Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 539.49
Core: 48 Top of Core Depth (m) : 532.00
Sect: 5 Top of Section Depth(m): 538.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (1-2), 1B (2-3), 2 (6-14), 3A (16-34),
3A1 (35-45), 3B (47-52), 3C (54-62), 3D (63-70),
4 (72-81), 5 (84-88), 6 (91-95), 7 (97-100),
8 (103-113), 9 (115-119), 10A (122-129),
10B (130-140), 10C (141-149);
Texture : PLAG-OL-CPX PHYRIC, SUBOPHITIC TEXTURE, GIVES ROCK
MOTTLED APPEARANCE, GROUNDMASS MEDIUM TO COARSE-
GRAINED;
Structure : NARROW VEINS OF CARB + SMEC, FRACTURED BASALT AND
NETWORK VEINING OF CARB IN PCE 3B, VEINLETS FILLED
WITH SMEC IN PCES 10A-C;
Alteration : MODERATELY
LARGE COATING OF SLICKENSIDED SMEC IN PCE 3D;
Comments : SEE THIN SECTION DESCRIPTION FOR MODES;
Vesicles : Size(mm): 1-3 Percent: 1
Location: Filling: CARB,SMEC
MOSTLY FILLED WITH CARB IN PCES 8-10C;
Groundmass : OLIVINE ( 2%)
Size(mm): 0.05-0.1
EUHEDRAL;
PLAGIOCLASE ( 15%)
Size(mm): 0.01-0.4
EUHEDRAL TO SUBHEDRAL;
CLINOPYROXENE ( 15%)
Size(mm): 0.005-0.3
EUHEDRAL TO SUBHEDRAL;
MAGNETITE ( 5%)
Size(mm): 0.005-0.01
IRREGULAR RODS;
GLASS ( 5-10%)
TACHYLITIC;
Phenocrysts: PLAGIOCLASE ( 24%)
Size(mm): <7
OLIVINE ( 2%)
Size(mm): 0.2-0.6
ALTERED TO SMEC AND IN CLOTS WITH PLAG+CPX;
CLINOPYROXENE ( 24%)
Size(mm): 0.3-0.8
SUBOPHITIC TO OPHITIC CLOTS;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1180 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 540.68
Core: 48 Top of Core Depth (m) : 532.00
Sect: 6 Top of Section Depth(m): 539.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (1-11), 1B (11-22), 2A (23-44), 2B (44-51),
3A (53-65), 3B (67-77), 4A (79-90), 4B (90-107),
4C (107-111), 4D (112-118);
Texture : PLAG-CPX-OL PHYRIC, GROUNDMASS MEDIUM-GRAINED,
SUBOPHITIC;
Structure : FINE VEINLETS OR CRACKS FILLED WITH SMEC OR CARB,
VEINS IN PCE 2A CONTAIN CARB+RADIATING ZEOLITE XTLS,
SLICKENSIDES IN PCES 4B-C AND CARB VEINS SHOWING
VERTICAL EXTENSION SUGGEST REVERSE FAULTING;
Alteration : SLIGHTLY;
Comments : SEE THIN SECTION DESCRIPTION FOR MODES;
Vesicles : Size(mm): <2 Percent: 5-10
Location: Filling: SMEC,CARB
SOME SHOW GEOPETAL STRUCTURE WITH CONCAVE UPWARD
CONTACT OF CARB AND SMEC BELOW;
Groundmass : PLAGIOCLASE ( 20%)
LATHS;
CLINOPYROXENE ( 20%)
HETEROMORPHIC;
MAGNETITE ( 5-10%)
EUHEDRAL;
GLASS ( 5%)
PYRITE
Phenocrysts: PLAGIOCLASE ( 25%)
Size(mm): 1-3
ZONED;
OLIVINE ( 5%)
Size(mm): 0.5-2
ALTERED, EUHEDRAL;
CLINOPYROXENE ( 20%)
Size(mm): 0.5-1
HETEROMORPHIC;
Replacement: SMECTITE
CARBONATE
ZEOLITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 980 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 541.98
Core: 48 Top of Core Depth (m) : 532.00
Sect: 7 Top of Section Depth(m): 541.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-37), 2 (41-43), 3 (45-49), 4 (51-55),
5 (59-63), 6A (65-75), 6B (76-98);
Texture : PLAG-CPX-OL PHYRIC, INTERGRANULAR TO SUBOPHITIC,
GROUNDMASS COARSE-GRAINED;
Structure : VEINS FILLED BY CARB WITH SMEC LINING;
Alteration : SLIGHTLY;
Vesicles : Size(mm): 0.5-1 Percent: 1-2
Location: Filling: CARB
Groundmass : PLAGIOCLASE
CLINOPYROXENE
MAGNETITE
Phenocrysts: PLAGIOCLASE ( <5%)
Size(mm): <6
OLIVINE ( 1-2%)
Size(mm): <4
ALTERED TO SMEC;
CLINOPYROXENE ( 1-2%)
Size(mm): <4
OCCUR IN GLOMEROCRYSTS <10MM;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 540.49
Core: 49 Top of Core Depth (m) : 539.00
Sect: 1 Top of Section Depth(m): 539.00
LITHOLOGY: APHYRIC TO PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (4-6), 2 (9-25), 3 (27-42), 4 (45-53),
5 (55-66), 6A (68-73), 6B (72-82), 6C (82-83),
7 (87-89), 8A (92-102), 8B (101-113), 8C (114-122),
8D (123-146), 8D1 (143-149);
Texture : APHYRIC TO PLAG-OL-CPX MODERATELY PHYRIC, GROUNDMASS
MEDIUM-GRAINED;
Structure : VEINS FILLED WITH BROWN TO GREEN SMEC UP TO 1CM,
SUBHORIZONTAL VEIN OF CARB IN PCE 5, POSSIBLE
COOLING BREAK BETWEEN CORES 48 AND 49;
Alteration : MODERATELY;
Vesicles : Size(mm): Percent: <5
Location: Filling: CARB, SMEC
Phenocrysts: PLAGIOCLASE ( <5%)
Size(mm): <5
OLIVINE ( <5%)
Size(mm): 1-2
ALTERED TO SMEC+IDDINGS;
CLINOPYROXENE ( <3%)
Size(mm): <5
Replacement: SMECTITE
Minerals Replaced: OL
IDDINGSITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 541.96
Core: 49 Top of Core Depth (m) : 539.00
Sect: 2 Top of Section Depth(m): 540.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT AND BRECCIA;
MASSIVE;
Piece No. : PCE 1 (2-27), 2A (29-36), 2B (37-49), 3A (52-70),
3B (66-77), 4 (80-97), 5A (99-101), 5B (101-105),
5C (105-106), 6 (109-122), 7 (125-146);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, BRECCIA OCCURS IN PCE
4-7, GROUNDMASS COARSE-GRAINED, OPHITIC;
Structure : VEINS FILLED WITH GREEN AND BROWN SMEC, PCES 2A AND
3A SHOW SIGNS OF SLICKENSIDES ALONG VEINS;
Alteration : MODERATELY
VEINS OXIDIZED IN PCES (5,17,54,115CM) TO BROWNER
COLOR, ROCK STAINED TO 10MM ON EITHER SIDE OF
LARGE VEINS OR BROKEN SURFACES;
Vesicles : RARE VESICLES FILLED WITH CARB;
Phenocrysts: PLAGIOCLASE ( <5%)
Size(mm): <5
CLINOPYROXENE ( <3%)
Size(mm): <5
AUGITE;
OLIVINE ( <2%)
ALTERED TO SMEC OR IDDINGS;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
IDDINGSITE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/ 860 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 542.86
Core: 49 Top of Core Depth (m) : 539.00
Sect: 3 Top of Section Depth(m): 542.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (4-15), 2 (18-30), 3 (32-40), 4A (42-53),
4B (52-64), 5 (67-75), 6 (77-86);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, GROUNDMASS COARSE-
GRAINED;
Structure : NUMEROUS THIN VEINS FILLED WITH GREEN SMEC+CARB,
LARGER VEINS FILLED WITH CARB PLUS LINING OF DARK
GREEN TO YELLOW TO BROWN SMEC (10,25,55,70CM);
Alteration : MODERATELY
BROWN STAINING NEAR VEINS;
Vesicles : RARE;
Groundmass : OLIVINE
PLAGIOCLASE
CLINOPYROXENE
MAGNETITE
GLASS
Phenocrysts: PLAGIOCLASE ( <5%)
Size(mm): <3
CLINOPYROXENE ( <2%)
Size(mm): <3
AUGITE;
OLIVINE ( <2%)
Size(mm): <3
OCCUR IN GLOMEROCRYSTS;
Replacement: SMECTITE
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1200 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 546.20
Core: 50 Top of Core Depth (m) : 545.00
Sect: 1 Top of Section Depth(m): 545.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-20), 2 (22-30), 3 (33-50), 4 (53-59),
5 (62-71), 6 (74-87), 61 (88-89), 7 (92-109),
8 (102-107), 9 (111-120);
Texture : PLAG-CPX-OL PHYRIC, GROUNDMASS MICROLITIC;
Structure : MODERATELY TO STRONGLY FRACTURED, FISSURES FILLED
WITH GREEN TO BROWN SMEC, NUMEROUS VEINS FILLED WITH
GREEN TO BROWN SMEC AND COMMONLY DIP 60 DEGREES
TO THE HORIZONTAL, PCE 4 CONTAINS HORIZONTAL
SLICKENSIDES, PCE 5 DISPLAYS SLICKENSIDES THAT DIP
65 DEGREES PITCH 45 DEGREES AND SUGGEST NORMAL AND
RIGHT LATERAL COMPONENTS OF MOTION;
Alteration : MODERATELY;
Vesicles : RARE;
Phenocrysts: PLAGIOCLASE ( <15%)
Size(mm): <5
RARELY TO 8MM;
CLINOPYROXENE ( 5-10%)
Size(mm): <5
RARELY TO 8MM;
OLIVINE ( 5%)
Size(mm): <2
LOCALLY 10-15% IN PCES 4-6;
Replacement: SMECTITE
PYRITE
PCE 9;
Leg : 52 Top/Bottom Interval(mm): 0/1360 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 547.86
Core: 50 Top of Core Depth (m) : 545.00
Sect: 2 Top of Section Depth(m): 546.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (3-43), 2 (46-80), 3A (82-108), 3B (107-118),
4A (123-129), 4B (130-136);
Texture : PLAG-CPX-OL PHYRIC, TRACES OF BRECCIA IN PCES 1 AND
4A, PCE 4A CONTAINS A BRECCIATED BAND OF APHYRIC
BASALT, GROUNDMASS INTERGRANULAR TO INTERSERTAL;
Structure : VEINS CONTAIN LOCALLY COMPLEX FILLINGS OF CARB+SMEC
AND MINOR BRECCIA AND NUMEROUS SLICKENSIDES;
Alteration : MOD
FROM 0-30CM AND 42-52CM AND 87-136CM;
FRESH
REST OF SECTION;
Vesicles : Size(mm): 1 Percent: <1
CRESCENTIC FILLINGS COMMON BUT VARY RANDOMLY IN
ORIENTATION WITHIN SINGLE PIECES;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
CLINOPYROXENE ( 5%)
Size(mm): <3
AUGITE;
OLIVINE ( 5%)
Size(mm): <3
REPLACED BY SMEC OR CARB;
PHENOS COMMONLY SERIATE, TEND TO OCCUR IN
GLOMEROCRYSTS <10MM WIDE;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1300 Analyst: Bryan, W.
Hole: 417D Sample Midpoint (m) : 549.80
Core: 51 Top of Core Depth (m) : 548.50
Sect: CC Top of Section Depth(m): 548.60
LITHOLOGY: PLAG-CPX-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (1-13);
Texture : PLAG-CPX-OL SPARSELY PHYRIC, GROUNDMASS
HOLOCRYSTALLINE AND LOCALLY APHANITIC WITH PLAG
MICROPHENOS;
Structure : VEINS FILLED WITH GREEN SMEC+CARB, NARROW ALTERATION
HALOS ALONG VEINS;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
RARE PARTIALLY RESORBED PLAG MEGACRYSTS CONTAIN
INCLUSIONS OF EUHEDRAL SPINEL;
CLINOPYROXENE
OLIVINE
ALTERED PHENOS MINOR;
Replacement: SMECTITE
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1370 Analyst:
Hole: 417D Sample Midpoint (m) : 559.37
Core: 52 Top of Core Depth (m) : 558.00
Sect: 1 Top of Section Depth(m): 558.00
LITHOLOGY: PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (1-11), 1B (12-35), 1C (36-48), 1D (49-53),
1E (54-74), 1F (74-86), 1G (86-94), 1G1 (94-98),
1H1 (99-102), 1H (101-115), 1I (116-137);
Texture : PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC, GNDMASS
INTERSERTAL;
Structure : VEINS FILLED WITH CARB AND/OR SMEC AND PYRITE;
Alteration : MOD
FROM 49-65CM, 92-137CM;
FRESH
REST OF SECTION, ALTERED TO GREY-BROWN TO A DEPTH
OF 5MM ALONG VEINS IN PCES 1D-E AND 1G-I;
Vesicles : Size(mm): Percent: RARE
Phenocrysts: PLAGIOCLASE
Size(mm): 1-5
CLINOPYROXENE
Size(mm): <5
AUGITE;
OLIVINE
Size(mm): <4
REPLACED BY GREEN SMEC+CARB;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
PYRITE
PRESENT AS RARE ANHEDRAL GRANULES;
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 561.00
Core: 52 Top of Core Depth (m) : 558.00
Sect: 2 Top of Section Depth(m): 559.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (1-20), 1B (19-24), 1C (25-53), 1D (52-79),
1E (81-102), 1F (103-110), 1G (110-117),
1G1 (117-129), 1H (130-138), 1H1 (140-149);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS MEDIUM TO
COARSE-GRAINED;
Structure : STEEPLY DIPPING VEINS FILLED WITH SMEC AND/OR FINE
TO COARSELY CRYSTALLINE CARB;
Alteration : MOD
PCE 1A AND 1D-F;
FRESH
REST OF SECTION;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <5
CLINOPYROXENE ( 3%)
OLIVINE ( 2-3%)
Size(mm): <3
INCREASE TO 5-8% IN (19-36, 40-60, 95-98, 112-114,
128-135CM);
PHENOS COMMONLY IN GLOMEROCRYSTS;
Replacement: SMECTITE
CARBONATE
PYRITE
THROUGHOUT GNDMASS AND CONCENTRATED IN PCE 1A
ALONG VEIN AT 16CM;
Leg : 52 Top/Bottom Interval(mm): 0/1440 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 562.44
Core: 52 Top of Core Depth (m) : 558.00
Sect: 3 Top of Section Depth(m): 561.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-9), 1A1 (10-22), 1B (23-37), 1C (39-60),
1D (60-74), 1E (75-85), 1F (85-96), 1F1 (97-101),
1G (101-127), 1H (127-144);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, APHYRIC INTERVAL AT
30-37CM, GNDMASS FINE-GRAINED BETWEEN 108-144CM,
MEDIUM-GRAINED WITH SUBOPHITIC CLOTS BETWEEN 0-108
CM;
Structure : VEINS FILLED WITH CARB, LINED WITH GREEN SMEC;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): 3-5
LOCALLY TO 8MM;
CLINOPYROXENE ( 2-3%)
Size(mm): 2-3
OLIVINE ( 3-4%)
Size(mm): <7
REPLACED BY GREEN SMEC, CONCENTRATED AS SINGLE
XTLS OR GLOMEROCRYSTS IN (15-21, 49-62, 118-122CM)
( FROM%)
Size(mm): 127-145CM
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
DISSEMINATED THROUGHOUT SECTION;
Leg : 52 Top/Bottom Interval(mm): 0/ 270 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 562.77
Core: 52 Top of Core Depth (m) : 558.00
Sect: 4 Top of Section Depth(m): 562.50
LITHOLOGY: PLAG-OL-PYX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-19), 1B (19-27);
Texture : PLAG-OL-PYX MODERATELY PHYRIC, MINOR BRECCIA IN PCE
1B, GNDMASS FINE-GRAINED, CHILLED GLASSY MARGIN;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE
OLIVINE
PYROXENE
SEE THIN SECTION DESCRIPTION;
Leg : 52 Top/Bottom Interval(mm): 290/1460 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 563.96
Core: 52 Top of Core Depth (m) : 558.00
Sect: 4 Top of Section Depth(m): 562.79
LITHOLOGY: PLAG-CPX-OL MODERATELY TO PHYRIC BASALT;
PILLOW;
Piece No. : PCE 2 (29-32), 3A (34-40), 3B (40-47), 4 (49-54),
5 (56-72), 6 (74-83), 7 (85-90), 8 (92-98),
9 (102-110), 10 (112-121), 11A (122-131),
11B (132-146);
Texture : PLAG-CPX-OL MODERATELY TO PHYRIC, GNDMASS FINE-
GRAINED, CHILLED GLASSY MARGINS IN PCES 3 AND 7-8;
Structure : VEINS FILLED WITH GREEN SMEC + CARB, INTERVAL 33-48
CM IS A COMPLETE PILLOW;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 10
Location: Filling: SMEC,CARB
PCE 10, IRREGULAR SHAPE;
Phenocrysts: PLAGIOCLASE
Size(mm): <5
CLINOPYROXENE
Size(mm): <5
OLIVINE ( <10%)
Size(mm): 1-3
PHENOS OCCUR SINGLY OR AS SUBOPHITIC INTERGROWTHS
<8MM ACROSS, TOTAL 20-35%;
Replacement: SMECTITE
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 565.49
Core: 52 Top of Core Depth (m) : 558.00
Sect: 5 Top of Section Depth(m): 564.00
LITHOLOGY: PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (1-19), 2 (22-34), 3 (37-43), 4 (47-50),
5A (51-60), 5B (62-66), 6 (69-79), 7 (82-85),
8 (87-92), 9 (93-102), 10A (105-110), 10B (111-119),
11 (123-126), 12 (128-132), 13A (135-140),
13B (141-149);
Texture : PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC, TRACES
OF HYALOCLASTIC BRECCIA CONTAINING FRAGMENTS OF
BAKED CLAY IN PCE 11, GNDMASS FINE TO MEDIUM
GRAINED, CHILLED MARGINS IN PCES (1,5A,10,13A),
Structure : VEINS FILLED BY BROWN SMEC;
Alteration : SLIGHTLY
CHILLED MARGINS REPLACED BY GREEN SMEC + CARB,
LOCALLY CONTAIN FRESH GLASS;
Phenocrysts: PLAGIOCLASE
Size(mm): <4
CLINOPYROXENE
Size(mm): <3
OLIVINE
Size(mm): <3
REPLACED BY GREEN SMEC+CARB,
PHENOS OCCUR SINGLY OR AS SUBOPHITIC INTERGROWTHS
OCCASIONALLY STELLATE <6MM ACROSS, TOTAL 10-15%;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
PATCHES ON PCE 2 AND 13B;
Leg : 52 Top/Bottom Interval(mm): 0/1440 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 566.94
Core: 52 Top of Core Depth (m) : 558.00
Sect: 6 Top of Section Depth(m): 565.50
LITHOLOGY: PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-9), 1B (9-16), 1C (16-32), 2 (35-42),
3 (44-52), 4 (54-65), 5 (68-80), 6A (82-90),
6B (90-97), 6C (98-111), 6C1 (107-114),
6D (115-119), 6E (120-129), 7 (132-144);
Texture : PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC, GNDMASS
FINE TO MEDIUM GRAINED, CHILLED MARGINS CONTAINING
TRACES OF GLASS IN PCES 5 AND 6A;
Structure : VEINS FILLED WITH CARB AND LINED WITH GREEN SMEC;
Alteration : MOD
CHILLED MARGINS ALTERED;
Vesicles : PCE 2 CONTAINS VUGS FILLED WITH GREEN SMEC AND
EUHEDRAL CALCITE;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1040 Analyst:
Hole: 417D Sample Midpoint (m) : 568.04
Core: 52 Top of Core Depth (m) : 558.00
Sect: 7 Top of Section Depth(m): 567.00
LITHOLOGY: PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-15), 2A (17-29), 2B (30-35), 3 (38-43),
4A (45-53), 4B (53-62), 5 (63-70), 6 (72-80),
7 (86-89), 8 (91-97), 9 (99-104);
Texture : PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC, GNDMASS
FINE-GRAINED, CHILLED MARGINS IN PCES (1,2A,4A,6,7);
Structure : VEINS <1CM WIDE FILLED WITH CARB + GREEN SMEC;
Alteration : MOD
ALTERATION ALONG VEINS AND CHILLED MARGINS;
Vesicles : Size(mm): <2 Percent:
PCE 2;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Size(mm): 2-5
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 568.92
Core: 53 Top of Core Depth (m) : 567.50
Sect: 1 Top of Section Depth(m): 567.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-15), 1B (15-33), 1C (34-46), 2 (49-60),
3 (64-68), 4A (71-81), 4B (81-86), 4C (86-92),
4D (92-97), 5A (100-117), 5B (118-129),
5C (129-138), 5D (139-142);
Texture : PLAG-CPX-OL PHYRIC, MINOR INTERPILLOW BRECCIA IN
PCES (1A,2,3,4A,4D,5A), GNDMASS FINE-GRAINED,
CHILLED GLASSY MARGINS;
Structure : VEINS FILLED WITH CARB;
Alteration : MOD;
Vesicles : Size(mm): 1-3 Percent: 5
SMALLER VESICLES (1MM) FILLED WITH CARB+GREEN
SMEC, LARGER AND MORE IRREGULAR FILLED WITH CARB
AND LINED WITH GREEN SMEC;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
CLINOPYROXENE ( 10%)
Size(mm): <5
EUHEDRAL TO ANHEDRAL, OFTEN IN GROWTHS WITH PLAG;
OLIVINE ( 5%)
Size(mm): <2
EUHEDRAL, ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 570.50
Core: 53 Top of Core Depth (m) : 567.50
Sect: 2 Top of Section Depth(m): 569.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A1 (4-6), 1A (7-14), 1B (15-17), 1C (18-21),
1D (23-30), 2A (32-39), 2B (40-46), 2C (46-54),
3 (57-60), 4A (62-72), 4B (65-76), 5 (78-89),
6 (92-103), 7 (107-115);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO GLASSY, ALTERED CHILLED MARGINS IN PCES (1D,2A,
4A,7);
Structure : VEINS FILLED WITH SMEC + CARB;
Alteration : SLIGHTLY
FRESH GLASS IN PCE 4A, BASALT FRAGMENTS IN PCE 6
STRONGLY ALTERED;
Vesicles : VESICLES FILLED WITH CARB IN PCES 1B-C AND 2A;
Phenocrysts: PLAGIOCLASE ( 4-8%)
Size(mm): <2
CLINOPYROXENE ( 1-2%)
PRESENT IN GLOMEROCRYSTS WITH PLAG;
OLIVINE ( 1-2%)
Size(mm): <1
ALTERED TO GREEN SMEC;
Replacement: CARBONATE
IN PATCHES BETWEEN 78-82CM;
SMECTITE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 578.49
Core: 54 Top of Core Depth (m) : 577.00
Sect: 1 Top of Section Depth(m): 577.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-14), 1B (15-23), 2 (25-37), 3 (41-43),
4A (46-57), 4B (58-62), 4C (64-66), 5 (71-84),
6A (86-96), 6B (97-103), 7 (106-123), 8 (125-129),
9 (132-140), 10 (143-149);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED, CHILLED
MARGINS IN PCES 1-5 AND 9;
Structure : PCE 1 CONTAINS A VEIN FILLED WITH PYRITE + CARB,
VEINS FILLED WITH CARB + BROWN SMEC;
Alteration : MOD
FRESH GLASS IN PCES (1,4A,5,9), BROWN ALTERATION
HALOS EXTENDING TO DEPTH 1CM ALONG VEINS;
Vesicles : Size(mm): <0.5 Percent:
Location: Filling: CARB
COMMON, PCE 4B CONTAINS 2CM VUG FILLED WITH OLIVE
GREEN ZEOLITES;
Phenocrysts: PLAGIOCLASE (10-15%)
CLINOPYROXENE ( 5%)
AUGITE;
OLIVINE ( 5%)
REPLACED BY GREEN SMEC + CARB;
ALL PHENOS COMMONLY IN SUBOPHITIC CLOTS <5MM;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Minerals Replaced: OL
PYRITE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 579.99
Core: 54 Top of Core Depth (m) : 577.00
Sect: 2 Top of Section Depth(m): 578.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-4), 2A (6-23), 2B (23-30), 3A (31-46),
3B (46-55), 4A (57-61), 4B (62-67), 5A (70-77),
5B (77-87), 5C (86-92), 6A (94-103), 6B (103-104),
7 (106-116), 8 (119-124), 9A (126-140),
9B (140-149);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS APHANITIC TO FINE
GRAINED, BRECCIA IN PCES 4 AND 5A COMPOSED OF
FRAGMENTS OF GLASS REPLACED BY GREEN SMEC IN A DARK
BROWN MATRIX OF ALTERED GLASS AND SMEC, GLASSY
CHILLED MARGINS IN PCES (1,2A,4,5A,6,7);
Alteration : SLIGHTLY;
Vesicles : Size(mm): <1 Percent:
Location: Filling: CARB,SMEC
Shape : IRREGULAR
Location: Filling: CARB
Shape : ROUND
SMALLER, PCE 8 CONTAINS 2CM CARB-FILLED VUG;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): 2-8
EUHEDRAL;
CLINOPYROXENE ( 3-5%)
Size(mm): <4
EUHEDRAL, COMMONLY IN GLOMEROCRYSTS <8MM WITH
PLAG;
OLIVINE ( <5%)
Size(mm): 1-2
EUHEDRAL, ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 581.49
Core: 54 Top of Core Depth (m) : 577.00
Sect: 3 Top of Section Depth(m): 580.00
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 581.49
Core: 54 Top of Core Depth (m) : 577.00
Sect: 3 Top of Section Depth(m): 580.00
LITHOLOGY: PILLOW;
Piece No. : PCE 1A (2-12), 1B (12-17), 2 (20-24), 3 (27-32),
4A (34-53), 4B (54-59), 4C (59-72), 5 (74-77),
6 (79-84), 7A (86-96), 7B (96-111), 7C (112-130),
8 (133-149);
Texture : PLAG-PYX-OL PHYRIC, MINOR INTERPILLOW BRECCIA IN PCE
3, GNDMASS APHANITIC TO FINE-GRAINED, BRECCIA MADE
OF GLASS FRAGMENTS CEMENTED BY GLASS AND SMEC+CARB,
CHILLED MARGINS IN PCES (1B,2,4A,5);
Structure : MINOR VEINS FILLED WITH CARB+SMEC (DARK GREEN);
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 1-3
Location: Filling: CARB,SMEC
Groundmass : PLAGIOCLASE ( <5%)
Size(mm): 2-4
MICROLITES;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): 5-9
PYROXENE ( 5-8%)
Size(mm): 1-4
COMMONLY IN GLOMEROCRYSTS WITH PLAG, EUHEDRAL;
OLIVINE ( <5%)
Size(mm): 1-2
EUHEDRAL;
Replacement: SMECTITE
Minerals Replaced: GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1450 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 582.95
Core: 54 Top of Core Depth (m) : 577.00
Sect: 4 Top of Section Depth(m): 581.50
LITHOLOGY: PLAG-CPX-OL PHYRIC;
PILLOW;
Piece No. : PCE 1A (1-10), 1B (10-24), 1C (25-39), 1D (40-45),
2 (48-59), 3A (61-72), 3B (72-85), 4 (87-99),
5A (102-111), 5B (112-122), 5C (123-133),
5D (135-145);
Texture : PLAG-CPX-OL PHYRIC, CHILLED GLASSY MARGINS IN PCES
(1A,1B,1D,2,5D);
Structure : VEINS FILLED WITH CARB AND LINED WITH GREEN TO
BROWN SMEC, PYRITE PRESENT AS VEIN FILLING;
Alteration : SLIGHTLY;
Vesicles : Size(mm): <0.5 Percent:
Location: Filling: CARB,SMEC
COMMON;
Groundmass : PYRITE
DISSEMINATED GRAINS <0.05MM;
Phenocrysts: PLAGIOCLASE ( 10%)
CLINOPYROXENE ( 5%)
AUGITE;
OLIVINE ( 5%)
ALTERED TO SMEC, PHENOS OCCUR IN SUBOPHITIC CLOTS
<6MM ACROSS;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1390 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 584.39
Core: 54 Top of Core Depth (m) : 577.00
Sect: 5 Top of Section Depth(m): 583.00
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-15), 1B (15-21), 2A (23-30), 2B (30-56),
2C (57-61), 2D (62-80), 2E (81-101), 2F (102-109),
2G (110-114), 3A (117-125), 3B (127-139);
Texture : PLAG-PYX-OL PHYRIC, GNDMASS APHANITIC TO FINE
GRAINED, CHILLED GLASSY MARGINS IN PCES 1-2;
Structure : INTERVAL 0-22 REPRESENTS A COMPLETE PILLOW BOUNDED
BY WELL PRESERVED MARGINS, MINOR VEINS FILLED WITH
CARB + DARK GREEN SMEC, LARGE INTERPILLOW FILLING IN
PCE 1 CONTAINS CARB + ZEOLITE;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <10
PYROXENE ( 3-5%)
Size(mm): 2-3
EUHEDRAL, TEND TO OCCUR IN GLOMEROCRYSTS WITH
PLAG;
OLIVINE ( <5%)
Replacement: SMECTITE
CARBONATE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1350 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 585.85
Core: 54 Top of Core Depth (m) : 577.00
Sect: 6 Top of Section Depth(m): 584.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (1-18), 1B (18-35), 1C (35-47), 1D (47-54),
1E (54-64), 1F (64-72), 2A (73-80), 2B (80-102),
3 (104-112), 4 (115-125), 5 (128-135);
Texture : PLAG-CPX-OL PHYRIC, CHILLED GLASSY MARGINS IN PCES
1C-D;
Structure : VEINS FILLED WITH CARB AND LINED WITH DARK GREEN TO
BROWN SMEC;
Alteration : SLIGHTLY
GNDMASS WEAKLY TO MODERATELY ALTERED;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <6
CLINOPYROXENE ( 5%)
Size(mm): 2-3
AUGITE;
OLIVINE ( 3-7%)
Size(mm): 2-3
ALTERED TO SMEC + CARB;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 587.92
Core: 55 Top of Core Depth (m) : 586.50
Sect: 1 Top of Section Depth(m): 586.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (0-20), 2 (20-27), 3A (28-38), 3B (39-47),
3C (45-53), 4 (57-60), 5 (62-77), 6 (79-92),
7A (94-102), 7B (102-109), 7C (109-118),
8 (120-125), 9 (126-142);
Texture : PLAG-CPX-OL PHYRIC, MINOR BRECCIA IN PCES 4-5
CONTAINS CARB + MONTMORILLONITE + GREEN SMEC,
GNDMASS FINE-GRAINED TO GLASSY, GLASSY CHILLED
MARGINS IN PCES 2 AND 3A;
Structure : VEINS COMMON <1MM AND FILLED WITH SMEC + CARB;
Alteration : SLIGHTLY;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
MICROLITES;
PYROXENE
OLIVINE
ALTERED, MATRIX OF FRESH TO ALTERED GLASS;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <5
EUHEDRAL;
CLINOPYROXENE ( 3%)
Size(mm): <2
ANHEDRAL AUGITE;
OLIVINE ( 2%)
Size(mm): <3
EUHEDRAL, ALTERED TO GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
MONTMORILLONITE
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 589.42
Core: 55 Top of Core Depth (m) : 586.50
Sect: 2 Top of Section Depth(m): 588.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-26), 2 (28-54), 3 (56-73), 4 (76-101),
5 (104-132), 6 (136-142);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS GLASSY TO FINE-GRAINED
WITH GLOMEROPHYRIC OR SUBOPHITIC CLOTS, GLASSY
CHILLED MARGINS IN PCES 2 AND 6;
Structure : PCE 5 CONTAINS A LARGE COMPLEX VEIN FILLED WITH
PYRITE+CARB+SMEC;
Alteration : SLIGHTLY;
Vesicles : Size(mm): 0.5 Percent:
Location: Filling: CARB,SMEC
COMMON;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <10
CLINOPYROXENE ( 5%)
Size(mm): <7
SUBOPHITIC AUGITE CLOTS;
OLIVINE ( 5%)
ALTERED TO SMEC+CARB;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Minerals Replaced: OL
PYRITE
DISCRETE GRAINS 0.5MM;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 590.97
Core: 55 Top of Core Depth (m) : 586.50
Sect: 3 Top of Section Depth(m): 589.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (4-7), 2A (10-22), 2B (23-27), 3 (30-38),
4 (42-49), 5 (52-63), 6 (65-77), 7A (80-96),
7B (96-106), 8 (107-120), 9 (123-132),
10 (135-147);
Texture : PLAG-CPX-OL PHYRIC;
Structure : GLASSY CHILLED MARGINS IN PCES 1 AND 3, VEINS FILLED
WITH SMEC OR LINED WITH SMEC AND A CORE OF CARB;
Alteration : MOD
GLASSY MARGINS AND GNDMASS LOCALLY OXIDIZED ALONG
VEINS;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CARB,SMEC
Groundmass : PLAGIOCLASE
MICROLITES;
CLINOPYROXENE
AUGITE, ALTERED TO SMEC;
OLIVINE
ALTERED TO SMEC;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
EUHEDRAL, OCCASIONALLY TO 8MM;
CLINOPYROXENE ( 3%)
Size(mm): <2
ANHEDRAL AUGITE;
OLIVINE ( 2%)
Size(mm): <2
EUHEDRAL, ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: CPX,OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Bryan, W.
Hole: 417D Sample Midpoint (m) : 592.47
Core: 55 Top of Core Depth (m) : 586.50
Sect: 4 Top of Section Depth(m): 591.00
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-13), 2 (17-32), 3A (35-41), 3B (42-47),
4A (52-67), 4B (68-80), 5 (83-99), 6 (103-112),
7A (115-119), 7B (120-125), 8 (130-137),
9 (141-147);
Texture : PLAG-PYX-OL PHYRIC, GNDMASS HOLOCRYSTALLINE WITH
OCCASIONAL GLOMEROCRYSTS OF PLAG+PYX, GLASSY MARGINS
INTERMIXED WITH CARB IN PCES 1-2;
Structure : VEINS FILLED WITH CARB + MINOR PYRITE;
Alteration : SLIGHTLY
GNDMASS FRESH EVEN ALONG VEINS;
Phenocrysts: PLAGIOCLASE
EUHEDRAL;
PYROXENE
LARGE <7MM AND ABUNDANT IN PCE 7;
OLIVINE
TOTAL PHENOS 15%;
Replacement: CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1300 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 593.80
Core: 55 Top of Core Depth (m) : 586.50
Sect: 5 Top of Section Depth(m): 592.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (4-12), 2 (16-37), 3 (41-55), 4 (57-63),
5 (66-75) 6 (78-88), 7 (92-102), 8 (106-115),
9 (118-130);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
SUBOPHITIC, CHILLED MARGINS IN PCES (1,2,6,7);
Alteration : MOD;
Vesicles : Size(mm): 0.5 Percent:
Location: Filling: SMEC,CARB
COMMON;
Phenocrysts: PLAGIOCLASE ( 7-10%)
CLINOPYROXENE ( 3-5%)
AUGITE,
PHENOS USUALLY UP TO 10MM IN SUBOPHITIC
GLOMEROCRYSTS;
OLIVINE ( 3-5%)
ALTERED TO SMEC AND MINOR CARB;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Minerals Replaced: OL
PYRITE
AS DISCRETE GRAINS 0.5MM;
Leg : 52 Top/Bottom Interval(mm): 0/ 390 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 596.39
Core: 56 Top of Core Depth (m) : 596.00
Sect: 1 Top of Section Depth(m): 596.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-3), 1B (4-7), 1C (9-10), 1D (8-11),
1E (13-17), 1F (17-19), 1G (19-23), 2 (27-39);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, GLOMEROPHYRIC;
Structure : VEINS FILLED WITH SMEC+CARB;
Alteration : MODERATELY;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
OCCUR IN GLOMEROPHYRIC CLOTS 2-3MM ACROSS;
Replacement: SMECTITE
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst:
Hole: 417D Sample Midpoint (m) : 606.97
Core: 57 Top of Core Depth (m) : 605.50
Sect: 1 Top of Section Depth(m): 605.50
LITHOLOGY: PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-5), 2A (7-17), 2B (17-19), 2C (19-24),
2C1 (22-26), 3 (29-37), 4A (40-59), 4B (60-77),
4C (77-89), 4D (90-98), 4E (100-112), 4E1 (112-118),
5 (122-124), 6 (127-131), 7 (133-141), 8 (144-147);
Texture : PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC, BRECCIA
IN PCES 7-8 COMPOSED OF FRAGMENTS OF BASALT IN A
MATRIX OF GREEN SMEC AFTER GLASS, CHILLED MARGIN IN
PCE 2A;
Structure : VEINS COMMON AND FILLED WITH CARB + SMEC;
Alteration : MOD;
Vesicles : Size(mm): <2 Percent:
Location: Filling: CARB,SMEC
PCE 1;
Phenocrysts: PLAGIOCLASE
Size(mm): <5
GLOMEROCRYSTS;
CLINOPYROXENE
Size(mm): <2
OLIVINE
Size(mm): <4
ALTERED;
Replacement: SMECTITE
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1350 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 608.35
Core: 57 Top of Core Depth (m) : 605.50
Sect: 2 Top of Section Depth(m): 607.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-10), 2 (12-21), 3 (25-36), 4 (38-41),
5 (44-50), 6 (53-56), 7 (57-68), 8 (71-79),
9A (81-95), 9B (95-106), 9C (106-125),
9C1 (114-125), 9D (126-133), 9D1 (126-135);
Texture : PLAG-CPX-OL PHYRIC, BRECCIA IN PCES (1,3,6)
COMPOSED OF ALTERED BASALT FRAGMENTS IN GREEN SMEC
MATRIX DERIVED FROM SIDEROMELANE GLASS, GNDMASS
APHANITIC TO FINE-GRAINED INCREASING TO MEDIUM
GRAINED TOWARD PILLOW INTERIOR IN PCE 9, ALTERED
CHILLED MARGINS IN PCES 3 AND 9A;
Structure : VEINS FILLED BY BROWN SMEC OR CARB IN PCES 9B-C;
Alteration : MOD;
Vesicles : PCE 6 CONTAINS A CARB-FILLED VUG;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
CLINOPYROXENE ( 4%)
OCCASIONALLY WITH PLAG IN GLOMEROCRYSTS OR
SUBOPHITIC CLOTS <8MM;
OLIVINE ( 2%)
Size(mm): <2
INCREASE TO 3-5% IN PCES 9B-C, ALTERED TO GREEN
BROWN SMEC;
Replacement: SMECTITE
Size(mm): OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 609.98
Core: 57 Top of Core Depth (m) : 605.50
Sect: 3 Top of Section Depth(m): 608.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-15), 2 (18-32), 3 (35-38), 4 (42-60),
5A (63-74), 5B (75-82), 6 (85-91), 7 (93-95),
8 (100-105), 9 (107-114), 10 (116-122),
11 (123-126), 12 (127-135), 13 (138-142),
14 (144-148);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, ALTERED HYALOCLASTITE
BRECCIA IN PCES (2-5,7-12,14) COMPOSED OF SLIGHTLY
TO MODERATELY ALTERED BASALT IN A MATRIX OF GREEN
SMEC AND MINOR CARB, GNDMASS FINE TO MEDIUM GRAINED,
ALTERED GLASSY MARGIN IN PCE 6;
Structure : VEINS FILLED WITH GREEN SMEC;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
PLAG +CPX IN GLOMEROCRYSTS AND SUBOPHITIC CLOTS
<5MM ACROSS;
OLIVINE
Size(mm): <2
REPLACED BY SMEC AND HEMATITE, IDDINGS OR BROWN
SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1440 Analyst:
Hole: 417D Sample Midpoint (m) : 611.44
Core: 57 Top of Core Depth (m) : 605.50
Sect: 4 Top of Section Depth(m): 610.00
LITHOLOGY: PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-13), 2A (15-18), 2B (17-21), 3 (24-44),
4A (47-52), 4B (53-58), 5A (61-64), 5B (65-68),
6 (71-75), 7 (77-81), 8 (87-92), 9 (95-99),
10A (102-107), 10B (104-108), 11 (112-117),
111 (116-119), 12 (122-129), 13 (133-140),
14 (142-144);
Texture : PLAG-CPX-OL SPARSELY TO MODERATELY PHYRIC, ALTERED
HYALOCLASTITE BRECCIA IN PCE 1, GNDMASSS FINE-
GRAINED, BRECCIA COMPOSED OF BASALT FRAGMENTS CUT BY
VEINS OF SMEC + MONT + CARB + MATRIX OF SMEC;
Structure : NUMEROUS VEINS FILLED WITH CARB + GREEN SMEC;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
Size(mm): <5
SUBOPHITIC CLOTS;
CLINOPYROXENE
Size(mm): <5
OLIVINE
Size(mm): <7
ALTERED TO SMEC+CARB;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 616.48
Core: 58 Top of Core Depth (m) : 615.00
Sect: 1 Top of Section Depth(m): 615.00
LITHOLOGY: PYX-PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (4-5), 2A (8-13), 2B (14-16), 3A (18-23),
3B (23-33), 4 (36-39), 5A (42-53), 5B (52-60),
5C (60-74), 6A (78-86), 6B (76-91), 6C (92-96),
7 (98-105), 8 (108-116), 9 (120-124), 10 (127-132),
11 (135-143), 12 (146-148);
Texture : PYX-PLAG-OL MODERATELY PHYRIC, ALTERED HYALOCLASTITE
BRECCIA ALONG PILLOW MARGINS (PCES 2-4,8) COMPOSED
OF COARSE (0.5-3.0CM) FRAGMENTS OF BASALT OR GLASS
ALTERED TO GREEN SMEC IN A MATRIX OF DARK ALTERED
GLASS, GLASSY CHILLED MARGINS IN PCES (7,8,11);
Alteration : MOD;
Vesicles : MINOR VESICLES FILLED WITH DARK GREEN SMEC;
Phenocrysts: PYROXENE ( <5%)
Size(mm): <4
USUALLY <2MM;
PLAGIOCLASE
IN RARE GLOMEROCRYSTS WITH PLAG;
OLIVINE
Size(mm): <1
ALTERED TO GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 617.99
Core: 58 Top of Core Depth (m) : 615.00
Sect: 2 Top of Section Depth(m): 616.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-11), 2 (14-15), 3A (20-29), 3B (30-39),
4A (41-44), 4B (44-48), 5 (50-55), 6 (57-62),
7A (64-75), 7B (75-87), 7C (87-100), 7D (100-109),
7E (110-119), 7E1 (115-124), 7F (125-132),
7G (130-139), 7G1 (136-143), 8 (147-149);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS APHANITIC TO MEDIUM
GRAINED, BROKEN PILLOW BRECCIA IN PCE 3 COMPOSED OF
ANGULAR TO SUBROUNDED FRAGMENTS OF BASALT AND GLASS
(0-20MM ACROSS) IN A MATRIX OF DARK GREEN TO BROWN
SMEC + CARB, ALTERED CHILLED MARGINS IN PCES (3,6),
TABULAR SHARDS OF ALTERED GLASS ALIGNED SUBPARALLEL
TO PILLOW MARGINS IN PCE 3 REPRESENT EXFOLIATED
PILLOW MARGINS;
Structure : VEINS FILLED WITH BROWN SMEC + CARB;
Alteration : MOD
OXIDIZED TO A DEPTH OF 0.5-3.0MM ALONG VEINS;
Vesicles : PCE 8 CONTAINS A LARGE CARB-FILLED VUG;
Phenocrysts: COMBINATION ( 10%)
Size(mm): 2-3
PLAG+CPX, SUBOPHITIC CLOTS AND GLOMEROCRYSTS;
OLIVINE
Size(mm): <1
ALTERED TO GREEN SMEC, ALTERED TO RED-BROWN ALONG
OXIDIZED VEINS;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 619.49
Core: 58 Top of Core Depth (m) : 615.00
Sect: 3 Top of Section Depth(m): 618.00
LITHOLOGY: APHYRIC TO PYX-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (4-6), 2 (12-21), 3 (25-27), 4A (30-36),
4B (37-41), 4C (41-46), 5A (49-59), 5B (57-64),
5C (65-69), 6 (72-78), 7A (81-86), 7B (85-92),
7C (92-96), 7D (96-107), 7E (107-121),
7F (123-131), 7G (128-142), 7H (140-149);
Texture : APHYRIC TO PYX-OL MODERATELY PHYRIC;
Structure : MINOR BRECCIA FILLED VEINS IN PCES (1,4C,5), BRECCIA
COMPOSED OF FRAGMENTS OF BASALT AND GLASS ALTERED TO
GREEN SMEC IN A MATRIX OF DARK ALTERED GLASS+CARB,
PCES (2,3,7) CONTAIN VEINS FILLED WITH DARK GREEN
SMEC WITH WELL-PRESERVED SLICKENSIDES INDICATING
STRIKE-SLIP AND NORMAL FAULTING;
Alteration : MOD;
Vesicles :
Location: Filling: CARB
MINOR;
Phenocrysts: PYROXENE ( <3%)
Size(mm): 2-3
OLIVINE ( <1%)
Size(mm): 1-2
ALTERED;
Replacement: SMECTITE
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1450 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 620.95
Core: 58 Top of Core Depth (m) : 615.00
Sect: 4 Top of Section Depth(m): 619.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (1-12), 1B (11-15), 1C (15-24), 1C1 (23-27),
2 (30-35), 3A (37-41), 3B (40-45), 3C (46-49),
4 (52-58), 5A (64-68), 5B (68-72), 6 (74-81),
7 (84-87), 8 (90-101), 9A (104-111), 9B (110-112),
10 (115-124), 11A (128-131), 11B (130-133),
12 (137-144);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, BRECCIA COMPOSED OF
ANGULAR TO SUBROUNDED FRAGMENTS OF BASALT (1-30MM)
IN A MATRIX OF DARK GREEN SMEC (PCES 2,4,6),
SUBOPHITIC, GNDMASS MEDIUM GRAINED IN PCE 1 AND FINE
GRAINED THROUGHOUT REST OF SECTION;
Structure : VEINS FILLED WITH SMEC, SLICKENSIDES COMMON ALONG
VEINS;
Alteration : MOD;
Comments : CARB UNCOMMON, NOTED BY DESCRIBER THAT SLICKENSIDES
COULD HAVE FORMED BY DIFFERENT ROTATION DURING
DRILLING;
Vesicles : PCE 12 CONTAINS IRREGULAR VUGS <3MM FILLED WITH
SMEC AND WHITE ZEOLITE;
Phenocrysts: COMBINATION ( 5-10%)
Size(mm): 2
PLAG+CPX, SUBOPHITIC CLOTS AND GLOMEROCRYSTS;
OLIVINE ( <3%)
ALTERED TO GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
ZEOLITE
WHITE UNIDENTIFIED;
Leg : 52 Top/Bottom Interval(mm): 0/ 280 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 621.28
Core: 58 Top of Core Depth (m) : 615.00
Sect: 5 Top of Section Depth(m): 621.00
LITHOLOGY: APHYRIC TO PYX-OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (3-8), 1B (3-8), 2 (11-19), 3 (22-28);
Texture : APHYRIC TO PYX-OL SPARSELY PHYRIC;
Structure : VEINS FILLED WITH DARK GREEN SMEC;
Alteration : MOD;
Vesicles : IRREGULAR, FILLED WITH CARB + DARK GREEN SMEC;
Phenocrysts: PYROXENE
OLIVINE
Replacement: SMECTITE
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 625.47
Core: 59 Top of Core Depth (m) : 624.00
Sect: 1 Top of Section Depth(m): 624.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-17), 2 (21-26), 3 (29-35), 4 (38-47),
5 (51-59), 6A (62-69), 6B (69-75), 7A (78-85),
7B (85-91), 8A (94-102), 8B (102-125), 8C (125-138),
9 (141-147);
Texture : PLAG-CPX-OL PHYRIC BASALT, STRONGLY ALTERED BRECCIA
COMPOSED OF BASALT FRAGMENTS IN A MATRIX OF GREEN
SMEC AND MINOR CARB (PCES 6-8), GREEN SMEC IN
BRECCIA OXIDIZED TO RED TO YELLOW TO BROWN IN PCE 7,
GNDMASS RANGES FROM FINE-GRAINED IN PCE 1 TO
INTERGRANULAR IN PCE 8, CHILLED PILLOW MARGIN
REPLACED BY GREEN SMEC IN PCE 3;
Structure : VEINS FILLED WITH SMEC AND LOCALLY BY CARB (102CM),
SLICKENSIDES COMMON ALONG VEINS;
Alteration : MOD;
Vesicles : Size(mm): <0.5 Percent:
COMMON;
Phenocrysts: PLAGIOCLASE (10-20%)
Size(mm): <8
LATHS <1MM ACROSS AND SUBOPHITIC TO GLOMEROPHYRIC
CLOTS <8MM WITH AUGITE AND MINOR OL;
CLINOPYROXENE ( 5%)
AUGITE;
OLIVINE ( 5%)
Size(mm): <1
ANHEDRAL XTLS;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 626.97
Core: 59 Top of Core Depth (m) : 624.00
Sect: 2 Top of Section Depth(m): 625.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT AND BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1 (2-16), 2 (18-24), 3A (27-38), 3B (39-46),
3C (47-53), 3D (53-60), 3E (61-68), 4 (73-91),
5 (93-107), 6 (109-114), 7 (116-124), 8 (127-147);
Texture : PLAG-CPX-OL PHYRIC, BRECCIA ZONE BETWEEN 50-110CM
AND MINOR BRECCIATION THROUGHOUT REST OF SECTION,
BRECCIA COMPOSED OF BASALT FRAGMENTS IN A MATRIX OF
SMEC AND MINOR CARB, GNDMASS FINE TO MEDIUM GRAINED;
Structure : SMEC VEINS;
Alteration : MOD
USUALLY OXIDIZED ALONG VEINS;
Vesicles : Size(mm): Percent: <2
Location: Filling: CARB
PCES 4 AND 7;
Phenocrysts: PLAGIOCLASE (10-20%)
Size(mm): <4
CLINOPYROXENE ( 5%)
AUGITE;
OLIVINE ( 5%)
ALTERED, ALL PHENOS TEND TO OCCUR IN SUBOPHITIC
CLOTS BUT PLAG AND OL ALSO OCCUR AS ISOLATED LATHS
AND EUHEDRAL XTLS;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/ 750 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 627.75
Core: 59 Top of Core Depth (m) : 624.00
Sect: 3 Top of Section Depth(m): 627.00
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (3-11), 1B (12-20), 2 (24-29), 3 (32-46),
4A (47-52), 4B (52-63), 5A (65-75);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, BRECCIA IN PCES 1B-5A
COMPOSED OF ALTERED TO LOCALLY GLASSY FRAGMENTS
(PCE 4B) OF BASALT IN A MATRIX OF DARK GREEN SMEC,
GNDMASS FINE-GRAINED;
Alteration : MOD;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: CARB,SMEC
Groundmass : PARTIALLY ALTERED TO MONT AND GREEN TO BROWN SMEC;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): <3
CLINOPYROXENE ( 1%)
Size(mm): <1
ANHEDRAL AUGITE, PLAG AND CPX PARTIALLY REPLACED
BY GREEN SMEC + MONT + CARB;
OLIVINE ( 1%)
Size(mm): <1
EUHEDRAL, REPLACED BY GREEN SMEC + MONT AND CARB;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,CPX
MONTMORILLONITE
Minerals Replaced: OL,PLAG,CPX
CARBONATE
Minerals Replaced: OL,PLAG,CPX
Leg : 52 Top/Bottom Interval(mm): 660/1480 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 628.48
Core: 59 Top of Core Depth (m) : 624.00
Sect: 3 Top of Section Depth(m): 627.66
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 5B (66-83), 5C (75-83), 5D (83-92), 5E (84-96),
6A (98-111), 6B (111-121), 6C (122-126),
7 (129-148);
Texture : PLAG-CPX-OL PHYRIC, ALTERED BRECCIA COMPOSED OF
SMALL FRAGMENTS OF BASALT PARTIALLY REPLACED BY CLAY
AND CARB IN A MATRIX OF CLAY IN PCE 6, GLASSY MARGIN
IN PCE 4B;
Structure : VEINS FILLED WITH PYRITE;
Alteration : MOD
PCE 7 IS FRESH;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH LATHS;
CLINOPYROXENE ( 1-2%)
AUGITE;
OLIVINE ( 1-2%)
EUHEDRAL, REPLACED BY SMEC + MONT + CARB;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
MONTMORILLONITE
Minerals Replaced: OL
PYRITE ( 3%)
VEIN FILLINGS AND DISSEMINATED GRAINS;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 629.97
Core: 59 Top of Core Depth (m) : 624.00
Sect: 4 Top of Section Depth(m): 628.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1 (0-16), 2A (18-33), 2B (33-51), 3 (53-56),
4 (57-66), 5A (67-71), 5B (73-75), 5C (76-78),
6A (82-94), 6B (94-104), 7 (106-112), 8A (117-124),
8B (125-129), 9 (134-137);
Texture : PLAG-CPX-OL PHYRIC, ALTERED BRECCIA COMPOSED OF
SPARSELY TO MODERATELY PHYRIC BASALT FRAGMENTS
PARTIALLY REPLACED BY CLAY IN A LOCALLY OXIDIZED
CLAY MATRIX IN PCES 4-7, GNDMASS FINE-GRAINED;
Structure : VEINS FILLED WITH CARB + SMEC, PCE 9 STRONGLY
FRACTURED WITH A NETWORK OF SMEC-FILLED VEINS;
Alteration : MOD;
Vesicles : MINOR VESICLES FILLED WITH CARB AND LINED WITH
SMEC;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
CLINOPYROXENE ( 5%)
ANHEDRAL AUGITE, COMMONLY IN GLOMEROCRYSTS WITH
PLAG;
OLIVINE ( 3-5%)
Size(mm): <2
EUHEDRAL, REPLACED BY SMEC + CARB;
Replacement: SMECTITE
Minerals Replaced: OL
GNDMASS ALTERATION;
CARBONATE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 631.47
Core: 59 Top of Core Depth (m) : 624.00
Sect: 5 Top of Section Depth(m): 630.00
LITHOLOGY: PLAG-CPX-OL MODERATELY TO PHYRIC BASALT;
Piece No. : PCE 1 (2-10), 2 (12-27), 3 (28-38), 4 (41-57),
5 (60-75), 6 (78-87), 7A (90-102), 7B (103-116),
8 (120-127), 9A (130-140), 9B (140-147);
Texture : PLAG-CPX-OL MODERATELY TO PHYRIC, ALTERED BRECCIA
IN PCES (1-5,7A,8,9) COMPOSED OF FRAGMENTS OF BASALT
REPLACED BY CLAY IN A MATRIX OF CLAY AND MINOR CARB;
Structure : VEINS FILLED WITH SMEC;
Alteration : MOD;
Vesicles : Size(mm): 0.5 Percent: 1
Location: Filling: CARB
Phenocrysts: PLAGIOCLASE ( <10%)
Size(mm): <5
CLINOPYROXENE ( <5%)
Size(mm): <2
SUBHEDRAL AUGITE;
OLIVINE ( 1-2%)
Size(mm): <2
REPLACED BY CARB;
Replacement: SMECTITE
CARBONATE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Bryan, W.
Hole: 417D Sample Midpoint (m) : 632.97
Core: 59 Top of Core Depth (m) : 624.00
Sect: 6 Top of Section Depth(m): 631.50
LITHOLOGY: BASALTIC BRECCIA;
PLAG-PYX-OL MODERATELY PHYRIC BASALT FRAGMENTS;
Piece No. : PCE 1A (2-14), 1B (14-28), 1C (24-37), 2 (42-53),
3A (56-75), 3B (76-84), 4 (86-98), 5 (101-107),
6 (110-135), 7 (139-147);
Texture : BRECCIA COMPOSED OF ANGULAR TO SUBANGULAR FRAGMENTS
OF APHANITIC TO FINE-GRAINED MODERATELY PHYRIC
BASALT IN A MATRIX OF GREEN SMEC;
Structure : PCE 1B-C AND 6 CONTAIN SLICKENSIDED SURFACES AND
SMEC WHICH WRAP AROUND LARGER FRAGMENTS SUGGESTING
ADJUSTMENT DURING COMPACTION;
Alteration : MOD
GNDMASS OF BASALT FRAGMENTS RELATIVELY FRESH TO
STRONGLY ALTERED, LOCALLY OXIDIZED TO YELLOW-BROWN
ALONG MARGINS OF SMALLER FRAGMMENTS (PCES 1B,3B)
AND ALONG QUENCHED MARGINS RICH IN PYX PHENOS;
Phenocrysts: PLAGIOCLASE ( 5%)
PYROXENE ( 5%)
USUALLY IN SUBOPHITIC CLOTS;
OLIVINE
RARE, REPLACED BY BROWN SMEC OR IDDINGS;
Replacement: SMECTITE
Minerals Replaced: OL
IDDINGSITE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/ 370 Analyst: Bryan, W.
Hole: 417D Sample Midpoint (m) : 633.37
Core: 59 Top of Core Depth (m) : 624.00
Sect: 7 Top of Section Depth(m): 633.00
LITHOLOGY: BASALTIC BRECCIA;
PLAG-PYX MODERATELY PHYRIC BASALT FRAGMENTS;
Piece No. : PCE 1 (3-10), 2 (13-21), 3 (23-37);
Texture : BRECCIA COMPOSED OF PLAG-PYX MODERATELY PHYRIC
BASALT FRAGMENTS IN A MATRIX OF GREEN SMEC, GNDMASS
APHANITIC TO FINE-GRAINED;
Structure : PCES 1 AND 2 CONTAIN VERTICAL SLICKENSIDES IN SMEC;
Alteration : SLIGHTLY
GNDMASS LOCALLY OXIDIZED TO PINKISH GREY;
Phenocrysts: COMBINATION ( 10%)
PLAG+PYX, RELATIVE ABUNDANCE VARIABLE IN SMALL
APHANITIC FRAGMENTS;
Replacement: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 0/1300 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 634.30
Core: 60 Top of Core Depth (m) : 633.00
Sect: 1 Top of Section Depth(m): 633.00
LITHOLOGY: BASALTIC BRECCIA;
PLAG-CPX-OL PHYRIC PILLOW BASALT FRAGMENTS;
Piece No. : PCE 1 (2-9), 2A (12-28), 2B (27-37), 3A (41-49),
3B (49-57), 3C (61-69), 4 (72-78), 5 (82-98),
6 (101-120), 7 (123-130);
Texture : BRECCIA COMPOSED OF FRAGMENTS OF PLAG-CPX-OL PHYRIC
BASALT IN A MATRIX OF DARK GREEN SMEC + CARB,
GNDMASS FINE TO MEDIUM-GRAINED;
Alteration : MOD
ALTERATION CONFINED TO SMALL FINE-GRAINED CLASTS;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <3
EUHEDRAL, IN GLOMEROCRYSTS WITH PYX;
CLINOPYROXENE ( 5%)
Size(mm): <3
AUGITE;
OLIVINE ( 5%)
Size(mm): <1.5
REPLACED BY SMEC, EUHEDRAL, IN GLOMEROCRYSTS WITH
PYX;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
ABUNDANT IN MATRIX AT (5,28,48,100,120CM);
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 635.99
Core: 60 Top of Core Depth (m) : 633.00
Sect: 2 Top of Section Depth(m): 634.50
LITHOLOGY: BASALTIC BRECCIA;
PLAG-CPX-OL PHYRIC BASALT FRAGMENTS;
Piece No. : PCE 1A (2-34), 1B (35-50), 1C (50-57), 2A (60-72),
2B (72-80), 3A (82-90), 3B (90-98), 4 (100-112),
5 (114-124), 6A (125-135), 6B (135-149);
Texture : BRECCIA COMPOSED OF PLAG-CPX-OL PHYRIC BASALT
FRAGMENTS IN A MATRIX OF CLAY;
Structure : THIN VEINS CUTTING BRECCIA MATRIX AND OUTLINING
BASALT FRAGMENTS (PCES 5-6A) FILLED WITH CARB;
Alteration : MOD
SMALLEST CLASTS MOST ALTERED;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <4
CLINOPYROXENE ( 4%)
Size(mm): <2
AUGITE, OCCUR AS ISOLATED SUBHEDRAL XTLS AND IN
GLOMEROCRYSTS WITH PLAG;
OLIVINE
REPLACED BY SMEC + CARB;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 637.42
Core: 60 Top of Core Depth (m) : 633.00
Sect: 3 Top of Section Depth(m): 636.00
LITHOLOGY: BASALTIC BRECCIA;
PLAG-PYX PHYRIC BASALT FRAGMENTS;
Piece No. : PCE 1 (2-11), 2 (14-27), 3A (31-36), 3B (37-49),
3C (50-59), 3C1 (55-62), 4 (65-79), 5 (81-95),
6 (99-121), 7A (124-134), 7B (134-141);
Texture : BRECCIA COMPOSED OF APHYRIC TO PLAG-PYX PHYRIC
BASALT FRAGMENTS AND BASALTIC GLASS RANGING IN SIZE
FROM 1-20MM IN A MATRIX OF DARK GREEN SMEC MIXED
WITH SMALL AMOUNTS (<10%) OF CARB IN PCES 3-7,
GNDMASS APHANITIC TO MICROLITIC;
Structure : VEINS FILLED WITH CARB, PCES 3 AND 6 DISPLAY
SLICKENSIDES CONSISTING OF A NORMAL FAULT IN A CARB
VEIN;
Alteration : MOD;
Vesicles : Size(mm): Percent: 2
Location: Filling: CARB,SMEC
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <4
PYROXENE ( 10%)
Size(mm): <3
Replacement: SMECTITE
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1290 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 638.79
Core: 60 Top of Core Depth (m) : 633.00
Sect: 4 Top of Section Depth(m): 637.50
LITHOLOGY: BASALTIC BRECCIA;
PLAG-CPX-OL MODERATELY PHYRIC BASALT FRAGMENTS
Piece No. : PCE 1 (4-25), 2 (29-38), 3A (42-68), 3B (69-80),
3B1 (72-95), 4 (100-111), 5 (115-129);
Texture : BRECCIA COMPOSED OF ANGULAR TO SUBROUNDED PLAG-CPX
MODERATELY PHYRIC BASALT FRAGMENTS RANGING IN
SIZE FROM 0.1-90MM IN A MATRIX OF SMEC AND MINOR
CARB AND FRESH GLASS TRACES, GNDMASS FINE TO MEDIUM
GRAINED, MATRIX COMPOSED OF SMEC AFTER FINE SHARDS
AND SPHERES OF GLASS OR SIDEROMELANE SAND;
Structure : BASALT FRAGMENTS COMMONLY OUTLINED BY CARB-FILLED
VEINS;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
COMBINATION ( 5-10%)
Size(mm): 1-3
PLAG+CPX+OL, GLOMEROCRYSTS, REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: PLAG,CPX,OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst:
Hole: 417D Sample Midpoint (m) : 640.43
Core: 60 Top of Core Depth (m) : 633.00
Sect: 5 Top of Section Depth(m): 639.00
LITHOLOGY: BASALTIC BRECCIA;
PLAG-CPX-OL MODERATELY PHYRIC BASALT FRAGMENTS;
Piece No. : PCE 1 (2-25), 2 (28-43), 3 (47-62), 4A (64-75),
4B (75-87), 5A (88-100), 5B (101-112), 6A (114-123),
6B (123-130), 7 (133-143);
Texture : BRECCIA COMPOSED OF ANGULAR TO SUBROUNDED FRAGMENTS
OF PLAG-CPX-OL MODERATELY PHYRIC BASALT RANGING IN
SIZE FROM 0.1 TO 90MM IN A MATRIX OF SMEC CONTAINING
TRACES OF FRESH GLASS, BRECCIA MATRIX CONTAINS
PYRITE AND CAVITIES LINED OR FILLED WITH SMEC (PCES
5-7) AND NUMEROUS SMALL BLACK SPHERES OF FRESH GLASS
TOWARD THE BASE OF THE SECTION, GNDMASS FINE-GRAINED
AND INTERSERTAL;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
Size(mm): <3
CLINOPYROXENE
Size(mm): <1.5
OLIVINE
Size(mm): <2
ALTERED, TOTAL PLAG+CPX+OL PHENOS 5-10%;
Replacement: SMECTITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1040 Analyst:
Hole: 417D Sample Midpoint (m) : 641.54
Core: 60 Top of Core Depth (m) : 633.00
Sect: 6 Top of Section Depth(m): 640.50
LITHOLOGY: BASALTIC BRECCIA;
PLAG-CPX-OL MODERATELY TO PHYRIC BASALT FRAGMENTS;
Piece No. : PCE 1 (2-14), 2A (16-25), 2B (27-34), 3 (37-38),
4 (42-51), 5A (54-60), 5B (62-73), 6A (74-87),
6B (88-95), 6C (95-104);
Texture : BRECCIA COMPOSED OF FINE-GRAINED PLAG-CPX-OL
MODERATELY TO PHYRIC FRAGMENTS AND FRESH BASALTIC
GLASS IN A MATRIX OF SMEC, SMEC AFTER SIDEROMELANE
SAND;
Structure : CARB-FILLED VEINS SUBVERTICAL THROUGH LARGER BASALT
CLASTS BUT DIFFUSE THROUGH THE MATRIX, VEINS
INCREASINGLY COMMON THROUGH BASE OF SECTION;
Alteration : MODERATELY;
Phenocrysts: COMBINATION ( 5-15%)
Size(mm): <5
PLAG+CPX+OL, PLAG+CPX PREDOMINANTLY IN SUBOPHITIC
CLOTS;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/ 930 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 639.93
Core: 61 Top of Core Depth (m) : 639.00
Sect: 1 Top of Section Depth(m): 639.00
LITHOLOGY: BASALTIC BRECCIA;
PLAG-CPX-OL PHYRIC BASALT FRAGMENTS;
Piece No. : PCE 1 (2-11), 2 (13-24), 3 (27-32), 31 (32-33),
4A (35-44), 4B (45-50), 5 (52-61), 6 (66-70),
7 (73-81), 8A (83-87), 8B (89-93);
Texture : BRECCIA COMPOSED OF PLAG-CPX-OL PHYRIC BASALT
FRAGMENTS IN A MATRIX OF SMEC + CARB, GNDMASS
APHANITIC TO MEDIUM-GRAINED;
Structure : GLASSY CHILLED MARGINS (PCES 5,7), VEINS FILLED WITH
CARB;
Alteration : MOD;
Vesicles : Size(mm): 0.5-1 Percent: 1-2
Location: Filling: CARB
VUGS FILLED WITH CARB;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
COMMON THROUGHOUT SECTION;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 643.47
Core: 62 Top of Core Depth (m) : 642.00
Sect: 1 Top of Section Depth(m): 642.00
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-6), 2A (8-22), 2B (22-34), 2C (26-33),
3 (37-41), 4A (43-54), 4B (55-67), 4C (67-82),
4D (82-86), 4E (87-119), 4F (120-145),
4G (137-147);
Texture : PLAG-PYX-OL PHYRIC, GNDMASS MOTTLED APHANITIC TO
MICROLITIC, GLASSY CHILLED MARGINS IN PCES (1,2A,4E)
PCE 1 CONTAINS FRESH PERLITIC GREY GLASS AND FRESH
TO ALTERED DARK GLASS WITH PLAG PHENOS <4MM ACROSS
AND FRESH TO ALTERED GREEN GLASS WITH THE FRESH
CONTAINING NUMEROUS PYRITE XTLS <1MM ACROSS;
Structure : VEINS FILLED WITH CARB+CLAY+PYRITE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 1-2
FILLED WITH CARB OR DARK CLAY, VUGS FILLED WITH
CARB+CLAY+PYRITE;
Phenocrysts: PLAGIOCLASE ( 25%)
Size(mm): <10
EUHEDRAL;
PYROXENE ( 5%)
Size(mm): 2-3
OLIVINE ( 5-10%)
REPLACED BY CLAY OR CARB;
Replacement: CLAY MINERALS
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
PYRITE
<1MM ACROSS;
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 644.98
Core: 62 Top of Core Depth (m) : 642.00
Sect: 2 Top of Section Depth(m): 643.50
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-9), 2 (13-16), 3 (20-26), 4A (28-40),
4B (41-51), 5A (52-72), 5B (73-81), 6A (84-98),
6B (98-105), 7A (108-114), 7B (114-124),
7C (125-132), 7D (133-140), 8 (142-148);
Texture : PLAG-PYX-OL PHYRIC, GNDMASS MOTTLED, GLASSY CHILLED
MARGINS IN PCES (1-3,6A,7A,7C-D);
Structure : VEINS FILLED WITH CARB+CLAY+PYRITE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 1
Location: Filling: CARB,SMEC
Shape : ROUND
GREEN SMEC, VUGS FILLED WITH CARB+CLAY+PYRITE;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <10
EUHEDRAL;
PYROXENE ( 5%)
OLIVINE ( 5%)
ALTERED;
Replacement: SMECTITE
CARBONATE
CLAY MINERALS
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 646.47
Core: 62 Top of Core Depth (m) : 642.00
Sect: 3 Top of Section Depth(m): 645.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-10), 1B (10-13), 1C (14-30), 1D (30-41),
1E (42-64), 1F (64-73), 1G (74-84), 1H (84-91),
1I (91-99), 1J (100-103), 2 (105-106), 3A (109-120),
3B (121-134), 3C (134-147);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS MOTTLED WITH PATCHES OF
GLASS AND GLOMEROCRYSTS, GLASSY CHILLED MARGINS IN
PCES (1B-C,1H,1J,2), GLASS LOCALLY REPLACES BY SMEC;
Structure : VEINS IN PCES (1A,1F,3A,3C) FILLED WITH SMEC+CARB+
PYRITE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: CARB
FILLED WITH CARB AND LINED WITH SMEC;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <4
CLINOPYROXENE ( 2-4%)
AUGITE;
OLIVINE ( 2-4%)
Size(mm): <2
REPLACED BY SMEC, PLAG+OL COMMON IN GLOMERCRYSTS
<8MM ACROSS, AUGITE EXCLUSIVELY IN GLOMEROCRYSTS;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
CLAY MINERALS
PYRITE
DISPERSED GRAINS <5MM ACROSS;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 647.97
Core: 62 Top of Core Depth (m) : 642.00
Sect: 4 Top of Section Depth(m): 646.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-7), 2A (12-16), 2B (14-17), 3A (21-26),
3B (26-31), 4 (34-49), 5A (52-67), 5B (67-74),
5C (75-82), 6 (85-92), 7A (94-104), 7B (105-110),
7B1 (110-118), 7C (119-125), 7D (125-131),
8 (134-147);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS MOTTLED DUE TO PRESENCE
OF GLOMEROCRYSTS AND PATCHES AND VARIATIONS IN
EXTENT OF CRYSTALLIZATION, GLASSY CHILLED MARGINS IN
PCES 3B AND 4;
Structure : VEINS FILLED WITH SMEC+CARB+PYRITE;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
CLINOPYROXENE ( 3%)
AUGITE;
OLIVINE ( 3%)
Size(mm): <2
REPLACED BY SMEC, PLAG+CPX+OL GLOMEROCRYSTS <8MM
ACROSS, PLAG+OL OCCUR AS ISOLATED PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
CLAY MINERALS
PYRITE
DISSEMINATED GRAINS;
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 649.48
Core: 62 Top of Core Depth (m) : 642.00
Sect: 5 Top of Section Depth(m): 648.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-10), 1B (10-20), 1C (20-24), 2A (27-37),
2B (37-44), 2C (45-53), 2D (52-70), 2E (70-75),
2F (75-90), 2G (91-99), 2H (100-114), 2H1 (115-122),
2I (123-138), 3 (141-147);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS MOTTLED DUE TO PRESENCE
OF GLOMEROCRYSTS AND PATCHES OF GLASS AND VARIATIONS
IN EXTENT OF CRYSTALLIZATION, INCIPIENT
BRECCIATION FROM 45-55CM, GLASSY CHILLED MARGINS IN
PCES (2A,2E-F);
Structure : VEINS IN PCES 2H-2H1 ARE FILLED WITH SMEC+CARB+
PYRITE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 1
Location: Filling: CARB
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
CLINOPYROXENE ( 3%)
AUGITE;
OLIVINE ( 3%)
Size(mm): <4
REPLACED BY SMEC, PLAG+CPX+OL OCCUR IN
GLOMEROCRYSTS <12MM ACROSS, PLAG+OL AS ISOLATED
PHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
CLAY MINERALS
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 650.99
Core: 62 Top of Core Depth (m) : 642.00
Sect: 6 Top of Section Depth(m): 649.50
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-11), 11 (2-10), 2A (13-20), 2B (20-28),
3 (31-42), 4A (44-52), 4B (52-62), 4C (62-68),
4D (69-77), 4E (78-80), 4F (81-90), 4G (90-101),
4H (100-109), 5A (111-121), 5B (114-120),
6 (123-130), 7 (133-137), 8 (139-149);
Texture : PLAG-PYX-OL PHYRIC, GNDMASS MOTTLED, GLASSY CHILLED
MARGINS IN PCES 2 AND 4D-F;
Structure : COMPLETE PILLOWS IN THE FOLLOWING INTERVALS (0-20,
20-80,80-150CM), VEINS FILLED WITH CLAY+CARB+PYRITE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): 1 Percent: 3-5
Location: Filling: CARB,SMEC
GREEN SMEC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <8
COMMONLY IN GLOMEROCRYSTS WITH PYX OR AS ISOLATED
XTLS;
PYROXENE ( 8%)
Size(mm): <5
IN GLOMEROCRYSTS WITH PLAG OR AS ISOLATED XTLS;
OLIVINE ( 3%)
Size(mm): <4
ALTERED;
Replacement: CARBONATE
CLAY MINERALS
SMECTITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 880 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 651.88
Core: 62 Top of Core Depth (m) : 642.00
Sect: 7 Top of Section Depth(m): 651.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-13), 2 (16-26), 3 (29-36), 4A (39-58),
4B (59-66), 5 (70-77), 6 (80-88);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS MOTTLED DUE TO PRESENCE
OF SUBOPHITIC GLOMEROCRYSTS AND PATCHES OF GLASS AND
VARIATIONS IN EXTENT OF CRYSTALLIZATION, GLASSY
CHILLED MARGIN IN PCE 3;
Structure : LOCALLY COMPLEX VEINS WITH CARB+SMEC+PYRITE IN
PCES 1-2;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 2
Location: Filling: CARB OR SMEC
PCE 6;
Phenocrysts: PLAGIOCLASE ( 10%)
CLINOPYROXENE ( 3%)
AUGITE;
OLIVINE ( 3%)
REPLACED BY SMEC, AUGITE OCCURS AS ISOLATED PHENOS
WHILE PLAG+OL OCCUR AS ISOLATED PHENOS AND
GLOMEROCRYSTS;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
COMMON THROUGHOUT SECTION AS DISSEMINATED GRAINS
<8MM IN DIAMETER (PCE 2);
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 652.48
Core: 63 Top of Core Depth (m) : 651.00
Sect: 1 Top of Section Depth(m): 651.00
LITHOLOGY: PLAG-CPX-OL MODERATELY TO PHYRIC BASALT;
Piece No. : PCE 1 (3-25), 2A (28-34), 2A1 (32-72), 2B (72-82),
2C (82-92), 2D (92-116), 2E (116-148);
Texture : PLAG-CPX-OL MODERATELY TO PHYRIC INCREASING TOWARDS
PCE 2A1, GNDMASS INCREASES IN GRAIN SIZE FROM FINE
GRAINED IN PCES 2A1-2E TO MEDIUM OR COARSE-GRAINED
IN PCES 2A1-2E;
Structure : VEINS FILLED WITH NATROLITE OR BY CARB WITH LINING
OF DARK GREEN SMEC CONTAINING SMALL GRAINS <1MM OF
PYRITE OR BY CARB AND YELLOW MONT (PCE 2);
Alteration : SLIGHTLY;
Vesicles : Size(mm): <2 Percent: 3
Location: Filling: CARB,OPAL,ZEOLITE
PCES 1-2A;
Phenocrysts: PLAGIOCLASE ( 8-15%)
Size(mm): 4-7
CLINOPYROXENE ( 1-5%)
Size(mm): 1-4
AUGITE;
OLIVINE ( 1-5%)
Size(mm): 1-8
ALTERED, ALL PHENOS SUBHEDRAL TO EUHEDRAL AND
INCREASE IN SIZE AND ABUNDANCE IN PCES 2A1-2E;
Replacement: SMECTITE
OPAL
ZEOLITE
CARBONATE
PYRITE
GRAINS <1MM;
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Bryan, W.
Hole: 417D Sample Midpoint (m) : 653.96
Core: 63 Top of Core Depth (m) : 651.00
Sect: 2 Top of Section Depth(m): 652.50
LITHOLOGY: PLAG-PYX PHYRIC BASALT;
Piece No. : PCE 1A (2-16), 1B (16-29), 1C (29-37), 1D (37-49),
1E (50-61), 1E1 (58-70), 1F (70-89), 1G (90-98),
2A (102-111), 2B (112-133), 3 (136-146);
Texture : PLAG-PYX-PHYRIC, CHILLED MARGINS IN PCES 1G AND 2A,
PCE 1 REPRESENTS BASE OF COOLING UNIT DESCRIBED IN
PREVIOUS SECTION;
Structure : VEINS FILLED WITH CARB (PCE 1) OR BY CARB+MINOR
PYRITE (PCES 2-3);
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 10
Location: Filling: CARB
PCES 2-3;
Phenocrysts: PLAGIOCLASE
PYROXENE
ALL PHENOS COMMON IN PCE 1, DECREASE IN ABUNDANCE
IN PCES 2-3, PYX CONCENTRATION IN PCE 1 MAY BE DUE
TO XTL SETTLING;
Groundmass : GROUNDMASS ALTERED ALONG VEINS;
Replacement: CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 655.46
Core: 63 Top of Core Depth (m) : 651.00
Sect: 3 Top of Section Depth(m): 654.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (3-21), 1B (22-42), 1C (42-53), 1D (54-67),
1E (68-80), 1F (81-100), 1G (101-117), 1H (118-135),
1I (136-146);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS INCREASINGLY COARSE
GRAINED TOWARD CENTER OF SECTION, MOTTLED DUE TO
PRESENCE OF GLOMEROCRYSTS AND VARIATIONS IN EXTENT
OF CRYSTALLIZATION, ALSO PATCHES OF GLASS;
Structure : FRACTURES, VEINS OFTEN LARGE (<2CM ACROSS) AND
COMPLEX WITH FILLINGS OF SMEC+CARB+PYRITE, THICK
VEINS AT 53CM AND 70-90CM CONTAIN ABUNDANT PYRITE
AND QUARTZ RESPECTIVELY;
Alteration : MODERATELY;
Vesicles : Size(mm): Percent: 3
IN PCE 1;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
CLINOPYROXENE ( 3%)
AUGITE;
OLIVINE ( 3%)
Size(mm): <4
REPLACED BY SMEC;
PLAG+CPX+OL COMMONLY GLOMEROCRYSTS <10MM AND LESS
FREQUENTLY AS ISOLATED XTLS;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 656.97
Core: 63 Top of Core Depth (m) : 651.00
Sect: 4 Top of Section Depth(m): 655.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1 (2-8), 2 (12-30), 3 (33-38), 4 (40-47),
5 (50-66), 6A (68-80), 6B (80-93), 6C (93-109),
7A (111-117), 7B (118-126), 8A (129-136),
8B (135-147);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS APHANITIC TO FINE
GRAINED, GLASSY CHILLED MARGINS IN PCES 8A-B;
Structure : VEINS <2CM WIDE FILLED WITH CARB AND LINED WITH
SMEC, VEINS ALSO HAVE INCLUSIONS OF PYRITE AND
CHALCOPYRITE (PCE 5);
Alteration : MOD;
Vesicles : Size(mm): <2 Percent: 1-2
Location: Filling: CARB,OPAL,ZEOLITE
OCCASIONALLY LINED WITH PYRITE;
Phenocrysts: PLAGIOCLASE ( 15%)
CLINOPYROXENE ( 3%)
AUGITE, EXCLUSIVELY IN GLOMEROCRYSTS WITH PLAG;
OLIVINE ( 4%)
PLAG+OL OCCUR BOTH IN GLOMEROCRYSTS AND AS
ISOLATED EUHEDRAL PHENOS;
Replacement: SMECTITE
CARBONATE
PYRITE
OPAL
ZEOLITE
CHALCOPYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Bryan, W.
Hole: 417D Sample Midpoint (m) : 658.48
Core: 63 Top of Core Depth (m) : 651.00
Sect: 5 Top of Section Depth(m): 657.00
LITHOLOGY: PLAG-PYX-PHYRIC BASALT;
Piece No. : PCE 1A (2-11), 1B (11-27), 1C (27-39), 1D (40-47),
1E (47-59), 1F (60-74), 1G (74-93), 2 (95-103),
3 (105-125), 4 (127-136), 5 (139-148);
Texture : PLAG-PYX-PHYRIC;
Structure : THIN VEINS FILLED WITH CARB + PYRITE;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE
PYROXENE
TENDING TO BE CONCENTRATED IN PCES 3-4;
Replacement: CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 830 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 659.33
Core: 63 Top of Core Depth (m) : 651.00
Sect: 6 Top of Section Depth(m): 658.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-20), 1B (20-30), 1C (30-37), 2A (41-44),
2B (45-49), 2C (51-57), 3 (62-70), 4 (73-83);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS MOTTLED DUE TO PRESENCE
OF SUBOPHITIC CLOTS, THICK GLASSY CHILLED MARGINS
IN PCES (2A,2C-4), PILLOW MARGINS HIGHLY PHYRIC;
Structure : COMPLEX VEINS FILLED WITH SMEC + CARB AND MINOR
PYRITE;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <15
CLINOPYROXENE ( 3%)
Size(mm): <5
AUGITE;
OLIVINE ( 3%)
Size(mm): <5
ALTERED;
Replacement: SMECTITE
PILLOW MARGINS HALF REPLACED BY SMEC;
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 661.47
Core: 64 Top of Core Depth (m) : 660.00
Sect: 1 Top of Section Depth(m): 660.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-10), 1B (11-19), 1C (20-30), 2A (33-50),
2B (51-64), 2C (65-75), 2D (76-86), 2E (86-94),
2F (94-102), 2G (102-111), 2H (109-123),
2I (123-129),3 (133-147);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS MOTTLED DUE TO PRESENCE
OF SUBOPHITIC GLOMEROCRYSTS AND PATCHES OF GLASS AND
VARIATIONS IN EXTENT OF CRYSTALLIZATION,
PORPHYRITIC GLASSY MARGINS IN PCES 2G-H;
Structure : COMPLEX VEINS FILLED WITH SMEC+CARB+PYRITE;
Alteration : SLIGHTLY;
Vesicles :
Location: Filling: CARB
COMMON AT TOP AND BOTTOM OF SECTION;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <15
CLINOPYROXENE ( 3%)
Size(mm): <5
AUGITE;
OLIVINE ( 3%)
Size(mm): <5
ALTERED;
Replacement: SMECTITE
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 662.98
Core: 64 Top of Core Depth (m) : 660.00
Sect: 2 Top of Section Depth(m): 661.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-13), 1B (14-23), 1C (24-29), 1D (29-45),
1E (45-57), 2A (60-76), 2B (77-91), 3A (94-101),
3B (102-107), 3C (108-117), 3D (117-125),
4A (128-135), 4B (135-148);
Texture : PLAG-CPX-OL PHYRIC, 2CM THICK GLASSY CHILLED MARGIN
IN PCE 4A;
Structure : VEINS FILLED WITH PYRITE OR BY CARB WITH SMEC
MARGINS CONTAINING PYRITE GRAINS AND XTLS <3MM
ACROSS;
Alteration : MOD;
Vesicles : Size(mm): Percent: 1-3
<1% IN PCES 1-3 AND UP TO 3% IN PCE 4;
Phenocrysts: PLAGIOCLASE ( 15%)
CLINOPYROXENE ( 3%)
ANHEDRAL AUGITE, COMMONLY IN GLOMEROCRYSTS WITH
PLAG;
OLIVINE ( 2%)
ALTERED;
Replacement: SMECTITE
PYRITE
CARBONATE
MONTMORILLONITE
PCE 3A CONTAINS A LARGE FILLING OF MONT WITH
CARB INCLUSIONS;
Leg : 52 Top/Bottom Interval(mm): 0/1380 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 664.38
Core: 64 Top of Core Depth (m) : 660.00
Sect: 3 Top of Section Depth(m): 663.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-9), 1B (10-24), 1C (21-33), 2 (35-38),
3A (40-61), 3B (62-78), 3C (78-92), 3D (92-94),
3E (95-116), 3F (117-125), 3G (126-131),
3H (132-138);
Texture : PLAG-CPX-OL PHYRIC, MOTTLED DUE TO PRESENCE OF
GLOMEROCRYSTS <15MM ACROSS AND PATCHES OF GLASS AND
VARIATIONS IN EXTENT OF CRYSTALLIZATION,
PORPHYRITIC GLASSY CHILLED MARGINS IN PCES (2,3A,3D,
3E), PILLOW MARGINS HALF REPLACED BY SMEC;
Structure : NUMEROUS COMPLEX VEINS FILLED WITH CARB+SMEC+PYRITE
+QUARTZ, PCE 3F CONSISTS ENTIRELY OF A LARGE VEIN
FILLING;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <15
CLINOPYROXENE ( 3%)
AUGITE;
OLIVINE ( 3%)
REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
PYRITE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 665.97
Core: 64 Top of Core Depth (m) : 660.00
Sect: 4 Top of Section Depth(m): 664.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-16), 2 (20-34), 3 (38-48), 4A (52-59),
4B (60-68), 4C (69-71), 5 (74-79), 6 (83-90),
7 (94-100), 8 (104-110), 9 (113-116), 10 (119-123),
11 (127-131), 12 (134-147);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS APHANITIC TO FINE
GRAINED;
Structure : CHILLED GLASSY MARGINS IN PCES 4B-5 AND 11, FROM 74-
124CM APHYRIC PILLOW WITH A PORPHYRITIC UPPER
MARGIN, VEINS FILLED WITH PYRITE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CARB,SMEC
LINED WITH PYRITE;
Size(mm): Percent: 3-5
Location: Filling: SMEC
PCES 5-9;
Phenocrysts: PLAGIOCLASE ( 10%)
CLINOPYROXENE ( 2-3%)
Size(mm): 2-3
COMMONLY WITH PLAG IN SUBOPHITIC CLOTS <7MM
ACROSS;
OLIVINE ( 2%)
Size(mm): 2-3
REPLACED BY SMEC + PYRITE;
Replacement: SMECTITE
Minerals Replaced: OL
PYRITE
Minerals Replaced: OL
AS DISSEMINATED GRAINS IN THE GNDMASS;
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 667.48
Core: 64 Top of Core Depth (m) : 660.00
Sect: 5 Top of Section Depth(m): 666.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (4-17), 1B (18-30), 2 (33-51), 3A (54-63),
3B (64-77), 3C (77-90), 3D (91-110), 4 (113-121),
5A (123-139), 5B (138-148);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED;
Structure : NUMEROUS VEINS FILLED WITH CARB+SMEC+MONT+PYRITE;
Alteration : MOD;
Vesicles : Size(mm): Percent: 1-1.5
Location: Filling: CARB,OPAL,ZEOLITE
ALSO SMEC FILLED;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <6
CLINOPYROXENE ( 3%)
Size(mm): <3
ANHEDRAL AUGITE, IN GLOMEROCRYSTS WITH PLAG;
OLIVINE ( 1-3%)
Size(mm): <3
EUHEDRAL, REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
OPAL
ZEOLITE
MONTMORILLONITE
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 900 Analyst: Bryan, W.
Hole: 417D Sample Midpoint (m) : 668.40
Core: 64 Top of Core Depth (m) : 660.00
Sect: 6 Top of Section Depth(m): 667.50
LITHOLOGY: PLAG-PYX PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (3-25), 2A (28-41), 2B (41-50), 2C (50-57),
2D (58-77), 2E (77-90);
Texture : PLAG-PYX PHYRIC;
Structure : VEINS FILLED WITH CARB+SMEC+MINOR PYRITE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 2-3
DECREASE IN ABUNDANCE WITH DEPTH;
Phenocrysts: COMBINATION ( 15%)
PLAG+PYX, PLAG PREDOMINATING;
Replacement: SMECTITE
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst:
Hole: 417D Sample Midpoint (m) : 670.47
Core: 65 Top of Core Depth (m) : 669.00
Sect: 1 Top of Section Depth(m): 669.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-6), 1B (6-27), 1C (28-39), 1C1 (35-42),
1D (42-57), 1E (59-76), 1F (77-96), 1G (97-116),
2A (122-132), 2B (134-147);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS INTERSERTAL FINE-GRAINED
CONTAINING GLOMEROCRYSTS OF PLAG+CPX;
Structure : NUMEROUS VEINS FILLED BY CARB + SMEC + PYRITE;
Alteration : MOD;
Vesicles : Size(mm): <1 Percent:
Location: Filling: CARB,SMEC
Phenocrysts: COMBINATION ( 10%)
Size(mm): 2-5
PLAGIOCLASE,CLINOPYROXENE
OLIVINE ( 5%)
ALTERED;
Replacement: SMECTITE
CARBONATE
PYRITE
ALSO AS DISSEMINATED GRAINS;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst:
Hole: 417D Sample Midpoint (m) : 671.97
Core: 65 Top of Core Depth (m) : 669.00
Sect: 2 Top of Section Depth(m): 670.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-17), 2A (20-25), 2B (26-31), 2C (32-41),
3 (45-62), 4A (65-80), 4B (81-97), 4C (97-103),
4D (105-114), 4D1 (114-125), 5 (128-133),
6 (135-138), 7 (141-147);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED AND
INTERSERTAL;
Structure : NUMEROUS VEINS FILLED WITH CARB+SMEC+PYRITE;
Alteration : MOD;
Vesicles : Size(mm): 1-2 Percent: 1-2
PRESENT THROUGHOUT SECTION AND INCREASING IN PCES
4A-C;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
CLINOPYROXENE ( 5%)
Size(mm): <2
IN GLOMEROCRYSTS WITH PLAG;
OLIVINE ( <5%)
REPLACED BY SMEC + CARB;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1450 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 673.45
Core: 65 Top of Core Depth (m) : 669.00
Sect: 3 Top of Section Depth(m): 672.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-17), 2 (20-29), 3 (32-41), 4 (45-54),
5 (57-62), 6A (66-75), 6B (76-87), 6B1 (88-94),
7 (98-111), 8A (114-131), 8B (132-145);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED, PCE 6
DISPLAYS INCIPIENT BRECCIATION, MOTTLED DUE TO
UNEVEN DISTRIBUTION OF GLOMEROCRYSTS AND PHENOS AND
TO VARIATIONS IN GNDMASS TEXTURE;
Structure : VEINS FILLED WITH SMEC OR LESS COMMONLY SMEC+CARB
AND PYRITE;
Alteration : MOD
GNDMASS ALTERED ALONG VEINS;
Vesicles : RARE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
OCCASIONALLY CONTAIN SMALL INCLUSIONS OF FRESH
GLASS (0.1MM);
CLINOPYROXENE ( 3%)
AUGITE, COMMONLY IN GLOMEROCRYSTS <5MM;
OLIVINE ( 3%)
Size(mm): <4
REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst:
Hole: 417D Sample Midpoint (m) : 674.97
Core: 65 Top of Core Depth (m) : 669.00
Sect: 4 Top of Section Depth(m): 673.50
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-8), 1B (10-20), 2A (23-32), 2B (33-48),
3 (51-61), 4A (64-72), 4B (72-80), 5A (82-98),
5B (97-104), 6 (106-109), 7 (111-117), 71 (118-127),
8 (130-139), 9 (142-147);
Texture : PLAG-PYX-OL PHYRIC, GNDMASS RANGES FROM FINE-GRAINED
INTERSERTAL IN PCES 1-3 AND 58-9 TO VERY FINE
GRAINED IN PCES 4A-5A NEAR PILLOW MARGIN;
Structure : APHYRIC CHILLED MARGIN IN PCE 5A, VEINS FILLED WITH
SMEC+CARB+PYRITE;
Alteration : MOD;
Phenocrysts: COMBINATION (20-25%)
PLAGIOCLASE
Size(mm): <5
PYROXENE
Size(mm): <2
COMMONLY IN GLOMEROCRYSTS WITH PLAG;
OLIVINE
Size(mm): <4
LOCALLY (PCE 2B) >5%, ALTERED;
Replacement: SMECTITE
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 676.46
Core: 65 Top of Core Depth (m) : 669.00
Sect: 5 Top of Section Depth(m): 675.00
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (3-11), 2A (14-21), 2B (21-32), 3 (35-38),
4 (41-46), 41 (47-50), 5 (53-55), 6 (57-62),
7 (65-69), 71 (70-72), 8 (75-82), 9 (85-94),
10 (97-102), 101 (102-105), 11 (109-116),
12A (119-125), 12B (126-128), 13 (132-146);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS MEDIUM-GRAINED;
Structure : VEINS FILLED WITH DARK GREEN SMEC AND PYRITE AND
MINOR QUARTZ;
Alteration : SLIGHTLY;
Vesicles :
Location: Filling: SMEC
RARE;
Phenocrysts: COMBINATION (10-15%)
Size(mm): <10
PLAG +(PLAG+CPX), MEAN OF 2-3MM;
OLIVINE ( 2-3%)
Size(mm): 1-2
REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
PYRITE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/ 920 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 677.42
Core: 65 Top of Core Depth (m) : 669.00
Sect: 6 Top of Section Depth(m): 676.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (3-13), 2 (16-24), 3 (27-41), 4 (45-63),
5 (66-92);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS COARSE-GRAINED;
Structure : VEINS FILLED WITH SMEC+MONT+CARB+PYRITE;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <7
CLINOPYROXENE ( 3%)
AUGITE, IN GLOMEROCRYSTS WITH PLAG;
OLIVINE ( 5%)
Size(mm): <5
REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
MONTMORILLONITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst:
Hole: 417D Sample Midpoint (m) : 679.42
Core: 66 Top of Core Depth (m) : 678.00
Sect: 1 Top of Section Depth(m): 678.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-7), 2A (11-35), 2B (31-46), 2C (46-55),
2D (52-67), 3 (70-74), 4 (77-83), 5 (86-92),
6 (93-104), 7A (106-112), 7B (112-118), 8 (122-129),
9 (132-142);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED
INTERSERTAL;
Structure : NUMEROUS VEINS FILLED WITH SMEC+CARB AND MINOR
PYRITE;
Alteration : MOD;
Vesicles : Size(mm): 0.5-2 Percent: 1-2
INCREASE IN ABUNDANCE FROM PCES 1-7 TO PCES 8-9;
Phenocrysts: PLAGIOCLASE
Size(mm): <5
CLINOPYROXENE
Size(mm): <1.5
IN GLOMEROCRYSTS WITH PLAG;
OLIVINE
Size(mm): <5
REPLACED BY SMEC + CARB, TOTAL PHENOS 10-15% IN
PCES 1-6% AND INCREASE TO 15-20% IN PCES 7-9;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst:
Hole: 417D Sample Midpoint (m) : 680.96
Core: 66 Top of Core Depth (m) : 678.00
Sect: 2 Top of Section Depth(m): 679.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-16), 2 (19-21), 3 (24-28), 4 (30-34),
5A (37-54), 5B (47-54), 6 (56-60), 7 (62-74),
8A (77-101), 8B (102-140);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS RANGES FROM FINE-GRAINED
INTERSERTAL IN PCES 1 AND 5-8 TO VERY FINE-GRAINED
OR APHANITIC IN PCES 2-4;
Structure : CHILLED MARGINS IN PCES 3-4, NUMEROUS VEINS FILLED
WITH CARB+SMEC;
Alteration : MOD;
Vesicles :
Location: Filling: CARB,SMEC
RARE IN PCES 1-6, INCREASE TO 1-2% IN PCES 7-8;
Phenocrysts: PLAGIOCLASE
Size(mm): <5
OCCUR AS ISOLATED PHENOS AND IN GLOMEROCRYSTS WITH
CPX;
CLINOPYROXENE
OLIVINE
Size(mm): <5
REPLACED BY SMEC+CARB, TOTAL PHENOS 15-20%;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
PYRITE
COMMON AS GRAINS IN SMEC;
Leg : 52 Top/Bottom Interval(mm): 0/1110 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 682.11
Core: 66 Top of Core Depth (m) : 678.00
Sect: 3 Top of Section Depth(m): 681.00
LITHOLOGY: PLAG-CPX-OL MODERATELY TO PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (4-34), 1B (35-45), 2 (49-53), 3A (56-62),
3B (62-81), 3C (82-102), 3D (102-111);
Texture : PLAG-CPX-OL MODERATELY TO PHYRIC, GNDMASS FINE TO
MEDIUM-GRAINED INCREASING GRAIN SIZE WITH DEPTH,
GLASSY CHILLED MARGINS IN PCES (1B,2,3A);
Structure : VEINS FILLED WITH CARB+QUARTZ OR BY SMEC+PYRITE, PCE
3D CONTAINS SLICKENSIDES IN SMEC WITH A PLUNGE OF
25 DEGREES - 30 DEGREES;
Alteration : MOD
GLASS IS FRESH;
Vesicles : Size(mm): 0.5-1 Percent: 1-2
Location: Filling: CARB
PCE 3, ABSENT IN PCES 1-2;
Phenocrysts: PLAGIOCLASE
AS ISOLATED XTLS OR IN GLOMEROCRYSTS WITH CPX
<8MM;
CLINOPYROXENE
OLIVINE ( 2-3%)
Size(mm): 1
OCCASIONALLY IN GLOMEROCRYSTS 2-3MM ACROSS;
Replacement: SMECTITE
CARBONATE
QUARTZ
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst:
Hole: 417D Sample Midpoint (m) : 683.98
Core: 66 Top of Core Depth (m) : 678.00
Sect: 4 Top of Section Depth(m): 682.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-20), 1A1 (20-42), 1A11 (37-49),
PCE 1B (51-70), 1C (70-78), 2A (81-94), 2B (95-113),
2C (113-122), 3 (124-127), 4A (129-136),
4A1 (137-148);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS FINE-GRAINED AND
INTERSERTAL, CHILLED MARGIN IN PCE 4A;
Structure : NUMEROUS VEINS FILLED WITH SMEC+CARB+PYRITE OR
MORE RARELY SMEC WITH A CORE OF CARB;
Alteration : MOD;
Vesicles :
Location: Filling: SMEC,CARB
RARE;
Phenocrysts: PLAGIOCLASE
Size(mm): <5
AS ISOLATED XTLS OR IN GLOMEROCRYSTS WITH CPX;
CLINOPYROXENE
Size(mm): <1.5
OLIVINE
Size(mm): <5
REPLACED BY SMEC + CARB, TOTAL PHENOS <25%;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
PYRITE
OCCUR THROUGHOUT SECTION AS DISSEMINATED GRAINS;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 685.47
Core: 66 Top of Core Depth (m) : 678.00
Sect: 5 Top of Section Depth(m): 684.00
LITHOLOGY: PLAG-CPX-OL MODERATELY TO PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-21), 1B (22-31), 1C (32-36), 2 (40-48),
3A (52-57), 3B (58-62), 3C (62-74), 4A (77-84),
4B (85-94), 4C (95-99), 4C1 (100-109),
4D (110-129), 4E (130-147);
Texture : PLAG-CPX-OL MODERATELY TO PHYRIC, GNDMASS FINE-
GRAINED, BRECCIA IN PCES (2,3,4B) COMPOSED OF BASALT
FRAGMENTS IN A NETWORK OF SMEC VEINS;
Structure : GLASSY CHILLED MARGINS IN PCES 1C-4C, VEINS FILLED
WITH SMEC+CARB+QUARTZ AND IRREGULAR PATCHES OF
PYRITE;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
ALL PHENOS COMMONLY IN GLOMEROCRYSTS <10MM;
Replacement: SMECTITE
CARBONATE
PYRITE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/ 760 Analyst:
Hole: 417D Sample Midpoint (m) : 686.26
Core: 66 Top of Core Depth (m) : 678.00
Sect: 6 Top of Section Depth(m): 685.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-10), 2 (14-23), 3A (26-33), 3B (35-44),
4 (47-55), 5 (57-76);
Texture : PLAG-CPX-OL PHYRIC, BRECCIA IN PCES 1-3 COMPOSED OF
FRAGMENTED GLASSY PILLOW MARGINS IN A MATRIX OF CLAY
AND CARB CONTAINING FRAGMENTS OF FRESH GLASS,
GNDMASS APHANITIC TO FINE-GRAINED AND INTERSERTAL,
CHILLED GLASSY MARGIN IN PCE 4;
Structure : NUMEROUS VEINS FILLED WITH SMEC+CARB;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
Size(mm): <5
CLINOPYROXENE
Size(mm): <2
OLIVINE
Size(mm): <3
REPLACED BY SMEC+CARB, TOTAL PHENOS <20%;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1170 Analyst:
Hole: 417D Sample Midpoint (m) : 688.17
Core: 67 Top of Core Depth (m) : 687.00
Sect: 1 Top of Section Depth(m): 687.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-11), 1B (9-25), 1C (26-35), 1D (35-50),
1E (50-68), 1F (69-93), 1G (94-102), 1G1 (101-117);
Texture : PLAG-CPX-OL PHYRIC, FINE-GRAINED INTERSERTAL
GNDMASS;
Structure : VEINS FILLED WITH SMEC AND MINOR PYRITE+CARB;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( 13%)
Size(mm): <5
AS ISOLATED XTLS AND IN GLOMEROCRYSTS WITH CPX;
CLINOPYROXENE
Size(mm): <4
OLIVINE
Size(mm): <5
REPLACED BY SMEC+CARB;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1320 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 689.82
Core: 67 Top of Core Depth (m) : 687.00
Sect: 2 Top of Section Depth(m): 688.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (3-35), 1B (35-59), 1C (60-77), 1D (78-90),
1E (91-106), 1E1 (106-132);
Texture : PLAG-CPX-OL PHYRIC, GNDMASS MEDIUM-GRAINED, SECTION
CONTINUOUS WITH SECTIONS 1 AND 3;
Structure : VEINS FILLED WITH CARB+SMEC+QUARTZ+PYRITE IN
DECREASING ORDER OF ABUNDANCE;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <8
AS ISOLATED XTLS AND IN GLOMEROCRYSTS WITH CPX;
CLINOPYROXENE ( 3%)
Size(mm): 0.5-2
OLIVINE ( 2-3%)
Size(mm): 1-2
PARTICULARLY ABUNDANT IN PCES 1A-B AND 1D,
REPLACED BY SMEC;
Replacement: CARBONATE
SMECTITE
Minerals Replaced: OL
PYRITE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst:
Hole: 417D Sample Midpoint (m) : 691.47
Core: 67 Top of Core Depth (m) : 687.00
Sect: 3 Top of Section Depth(m): 690.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-21), 1B (21-53), 1C (51-64), 1D (65-84),
1E (85-104), 1F (105-130), 1G (131-147);
Texture : PLAG-CPX-OL PHYRIC BASALT, FINE-GRAINED INTERSERTAL
TO HOLOCRYSTALLINE GNDMASS, SECTION CONTINUOUS WITH
BASE OF SECTION 2;
Structure : VEINS FILLED WITH SMEC+CARB+PYRITE;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
Size(mm): <7
AS ISOLATED XTLS AND IN GLOMEROCRYSTS WITH PLAG;
CLINOPYROXENE
OLIVINE
Size(mm): <5
EUHEDRAL, REPLACED BY SMEC+CARB, ABUNDANT IN PCES
1A-B AND 1E, TOTAL PHENOS 15%;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1370 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 692.87
Core: 67 Top of Core Depth (m) : 687.00
Sect: 4 Top of Section Depth(m): 691.50
LITHOLOGY: PLAG-OL-PYX BASALT;
MASSIVE;
Piece No. : PCE 1A (2-24), 1A1 (19-42), 1B (43-52), 1B1 (53-60),
1C (61-86), 1C1 (86-87), 1D (88-112), 1E (113-137);
Texture : PLAG-OL-PYX PHYRIC, SECTION CONTINUOUS WITH BASE OF
SECTION 3;
Structure : VEINS FILLED WITH SMEC+CARB AND MINOR QUARTZ+ZEOLITE
UNEVENLY DISTRIBUTED;
Alteration : SLIGHTLY;
Vesicles : Size(mm): <20 Percent: 5-10
VUGS ALSO, LININGS OF GREEN SMEC AND CORES OF CARB
AND QUARTZ+PYRITE AND FIBROUS YELLOW ZEOLITES;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <15
MEAN OF 5MM;
OLIVINE ( 5-10%)
Size(mm): 2-5
ALTERED;
PYROXENE ( <5%)
Replacement: SMECTITE
CARBONATE
ZEOLITE
QUARTZ
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 694.43
Core: 67 Top of Core Depth (m) : 687.00
Sect: 5 Top of Section Depth(m): 693.00
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-21), 1B (21-30), 1C (30-42), 1D (43-50),
2A (53-56), 2B (59-64), 3A (67-72), 3B (72-81),
3C (82-92), 3D (93-96), 3D1 (95-112), 3E (113-122),
4 (132-143), 4I (133-143);
Texture : PLAG-PYX-OL PHYRIC, GNDMASS FINE-GRAINED IN PCES 2-3
AND MEDIUM-GRAINED IN PCES 1 AND 4, CONTINUOUS WITH
SECTION 4;
Structure : VEINS FILLED WITH CARB+CLAY+PYRITE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 1
Location: Filling: CLAY
Phenocrysts: PLAGIOCLASE ( <15%)
Size(mm): <10
PYROXENE ( <5%)
Size(mm): <5
OLIVINE ( 1-7%)
Size(mm): 2-8
ALTERED;
Replacement: CARBONATE
CLAY
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 350 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 694.85
Core: 67 Top of Core Depth (m) : 687.00
Sect: 6 Top of Section Depth(m): 694.50
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-20), 1B (20-30), 1B1 (30-35);
Texture : PLAG-PYX-OL PHYRIC, CHILLED MARGIN IN PCES 1B-B1;
Structure : VEINS FILLED WITH CARB+ZEOLITE+PYRITE;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <10
PYROXENE ( <5%)
OLIVINE ( 5%)
Size(mm): 5
ALTERED;
Replacement: CARBONATE
ZEOLITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 350/1140 Analyst: Ricou, L.
Hole: 417D Sample Midpoint (m) : 695.64
Core: 67 Top of Core Depth (m) : 687.00
Sect: 6 Top of Section Depth(m): 694.85
LITHOLOGY: PLAG-PYX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 2A (37-71), 2A1 (69-81), 2B (80-95), 3 (97-114);
Texture : PLAG-PYX MODERATELY PHYRIC;
Structure : VEINS FILLED WITH CARB+CLAY AND MINOR PYRITE;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 2-5
Location: Filling: CARB,CLAY,PYRITE
PCE 2A;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <7
ZONED;
PYROXENE
RARE;
Replacement: CARBONATE
CLAY
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1150 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 697.15
Core: 67 Top of Core Depth (m) : 687.00
Sect: 7 Top of Section Depth(m): 696.00
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-14), 1B (15-22), 1B1 (22-44),
1B1 (44-55), 1C (55-75), 1D (76-86), 2 (90-107),
3 (112-115);
Texture : PLAG-CPX PHYRIC, GNDMASS MEDIUM-GRAINED WITH
GRANULAR TEXTURE;
Structure : VEINS FILLED WITH CARB+SMEC AND MINOR QUARTZ+PYRITE;
Alteration : MOD;
Vesicles : Size(mm): 0.5-1 Percent: <1
Location: Filling: CARB,SMEC,PYRITE
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <8
ALSO IN GLOMEROCRYSTS WITH CPX, MEAN OF 2-3MM;
Replacement: CARBONATE
SMECTITE
PYRITE
DISTRIBUTED IRREGULARLY THROUGHOUT GNDMASS IN
ASSOCIATION WITH SMEC;
Leg : 52 Top/Bottom Interval(mm): 0/1160 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 697.16
Core: 68 Top of Core Depth (m) : 696.00
Sect: 1 Top of Section Depth(m): 696.00
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (4-14), 1B (12-50), 1C (46-90), 2A (92-116);
Texture : PLAG MODERATELY PHYRIC, COARSE-GRAINED CRYSTALLINE
GNDMASS (<0.5MM);
Alteration : SLIGHTLY;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
AUGITE;
OLIVINE
ALTERED, RARE;
MAGNETITE
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <10
ZONED, COMMONLY WITH INCLUSIONS;
Leg : 52 Top/Bottom Interval(mm): 1170/1300 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 697.30
Core: 68 Top of Core Depth (m) : 696.00
Sect: 1 Top of Section Depth(m): 697.17
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 2B (117-130);
Texture : PLAG-CPX-OL PHYRIC, GLASSY MARGINS BETWEEN
117-123CM;
Structure : BASALT DIKE CONTACT AGAINST COUNTRY ROCK (BASALT IN
UPPER PART OF SECTION) WELL-PRESERVED AND STEEPLY
INCLINED;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
CLINOPYROXENE ( 5%)
AUGITE, OCCUR EXCLUSIVELY IN GLOMEROCRYSTS <10MM
WITH PLAG+OL;
OLIVINE ( 5%)
ALTERED, PLAG AND OL OCCUR ALSO AS ISOLATED XTLS;
Leg : 52 Top/Bottom Interval(mm): 0/ 550 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 698.05
Core: 68 Top of Core Depth (m) : 696.00
Sect: 2 Top of Section Depth(m): 697.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (4-22), 1B (18-40), 1C (41-48), 2A (52-70);
Texture : PLAG-CPX-OL PHYRIC, BRECCIA IN PCES 1B-C COMPOSED
OF FRAGMENTS OF COUNTRY ROCK BASALT AND ALTERED
GLASS FROM DIKE MARGINS AND PALAG CONTAINING TRACES
OF FRESH GLASS;
Structure : GLASSY BASALT DIKE WITH AN ALTERED GLASSY MARGIN AT
THE TOP OF PCE 2A, DIKE CONTACT AGAINST COUNTRY ROCK
WELL-PRESERVED AND DIPS AT AN ANGLE OF 75-80
DEGREES;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
STRONGLY ZONED;
OLIVINE ( <10%)
Size(mm): <4
ALTERED SKELETAL;
CLINOPYROXENE ( 5%)
Size(mm): <12
AUGITE, OCCUR AS ROUNDED ISOLATED XTLS AND IN
GLOMEROCRUSTS <12MM WITH PLAG+OL;
Replacement: PALAGONITE
Leg : 52 Top/Bottom Interval(mm): 550/1180 Analyst: Byerly, G.
Hole: 417D Sample Midpoint (m) : 698.68
Core: 68 Top of Core Depth (m) : 696.00
Sect: 2 Top of Section Depth(m): 698.05
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 2A (52-70), 2B (65-92), 2C (93-118);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS COARSE-GRAINED
CRYSTALLINE;
Alteration : SLIGHTLY;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <10
STRONGLY ZONED;
OLIVINE ( 1%)
MICROPHENOS;
Replacement: PYRITE
PRESENT AS DISPERSED GRAINS THROUGHOUT PCE 2;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 700.47
Core: 68 Top of Core Depth (m) : 696.00
Sect: 3 Top of Section Depth(m): 699.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (4-12), 1B (12-29), 1C (28-57), 1D (57-72),
1E (73-83), 2A (86-106), 2B (106-111), 2C (112-122),
2D (123-140), 2E (140-147);
Texture : PLAG-CPX-OL PHYRIC, COARSE-GRAINED GNDMASS;
Structure : VEINS FILLED WITH CARB AND A SMEC LINING, VEINS
<0.5MM;
Alteration : MOD;
Groundmass : MAGNETITE
COMMON;
Phenocrysts: PLAGIOCLASE (12-18%)
Size(mm): 2-3
OCCURS AS SMALL PHENOS AND RARELY AS ZONED
MEGACRYSTS <10MM;
CLINOPYROXENE ( 10%)
Size(mm): 2-3
AUGITE;
OLIVINE ( 5%)
Size(mm): 2-3
ALTERED EUHEDRAL;
Replacement: CARBONATE
SMECTITE
PYRITE
<1% AND 0.2-0.5MM GRAIN SIZES, OCCUR AS
DISSEMINATED GRAINS ALONG VEINS AND THROUGHOUT
GNDMASS;
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 701.92
Core: 68 Top of Core Depth (m) : 696.00
Sect: 4 Top of Section Depth(m): 700.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-12), 1B (13-17), 1C (18-27), 1D (27-30),
1D1 (30-44), 1E (45-48), 2 (51-65), 3 (69-81),
4A (84-87), 4B (87-142);
Texture : INCREASINGLY PLAG-CPX-OL PHYRIC BASALT, PCES 1A-B
CONTAIN A SHARP CONTACT BETWEEN COARSELY CRYSTALLINE
BASALT AND A LESS PHYRIC APHANITIC TO FINE-GRAINED
GNDMASS, THE CONTACT IS MARKED BY AN ALTERED
CHILLED MARGIN IN THE LESS PHYRIC BASALT AND A 5MM
THICK VEIN, CHILLED MARGINS IN PCES 1A-C, PCES 1C-4
REPRESENT A MASSIVE COOLING UNIT WHICH BECOMES
INCREASINGLY COARSE GRAINED AND PHYRIC BELOW A 3-4CM
THICK CHILLED MARGIN IN PCE 1C;
Structure : 5MM THICK VEIN FILLED WITH SMEC CONTAINING
INCLUSIONS OF PLAG IN PCES 1A-B, GNDMASS LARGELY
FRACTURED AND REPLACED BY CLAY IN PCES 1C-E, THIN
VEINS FILLED WITH SMEC IN PCES 2-3;
Alteration : EXTENSIVELY
TO BOTTOM OF PCE 1E;
SLIGHTLY
REST OF SECTION;
Groundmass : MAGNETITE
PCES 2-4;
PYRITE
OCCASIONAL XTLS IN PCES 2-4;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): 3-4
PCES 1C-E;
PLAGIOCLASE ( 15%)
Size(mm): <10
PCES 2-4;
CLINOPYROXENE ( <10%)
Size(mm): 1-2
AUGITE, COMMONLY IN GLOMEROCRYSTS WITH PLAG;
OLIVINE ( 8-10%)
Size(mm): 3-4
PCES 1C-E, DECREASES TO 1-2MM IN PCES 2-4;
Replacement: SMECTITE
CLAY
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1300 Analyst: Pertsev, N.
Hole: 417D Sample Midpoint (m) : 703.30
Core: 68 Top of Core Depth (m) : 696.00
Sect: 5 Top of Section Depth(m): 702.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-25), 2 (28-70), 3 (72-102), 4 (105-130);
Texture : PLAG-CPX-OL PHYRIC;
Structure : VEINS IN PCES 1-2 FILLED WITH SMEC+CARB AND
OCCASIONAL GRAINS OF PYRITE;
Alteration : MOD;
Groundmass : MAGNETITE
Size(mm): 0.1-0.2
ABUNDANT AS DISSEMINATED GRAINS;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <10
CLINOPYROXENE ( 10%)
Size(mm): <3
AUGITE;
OLIVINE ( 10%)
Size(mm): <2
REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Bryan, W.
Hole: 417D Sample Midpoint (m) : 704.93
Core: 68 Top of Core Depth (m) : 696.00
Sect: 6 Top of Section Depth(m): 703.50
LITHOLOGY: PLAG-PYX MODERATELY PHYRIC BASALT;
MASSIVE
Piece No. : PCE 1A (2-25), 1B (25-36), 1C (37-59), 1D (60-75),
1E (75-100), 1F (101-122), 1G (122-143);
Texture : PLAG-PYX MODERATELY PHYRIC, DOLERITIC COARSE-GRAINED
GNDMASS (0.3-0.8MM);
Structure : MINOR VEINS FILLED WITH CARB;
Alteration : MOD
WIDESPREAD ALTERATION ACCENTUATED ALONG VEINS
APPEARS TO BE MINERAL SPECIFIC (POSSIBLY
DEUTERIC);
Groundmass : PLAGIOCLASE
PYROXENE
OLIVINE
ALTERED OLIVE GREEN GRANULES;
NUMEROUS PSEUDOMORPHS FILLED BY GREEN OR BROWN
SMEC;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): 0.5-15
COMMONLY DISPLAY COMPLEX OSCILLATORY ZONING,
NUMEROUS INTERGROWTHS WITH PYX MICROPHENOS AND
WHITE INCLUSIONS, ROUNDED;
Replacement: CARBONATE
SMECTITE
ILMENITE
IN GNDMASS;
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Swanson, D.
Hole: 417D Sample Midpoint (m) : 706.46
Core: 69 Top of Core Depth (m) : 705.00
Sect: 1 Top of Section Depth(m): 705.00
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (4-5), 1B (5-26), 1C (27-60), 1D (60-68),
2A (71-84), 2B (85-125), 2C (125-147);
Texture : PLAG MODERATELY PHYRIC, HOLOCRYSTALLINE COARSE-
GRAINED (0.5MM) GNDMASS;
Structure : VEINS FILLED WITH CARB OR SMEC;
Alteration : MOD;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
FRESH;
Phenocrysts: PLAGIOCLASE
Size(mm): <10
ZONED;
Replacement: SMECTITE
CARBONATE
PYRITE
DISSEMINATED IN VEINS AND GNDMASS;
Leg : 52 Top/Bottom Interval(mm): 0/ 380 Analyst:
Hole: 417D Sample Midpoint (m) : 706.88
Core: 69 Top of Core Depth (m) : 705.00
Sect: 2 Top of Section Depth(m): 706.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-17), 2A (20-28), 2B (28-38);
Texture : PLAG-OL PHYRIC BASALT, COARSE-GRAINED (6.5MM)
INTERSERTAL TO SUBOPHITIC OR HOLOCRYSTALLINE
GNDMASS;
Structure : VEIN IN PCE 1 FILLED WITH SMEC+CARB+PYRITE;
Alteration : SLIGHTLY;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
PARTIALLY FRESH;
MAGNETITE
PYRITE
DISSEMINATED;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <10
ZONED;
OLIVINE
Size(mm): <0.8
MICROPHENOS;
Replacement: SMECTITE
CARBONATE
PYRITE
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