SMEC + CALCITE;
CLINOPYROXENE ( 25%)
MAGNETITE ( 10%)
SOME ALTERED ZONES WHERE GNDMASS REPLACED BY
SMEC + CALCITE AND MINOR PYRITE;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <8
FRESH OR PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 846.96
Core: 84 Top of Core Depth (m) : 845.50
Sect: 1 Top of Section Depth(m): 845.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (4-6), 2A (10-23), 2B (24-32), 2C (30-38),
2D (39-51), 3A (56-71), 3B (72-87), 3C (87-101),
3D (101-120), 4 (126-133), 5 (141-146);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS MEDIUM TO
COARSE-GRAINED, HOLOCRYSTALLINE, SUBOPHITIC, PCE 1
IS FINE-GRAINED AND MAY HAVE FALLEN IN HOLE;
Structure : VEINS FILLED WITH SMEC + CALCITE AND MINOR PYRITE,
PCE 3B IS SLICKENSIDED, MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM GRAY TO GREENISH GRAY;
Groundmass : PLAGIOCLASE
NEEDLES;
CLINOPYROXENE
BROWN;
DARK INTERSTITIAL MATERIAL, IRREGULAR PATCHES OF
SMEC;
Phenocrysts: PLAGIOCLASE ( 2-3%)
Size(mm): <5
FRESH;
OLIVINE ( 1-2%)
Size(mm): <1
FRESH, EUHEDRAL;
CLINOPYROXENE ( 1%)
Size(mm): <1
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1330 Analyst: Mevel, C.
Hole: 418A Sample Midpoint (m) : 848.33
Core: 84 Top of Core Depth (m) : 845.50
Sect: 2 Top of Section Depth(m): 847.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-15), 1B (15-31), 1C (30-44), 1D (45-57),
1E (58-72), 1F (72-86), 1G (86-102), 1H (102-118),
1I (119-133);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS MEDIUM TO
COARSE-GRAINED, HOLOCRYSTALLINE, SUBOPHITIC, PHENOS
INCREASE SLIGHTLY WITH DEPTH;
Structure : MASSIVE;
Alteration : MOD
TOP OF SECTION SLIGHTLY ALTERED WITH PATCHES OF
SMEC;
Comments : BASALT MEDIUM GRAY, CONTINUATION OF SECTION 1;
Groundmass : PLAGIOCLASE
FRESH, LATHS;
CLINOPYROXENE
BROWN;
OTHER
DARK INTERSTITIAL MATERIAL;
Phenocrysts: PLAGIOCLASE ( 6%)
Size(mm): TO 6
INCREASES DOWN SECTION FROM 3-6%, FRESH;
CLINOPYROXENE ( 2%)
GREEN, IN PHENOS WITH PLAG;
OLIVINE ( 2-3%)
Size(mm): TO 1
ALTERED TO SMEC;
Replacement: PYRITE ( TR%)
SMECTITE
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 849.97
Core: 84 Top of Core Depth (m) : 845.50
Sect: 3 Top of Section Depth(m): 848.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-19), 1B (20-31), 1C (32-49), 1D (50-65),
1E (65-79), 2A (85-97), 2B (97-113), 3A (117-120),
3B (120-122), 3C (122-134), 3D (135-147);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS MEDIUM TO
COARSE-GRAINED, HOLOCRYSTALLINE, SUBOPHITIC;
Structure : OCCASIONAL VEINLET FILLED WITH CALCITE + SMEC AND
MINOR PYRITE, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Groundmass : PYROXENE
BROWN AND BLACK IN CONTRAST TO GREEN PHENOS;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <8
FRESH, EUHEDRAL;
CLINOPYROXENE ( 1-3%)
Size(mm): <2
OFTEN IN SUBOPHITIC CLOTS WITH PLAG, GREEN;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1320 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 851.32
Core: 84 Top of Core Depth (m) : 845.50
Sect: 4 Top of Section Depth(m): 850.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-18), 2 (22-38), 3A (43-58), 3B (60-74),
4 (78-94), 5 (96-111), 6 (115-132);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS MEDIUM TO
COARSE-GRAINED, SUBOPHITIC;
Structure : PROMINENT VEINS IN PCES 2 AND 6 FILLED WITH SMEC
AND MINOR CALCITE + PYRITE, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <2
FRESH, EUHEDRAL;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 1-3%)
Size(mm): <2
USUALLY IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/1460 Analyst: Mathez, E.
Hole: 418A Sample Midpoint (m) : 851.46
Core: 85 Top of Core Depth (m) : 850.00
Sect: 1 Top of Section Depth(m): 850.00
LITHOLOGY: PLAG-OL-CPX MODERATELY TO PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-19), 2 (22-40), 3A (42-62), 3B (62-80),
4 (83-103), 5 (108-124), 6 (127-146);
Texture : PLAG-OL-CPX MODERATELY TO PHYRIC, GNDMASS SUBOPHITIC
AND HOLOCRYSTALLINE, MEDIUM TO COARSE-GRAINED (0.5
MM);
Structure : RARE VEINLETS FILLED WITH SMEC, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Phenocrysts: PLAGIOCLASE ( 6-9%)
Size(mm): <8
FRESH, EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <3
MOSTLY FRESH, SOME ALTERED TO SMEC + CALCITE,
EUHEDRAL TO SUBHEDRAL, PALE BROWN, FRACTURES
CONCOIDALLY, POOR CLEAVAGE, HAS CALCITE-FILLED
FRACTURES, REFRACTIVE INDEX DETERMINATION OF
COMPOSITION GIVES FORSTERITE 30;
CLINOPYROXENE ( 4-8%)
Size(mm): <3
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 852.97
Core: 85 Top of Core Depth (m) : 850.00
Sect: 2 Top of Section Depth(m): 851.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (3-21), 2A (22-32), 2B (32-40), 3 (44-62),
4 (65-85), 5A (88-105), 5B (105-111), 5C (112-121),
5D (121-135), 6 (138-147);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS MEDIUM TO
COARSE-GRAINED, HOLOCRYSTALLINE, SUBOPHITIC;
Structure : PCES (2A,5A-C) ARE SLICKENSIDED, MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Groundmass : PLAGIOCLASE ( 55%)
LATHS;
CLINOPYROXENE (20-22%)
EUHEDRAL TO SUBHEDRAL GREEN AND SUBHEDRAL PINK-
BROWN;
OLIVINE ( 5%)
ALTERED;
MAGNETITE ( 5%)
Phenocrysts: PLAGIOCLASE ( 4-5%)
Size(mm): <5
FRESH;
OLIVINE ( 4-5%)
Size(mm): <4
PARTLY ALTERED TO SMEC, EUHEDRAL;
CLINOPYROXENE ( 2%)
Size(mm): <2
OFTEN IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1470 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 854.47
Core: 85 Top of Core Depth (m) : 850.00
Sect: 3 Top of Section Depth(m): 853.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-15), 2 (17-26), 3 (28-49), 4A (52-57),
4B (58-73), 5A (75-87), 5B (84-90), 6A (92-96),
6B (96-106), 6C (107-114), 6D (115-128),
7A (130-136), 7B (136-140), 7C (141-147);
Texture : PLAG-SPARSELY PHYRIC BASALT, GNDMASS HOLOCRYSTALLINE
AND SUBOPHITIC, MEDIUM TO COARSE-GRAINED;
Structure : SPARSE VEINS FILLED WITH SMEC + CALCITE, BELONGS TO
MASSIVE COOLING UNIT;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Groundmass : PLAGIOCLASE ( 60%)
CLINOPYROXENE ( 15%)
LIGHT GREEN;
OLIVINE ( 5%)
ALTERED TO SMEC + CALCITE;
10% FINE-GRAINED MICROCRYSTALLINE MATRIX, 8%
LIGHT BROWN TRANSPARENT MINERAL, POSSIBLY OPX OR
OPAL;
MAGNETITE ( 2%)
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 855.98
Core: 85 Top of Core Depth (m) : 850.00
Sect: 4 Top of Section Depth(m): 854.50
LITHOLOGY: PLAG-MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-21), 1B (22-37), 1C (38-56), 2 (61-73),
3A (76-94), 3B (94-100), 3C (100-107), 4 (114-118),
5 (122-133), 6 (138-148);
Texture : PLAG MODERATELY PHYRIC, GNDMASS HOLOCRYSTALLINE,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC;
Structure : SPARSE VEINS FILLED WITH SMEC (PCES 1B-C, 2, 3B-C,
6), MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE (50-60%)
CLINOPYROXENE (10-15%)
LIGHT GREEN;
OLIVINE ( 5%)
ORTHOPYROXENE ( 5-10%)
LIGHT BROWN;
MAGNETITE ( 2%)
10-15% DARK MICROCRYST GNDMASS;
Phenocrysts: PLAGIOCLASE ( 2-3%)
Size(mm): <4
FRESH, EUHEDRAL;
Replacement: SMECTITE
Leg : 53 Top/Bottom Interval(mm): 0/1430 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 857.43
Core: 85 Top of Core Depth (m) : 850.00
Sect: 5 Top of Section Depth(m): 856.00
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-8), 2A (10-16), 2B (17-27), 3A (30-46),
3B (47-64), 4 (66-85), 5A (91-104), 5B (105-113),
5C (113-122), 5D (125-131), 5F (132-143);
Texture : PLAG MODERATELY PHYRIC, GNDMASS HOLOCRYSTALLINE,
MEDIUM TO COARSE-GRAINED, SUBOPHITIC;
Structure : SCATTERED VEINS FILLED WITH SMEC, PCE 5E IS
SLICKENSIDED, BELONGS TO MASSIVE COOLING UNIT ABOUT
30 METERS THICK;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE ( 60%)
FRESH, LATHS;
CLINOPYROXENE ( 15%)
LIGHT GREEN;
OLIVINE ( 5%)
REPLACED BY SMEC + CALCITE;
ORTHOPYROXENE ( 5-8%)
MAGNETITE ( 2%)
FINE-GRAINED INTERSTITIAL MATRIX 10%;
Phenocrysts: PLAGIOCLASE ( 4%)
Size(mm): <3
FRESH, EUHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1350 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 858.85
Core: 85 Top of Core Depth (m) : 850.00
Sect: 6 Top of Section Depth(m): 857.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-6), 1B (7-12), 1B1 (10-22), 1C (22-33),
1D (32-40), 1E (40-59), 1F (60-78), 2A (80-100),
2B (100-118), 3 (122-135);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS MEDIUM TO COARSE-
GRAINED, HOLOCRYSTALLINE, SUBOPHITIC;
Structure : SCATTERED VEINS FILLED WITH SMEC + CALCITE,
FRACTURES ARE OFTEN SLICKENSIDED (PCES 1B-C, 1E-3);
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Groundmass : PLAGIOCLASE ( 55%)
LATHS;
OLIVINE ( 5%)
ALTERED;
CLINOPYROXENE ( 15%)
GREEN;
CLINOPYROXENE ( 5-7%)
BROWN;
MAGNETITE ( 5-7%)
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <8
FRESH;
OLIVINE ( 3-5%)
Size(mm): <3
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1440 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 860.44
Core: 85 Top of Core Depth (m) : 850.00
Sect: 7 Top of Section Depth(m): 859.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (3-17), 2A (19-33), 2B (33-36), 3A (39-42),
3B (42-57), 4A (61-71), 4B (70-77), 5 (81-102),
6A (105-123), 6B (123-132), 7 (135-144);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS MEDIUM TO COARSE-
GRAINED, HOLOCRYSTALLINE, SUBOPHITIC;
Structure : SCATTERED VEINS ARE FILLED WITH SMEC, FRACTURES ARE
SLICKENSIDED (PCES 1-2A,4A, 6A-B), MASSIVE;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM GRAY;
Groundmass : PLAGIOCLASE ( 55%)
LATHS;
OLIVINE ( 5%)
CLINOPYROXENE ( 15%)
GREEN;
CLINOPYROXENE ( 10%)
BROWN;
MAGNETITE ( 5%)
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <8
FRESH;
OLIVINE ( 5%)
Size(mm): <4
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/ 260 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 859.76
Core: 86 Top of Core Depth (m) : 859.50
Sect: 1 Top of Section Depth(m): 859.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (1-10), 1B (10-19), 1C (19-26);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS HOLOCRYSTALLINE,
MEDIUM-GRAINED TO FINE-GRAINED, SUBOPHITIC, GRAIN
SIZE DECREASES GRADUALLY TOWARD 26CM;
Structure : LOWER QUENCHED MARGIN OF MASSIVE FLOW IN PREVIOUS
CORES, MASSIVE;
Alteration : MOD;
Comments : BASALT MEDIUM GRAY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
FRESH;
OLIVINE ( 3%)
Size(mm): <1
PARTLY ALTERED TO SMEC;
CLINOPYROXENE ( 5%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 280/1470 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 860.97
Core: 86 Top of Core Depth (m) : 859.50
Sect: 1 Top of Section Depth(m): 859.78
LITHOLOGY: BASALTIC BRECCIA;
CLASTS MADE OF PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 2 (28-34), 3A (37-42), 3B (42-55), 3C (55-61),
4A (64-69), 4B (70-85), 4C (86-94), 4D (95-99),
4E (100-108), 4F (109-113), 5 (117-147);
Texture : POORLY SORTED ANGULAR CLASTS UP TO 20CM ACROSS IN A
MATRIX OF GREENISH TO BLUISH SMEC, GNDMASS FINE-
GRAINED TO GLASSY, GLASSY RINDS ALTERED TO PALAG AND
SMEC, GLASSY MARGINS INCREASE DOWNWARD (PCES 4B-F);
Alteration : MOD;
Comments : BASALT GREENISH-GRAY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 3%)
Size(mm): <3
FRESH, EUHEDRAL, LIGHT GREEN;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
PALAGONITE
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 862.48
Core: 86 Top of Core Depth (m) : 859.50
Sect: 2 Top of Section Depth(m): 861.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-12), 1B (12-18), 2 (21-30), 3 (34-44),
4A (46-64), 4B (64-78), 5A (80-84), 5B (84-90),
5C (90-100), 6A (102-107), 6B (107-117),
7 (119-124), 8A (127-142), 8B (142-148);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
GLASS SELVAGES PARTLY PALAGONITIZED AND PARTLY
ALTERED TO SMEC, BRECCIA CONSISTS OF FRAGMENTS UP TO
0.5MM WITH CEMENT OF SMEC AND MINOR CALCITE, BRECCIA
OCCURS NEAR PILLOW MARGINS;
Structure : VEINS AND CRACKS FILLED WITH SMEC AND MINOR PYRITE,
PILLOW BASALT;
Alteration : SLIGHTLY
TO 78CM;
MOD
78-148CM;
Comments : BASALT DARK GRAY TO GREENISH GRAY;
Phenocrysts: PLAGIOCLASE (12-14%)
Size(mm): <6
FRESH;
OLIVINE ( 3%)
Size(mm): <4
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <5
FRESH, RIMMED WITH PLAG, PROBABLY XENOCRYSTIC;
Replacement: PYRITE
SMECTITE
Minerals Replaced: OL,GLASS
PALAGONITE
CALCITE
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 863.98
Core: 86 Top of Core Depth (m) : 859.50
Sect: 3 Top of Section Depth(m): 862.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-15), 1B (15-24), 1C (25-32), 2A (35-45),
2B (45-55), 3 (57-69), 4 (72-83), 5 (85-92),
6 (95-107), 7 (109-113), 8 (115-128), 9A (131-139),
9B (140-148);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
GLASS SELVAGES PARTLY ALTERED TO SMEC IN PCES (2A,7
8, 9A-B);
Structure : PROMINENT VEINS IN PCES (2B,8,9B) ARE FILLED WITH
SMEC + CALCITE, PILLOW BASALT;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE
Groundmass : PLAGIOCLASE
LATHS TO MICROCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
FRESH;
OLIVINE ( 4%)
Size(mm): <3
ALTERED TO SMEC + CARB;
CLINOPYROXENE ( 4%)
Size(mm): <6
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
Leg : 53 Top/Bottom Interval(mm): 0/1480 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 865.48
Core: 86 Top of Core Depth (m) : 859.50
Sect: 4 Top of Section Depth(m): 864.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-12), 1B ( 12-25), 1C (25-32), 1D (32-43),
2A (45-62), 2B (62-74), 3 (78-86), 4 (90-94),
5 (96-102), 6 (105-116), 7A (118-136), 7B (136-148);
Texture : PLAG-OL-CPX PHYRIC BASALT, GNDMASS FINE-GRAINED TO
GLASSY, GLASS SELVAGES PARTLY ALTERED TO SMEC +
CALCITE AND ZEOLITE, SOME GLASSY ZONES PARTLY
BRECCIATED, ONE PILLOW (PCE 2B-5) HAS SMALLER PHENOS
AND FINER-GRAINED GNDMASS THAN REMAINDER OF SECTION,
GLASSY MARGINS IN PCES (1C-2B, 5,7A);
Structure : VEINS IN PCE 2A IS SLICKENSIDED, SCATTERED VEINS
FILLED WITH SMEC + CALCITE, SLICKENSIDE DIP 60
DEGREES AND REVERSED 50 DEGREES, PILLOW BASALT;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Phenocrysts: PLAGIOCLASE (12-15%)
Size(mm): <8
FRESH;
OLIVINE ( 3-4%)
Size(mm): <3
ALTERED TO SMEC;
CLINOPYROXENE ( 1-2%)
Size(mm): <3
FRESH, OFTEN IN SUBOPHITIC CLOTS WITH PLAG,
SUBHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
ZEOLITE
Leg : 53 Top/Bottom Interval(mm): 0/ 250 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 865.75
Core: 86 Top of Core Depth (m) : 859.50
Sect: 5 Top of Section Depth(m): 865.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-14), 1b (15-24);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO GLASSY, GLASS SELVAGES PARTLY ALTERED TO SMEC,
GNDMASS VITROPHYRIC-MICROCRYSTALLINE TO INTERSERTAL
TEXTURE;
Structure : PILLOW;
Alteration : FRESH;
Comments : BASALT MEDIUM TO DARK GRAY;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <4
FRESH, EUHEDRAL;
OLIVINE ( 1%)
Size(mm): <1.5
ALTERED TO SMEC, EUHEDRAL, LIGHT GREEN;
CLINOPYROXENE ( 1-2%)
Size(mm): <1
FRESH, USUALLY IN SUBOPHITIC CLOTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 250/ 730 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 866.23
Core: 86 Top of Core Depth (m) : 859.50
Sect: 5 Top of Section Depth(m): 865.75
LITHOLOGY: APHYRIC BASALT;
PILLOW;
Piece No. : PCE 2 (25-37), 3 (42-50), 4A (52-63), 4B (64-73);
Texture : APHYRIC, GNDMASS VERY FINE-GRAINED TO GLASSY, GLASS
SELVAGES PRESENT AT TOP AND BOTTOM;
Structure : INTERVAL PROBABLY A PILLOW OR SMALL INTRUSION LIKE
CONCORDANT DIKE;
Alteration : FRESH
GLASS IS FRESH;
Comments : BASALT IS MEDIUM GRAY;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): <1
FRESH, EUHEDRAL;
Leg : 53 Top/Bottom Interval(mm): 760/1410 Analyst: Staudigel, H.
Hole: 418A Sample Midpoint (m) : 866.91
Core: 86 Top of Core Depth (m) : 859.50
Sect: 5 Top of Section Depth(m): 866.26
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 5 (76-80), 6A (83-88), 6B (88-101),
6C (102-111), 7 (114-119), 8 (121-127), 9 (128-141);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, SAME AS FROM 0-25CM,
SLIGHTLY HIGHER IN PHENOS CONTENT;
Structure : PROMINENT VEINS IN PCES 6A-B AND 9 FILLED WITH
SMEC + CALCITE AND MINOR PYRITE, PILLOW;
Alteration : SLIGHTLY;
Comments : BASALT MEDIUM TO DARK GRAY;
Replacement: SMECTITE
CALCITE
PYRITE
Leg : 53 Top/Bottom Interval(mm): 0/ 550 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 867.55
Core: 86 Top of Core Depth (m) : 859.50
Sect: 6 Top of Section Depth(m): 867.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC GRAY;
PILLOW;
Piece No. : PCE 1 (4-7), 2A (12-26), 2B (27-36), 3 (40-55);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO GLASSY, GLASS SELVAGES PARTLY ALTERED TO SMEC IN
PCES 1 AND 2A;
Structure : VEINS FILLED WITH SMEC AND MINOR PYRITE, PILLOW;
Alteration : MOD;
Comments : BASALT GREENISH GRAY;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <3
FRESH;
OLIVINE ( 1%)
Size(mm): <3
ALTERED TO SMEC + CALCITE;
CLINOPYROXENE ( <1%)
Size(mm): <1
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
PYRITE
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