Leg : 65 Top/Bottom Interval(mm): 0/1080 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 111.08
Core: 2 Top of Core Depth (m) : 101.00
Sect: 7 Top of Section Depth(m): 110.00
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCES 1 (0-13), 3 (23-26), 4 (27-34), 5A (36-42),
5B (42-44), 6 (46-49), 7 (51-63), 8 (65-68),
9 (71-73), 10 (75-78), 11 (80-84), 12 (86-94),
13 (95-102), 14 (105-108);
Texture : MEDIUM-GRAINED, MOD PHYRIC;
Alteration : FRESH TO SLIGHT
PCE 1 IS FRESH WITH PCES(3-14) SHOWING INCREASED
ALTERATION;
Comments : PCE 1 IS GREY, PCES(3-14) ARE WHITE GREY, MAY BE TWO
COOLING UNITS WITH BOUNDARY ON PCE 2 BUT
PETROGRAPHICALLY SIMILAR;
Vesicles : Size(mm): 1-1.5 Percent:
Location: Filling: SMECTITE
NO OBVIOUS VESICLES IN PCE 1, VESICLES IN PCES
(3-14) ARE UNEVENLY DISTRIBUTED AND NOT ABUNDANT;
Phenocrysts: PLAGIOCLASE ( 2-5%)
Size(mm): 3-6
PCE 1 HAS 2-3% PHENOS RANGING UP TO 3-4MM, PCES
(3-14) HAVE ABOUT 3-5% PHENOS WITH SIZES TO 5-6MM
BUT USUALLY 3MM;
OLIVINE ( TR%)
Size(mm): 1-2
CLINOPYROXENE ( TR%)
Size(mm): 1-2
ID OF PHENOS OF OL AND/OR CPX ARE QUESTIONABLE AND
VERY RARE, THESE PHENOS ARE REPLACED BY GREENISH-
BLUE SMECTITE(?)(SEE PCE 14);
Replacement: SMECTITE
GREENISH BLUE SMECTITE ID UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 170/ 200 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 110.20
Core: 2 Top of Core Depth (m) : 101.00
Sect: 7 Top of Section Depth(m): 110.17
LITHOLOGY: SEDIMENT;
SILTY CLAY;
Piece No. : PCE 2 (17-20);
Comments : OLIVE BLACK;
Leg : 65 Top/Bottom Interval(mm): 40/ 740 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 111.24
Core: 3 Top of Core Depth (m) : 110.50
Sect: 1 Top of Section Depth(m): 110.54
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1 (4-6), 2 (7-12), 3 (15-21), 4 (23-27),
5 (33-37), 6 (41-52), 7 (55-58), 8 (61-74);
Texture : MOD PHYRIC, MED-GRAINED, OL(ALTERED TO GREEN SMEC)-
PLAG GLOMEROPHYRIC AGGREGATES;
Structure : VEIN 3MM WIDE OF CALCITE AND SMECTITE IN PCE 5;
Alteration : SLIGHTLY;
Comments : GREY, SIMILAR TO CORE 2-7 PCE 14;
Phenocrysts: PLAGIOCLASE ( <3%)
Size(mm): 1-4
OLIVINE
Size(mm): 1-2
FEW PHENOS OF OL ALTERED TO GREEN SMECTITE IN
GLOMEROPHYRIC AGGREGATES WITH PLAG;
Replacement: CALCITE
SMECTITE
Minerals Replaced: OL
Leg : 65 Top/Bottom Interval(mm): 750/1470 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 111.97
Core: 3 Top of Core Depth (m) : 110.50
Sect: 1 Top of Section Depth(m): 111.25
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 9 (75-85), 10 (89-95), 11 (97-105),
12 (109-112), 13 (117-127), 14 (132-147);
Texture : APHYRIC;
Alteration : SLIGHTLY;
Comments : ANOTHER COOLING UNIT BUT NO CHILLED MARGINS OBSERVED
BETWEEN PCES(8-9);
Vesicles : Size(mm): <1 Percent: 5
Location: Filling: SMECTITE
VESICULAR BASALT;
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/ 270 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 112.27
Core: 3 Top of Core Depth (m) : 110.50
Sect: 2 Top of Section Depth(m): 112.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (2-27);
Texture : APHYRIC, MEDIUM-GRAINED;
Structure : SOME VEINS ARE 3MM AND 5-7MM THICK AND FILLED WITH
CARB AND SMEC AND VERY RARE PYRITE WITH THE WALLS OF
THE VEINS COVERED BY SMEC;
Alteration : MOD;
Comments : GREY, IT IS THE SAME UNIT AS 3-1;
Vesicles : Size(mm): 0.5-1.5 Percent: 5-7
Location: Filling: SMEC, CARB, ZEOL
WHITE-BLUE AND WHITE-GREENISH MATERIAL FILLS
VESICLES;
Replacement: SMECTITE
CARBONATE
ID UNCERTAIN;
PYRITE
VERY RARE;
Leg : 65 Top/Bottom Interval(mm): 0/1450 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 120.95
Core: 4 Top of Core Depth (m) : 119.50
Sect: 1 Top of Section Depth(m): 119.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-12), 1B (12-18), 2A (20-28), 2B (29-37),
2C (37-52), 2D (52-57), 3A (59-61), 3B (70-80),
4 (82-97), 5 (100-104), 6 (106-118), 7 (120-123),
8 (126-135), 9 (137-145);
Texture : APHYRIC, MEDIUM-GRAINED, RARE MICROPHENOS;
Structure : ROCK IS FRACTURED PCES(2A,6,8) AND FRACTURES ARE
FILLED WITH CARB AND SMEC;
Alteration : MOD TO STRONG;
Comments : GREY;
Vesicles : Size(mm): 0.5-1.5 Percent: 3-5
Location: Filling: SMEC, CARB
VESICLES UNEVENLY DISTRIBUTED;
Phenocrysts: PLAGIOCLASE
RARE MICROPHENOS OF PLAG PCE 6;
Replacement: SMECTITE
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/1480 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 122.48
Core: 4 Top of Core Depth (m) : 119.50
Sect: 2 Top of Section Depth(m): 121.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-22), 2 (24-34), 3A (36-41), 3B (41-54),
4 (57-65), 5 (68-78), 6 (80-98), 7 (100-108),
8 (110-120), 9 (122-137), 10 (141-148);
Texture : APHYRIC, MEDIUM-GRAINED, RARE MICROPHENOS;
Structure : FRACTURES FILLED WITH SMEC AND CARB, MASSIVE;
Alteration : SLIGHTLY;
Comments : GREY;
Vesicles : Size(mm): 0.5-1.0 Percent: <1
Location: Filling: SMEC
VESICLES UNEVENLY DISTRIBUTED;
Phenocrysts: PLAGIOCLASE ( TR%)
SOME PCES CONTAIN MICROPHENOS OF PLAG;
Replacement: SMECTITE
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/1480 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 123.98
Core: 4 Top of Core Depth (m) : 119.50
Sect: 3 Top of Section Depth(m): 122.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-6), 2 (10-21), 3 (24-34), 4 (36-38),
5 (47-57), 6 (59-67), 7 (71-77), 8A (80-96),
8B (95-103), 9 (95-113), 10 (115-131), 11 (134-139),
12 (142-148);
Texture : APHYRIC, MEDIUM-GRAINED, RARE PLAG PHENOS;
Structure : FRACTURES FILLED WITH SMEC AND CARB AND VERY RARE
PYRITE, MASSIVE;
Alteration : SLIGHT TO MOD;
Comments : GREY;
Vesicles :
Location: Filling: SMECITITE
VESICLES FEW AND SMALL AND UNEVENLY DISTRIBUTED;
Phenocrysts: PLAGIOCLASE ( TO 3%)
VERY RARE PLAG PHENOS AND 3MM PHENO IN PCE 10;
Replacement: SMECTITE
CARBONATE
PYRITE
VERY RARE;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 125.50
Core: 4 Top of Core Depth (m) : 119.50
Sect: 4 Top of Section Depth(m): 124.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-9), 2 (10-25), 3 (26-37), 4 (40-47),
5 (48-59), 6 (60-70), 7 (72-80), 8 (82-87),
9A (89-95), 9B (96-98), 10 (101-117), 11 (110-120),
12 (122-129), 13 (131-137), 14 (140-149);
Texture : APHYRIC;
Structure : MASSIVE, VEINS OF CALCITE AND SMECTITE;
Comments : GREY;
Vesicles :
Location: Filling: SMECTITE
PCES(5-9) HAVE A FEW VESICLES FILLED WITH SMEC;
Phenocrysts: PLAGIOCLASE
PCES(11,14) HAVE ONE OR TWO PLAG PHENOS;
Groundmass : MICROCRYST GROUNDMASS
POSSIBLY HAS OL-CPX-PLAG IN MATRIX;
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 127.00
Core: 4 Top of Core Depth (m) : 119.50
Sect: 5 Top of Section Depth(m): 125.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-10), 2 (14-34), 3A (35-43), 3B (44-49),
4 (50-60), 5 (60-79), 6 (80-85), 7 (86-90),
8 (91-107), 9 (107-118), 10 (120-132), 11 (134-141),
12 (142-150);
Texture : APHYRIC;
Structure : MASSIVE, FEW VEINS OF CALCITE AND SMECTITE;
Comments : GREY, SIMILAR TO 4-4;
Replacement: SMECTITE
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 128.50
Core: 4 Top of Core Depth (m) : 119.50
Sect: 6 Top of Section Depth(m): 127.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (0-21), 1A (23-26), 2B (35-38), 3 (40-48),
4 (50-55), 5 (56-64), 6 (65-78), 7 (80-89),
8 (90-96), 9 (98-107), 10 (108-115), 11 (117-127),
12 (128-140), 13 (141-150);
Texture : APHYRIC;
Structure : MASSIVE, VEINS OF CALCITE AND SMECTITE AND SULFIDE;
Comments : GREY, SIMILAR TO 4-5, PCES 2A AND 2B DO NOT APPEAR
TO FIT TOGETHER;
Replacement: SMECTITE
CALCITE
SULFIDE
Leg : 65 Top/Bottom Interval(mm): 0/ 200 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 128.70
Core: 4 Top of Core Depth (m) : 119.50
Sect: 7 Top of Section Depth(m): 128.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-10), 2 (13-20);
Texture : APHYRIC;
Structure : MASSIVE;
Comments : GREY, SIMILAR TO 4-6;
Leg : 65 Top/Bottom Interval(mm): 0/ 50 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 133.05
Core: 7 Top of Core Depth (m) : 133.00
Sect: 1 Top of Section Depth(m): 133.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (1-5);
Texture : APHYRIC(QUESTIONABLE), MEDIUM-GRAINED;
Comments : SAMPLE CONSISTS OF SINGLE PCES OF OLIVE-BLACK(5Y2/1)
SILTY CLAY AND APHYRIC(?) BASALT;
Leg : 65 Top/Bottom Interval(mm): 90/1500 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 134.50
Core: 7 Top of Core Depth (m) : 133.00
Sect: 1 Top of Section Depth(m): 133.09
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 2 (9-43), 3 (45-90), 4A (93-105), 4B (104-125),
4C (125-136), 4D (137-145);
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED, SOME GLOMEROPHYRIC
AGGREGATES OF PLAG;
Structure : MASSIVE, MODERATELY FRACTURED PCE(4) AND FRACTURES
FILLED WITH CARB & SMEC & RARE PYRITE;
Alteration : SLIGHTLY;
Comments : GREY;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 2-3
PREVALENT PHENO;
OLIVINE
Size(mm): 2-3
CLINOPYROXENE
Size(mm): 2-3
FEW PHENOS OF OL OR CPX REPLACED BY SMEC AND CARB;
Replacement: SMECTITE
CARBONATE
PYRITE
RARE;
Leg : 65 Top/Bottom Interval(mm): 0/1300 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 135.80
Core: 7 Top of Core Depth (m) : 133.00
Sect: 2 Top of Section Depth(m): 134.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (2-6), 2A (10-30), 2B (29-40), 2C (40-85),
3 (88-102), 4 (105-115), 5 (116-130);
Texture : SPARSELY PHYRIC, GLOMEROPHYRIC CLOTS OF PLAG(WITH
POSSIBLE SPINEL INCLUSION) WITH ALTERED OL(?) OR
CPX(?);
Structure : MASSIVE, VEINS, RARE HAIRLINE FRACTURES LINED WITH
SMEC, VEINS OF CALCITE & SMEC & SULFIDES AND
POSSIBLY ZEOLITES ABOUT 1-2MM IN WIDTH;
Alteration : FRESH;
NO OBVIOUS ALTERATION HALOS, SLIGHT EFFERVESCENCE
WITH HCL WITHIN 1CM OF SOME VEINS AND ALSO INSIDE
SOME OF THE PLAGIOCLASES-CAN'T TELL IF ALTERATION
PRODUCT OR ALONG FINE CRACK;
Comments : LIGHT GREY, CONTINUATION OF COOLING UNIT IN 7-1;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): TO 3-5
SPINEL
SOME PLAG PHENOS HAVE VERY SMALL EUHEDRAL DARK
INCLUSIONS-POSSIBLY SPINEL(?), ALSO GLOMEROPHYRIC
CLOTS WITH OL(?) AND CPX(?) ALTERED IN ONE
AGGREGATE BUT VERY SMALL(0.5);
Replacement: SMECTITE
CALCITE
SULFIDE
ZEOLITE
ID ZEOLITE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 750 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 136.75
Core: 7 Top of Core Depth (m) : 133.00
Sect: 3 Top of Section Depth(m): 136.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (1-75);
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED;
Structure : MASSIVE, FRACTURES FILLED WITH CARB & SMEC & TRACE
PYRITE;
Alteration : FRESH;
Comments : GREY;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): TO 3-4
OLIVINE ( TR%)
CLINOPYROXENE ( TR%)
BOTH OL AND CPX PHENOS ARE TRACE AND COMPLETELY
REPLACED BY SECONDARY MINERALS(SMEC AND CARB(?));
Replacement: SMECTITE
CARBONATE
PYRITE
Leg : 65 Top/Bottom Interval(mm): 0/ 50 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 137.55
Core: 8 Top of Core Depth (m) : 137.50
Sect: 1 Top of Section Depth(m): 137.50
LITHOLOGY: SEDIMENT;
Piece No. : PCE 1 (0-5);
Comments : BROWN SILTSTONE;
Leg : 65 Top/Bottom Interval(mm): 50/ 90 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 137.59
Core: 8 Top of Core Depth (m) : 137.50
Sect: 1 Top of Section Depth(m): 137.55
LITHOLOGY: SEDIMENT;
Piece No. : PCE 2 (5-9);
Comments : BEDDED SANDSTONE POSSIBLY HYALOCLASTITE(?) IN PART,
GREENISH(SMECTITE(?) REPLACING GLASS ?) TO DARK,
PROBABLY SAME MATERIAL AS 5A-B;
Leg : 65 Top/Bottom Interval(mm): 100/ 140 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 137.64
Core: 8 Top of Core Depth (m) : 137.50
Sect: 1 Top of Section Depth(m): 137.60
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 3 (10-14);
Texture : FINE-GRAINED, APHYRIC;
Structure : FRACTURE PATTERN(CALCITE VEINLETS);
Comments : GRAIN SIZE AND POSITION SUGGEST IT IS TOP OF MASSIVE
BASALT UNIT STARTING WITH 6A;
Replacement: CALCITE
Leg : 65 Top/Bottom Interval(mm): 150/ 200 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 137.70
Core: 8 Top of Core Depth (m) : 137.50
Sect: 1 Top of Section Depth(m): 137.65
LITHOLOGY: PLAG MOD PHYRIC BASALT;
Piece No. : PCE 4 (15-20);
Texture : PORHYRITIC, GLASSY CRUST;
Comments : POSSIBLY FALLEN IN FROM ABOVE(UPPER-MOST BASALT
UNIT(?));
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): TO 4
GLOMEROCRYSTS OF PLAG PLUS MINOR OL(?) AND MAYBE
CPX(?);
Leg : 65 Top/Bottom Interval(mm): 210/ 280 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 137.78
Core: 8 Top of Core Depth (m) : 137.50
Sect: 1 Top of Section Depth(m): 137.71
LITHOLOGY: TUFFACEOUS SANDSTONE;
Piece No. : PCES 5A (21-23), 5B (25-28);
Texture : TUFFACEOUS, ABUNDANT BASALTIC(?) GLASS SHARDS
POSSIBLY ADMIXED WITH NON-VOLCANIC DETRITUS, CROSS
LAMINATION;
Structure : CUT AND FILL STRUCTURE, ABUNDANT ZEOLITE(?) IN SMALL
CAVITIES;
Comments : DARK-GREENISH;
Replacement: ZEOLITE
ID ZEOLITE UNCERTAIN;
SMECTITE
ID SMECTITE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 300/1440 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 138.94
Core: 8 Top of Core Depth (m) : 137.50
Sect: 1 Top of Section Depth(m): 137.80
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 6A (30-35), 6B (35-44), 6C (45-50),
6D (50-60), 7A (61-75), 7B (75-80), 7C (81-96),
7D (92-105), 7E (105-113), 7F (124-143);
Texture : APHYRIC, GRADING FROM FINE-GRAINED TO MEDIUM-GRAINED
AT BASE;
Structure : FRACTURES MOD COMMON AND STEEPLY INCLINED TO
SUBVERTICAL SOME HORIZONTAL AND FILLED WITH LIGHT
GREEN SMECTITE AND CARB(IN CENTER), FILLING OF
SUBVERTICAL CRACKS IN 6A POSTDATES FILLING OF
SUBHORIZONTAL VEIN;
Alteration : FRESH
APART FROM THE SMEC-CARB-ZEOL(?) VEINLETS;
Comments : GREY;
Vesicles : Size(mm): Percent: 0
Replacement: ZEOLITE
ID ZEOLITE UNCERTAIN;
SMECTITE
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/1410 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 140.41
Core: 8 Top of Core Depth (m) : 137.50
Sect: 2 Top of Section Depth(m): 139.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-16), 1B (16-31), 2 (34-50), 3 (53-68),
4 (71-84), 5 (86-100), 6 (103-114), 7 (116-118),
8 (121-126), 9 (137-141);
Texture : APHYRIC, MEDIUM-GRAINED;
Structure : MASSIVE, FRACTURES FILLED WITH CARB AND SMEC;
Alteration : FRESH TO MODERATE
PCE 9 IS MODERATE;
Comments : SAME COOLING UNIT AS 8-1, PCE 1A FITS WITH PCE 7F OF
8-1;
Replacement: SMECTITE
NEAR FRACTURES GNDMASS OF BASALT IS REPLACED BY
BLUE-GREENISH MATERIAL PCES(6.9)-SMEC;
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/ 600 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 141.10
Core: 8 Top of Core Depth (m) : 137.50
Sect: 3 Top of Section Depth(m): 140.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-25), 1B (27-40), 1C (40-60);
Texture : APHYRIC, MEDIUM-GRAINED;
Structure : FRACTURES FILLED WITH CARB AND SMECTITE;
Alteration : SLIGHTLY;
Comments : GREY, SAME UNIT AS 8-2;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Replacement: SMECTITE
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/ 40 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 146.54
Core: 9 Top of Core Depth (m) : 146.50
Sect: 1 Top of Section Depth(m): 146.50
LITHOLOGY: SEDIMENT;
Piece No. : PCE 1 (1-4);
Leg : 65 Top/Bottom Interval(mm): 60/ 270 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 146.77
Core: 9 Top of Core Depth (m) : 146.50
Sect: 1 Top of Section Depth(m): 146.56
LITHOLOGY: APHYRIC BASALT;
MASSVIE;
Piece No. : PCES 2 (6-16), 3 (18-27);
Texture : APHYRIC, MEDIUM-GRAINED;
Structure : THIN FRACTURES FILLED WITH CARB AND SMECTITE(PCE 3),
MASSIVE;
Alteration : SLIGHTLY;
Comments : GREY, THIS MAY BE A NEW COOLING UNIT, GREY;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Replacement: SMECTITE
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 300/ 350 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 146.85
Core: 9 Top of Core Depth (m) : 146.50
Sect: 1 Top of Section Depth(m): 146.80
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 4 (30-34);
Texture : APHYRIC, VERY FINE-GRAINED;
Comments : COULD BE TOP OF NEW COOLING UNIT, GREY;
Leg : 65 Top/Bottom Interval(mm): 370/ 450 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 146.95
Core: 9 Top of Core Depth (m) : 146.50
Sect: 1 Top of Section Depth(m): 146.87
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 5 (37-45);
Texture : APHYRIC, FINE-GRAINED;
Structure : FRACTURES FILLED WITH CARB AND SMEC;
Alteration : SLIGHTLY;
Comments : GREY;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Replacement: CARBONATE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 170.50
Core: 12 Top of Core Depth (m) : 169.00
Sect: 1 Top of Section Depth(m): 169.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1 (0-7), 2 (10-19), 3 (20-23), 4A (25-30),
4B (30-37), 5 (40-50), 6A (53-59), 5B (59-77),
6C (75-83), 7 (86-90), 8 (92-105), 9A (107-117),
9B (118-127), 10 (129-134), 11 (136-150);
Texture : PHYRIC, MEDIUM-GRAINED, HAS POIKILITIC GRAINS OF
PAQUES(?) AND IS IN GLOMEROCRYSTIC AGGREGATES WITH
OL, GLASS MARGIN NEAR TOP;
Structure : SMECTITE VEINS SOME WITH MINOR CALCITE;
Alteration : FRESH
WHERE OL IS IN CONTACT WITH PLAG IT IS FRESH;
Comments : THREE COOLING UNITS; 1(0-40) & 2(40-90) & 3(90-150),
GREY;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE
VESICULAR NEAR OR AT GLASS MARGIN NEAR TOPS;
Phenocrysts: COMBINATION ( 7-10%)
Size(mm): 5-10
INCLUDES PLAG-OL PHENOS WITH OL SMALLER AND
PARTIALLY TO COMPLETELY ALTERED TO SMEC, SOME
FRESH PLAG PHENOS MORE ABUNDANT, POIKILITIC GRAINS
OF OPAQUES(?) WITH PLAG IN GLOMEROPHYRIC
AGGREGATES WITH OL;
Replacement: SMECTITE
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Flower, M.
Hole: 483B Sample Midpoint (m) : 172.00
Core: 12 Top of Core Depth (m) : 169.00
Sect: 2 Top of Section Depth(m): 170.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCES 1 (0-10), 2 (13-19), 3 (21-24), 4 (26-34),
5 (36-41), 6 (43-53), 7 (55-66), 8 (67-89),
9 (90-99), 10 (102-111), 11 (114-125), 12 (127-132),
13 (134-140), 14 (140-150);
Texture : MOD PHYRIC WITH PCES 12 & 13 SPARSELY PHYRIC AND
DECREASE IN PHENO CONTENT IN PCES 6-10, GRAIN SIZE
INCREASES DOWNWARDS FROM PCE 2(GLASSY MARGIN) BUT
DECREASES IN PCE 4 WHICH MAY BE GLASSY, PLAG-OL
GLOMEROCRYSTIC CLOTS;
Structure : FAIRLY WELL FRACTURED WITH SEVERAL VEINS-PCE 4 HAS
SMECTITE VEINS ALSO COATING FRACTURES IN PCES(6-8)
ARE SMEC SOME CARB AND ZEOL(?);
Alteration : SLIGHT;
PCES(4,6-8,13) SHOW MORE ALTERATION;
Comments : SEVERAL VEINS CONTINUING FROM 12-1 ALTHOUGH NEW
COOLING UNIT BEGINS IN PCE 2;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): TO 10
OLIVINE
Size(mm): <1
OL IS SUBSIDIARY TO PLAG IN PCES(1-5), OL IS
MOSTLY ALTERED EXCEPT WHEN OCCURRING WITH PLAG IN
GLOMEROCRYSTIC CLOTS;
Replacement: SMECTITE
CARBONATE
RARE BUT OCCASIONALLY PRESENT WITH SMEC;
ZEOLITE
ID ZEOLITE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 350 Analyst: Flower, M.
Hole: 483B Sample Midpoint (m) : 172.35
Core: 12 Top of Core Depth (m) : 169.00
Sect: 3 Top of Section Depth(m): 172.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (0-11), 2 (13-22), 3 (25-30), 4 (32-36);
Texture : SPARSELY PHYRIC, PCE 4 AS APHYRIC AND FINER-GRAINED-
COULD BE GLASSY;
Structure : PCE 1 HAS FRAGMENTS SHOWING GREEN SMECTITE COATINGS;
Alteration : FRESH
PCES 2-3 COMPARATIVELY FRESH;
Phenocrysts: PLAGIOCLASE
OLIVINE
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 176.00
Core: 13 Top of Core Depth (m) : 174.50
Sect: 1 Top of Section Depth(m): 174.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCES 1A (0-11), 1B (12-25), 1C (26-33), 1D (34-36),
1E (37-51), 1F (51-57), 1G (58-65), 2A (66-74),
2B (73-91), 2C (90-97), 2D (96-106), 2E (107-115),
2F (115-124), 3 (125-132), 4A (133-139),
4B (140-150);
Texture : MOD PHYRIC, FINE TO MEDIUM-GRAINED WITH WELL
DEVELOPED FINE-GAINED BOUNDARIES AT CONTACTS OF
COOLING UNITS(PCES 1G&2A,2F&3) & THE CENTRAL PARTS
ARE COARSER-GRAINED OPHIMOTTLED, FINE-GRAINED ZONES
ABOUT 5CM ON EITHER SIDE OF CENTRAL COOLING UNIT AND
ABOUT 3CM AT BOTTOM AND TOP OF UPPER AND LOWER
COOLING UNIT;
Structure : FRACTURING MODERATE DOMINANTLY SUBHORIZONTAL
ESPECIALLY NEAR COOLING MARGINS, THICKER VEIN
FILLINGS MOSTLY SUBVERTICAL, CRACKS FILLED WITH
SMECTITE;
Alteration : MOD
IRREGUALR "DISSOLVED" LOOKING PART IN PCE 4A AND
TOP OF PCE 4B APPEARS TO BE ALTERATION FRACTURE
FILLED WITH SMECTITE AND ZEOLITE AND SULFIDE;
Comments : THREE COOLING UNITS: PCES(1A-1G) MAIN AND LOWER PART
THAT MAY HAVE STARTED IN 12-3 PCE 2 AND THE SECOND
IS A COMPLETE UNIT PCES(2A-3B) WITH THE THIRD ONE
CONSISTING OF PCES(3-4B) AND ARE THE BEGINNING OF A
NEW COOLING UNIT, DARK GREY;
Vesicles : Size(mm): <1TO<<1 Percent:
Location: Filling: SMECTITE
Shape : ROUND
GENERALLY <1 TO <<1% BUT SLIGHTLY MORE ABUNDANT
NEAR TOP OF COOLING UNIT(1E,3), ID LIGHT GREEN
SMEC FILLING VESICLES UNCERTAIN;
Phenocrysts: PLAGIOCLASE ( 2-4%)
Size(mm): <2
MOSTLY MICROPHENOS WITH RARE LARGE ROUNDED(?)
PHENOS UP TO 5MM;
OLIVINE ( 1-2%)
Size(mm): <3
MOSTLY REPLACED WHEN SINGLE CRYSTAL BUT SOME FRESH
CHIEFLY WHEN INTERGROWN WITH PLAG;
CLINOPYROXENE ( <<1%)
RARE GREEN TRANSLUCENT CPX;
SPINEL
POSSIBLY SOME SPINEL;
AMOUNT AND TYPE OF PHENOS SIMILAR IN ALL THREE
COOLING UNITS BUT SMALLER & LESS ABUNDANT IN 12-1
AND 12-2 TO PCE 7;
Replacement: SMECTITE
ID SMEC UNCERTAIN;
SULFIDE
MINOR PATCHY SULFIDE ON COOLING UNIT BOUNDARIES;
CALCITE
MINOR
ZEOLITE
PCES(1B,4A);
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 177.50
Core: 13 Top of Core Depth (m) : 174.50
Sect: 2 Top of Section Depth(m): 176.00
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
PILLOW;
Piece No. : PCES 1 (0-4), 2 (5-10), 3A (11-19), 3B (19-25),
3C (25-30), 4A (31-37), 4B (39-46), 5 (45-55),
6 (56-66), 7A (67-73), 7B (70-79), 8 (80-85),
9A (95-102), 9B (95-103), 10A (104-113),
10B (113-117), 11 (120-124), 12 (125-134),
13 (135-142), 14 (142-150);
Texture : PHYRIC, GLASSY CURVED RINDS ON THINNER AND FINER-
GRAINED COOLING UNITS, PHENO CONTENT MORE VARIABLE
AND POSSIBLY CONCENTRATED NEAR MARGIN(PCE 11);
Structure : MORE FRACTURED THAN 13-1, PILLOW BASALT;
Comments : FIVE COOLING UNITS:PCES(1,2(MAY CONTINUE FROM 13-1),
3A-4B, 5-8, 9A-11, 12 ON), PETROGRAPHICALLY
IDENTICAL TO 13-1 EXCEPT THAT COOLING UNITS ARE
THINNER & FINER-GRAINED & HAVE GLASSY CURVED RINDS;
Alteration : SOME BUT LESS AMOUNTS OF ALTERATION MINERALS;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 179.00
Core: 13 Top of Core Depth (m) : 174.50
Sect: 3 Top of Section Depth(m): 177.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCES 1 (0-18), 2 (11-16), 3 (17-23), 4 (25-30),
5 (31-40), 6 (43-47), 7A (47-68), 7B (57-64),
7C (63-78), 8A (80-92), 8B (92-100), 9 (101-109),
10 (110-120), 11 (121-128), 12 (131-140),
13 (141-150);
Texture : MOD PHYRIC, FINE TO MEDIUM-GRAINED, PCES(9 AND TOP
OF 10) HAVE BOTRYOIDAL SMEC(?);
Alteration : SLIGHT
ALTERATION MINERALS SAME AS IN 13-1 AND 13-2,
ANOTHER AREA(9, TOP OF 10, 4) OF IRREGULAR
"DISSOLVED" CAVERNOUS BASALT WITH BOTRYOIDAL
SMEC(?) AND LEACHED HALO;
Comments : VERY SIMILAR TO 13-1 & 13-2, TWO COOLING UNITS: THE
FIRST APPEARS TO BE A CONTINUATION OF BASE OF 13-2
PCES(1-6) AND THE SECOND IS PCES(7A-13);
Vesicles : SOME SEGREGATION VESICLES IN PCES(7A-7C) WITH
MENISCUS IN LOWER PART;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
CPX PHENOS POSSIBLY SLIGHTLY MORE ABUNDANT THAN IN
UPPER COOLING UNITS OF THIS CORE;
Replacement: SMECTITE
COULD BE BOTRYOIDAL SMEC IN PCES(9,TOP OF 10),
ALTERATION MINERALS SAME IN 13-1 AND 13-2;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 181.50
Core: 14 Top of Core Depth (m) : 180.00
Sect: 1 Top of Section Depth(m): 180.00
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCES 1 (0-3), 2A (6-22), 2B (20-27), 2C (25-30),
2D (30-41), 2E (42-52), 3 (53-57), 4A (59-75),
4B (75-84), 5A (86-96), 5B (94-100), 6 (103-109),
7 (113-147), 8 (122-128), 9A (130-137),
9B (137-147), 9C (147-150);
Texture : MOD PHYRIC, FINE TO MEDIUM-GRAINED, GLASS NEAR
FRACTURES PALAGONATIZED;
Structure : FRACTURES FEW AND THIN & FILLED WITH CARB AND SMEC &
RARE PYRITE, GLASS(PCE 4A) FRACTURED SLIGHTLY AND
FILLED WITH SMEC AND CARB;
Alteration : SLIGHTLY;
Comments : DARK GREY, TWO OR THREE(?) COOLING UNITS: ONE UNIT
IS UP TO PCE 3 & THE SECOND UNIT IS TO PCE 4A AND
THE THIRD(?) IS FROM PCE 8;
Vesicles :
Location: Filling: SMEC,CARB
SOME VESICLES UNEVENLY DISTRIBUTED WITH MORE AT
TOP OF UNITS;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): 1.5-4
OLIVINE ( 1%)
Size(mm): 1.5-3
MOSTLY REPLACED BY SECONDARY MINERALS-SMEC AND
CARB(?);
CLINOPYROXENE ( <.5%)
Size(mm): TO 3
ID OF CPX UNCERTAIN;
SMECTITE
CARBONATE
PYRITE
RARE;
Leg : 65 Top/Bottom Interval(mm): 0/ 870 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 182.37
Core: 14 Top of Core Depth (m) : 180.00
Sect: 2 Top of Section Depth(m): 181.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCES 1 (2-11), 2 (15-26), 3A (27-35), 3B (35-41),
3C (42-47), 4 (50-54), 51 (56-61), 5B (62-67),
6 (71-76), 7 (79-87);
Texture : MOD PHYRIC, VERY FINE-GRAINED(NEAR GLASSY MARGIN) TO
FINE TO MEDIUM-GRAINED, SOME PLAG-OL GLOMEROPHYRIC
AGGREGATES;
Structure : FRACTURES FILLED WITH CARB AND SMEC;
Alteration : SLIGHTLY;
Comments : TWO COOLING UNITS: THE FIRST ONE IS A CONTINUATION
FROM CORE 14-1 AND INCLUDES PCES(1-3C) AND THE OTHER
IS FROM PCES(4-7), DARK GREY;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): 3-4
SOME PLAG-OL GLOMEROPHYRIC AGGREGATES;
OLIVINE
FRESH AND REPLACED BY SECONDARY MINERALS-SMEC AND
CARB(?);
CLINOPYROXENE ( TR%)
ID CPX QUESTIONABLE;
SMECTITE
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/ 70 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 184.57
Core: 15 Top of Core Depth (m) : 184.50
Sect: 1 Top of Section Depth(m): 184.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCE 1 (0-7);
Texture : MOD PHYRIC, FINE-GRAINED, SOME PLAG-OL GLOMEROPHYRIC
AGGREGATES;
Alteration : FRESH;
Comments : DARK GREY, MAY BE SAME COOLING UNIT AS CORE 14-2 PCE
(7);
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC, PYRITE
FEW A ND SMALL VESICLES, SMALL GRAINS OF TRACE
PYRITE PRESENT;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): TO 3
SOME PLAG-OL GLOMEROPHYRIC AGGREGATES;
OLIVINE ( TO 1%)
OL REPLACED BY SMEC AND CARB;
CLINOPYROXENE ( <1%)
Size(mm): 1-2
ID CPX QUESTIONABLE;
Replacement: SMECTITE
CARBONATE
PYRITE
SMALL GRAINS OF TRACE PYRITE PRESENT;
Leg : 65 Top/Bottom Interval(mm): 0/1460 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 195.46
Core: 17 Top of Core Depth (m) : 194.00
Sect: 1 Top of Section Depth(m): 194.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (0-5), 2 (5-10), 3A (12-20), 3B (14-22),
3C (22-29), 4 (31-35), 5 (35-44), 6 (47-53),
7 (56-64), 8 (65-68), 9 (71-78), 10A (80-90),
10B (90-96), 10C (96-105), 10D (105-112),
10E (111-121), 10F (119-128), 11A (130-139),
11B (139-146);
Texture : PHYRIC, FINE-GRAINED, SOME GLOMEROPHYRIC CLOTS OF
PLAG AND MINOR OL, PCE 3A HAS APHANITIC CHILLED
MARGIN(ABOUT 2CM WIDE) WHICH IS NOT TRUE GLASS;
Structure : VEINS OF SMEC AND PYRITE AND SOME MINOR CALCITE;
Alteration : FRESH TO SLIGHT
PCES(3A-3C) SLIGHTLY ALTERED;
Comments : TWO COOLING UNITS: THE FIRST ENDS AT PCE 3 AND THE
SECOND IS REST OF CORE;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): <2
OLIVINE
MINOR FRESH TO ALTERED OL;
Replacement: SMECTITE
CALCITE
PYRITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 197.00
Core: 17 Top of Core Depth (m) : 194.00
Sect: 2 Top of Section Depth(m): 195.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (0-8), 2A (11-17), 2B (18-21), 2C (20-26),
3 (27-35), 4 (35-43), 5 (45-53), 6 (55-65),
7A (65-74), 7B (75-81), 7C (82-90), 7D (90-98),
8A (100-109), 8B (110-115), 8C (115-124),
9 (126-131), 10A (133-139), 10B (140-150);
Texture : SPARSELY PHYRIC, FINE-GRAINED BUT GRAIN SIZE
COARSENS IN PCES(9-10), SOME PLAG-OL GLOMEROCRYSTS;
Structure : MASSIVE, VEINS-FRAGMENTS CONTAIN SMEC AND CALCITE &
SULFIDES, VEINS FINE AND BRANCHING;
Alteration : SLIGHT
LITTLE ALTERATION OTHER THAN COMPLETE OR PARTIAL
REPLACEMENT OF OL BY SMEC;
Comments : PCE 1 FITS WITH PCE 11B OF CORE 17-1, COMBINATION OF
COOLING UNIT IN CORE 17-1;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): TO 4
OCCURS BOTH AS ISOLATED PHENOS & IN GLOMEROCRYSTS
WITH OL;
OLIVINE ( TO 1%)
Size(mm): 1-5
Groundmass : PLAGIOCLASE
GROUNDMASS CONTAINS NUMEROUS ACICULAR PLAG;
Replacement: SMECTITE
CALCITE
SULFIDE
Leg : 65 Top/Bottom Interval(mm): 0/ 450 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 197.45
Core: 17 Top of Core Depth (m) : 194.00
Sect: 3 Top of Section Depth(m): 197.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
SIMILAR TO CORE 17-1 AND 17-2;
Piece No. : PCES 1 (2-10), 2 (10-15), 3 (17-25), 4 (27-35),
5 (35-45);
Texture : FINE-GRAINED, SPARSELY PHYRIC;
Comments : GREY;
Leg : 65 Top/Bottom Interval(mm): 0/ 200 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 199.20
Core: 18 Top of Core Depth (m) : 199.00
Sect: 1 Top of Section Depth(m): 199.00
LITHOLOGY: PLAG-OL-CPX SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (1-3), 2 (6-12), 3 (14-20);
Texture : SPARSELY PHYRIC, FINE-GRAINED;
Comments : TWO COOLING UNITS, PCES(2,3) MAY BE INTERCHANGED,
PCES(2,4) MAY BE PART OF PCES(5,6);
Phenocrysts: PLAGIOCLASE
OLIVINE
CLINOPYROXENE
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 200/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 200.50
Core: 18 Top of Core Depth (m) : 199.00
Sect: 1 Top of Section Depth(m): 199.20
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 4 (22-25), 5A (26-45), 5B (45-61), 5C (59-61),
5D (60-91), 5E (91-108), 5F (108-121), 6A (122-140),
6B (140-150);
Texture : SPARSELY PHYRIC;
Structure : VEINING PERVASIVE AND FILLED WITH SMEC AND CALCITE
AND SERPENTINE;
Alteration : EXT
ALTERATION HALOS 15MM WIDE BORDERS THE VEINS, THE
HALOS HAVE SPECKLED 1.5MM SERPENTINE(?) VESICLES;
Comments : GREY;
Vesicles : Size(mm): TO 32 Percent: 0-25
Location: C Filling: ALCITE,SMEC
SOME MAY HAVE SERPENTINE, SUSPECT THAT THE SMEC
AND/OR SERPENTINE BEARING "VESICLES" MAY HAVE BEEN
OL PHENOS, CALCITE BEARING ARE TRUE VESICLES AND
MANY CONTAIN PYRITE, INCREASE IN VESICLE
CONCENTRATION DOWNWARDS;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 2
OLIVINE
ALTERED TO SMEC AND SERPENTINE;
Replacement: SMECTITE
CALCITE
PYRITE
SERPENTINITE
ID SERPENTINE QUESTIONABLE;
Leg : 65 Top/Bottom Interval(mm): 0/1450 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 201.95
Core: 18 Top of Core Depth (m) : 199.00
Sect: 2 Top of Section Depth(m): 200.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1 (1-6), 2A (7-18), 2B (18-24), 2C (24-32),
3 (33-39), 4 (42-46), 5 (47-55), 6 (57-60),
7 (62-73), 8 (73-82), 9 (84-95), 10 (97-106),
11A (108-118), 11B (118-127), 12 (129-131),
13 (134-140), 14 (143-145);
Texture : MOD PHYRIC, GRAIN SIZE APPEARS TO DECREASE
DOWNWARDS;
Structure : 1MM SULFIDE-SMEC VEIN IN PCE 5, 1MM SMEC VEIN IN
PCE 11, BRANCHING IS VERY FINE, DISCONTINUOUS VEINS
OF SMEC-CALCITE IN OTHER PCES;
Alteration : EXT
PERVASIVE AND INTENSIVE PARTICULARLY IN PCES 1-7
WHERE APPROXIMATELY 30% OR MORE OF ROCK IS
COMPOSED OF SECONDARY MINERALS;
Comments : COMBINATION OF UNIT IN 18-1 BUT GRAIN SIZE(?) AND
VESICULARITY AND DEGREE OF ALTERATION APPEAR TO
DECREASE DOWNWARDS;
Vesicles : Size(mm): .5-3 Percent: 5-25
Location: Filling: SERP,SMECTITE
Location: Filling: CALCITE,SULFIDE
THERE ARE 20-25% VESICLES IN PCES(1-7) DECREASING
TO <5% IN PCE 14, NO SHARP DISTINCTION IN VESICLE
FILLINGS CLOSE TO VEINS AND IN FLOW INTERIOR AS IN
18-1 ALTHOUGH TENDENCY FOR BIMODALITY IN PCE 2A
SOME OF THE "APPARENT VESICLES" MAY BE PLUCKED
ALTERED OL;
Phenocrysts: PLAGIOCLASE ( <3%)
Size(mm): TO 4
OLIVINE
MINOR OL-% OF OL DIFFICULT TO DETERMINE BECAUSE OF
EXTENSIVE ALTERATION;
Replacement: SMECTITE
SOME EXPANDING VISIBLY WHEN WET;
SERPENTINITE
ID SERPENTINE UNCERTAIN;
CALCITE
SULFIDE
Leg : 65 Top/Bottom Interval(mm): 0/ 470 Analyst: Flower, M.
Hole: 483B Sample Midpoint (m) : 202.47
Core: 18 Top of Core Depth (m) : 199.00
Sect: 3 Top of Section Depth(m): 202.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1 (1-7), 2 (10-15), 3 (17-23), 4 (25-28),
5 (31-36), 6 (38-47);
Texture : MOD PHYRIC;
Structure : FRACTURES FILLED WITH CALCITE AND SMEC, YELLOW
COATING ON FRACTURES IN PCE 6;
Alteration : SLIGHTLY
GROUNDMASS PARTLY ALTERED TO SMEC AND CALCITE;
Comments : CONTINUOUS FROM 18-2 BUT LESS VESICULAR;
Vesicles : Size(mm): .1-.4 Percent: 1
LESS VESICULAR THAN 18-2, AMYGDULES MOSTLY FILLED
WITH CALCITE;
Phenocrysts: PLAGIOCLASE ( 2-4%)
Size(mm): <1.5
SOME ACICULAR CRYSTALS;
OLIVINE ( 2%)
Size(mm): <.5
OL IS SMALL AND ALTERED;
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1380 Analyst: Flower, M.
Hole: 483B Sample Midpoint (m) : 205.38
Core: 19 Top of Core Depth (m) : 204.00
Sect: 1 Top of Section Depth(m): 204.00
LITHOLOGY: PLAG-OL SPARSELY-MOD PHYRIC BASALT;
Piece No. : PCES 1 (0-13), 2 (14-21), 3 (23-30), 4 (31-37),
5 (38-46), 6 (49-53), 7 (55-64), 8 (65-80),
9 (81-87), 10 (90-95), 11 (95-105), 12A (107-119),
12B (119-129), 13 (130-138);
Texture : SPARELY-MOD PHYRIC, OPYHITIC CPX IN GLOMEROCRYSTIC
CLOTS WITH PLAG GIVING OPHIMOTTLED TEXTURE
ESPECIALLY PCES(1-7), PCES(8-9) ARE SLIGHTLY FINER-
GRAINED(GLASSY?), ROCKS ARE OTHERWISE FINE TO
MEDIUM-GRAINED;
Structure : FINE SMECTITE-FILLED HAIRLINE CRACKS ON FRACTURE
COATINGS PCES(5,8,9,10,13);
Alteration : FRESH TO SLIGHT
PCES(12A-B) ARE FRESH, BUT PCES(12B,13) HAVE
DIFFUSE HALOS 5M THICK, PCES(8.9) ARE MORE
PERVASIVELY ALTERED;
Comments : CONTINUOUS FROM 18-3 BUT FRESHER AND LESS VESICULAR,
POSSIBLE BREAK AT PCES(8,9);
Vesicles : Size(mm): <.2 Percent: <1
Location: Filling: CARB
RARE CARB-FILLED VESICLES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): 1
OLIVINE ( 1%)
Size(mm): <.5
NO OL SEEN IN PCES(9-13), PCES(1-7) ALL OL ALTERED
TO SERPENTINE(?);
Replacement: SMECTITE
CARBONATE
SERPENTINITE
ID SERPENTINE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 830 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 206.33
Core: 19 Top of Core Depth (m) : 204.00
Sect: 2 Top of Section Depth(m): 205.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-30), 1B (30-41), 1C (41-50), 2 (51-63),
3 (65-76), 4 (78-83);
Texture : PCES(1-3) ARE MEDIUM-GRAINED, SPARSELY PHYRIC,
Structure : MASSIVE;
Comments : GREY, POSSIBLY 2 UNITS WITH BREAK BETWEEN PCES(3,4)
OR PCE 5;
Vesicles : Size(mm): Percent: TO 1
Location: Filling: SMEC
Phenocrysts: ( 1%)
Size(mm): <3
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 790/1450 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 206.95
Core: 19 Top of Core Depth (m) : 204.00
Sect: 2 Top of Section Depth(m): 206.29
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 4 (79-83), 5 (85-93), 6A (95-105),
6B (105-115), 6C (114-130), 7A (131-137),
7B (137-145);
Texture : PCES(6,7) ARE FINE-GRAINED AND SPARSELY PHYRIC,
PLAG-OL GLOMEROPHYRIC CLOTS;
Structure : MASSIVE, VEINS OF CALCITE AND SMEC AND MINOR PYRITE;
Comments : DARK, TWO UNITS WITH BREAK BETWEEN PCES(3,4) OR 5;
Phenocrysts: COMBINATION ( 2%)
Size(mm): TO3
COMBINE INCLUDES PLAG AND OL, OL MOSTLY ALTERED TO
SMEC-OCCURS IN GLOMEROPHYRIC CLOTS(1:3) WITH PLAG;
Replacement: CALCITE
SMECTITE
PYRITE
MINOR;
Leg : 65 Top/Bottom Interval(mm): 0/1180 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 208.18
Core: 19 Top of Core Depth (m) : 204.00
Sect: 3 Top of Section Depth(m): 207.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-7), 1B (7-13), 1C (17-41), 2 (44-47),
EA (50-60), 3B (60-63), 3C (64-72), 4A (74-95),
4B (95-118);
Texture : SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED WITH
INCREASING GRAIN SIZE FROM PCES(1-4), SOME PLAG-OL
GLOMEROCRYSTS;
Structure : MASSIVE, VEINS OF CALCITE AND SMEC;
Alteration : SLIGHT
NO ALTERATION HALOS BUT PCES(1A-B) SHOW SOME
PERVASIVE ALTERATION;
Comments : COULD BE COMBINATION OF PCE 19-2;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: COMBINATION ( 2-3%)
INCLUDES PLAG-OL OCCURRING BOTH AS GLOMEROCRYSTS
WITH EACH OTHER AND MORE COMMONLY AS SINGLE
CRYSTALS, OL UP TO 3 OR 4MM INCREASES IN ABUNDANCE
TOWARDS PCE (4), SOME FRESH OL IN PCE(4) OTHERS
REPLACED BY SERP(?) AND/OR CARBONATE;
CLINOPYROXENE ( TR%)
TRACE MINOR CPX IN GLOMEROCRYSTS;
Replacement: CARBONATE
SERPENTINITE
ID SERPENTINE QUESTIONABLE;
SMECTITE
SULFIDE ( 0%)
Leg : 65 Top/Bottom Interval(mm): 0/1420 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 209.92
Core: 20 Top of Core Depth (m) : 208.50
Sect: 1 Top of Section Depth(m): 208.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-20), 1B (20-30), 1C (30-56), 1D (56-91),
1E (89-100), 1F (101-128), 2 (130-141);
Texture : SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED, PLAG-CPX
GLOMEROCRYSTS;
Structure : MASSIVE, FRACTURES ARE MODERATE AND MOSTLY
SUBHORIZONTAL AND SUBVERTICAL WITH MANY FILLED IN
1-2MM THICK VEINLETS WITH CARB AND SMEC AND RARE
SULFIDE, SOME SLICKENSIDES;
Alteration : MOD
SOME ALTERATION HALOS;
Comments : SECTION CONTINUING FROM 19-3 AND PRACTICALLY
FORMING ONE CONTINUOUS PCE;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC
SMECTITE IS GREEN;
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): <.4
OLIVINE ( 1%)
Size(mm): <.3
OL MOSTLY ALTERED TO GREEN LAYER SILICATE AND SOME
CARB ALTHOUGH THERE IS SOME FRESH OL;
CLINOPYROXENE
VERY RARE IN GLOMEROCRYSTS WITH PLAG;
Replacement: SMECTITE
CARBONATE
SILICATE
SULFIDE
Leg : 65 Top/Bottom Interval(mm): 0/ 660 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 210.66
Core: 20 Top of Core Depth (m) : 208.50
Sect: 2 Top of Section Depth(m): 210.00
LITHOLOGY: PLAG-OL-CPX SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (0-15), 2 (16-44), 3 (46-48) 4 (50-61),
5 (63-66);
Texture : SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED WITH GRAIN
SIZE DECREASING MARKEDLY IN PCE(2) TO A 2MM GLASSY
MARGIN IN PCE(5) FOLLOWED UPWARD BY A THIN
VARIOLOTIC ZONE;
Structure : MASSIVE, MINOR FRACTURES EXCEPT IN PCE(1), CALCITE-
SMECTITE VEINS IN PCE(1);
Comments : SECTION CONTINUING FROM 20-1, PCE(5) HAS 2-3MM FINE
TO MEDIUM-GRAINED GREEN SANDSTONE LAYER BEDDED;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC
ID GREEN SMEC UNCERTAIN;
Phenocrysts: COMBINATION ( <2-5%)
Size(mm): TO 6
INCLUDES PHENOS OF PLAG>OL>>RARE CPX SLIGHTLY
LARGER AND MORE ABUNDANT(TO 4-5%) IN PCES(1,TOP OF
( HILE%)
Size(mm): MOST OF PC
Replacement: SMECTITE
ID SMEC UNCERTAIN;
CALCITE
Leg : 65 Top/Bottom Interval(mm): 700/1300 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 211.30
Core: 20 Top of Core Depth (m) : 208.50
Sect: 2 Top of Section Depth(m): 210.70
LITHOLOGY: SEDIMENT;
Piece No. : PCES 6 (67-70), 7 (71-94), 8 (95-130);
Comments : BROWN MUDSTONE STRONGLY INDURATED IN PCES(6,8);
Leg : 65 Top/Bottom Interval(mm): 1300/1480 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 211.48
Core: 20 Top of Core Depth (m) : 208.50
Sect: 2 Top of Section Depth(m): 211.30
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 9 (131-134), 10 (136-140), 11 (142-148);
Texture : SPARSELY PHYRIC, FINE-GRAINED, PCE 9 HAS CA. 5MM
GREENISH GLASSY (DEVITRIFIED) AND VARIOLITIC RIND
ENCLOSING THIN PCE OF HARD(POSSIBLY BAKED) MUDSTONE,
THIS COOLING UNIT IS LESS PHYRIC WITH SMALLER PHENOS
THAN UPPER THICK COOLING UNIT;
Structure : MINOR FRACTURES;
Alteration : SLIGHT
PROBABLY MUCH ALTERED GLASS IN GROUNDMASS OF
PCES(10,11);
Comments : TOP OF NEW COOLING UNIT, THICKER(.8CM) CURVED ZONE
IN PCE 11 INDICATES THAT TOP MARGIN OF COOLING UNIT
IS IRREGULAR;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC
ID GREEN SMEC UNCERTAIN;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): <2
OLIVINE ( <1%)
Size(mm): <1
OL ALTERED TO CARB AND SMEC;
Replacement: SULFIDE
RARE;
CALCITE
SMECTITE
ID SMEC UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 280 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 211.78
Core: 20 Top of Core Depth (m) : 208.50
Sect: 3 Top of Section Depth(m): 211.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PACES 1 (0-17), 2 (19-28);
Texture : SPARSELY PHYRIC, FINE-GRAINED WITH POSSIBLE DECREASE
IN GRAIN SIZE TOWARDS BASE OF CORE;
Structure : MASSIVE, ONE CALCITE-SMECTITE VEIN IN PCE 2;
Alteration : SLIGHT
SLIGHTLY MORE ALTERED THAN BASE OF CORE 20-2;
Comments : CONTINUATION OF CORE 20-2;
Vesicles : Size(mm): <1 Percent: <1
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): <3
OLIVINE ( TO 1%)
OL REPLACED BY CARB AND SMEC;
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/ 950 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 213.95
Core: 21 Top of Core Depth (m) : 213.00
Sect: 1 Top of Section Depth(m): 213.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (0-5), 2 (7-13), 3A (15-25), 3B (25-46),
3C (46-53), 3D (52-64), 3E (64-72), 3F (73-82),
3G (81-85), 4 (87-93);
Texture : SPARELY PHYRIC, VERY FINE-GRAINED TO FINE-GRAINED;
Structure : FRACTURES FILLED WITH CARB & SMEC & TRACE PYRITE;
Alteration : MOD
Comments : GREY;
Vesicles :
Location: Filling: SMEC
VESICLES ARE UNEVENLY DISTRIBUTED WITH MOST OF
THEM AT TOP OF CORE PCES(1,2), SOMETIMES INNER
VESICLE WALL RIMMED WITH DARK MATERIAL(GLASS?);
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): TO 2
OLIVINE
FEW TRACE PHENOS WHICH ARE COMPLETELY REPLACED BY
GREENISH SECONDARY MINERALS-SMECTITE(?) WHICH MAY
HAVE BEEN OLIVINE;
Replacement: CARBONATE
SMECTITE
PYRITE
TRACE;
Leg : 65 Top/Bottom Interval(mm): 950/1480 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 214.48
Core: 21 Top of Core Depth (m) : 213.00
Sect: 1 Top of Section Depth(m): 213.95
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCES 5A (96-103), 5B (104-111), 5C (110-115),
6 (119-130), 7A (130-144), 7B (139-148);
Texture : MOD PHYRIC, FINE-GRAINED, SOME GLOMEROPHYRIC
AGGREGATES OF PLAG-CPX-OL, PARTLY ALTERED GLASS
BETWEEN TWO COOLING UNITS;
Structure : FRACTURES FILLED WITH CARB & SMEC & TRACE PYRITE;
Alteration : SLIGHTLY
GLASS BETWEEN TWO COOLING UNITS PARTLY ALTERED TO
PALAGONITE AND REPLACED BY SMEC AND CARB;
Comments : GREY, TWO COOLING UNITS;
Vesicles : Size(mm): 0.5-1 Percent: 1
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): TO 3
OLIVINE ( <1%)
Size(mm): 1-2
CLINOPYROXENE ( <1%)
Size(mm): 1-2
PART OF OL-CPX PHENOS REPLACED BY SMEC, SOME
GLOMEROPHYRIC AGGREGATES OF PLAG-OL-CPX;
Replacement: CARBONATE
SMECTITE
PYRITE ( TR%)
PALAGONITE
Leg : 65 Top/Bottom Interval(mm): 0/1410 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 215.91
Core: 21 Top of Core Depth (m) : 213.00
Sect: 2 Top of Section Depth(m): 214.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCES 1A (1-7), 1B (8-16), 2A (18-28), 2B (29-36),
2C (36-42), 2D (43-47), 3A (50-52), 3B (52-56),
3C (55-61), 4A (63-69), 4B (69-74), 4C (74-78),
4D (80-85), 5 (87-93), 6 (95-105), 7 (101-115),
8 (119-123), 9 (126-131), 10A (133-138),
10B (138-141);
Texture : MOD PHYRIC, FROM VERY FINE-GRAINED WITH GLASSY
MARGIN TO FINE TO MEDIUM-GRAINED, SOME GLOMEROPHYRIC
AGGREGATES FILLED WITH SMEC & CARB & RARR PYRITE;
Structure : FRACTURES FILLED WITH SMEC & CARB & RARE PYRITE;
Alteration : SLIGHT TO MOD
MODERATE ALTERATION NEAR GLASSY MARGIN AND
FRACTURES, GLASS PARTLY ALTERED TO PALAGONITE;
Comments : GREY, THERE ARE FOUR COOLING UNITS(OR SEPARATE
PILLOWS): THE FIRST IS FROM PCES(1-2A), SECOND IS
PCES(2B-3C) AND THE THIRD IS PCES(4A-5) AND THE LAST
ONE IS PCES(6-10B), ALL SAMPLES HAVE THE SAME
PETROGRAPHICAL COMPOSITION;
Vesicles :
Location: Filling: SMEC
VESICLES ARE UNEVENELY DISTRIBUTED AND SOME ARE
FILLED WITH SMEC;
Phenocrysts: PLAGIOCLASE ( TO 5%)
Size(mm): 1.5-2
SOME RARE PLAG PHENOS UP TO 5MM;
COMBINATION ( 1%)
Size(mm): TO 2
INCLUDES OL-CPX PHENOS, DOMINANT PHENOS ARE FRESH
BUT SOME ARE REPLACED BY SECONDARY MINERALS(SMEC &
CARB);
Replacement: SMECTITE
Minerals Replaced: OL,CPX
PYRITE ( TR%)
PALAGONITE
Minerals Replaced: GLASS
CARBONATE
Minerals Replaced: OL,CPX
Leg : 65 Top/Bottom Interval(mm): 0/1470 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 218.97
Core: 22 Top of Core Depth (m) : 217.50
Sect: 1 Top of Section Depth(m): 217.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCES 1 (2-12), 2 (8-20), 3A (27-32), 3B (33-42),
3C (44-49), 4A (50-56), 4 B (57-61), 4C (60-70),
4D (70-78), 4E (77-84), 5 (85-90), 6 (92-102),
7A (104-110), 7B (110-117), 7C (117-125),
7D (125-131), 7E (131-139), 7F (140-147);
Texture : PHYRIC, FINE-GRAINED, GLASSY MARGINS 1-2CM EXPANDED
DUE TO CLAY AND ZEOLITE BETWEEN WEDGED APART AND
PARTLY ALTERED GLASS PCES(5,3A,6), ALSO CURVED AND
STEEPLY INCLINED GLASS RINDS COMMON, CLOTS OF PLAG-
OL-CPX, THE UPPER COOLING UNITS PCES(1-6) ARE MORE
PHYRIC THAN THE LOWER COOLING UNITS(REST OF CORE)
WITH THE UPPER UNITS HAVING 5-10% DOWN TO 5% PHENOS
AND THE LOWER UNITS CONTAINING <5%;
Structure : PILLOW BASALT, FRACTURES COMMON BUT PCES CAN BE
FITTED TOGETHER, SMECTITE VEINS(CA. 1MM WIDE) BUT
NOT COMMON IN PCES (2,3);
Alteration : SLIGHT;
Comments : PORPHYRITIC PILLOW BASALT, THE UPPER COOLING UNITS
PCES(1-6) ARE MORE PHYRIC THAN THE LOWER COOLING
UNITS;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: SMEC, CARB
Shape : ROUND TO
Location: Filling:
Shape : IRREGULAR
Phenocrysts: PLAGIOCLASE ( <2%)
PLAG IS MOST ABUNDANT PHENO, RARE PHENOS UP TO
6MM;
OLIVINE ( 1-3%)
CLINOPYROXENE ( TO 1%)
GREEN TRANSLUCENT, MOSTLY IN PLAG-OL-CPX CLOTS;
Replacement: SMECTITE
Minerals Replaced: OL
ZEOLITE
SOME ZEOLITE COULD BE EXCELLENT PHILLIPSITE(?);
CARBONATE
MINOR;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 220.50
Core: 22 Top of Core Depth (m) : 217.50
Sect: 2 Top of Section Depth(m): 219.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCES 1A (1-15), 1B (15-27), 1C (29-41), 2A (42-50),
2B (50-61), 2C (61-65), 2D (65-74), 2E (75-84),
3 (86-91), 4 (92-98), 5 (100-110), 6 (112-128),
7 (120-126), 8 (127-135), 9 (136-144), 10 (145-150);
Texture : PHYRIC, FINE-GRAINED, GLOMEROCRYSTS OF PLAG-OL-CPX,
ABUNDANT FRESH GLASS;
Structure : PILLOW BASALT, FRACTURES ABUNDANT AND IRREGULAR IN
LOWER PART OF SECTION;
Alteration : FRESH-MOD
PCES(1A-1B,2C-2E) SHOW MORE ALTERATION;
Comments : FOUR COOLING UNITS(#'S 1(1A-1C), 2(2A-2E), 3(3-6) &
4(7-10), THE UPPER ONE CONTINUING FROM 22-1 AND THE
LOWER CONTINUING INTO 22-3;
Vesicles : PCES(1A-1B,2B-2E) HAVE SUBVERTICAL CAVERNOUS ZONES
WITH DARK GREEN BOTRYOIDAL SMEC(?) AND MANGANESE
CRUSTS(??);
Phenocrysts: COMBINATION ( 10%)
INCLUDES PLAG>OL>CPX PHENOS WITH PHENOS MOSTLY IN
GLOMEROCRYST;
Replacement: SMECTITE
ID BOTRYOIDAL SMEC UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/0110 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 220.61
Core: 22 Top of Core Depth (m) : 217.50
Sect: 3 Top of Section Depth(m): 220.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCES 1A (1-7), 1B (7-11);
Texture : VERY FINE-GRAINED(NEAR GLASSY MARGIN) TO FINE-
GRAINED, MODERATELY PHYRIC;
Alteration : FRESH;
Comments : DARK GREY, BOTTOM OF LAST COOLING UNIT OF SECTION
22-2;
Vesicles : VESICLES ARE FEW AND SMALL;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): 1.5-2
COMBINATION ( <1%)
Size(mm): TO1.5
INCLUDES OL AND CPX;
Leg : 65 Top/Bottom Interval(mm): 0/ 240 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 222.24
Core: 23 Top of Core Depth (m) : 222.00
Sect: 1 Top of Section Depth(m): 222.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCES 1A (0-15), 1B (15-24);
Texture : PHYRIC, FINE-GRAINED, PLAG-OL WITH MINOR CPX
GLOMEROPHYRIC AGGREGATES;
Structure : PILLOW BASALT;
Alteration : FRESH;
Comments : SIMILAR TO PCE 1 CORE 22-3;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <2
TINY PLAG LATHS AND GLOMEROPHYRIC AGGREGATES OF
PLAG & OL WITH MINOR CPX;
OLIVINE
SOME FRESH OL;
CLINOPYROXENE ( TR%)
Leg : 65 Top/Bottom Interval(mm): 250/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 223.50
Core: 23 Top of Core Depth (m) : 222.00
Sect: 1 Top of Section Depth(m): 222.25
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCES 2 (26-45), 3A (48-59), 3B (59-63), 3C (64-68),
4A (70-80), 4B (80-85), 4C (83-88), 5 (91-102),
6 (104-110), 7A (113-122), 7B (123-131),
7C (131-140), 7D (140-145), 7E (145-150);
Texture : MEDIUM-GRAINED, FRESH GLASS IS PRESENT BUT IN PLACES
THE GLASS IS ALTERED TO SMEC(?), GLASSY MARGIN,
GLOMEROPHYRIC AGGREGATES OF PLAG-OL-CPX INCLUSIVE;
Structure : PILLOW BASALT, VEINING OF GLASS OCCURS PARALLEL TO
GLASSY MARGIN, ROCK FRACTURED AND VEINED WITH
CALCITE AND SMECTITE;
Comments : COOLING UNITS(#'S 1(2-3C), 2(4A-4B), 3(4C-6),
4(7A-?));
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC
Shape : ROUNDED
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): TO 10
LARGE PLAG LATHS UP TO 10MM AND GLOMEROPHYRIC
AGGREGATES OF PLAG-OL AND MINOR CPX;
OLIVINE
OL IS FRESH AND MORE ABUNDANT THAN IN PCES(1A-1B),
MAKES UP TO 30% OF PHENOS;
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 225.00
Core: 23 Top of Core Depth (m) : 222.00
Sect: 2 Top of Section Depth(m): 223.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCES 1 (0-17), 2 (18-30), 3 (32-40), 4 (42-45),
5A (47-56), 5B (56-70), 5C (70-74), 6 (76-83),
7 (85-95), 8 (97-108), 9 (110-116), 10 (119-126),
11 (126-132), 12 (133-144), 13 (145-150);
Texture : PHYRIC, DARK GREEN SOFT BLEBS OF SERPENTINE(?) OCCUR
SINGLY(1MM), FRESH OL IN GLOMEROPHYRIC CONTACT WITH
PLAG;
Structure : PILLOW BASALT, VEINS CONTAIN SMEC AND CALCITE BUT
SOME VEINS EITHER SMEC OR CALCITE;
Comments : PILLOW BASALT SIMILAR TO 23-1, PCES(1-3) ARE SIMILAR
AND PROBABLY CONTINUOUS WITH PCE 7 FROM 23-1;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: SMEC
Phenocrysts: COMBINATION ( 10-1%)
Size(mm): 5 1
INCLUDES PLAG-OL PHENOS WITH SOME FRESH OL
IN GLOMEROPHYRIC CONTACT WITH PLAG;
Replacement: SERPENTINITE
ID SERPENTINE UNCERTAIN;
SMECTITE
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1480 Analyst: Flower, M.
Hole: 483B Sample Midpoint (m) : 226.48
Core: 23 Top of Core Depth (m) : 222.00
Sect: 3 Top of Section Depth(m): 225.00
LITHOLOGY: PLAG-OL MOD PHYRIC TO PHYRIC BASALT;
Piece No. : PCES 1 (0-15), 2 (16-26), 3 (17-39), 4 (41-50),
5 (52-58), 6 (92-96), 7 (68-73), 8A (76-83),
8B (85-89), 9(92-96), 10A (98-106), 10B (106-111),
11A (112-121), 11B (121-127), 12 (130-136),
13 (139-148);
Texture : MOD PHYRIC TO PHYRIC, PHENOS OCCUR IN GLOMEROPHYRIC
CLOTS SOMETIMES WITH CPX(?)-RARE, GLASS OCCURS IN
PCES(8B,9.10-WITH PCE 10B HAVING GLASS UNDIVIDED OF
PCE) FRESH AND MOSTLY UNDEVITRIFIED;
Structure : FINE HAIRLINE CRACKS FILLED MOSTLY WITH CALCITE AND
OCCASIONAL SMECTITE COATINGS ON FRACTURE SURFACES,
SMECTITE VEIN IN PCE 8B;
Alteration : VERY FRESH;
Comments : PCES(1-8) CONTINUOUS COOLING UNIT FROM 23-2;
Vesicles : Size(mm): Percent: 0
ROCK IS UNVESICULAR;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): 2-10
OLIVINE ( 2-3%)
Size(mm): <1
OL IS MOSTLY FRESH, SOME GLOMEROPHYRIC CLOTS WITH
PLAG-OL AND MAYBE CPX(?)-RARE;
Replacement: SMECTITE
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/ 740 Analyst: Flower, M.
Hole: 483B Sample Midpoint (m) : 227.24
Core: 23 Top of Core Depth (m) : 222.00
Sect: 4 Top of Section Depth(m): 226.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCES 1 (0-4), 2 (7-11), 3 (13-24), 4 (26-35),
5 (37-38), 6 (41-49), 7 (50-53), 8 (56-58),
9A (62-70), 9B (70-74);
Texture : MOD PHYRIC BUT PCES(5-9) ARE LESS PHYRIC THAN PCES
(1-4);
Structure : CARB AND SMEC ALONG VEIN;
Alteration : FRESH
GROUNDMASS COMPARATIVELY FRESH;
Comments : LITHOLOGY CONTINUOUS FROM 23-3, PCES(5-9) ARE
BEGINNING OF NEW COOLING UNIT;
Phenocrysts: PLAGIOCLASE ( 10%)
OLIVINE ( 3%)
OL PHENOS ARE FRESH;
CLINOPYROXENE ( 1%)
PCES(1-4) ARE MORE PHYRIC THAN REST OF CORE;
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 228.00
Core: 24 Top of Core Depth (m) : 226.50
Sect: 1 Top of Section Depth(m): 226.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-5), 2 (7-10), 3 (12-17), 4 (20-29),
5 (32-35), 6A (37-68), 6B (39-48), 6C (50-65),
7A (57-62), 7B (61-72), 7C (72-79), 8 (81-87),
9 (90-93), 10 (96-103), 11 (104-107), 12 (111-115),
13 (119-122), 14A (125-131) 14B (132-137),
14C (138-145), 15 (148-150);
Texture : SPARSELY PHYRIC, FINE-GRAINED, POSSIBLE CHILLED
MARGIN IN BOTTOM OF PCES(14C,10,4), FRESH GLASS AND
ALTERED GLASS AND CHILLED MARGINS COMMON;
Structure : PILLOW BASALT, VEINS FILLED WITH CALCITE & SMECTITE
AND OCCASIONAL PYRITE;
Alteration : FRESH
PCE 13 HAS EXTENSIVELY ALTERED AREAS WHICH ARE NOW
VUGS;
Vesicles : VUGS FILLED WITH CALCITE AND SMEC(GLOBULAR);
Phenocrysts: PLAGIOCLASE ( <1%)
OLIVINE ( <1%)
PLAG-OL PHENOS AND GLOMEROCRYSTS, OL IS FRESH;
Replacement: CALCITE
SMECTITE
PYRITE
OCCASIONAL PYRITE;
Leg : 65 Top/Bottom Interval(mm): 0/ 700 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 228.70
Core: 24 Top of Core Depth (m) : 226.50
Sect: 2 Top of Section Depth(m): 228.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 1A (06), 1B (6-17), 2 (20-26), 3 (28-35),
4 (37-43), 5 (45-61), 6 (63-70);
Texture : SPARSELY PHYRIC, FINE-GRAINED, PLAG-OL-CPX
GLOMEROCRYSTS;
Structure : VEINS FILLED WITH SMECTITE AND SULFIDES;
Alteration : SLIGHT
SOME ALTERATION HALOES WITH GROUNDMASS SULFIDES,
ALSO GREEN SMECTIE/SERPENTINE IN DIFFUSE
ALTERATION HALOES;
Comments : SIMILAR TO END 24-1, NO COOLING MARGINS SEEN EXCEPT
AT TOP OF PCE 1;
Vesicles : Size(mm): 0.5 Percent: <1
Size(mm): 0.5 Percent: <1
Location: Filling: CALCITE,SMECTITE
Phenocrysts: COMBINATION ( <3%)
INCLUDES PLAG-OL PHENOS BOTH AS ISOLATED CRYSTALS
AND AS GLOMEROCRYSTS, SOME OL IS FRESH, PCE 5 HAS
POSSIBLY ALTERED PHENOS OF SERPENTINE(?) 6MM LONG
AND BADLY ALTERED;
Groundmass : SULFIDES
Replacement: SMECTITE
SMEC IS DARK TO LIGHT GREEN;
CALCITE
SULFIDES
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 232.50
Core: 25 Top of Core Depth (m) : 231.00
Sect: 1 Top of Section Depth(m): 231.00
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
Piece No. : PCES 1 (0-10), 2A (12-22), 2B (20-34), 2C (35-42),
2D (43-51), 2E (50-60), 3 (62-67), 4 (70-77),
5A (78-85), 5B (84-102), 6A (103-121), 6B (120-132),
6C (130-143), 6D (143-150);
Texture : FINE TO MEDIUM-GRAINED, SPARSELY PHYRIC, PCE 6D HAS
CHILLED MARGIN, FEW PLAG-OL-MINOR CPX GLOMEROCRYSTS,
POIKILITIC SPINELS;
Structure : VEINS-SMECTITE AND CALCITE AND SULFIDES-HAIRLIKE
SOME DISCONTINUOUS, PCE(58) HAS 2-3MM WIDE SMECTITE
MASSIVE;
Alteration : SLIGHT
DIFFUSE ALTERATION HALOES 3-4MM WIDE AROUND
HAIRLIKE VEINS;
Comments : APPEARS CONTINUOUS OF UNIT IN 24-2, CHILLED MARGIN
CONTINUES INTO 25-2 PCE 1;
Vesicles : Size(mm): 0.5 Percent: <<1
Location: Filling: SMECTITE
Phenocrysts: COMBINATION ( <3%)
Size(mm): 3-4
INCLUDES PLAG-OL PHENOS AND SOME GLOMEROCRYSTS
WITH MINOR CPX, OL PARTLY ALTERED AND REPLACED BY
SERPENTINE(?) AND OCCASIONAL CALCITE, SOME FRESH
OL(2MM) PARTICULARLY IN GLOMEROCRYSTS;
Replacement: SERPENTINITE
ID SERPENTINE UNCERTAIN;
CALCITE
SMECTITE
SULFIDES
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 234.00
Core: 25 Top of Core Depth (m) : 231.00
Sect: 2 Top of Section Depth(m): 232.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1 (1-4), 3 (22-33), 4A (35-47), 4B (48-55),
4C (54-72), 4D (72-75), 4E (75-81), 5 (82-93),
6 (94-100), 7 (103-107), 8 (110-118), 9 (120-128),
10 (130-134), 11 (137-142), 12 (145-150);
Texture : PCES(1,3) HAVE CHILLED MARGINS, MOD PHYRIC;
Structure : VEINS FILLED WITH CALCITE AND DARK GREEN SOFT
MINERALS(SERPENTINE ?) ALSO MINOR SULFIDE,
PCES(4D-E) HAVE A SLICKENSIDED(?) TYPE VEIN;
Alteration : MOD
ALTERATION HALOS AROUND VEINS;
Comments : PCE 1 PROBABLY BELONGS TO 25-1, BEDDING IN SEDIMENT
MAY BE AT AN ANGLE OF CA. 20-30 DEGREES TO DRILL
CORE;
Vesicles : Size(mm): <1-3 Percent: 3-5
Location: Filling: SULFIDE,CALCITE
Shape : ROUND
Location: Filling: SMECTITE,SERP
LARGE VESICLES TO 3MM ON TOP;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <5
OLIVINE
OCCASIONAL SINGLE ALTERED OL PHENOS;
Replacement: SERPENTINITE
ID DARK GREEN SOFT MINERAL-SERPENTINE UNCERTAIN;
CALCITE
SULFIDE
SULFIDE IS MINOR;
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 50/ 200 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 232.70
Core: 25 Top of Core Depth (m) : 231.00
Sect: 2 Top of Section Depth(m): 232.55
LITHOLOGY: SEDIMENT;
MUDSTONE;
Piece No. : PCE 2 (5-20);
Leg : 65 Top/Bottom Interval(mm): 0/0170 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 232.67
Core: 25 Top of Core Depth (m) : 231.00
Sect: 2 Top of Section Depth(m): 232.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCES 1 (0-4), 2 (5-17);
Texture : MOD PHYRIC, OCCASIONAL GLOMEROCRYSTS OF PLAG-OL;
Structure : THIN VEINS OF SMECTITE AND CALCITE;
Alteration : FRESH;
Comments : APPEARS TO BE CONTINUATION OF COOLING UNIT IN 25-2
BUT LESS ALTERED;
Vesicles : VESICLES SCARCE;
Phenocrysts: PLAGIOCLASE ( 3-4%)
Size(mm): 2-3
OLIVINE ( 1%)
PLAG-OL GLOMEROCRYSTS;
Replacement: SMECTITE
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 237.00
Core: 26 Top of Core Depth (m) : 235.50
Sect: 1 Top of Section Depth(m): 235.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCES 1 (1-9), 2 (12-14), 3 (16-25), 4 (29-33),
5 (35-37), 6 (41-49), 7 (51-58), 8 (61-66),
9 (68-93), 10A (75-100), 10B (100-106),
11 (108-113), 12 (115-120), 13 (122-130),
14A (132-142), 14B (142-150);
Texture : FINE-GRAINED, MOD PHYRIC, PLAG-PARTLY ALTERED TO
FRESH OL GLOMEROPHYRIC CLOTS, ONE LARGE PLAG WITH
POIKILITIC SPINELS(12MM X 6MM);
Structure : TWO TYPES OF VEINS-ONE IS CALCITE-SMECTITE-SULFIDE &
THE OTHERS ARE SERPENTINE(?) VEINS WITH ALTERATION
HALOS, PCE(11) HAS SMOOTH SERPENTINE(?) TYPE VEIN;
Alteration : FRESH
ALTERATION HALO AROUND SERPENTINE(?) VEIN;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): <2
OLIVINE
MINOR PARTLY ALTERED TO FRESH OL IN GLOMEROPHYRIC
CLOTS WITH PLAG AND ALSO SOME FRESH SINGLE PHENOS
OF OL;
SPINEL
Size(mm): 12 X 6
ONE LARGE PLAG WITH POIKILITIC SPINELS-MEGACRYST
IN 14B;
Replacement: CALCITE
SMECTITE
SULFIDES
SERPENTINITE
ID SERPENTINE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 50 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 237.05
Core: 26 Top of Core Depth (m) : 235.50
Sect: 2 Top of Section Depth(m): 237.00
LITHOLOGY: SEDIMENT;
Piece No. : PCE 1 (0-5);
Leg : 65 Top/Bottom Interval(mm): 50/1500 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 238.50
Core: 26 Top of Core Depth (m) : 235.50
Sect: 2 Top of Section Depth(m): 237.05
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 2 (7-10), 3 (12-23), 4 (25-29), 5 (31-37),
6 (38-41), 7 (43-48), 8 (50-57), 9 (59-61),
10 (63-71), 11 (74-77), 12 (80-85), 13 (87-94),
14 (95-105), 15 (107-116), 15 (117-124),
17A (127-137), 17B (136-144), 17C (144-150);
Texture : PCE 2 HAS CHILLED MARGIN, PHYRIC, PCE(12-13) ARE
FINE-GRAINED CHILLED AND ALTERED GLASS, PCE 17 IS
FINE-GRAINED WITH CHILLED MARGINS ALSO GLOMEROCRYSTS
OF PLAG-OL IN BOTH UNITS, PCES(14-17) MOD PHYRIC;
Structure : PCES(5-8,17A-C)HAVE VEINS ADJACENT TO SMALL
INTRUSION AND CONTAIN A NETWORK OF FINE ANASTAMOSING
FRACTURES-SOME DEFINITELY CUT THE INTRUSION OTHERS
MAY PRECEDE IT, VEINS FILLED WITH SERPENTINE-LIKE
MATERIALS AND SMECTITE, VEIN AT END OF 17A APPEARS
CONTAIN FINE-GRAINED CHILLED MATERIAL IN ADDITION TO
SECONDARY MINERALS-MAY BE PART OF INTRUSION MARGIN,
PCE 17 HAS DIKE OF INTRUSION;
Alteration : SLIGHT;
Comments : PCES(14-17) MAY BE NEW COOLING UNIT BUT NO SIGNS OF
UPPER CHILL ON PCE(14), CLOSE UP PHOTOS OF FRACTURES
IN PCES(5-8) AND OF INTRUSION PCES(17A-C);
Vesicles : Size(mm): 1-.5 Percent:
Location: Filling: SMEC,CALCITE
VESICLES SHOW SOME PERVASIVE ALTERATION-PCES
(14-17);
Phenocrysts: COMBINATION ( <3%)
Size(mm): TO 3
INCLUDES PLAG-OL IN SINGLE CRYSTALS AND ALSO IN
GLOMEROCRYSTS, OL ALTERED TO SERPENTINE(& CALCITE
RARELY), PCES(14-17) HAVE <5% PLAG-OL PHENOS ALSO
GLOMEROCRYSTS OF PLAG-OL(NOW SERPENTINE);
Replacement: SERPENTINITE
SMECTITE
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 241.50
Core: 27 Top of Core Depth (m) : 240.00
Sect: 1 Top of Section Depth(m): 240.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (0-6), 2 (7-18), 3 (19-23), 4A (25-38),
4B (38-42), 5 (44-52), 6A (54-63), 6B (62-72),
6C (73-83), 6D (83-104), 6E (103-119), 6F (119-13),
6G (129-132), 7 (147-150);
Texture : SPARSELY PHYRIC, OCCASIONAL GLOMEROCRYSTS OF PLAG-
OL-CPX(?);
Structure : MASSIVE, VEINS-PCES(2-4) WITH DARK GREEN SMECTITE &
SULFIDES(?), PCE 6 HAS HAIRLIKE DISCONTINUOUS VEINS
OF SMEC-CALCITE AND A WIDER VEIN OF SMEC & CALCITE,
SULFIDES IN PCE(6B);
Alteration : SLIGHT
SOME PERVASIVE ALTERATION IN PCES(2-6B);
Comments : ORIENTATION OF PCE 4 IS UNCERTAIN;
Vesicles : Size(mm): 0.5-1.5 Percent: <1-2
Location: Filling: SMEC, CALCITE
Location: Filling: SERP, SULFIDES
VESICLES DECREASE IN ABUNDANCE FROM PCE(2) THRU
PCE(6), VESICLES ARE ADJACENT TO VEINS AND FILLED
WITH DARK GREEN SMEC/SERPENTINE(?) AND RARELY
SULFIDES WHILE OTHERS ARE FILLED WITH LIGHT GREEN
SMECTITE AND OCCASIONALLY CALCITE;
Phenocrysts: PLAGIOCLASE ( 2-3%)
PLAG PHENOS AVERAGE 2-3MM WITH ONE CTRYSTAL IN
PCE (6F) TO 6MM;
OLIVINE
Size(mm): 1-2
RARE OL PHENOS NOW CALCITE AND SMECTITE, SOME
OCCASIONAL GLOMEROCRYSTS OF PLAG-OL-CPX(?);
CLINOPYROXENE
GLOMEROCRYSTS WITH CPX ARE UNCERTAIN;
Replacement: SMECTITE
LIGHT TO DARK GREEN SMECTITE;
CALCITE
SULFIDES
SERPENTINITE
ID SERPENTINE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/1440 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 242.94
Core: 27 Top of Core Depth (m) : 240.00
Sect: 2 Top of Section Depth(m): 241.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-5), 2A (7-22), 2B (22-32), 2C (34-46),
2D (42-61), 2E (61-72), 2F (72-88), 2G (88-102),
2H (103-120), 2I (120-129), 2J (129-144);
Texture : VERY SPARSELY PHYRIC, MEDIUM-GRAINED;
Structure : MASSIVE, VERY REGULAR HORIZONTAL FRACTURES;
Alteration : FRESH;
Comments : BASALT CONTINUING FROM CORE 27-1;
Vesicles : Size(mm): Percent: <1
Phenocrysts: PLAGIOCLASE ( <1%)
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 244.50
Core: 27 Top of Core Depth (m) : 240.00
Sect: 3 Top of Section Depth(m): 243.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-12), 1B (12-26), 1C (26-41), 1D (41-50),
1E (51-65), 1F (65-75), 1G (76-81), 1H (83-90),
1I (90-96), 1J (96-106), 1K (106-115), 1L (116-129),
1M (129-143), 1N (144-150);
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED, NEARLY
HOLOCRYSTALLINE;
Structure : MASSIVE, VERY NEARLY HORIZONTAL FRACTURES WITH SMEC
ALONG OBLIQUE OR HORIZONTAL FRACTURES PCES(1E-F, AND
1I-L) ACCOMPANIED BY MINOR CARBONATE AND FIBROUS
ZEOLITE(/) PCES(1I-K);
Alteration : FRESH;
Comments : CONTINUING UNIT FROM 27-1 BUT COARSER-GRAINED;
Vesicles : Size(mm): Percent: <1
Phenocrysts: PLAGIOCLASE ( <1%)
Replacement: SMECTITE
CARBONATE
ZEOLITE
ID FIBROUS ZEOLITE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 800 Analyst: Schmincke, H.
Hole: 483B Sample Midpoint (m) : 245.30
Core: 27 Top of Core Depth (m) : 240.00
Sect: 4 Top of Section Depth(m): 244.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-5), 1B (5-11), 1C (11-25), 1D (25-32),
1E (33-40), 1F (46-61), 1G (62-80);
Texture : MEDIUM-GRAINED, NEARLY HOLOCRYSTALLINE, PRACTICALLY
APHYRIC WITH << 1% PLAG PHENOS;
Structure : HARILINE FRACTURES-SUBVERTICAL TO SUBHOIZONTAL AND
FILLED WITH SMEC AND MINOR CALCITE AS ABUNDANT AS IN
LOWER HALF OF 27-3, MASSIVE;
Alteration : FRESH;
Comments : CONTINUING FROM CORE 27-3;
Phenocrysts: PLAGIOCLASE ( <<1%)
Size(mm): <4
Replacement: SMECTITE
CALCITE
MINOR;
Leg : 65 Top/Bottom Interval(mm): 0/1280 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 245.78
Core: 28 Top of Core Depth (m) : 244.50
Sect: 1 Top of Section Depth(m): 244.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-8), 2A (10-12), 2B (13-16), 3 (17-22),
4A (24-58), 4B (59-72), 4C (78-101), 4D (102-106),
4E (105-128);
Texture : MEDIUM-GRAINED, SPARSELY PHYRIC;
Structure : MASSIVE, FRACTURES ARE FEW AND THIN AND FILLED WITH
SMEC AND CARB;
Alteration : FRESH;
Comments : GREY;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC
VESICLES ARE FEW & SMALL AND UNEVENLY DISTRIBUTED;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 1-2
RARE PLAG PHENOS TO 3MM;
OLIVINE
SOME OL PHENOS (PCE 4C) ARE COMPLETELY REPLACED BY
SECONDARY MINERALS(SMECTITE);
Replacement: SMECTITE
Minerals Replaced: OL
ID OF SMEC REPLACING OL UNCERTAIN;
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/1470 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 247.47
Core: 28 Top of Core Depth (m) : 244.50
Sect: 2 Top of Section Depth(m): 246.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-47), 1B (48-72), 1C (73-82), 1D (82-90),
1E (110-119), 1F (120-147);
Texture : SPARSELY PHYRIC, FINE-GRAINED
Structure : MASSIVE, FRACTURES FILLED WITH CARB AND SMECTITE AND
ZEOLITE(?), MOD FRACTURED;
Alteration : FRESH TO MOD
ALTERED SLIGHT TO MODERATE NEAR FRACTURES;
Comments : GREY, SAME UNIT AS ABOVE;
Vesicles :
Location: Filling: SMEC
VESICLES ARE FEW & SMALL AND COMPLETELY FILLED
WITH SMECTITE;
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): 1-2
OLIVINE ( <1%)
Size(mm): 1-2
SOME OL ARE FRESH WHILE OTHERS ARE REPLACED BY
SMEC AND CARB AND CLAY;
Replacement: CARBONATE
SMECTITE
ZEOLITE
ID ZEOLITE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 660 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 248.16
Core: 28 Top of Core Depth (m) : 244.50
Sect: 3 Top of Section Depth(m): 247.50
LITHOLOGY: PLAG-OL-PYX SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-21), 1B (20-38), 1C (39-66);
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED;
Structure : FRACTURES FILLED WITH CARB AND SMEC AND ZEOLITE)?),
MASSIVE;
Alteration : FRESH
ROCK IS ALTERED SLIGHTLY AND MODERATELY NEAR
FRACTURES;
Comments : GREY, SAME UNIT AS ABOVE BUT OL CONTENT IS GREATER
THAN ABOVE UNIT;
Phenocrysts: PLAGIOCLASE ( 2-3%)
Size(mm): 1-2
COMBINATION ( 1%)
INCLUDES PHENOS OF OL & PYX SOME OF THEM REPLACED
BY SECONDARY MINERALS(SMEC & CARB & CLAY), SIZE
RARELY 3-5MM;
Replacement: SMECTITE
ZEOLITE
ID ZEOLITE UNCERTAIN;
CARBONATE
CLAY
Leg : 65 Top/Bottom Interval(mm): 0/ 650 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 249.65
Core: 29 Top of Core Depth (m) : 249.00
Sect: 1 Top of Section Depth(m): 249.00
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (2-8), 1B (9-38), 1C (38-57), 1D (59-65);
Texture : MOD PHYRIC, MEDIUM-GRAINED TO FINE-GRAINED(PCE 1D
NEAR GLASSY MARGIN);
Structure : MASSIVE;
Alteration : SLIGHTLY;
Comments : GREY;
Vesicles : VESICLES UNEVENLY DISTRIBUTED AND MOST OF THEM ARE
NEAR GLASSY MARGIN;
Phenocrysts: PLAGIOCLASE ( 3-5%)
Size(mm): 1-2
SIZE OF PLAG PHENOS RARELY UP TO 4-5;
COMBINATION
INCLUDES OL & CPX, FRESH & ENTIRELY & PARTLY
REPLACED BY SECONDARY MINERALS-SMECTITE;
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 670/ 880 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 249.88
Core: 29 Top of Core Depth (m) : 249.00
Sect: 1 Top of Section Depth(m): 249.67
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 2A (68-71), 2B (73-76), 2C (77-82), 3 (83-88);
Texture : SPARSELY PHYRIC, VERY FINE-GRAINED, GLASSY BASALT;
Alteration : SLIGHTLY;
Comments : DARK-GREY, PETROGRAPHICALLY SIMILAR TO ABOVE UNIT-
MAY BE FRAGMENTS OF SINGLE PILLOW;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: SMECTITE
Phenocrysts: CONTENT AND SIZE OF PHENOS ARE LESS THAN ABOVE
UNIT;
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 900/1250 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 250.25
Core: 29 Top of Core Depth (m) : 249.00
Sect: 1 Top of Section Depth(m): 249.90
LITHOLOGY: PLAG-OL-CPX SPARSELY PHYRIC BASALT;
Piece No. : PCES 4 (90-98), 5 (100-125);
Texture : SPARSELY PHYRIC, VERY FINE-GRAINED, GLASS;
Alteration : GLASS ALTERED TO PALAGONITE;
Comments : DARK-GREY, THERE IS ONE MASSIVE AND TWO PILLOW
COOLING UNITS, THE SURFACE OF CRACK OF PCE(5) IS
COVERED WITH FRAGMENTS OF ROOT OF SUBMARINE TREES;
Vesicles : Size(mm): Percent: 5
Location: Filling: SMECTITE
Phenocrysts: PLAGIOCLASE ( 1-3%)
Size(mm): 1-2
COMBINATION ( <1%)
Size(mm): TO 1
INCLUDES OL AND CPX REPLACED BY SMECTITE;
Replacement: SMECTITE
Minerals Replaced: GLASS
CARBONATE
Minerals Replaced: GLASS
PALAGONITE
Minerals Replaced: GLASS
Leg : 65 Top/Bottom Interval(mm): 0/1490 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 254.99
Core: 30 Top of Core Depth (m) : 253.50
Sect: 1 Top of Section Depth(m): 253.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1 (1-11), 2 (12-16), 3 (18-27), 4A (28-38),
4B (37-47), 4C (46-52), 4D (52-62), 4E (60-71),
4F (70-79), 5A (80-89), 5B (86-95), 5C (94-102),
5D (101-112), 5E 9112-119), 6 (123-125),
7A (127-135), 7B (138-142), 7C (142-149);
Texture : FINE-GRAINED, MOD PHYRIC, PCES(1-4B) HAVE PLAG-OL
GLOMEROPHYRIC CLOTS WHILE PCE(4D-7C) HAVE OL-PYX
GLOMEROPHYRIC CLOTS;
Structure : VEINS ARE FILLED WITH SULFIDE AND SMECTITE AND
SERPENTINE-TALC(?) IN PCES(5C-7C);
Alteration : FRESH;
Comments : THREE PILLOW UNITS: #'S 1(1-4C), 2(4B-5B), 3(5C-7C),
PCES(5C-7C) ARE SIMILAR TO PCES(4D-5B), PCES(1-4B)
ARE GREY;
Vesicles : Size(mm): Percent: 3
Location: Filling: SMECTITE,SULFIDES
PCE 2 IS VESICULAR(3%) AND PCES(5C-7C) ARE
VESICULAR WITH VESICLES MORE COMMON ON TOP OF
PILLOW;
Phenocrysts: COMBINATION ( 5-10%)
PCES(1-4B) HAVE COMBINATION OF PLAG-OL PHENOS(5%)
WITH PLAG GENERALLY <3MM BUT SOME LARGE CRYSTALS
OF 10MM AND OL PHENOS UP TO 4MM, ALSO SOME FRESH
OL ESPECIALLY THOSE IN GLOMEROPHYRIC CLOTS WITH
PLAG, PCES(4A-C) CONTAIN MORE OL PHENOS THAN 1 OR
2, PCES(4D-5B) HAVE COMBINATION OF MINOR CPX-OL-
PLAG PHENOS(7-10%) OF 1-5MM IN SIZE, OL AND PYX
OCCUR SEPARATELY OR AS GLOMEROCRYSTS AND
PCES(5C-7C) ARE SIMILAR TO PCES(4D-5B);
Replacement: SULFIDE
SERPENTINITE
TALC
ID OF SERPENTINE-TALC IS QUESTIONABLE;
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 256.50
Core: 30 Top of Core Depth (m) : 253.50
Sect: 2 Top of Section Depth(m): 255.00
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
PILLOW;
Piece No. : PCES 1 (1-7), 2 (9-17), 3 (18-26), 4 (28-34),
5 (37-44), 6 (46-51), 7A (53-60), 7B (60-65),
7C (65-72), 8 (73-77), 9 (79-87), 10 (90-94),
11A (96-103), 11B 9104-118), 11C (109-113),
12 (111-122), 13 (124-126), 14 (128-133),
15 (136-141), 16 (144-149);
Texture : MOD PHYRIC, FINE-GRAINED TO VERY FINE-GRAINED(NEAR
GLASSY MARGIN), SOME GLOMEROPHYRIC AGGREGATES;
Structure : HARILINE FRACTURES FILLED WITH SMECTITE, PILLOW
BASALT;
Alteration : SLIGHT TO MODERATE;
MODERATLY ALTERED NEAR FRACTURES;
Comments : THERE ARE FOUR COOLING UNITS OF PILLOW BASALTS EACH
WITH SIMILAR PETROGRAPHICAL COMPOSITION: #'S 1(1-5),
2(6-8), 3(9-11C), 4(12-16), THE FIRST COOLING UNIT
CONTINUES FROM CORE SECTION 30-1 PCE(7), DARK GREY;
Vesicles : Size(mm): Percent: 1-5
Location: Filling: SMECTITE
VESICLES ARE UNEVENLY DISTRIBUTED AND SOME ARE
EMPTY;
Phenocrysts: PLAGIOCLASE ( TO 5%)
Size(mm): 1.5-2
SOME PLAG UP TO 4MM;
COMBINATION ( <1%)
Size(mm): 1-2
COMBINATION OF OL-CPX PHENOS WITH PRESENCE OF CPX
QUESTIONABLE, PHENOS ARE ALMOST COMPLETELY
REPLACED BY SECONDARY MINERALS(GREENISH-BLUE SMEC
AND CARB(?)), SOMETIMES PHENOS FORM GLOMEROPHYRIC
AGGREGATES;
Replacement: SMECTITE
GREENISH-BLUE;
CARBONATE
ID CARBONATE NOT CERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 730 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 257.23
Core: 30 Top of Core Depth (m) : 253.50
Sect: 3 Top of Section Depth(m): 256.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW;
Piece No. : PCES 1 (2-9), 2A (12-17), 2B (18-24), 3 (25-33),
4A (35-42), 4B (42-51), 4C (51-57), 4D (58-65),
5 (68-73);
Texture : FINE-GRAINED, MOD PHYRIC, PCE 1 HAS A LARGE
GLOMEROPHYRIC AGGREGATE(CA 10MMX10MM) COMPOSED OF
PLAG AND FRESH OL AND CPX +/- SPINEL(?);
Structure : VEINS OF CALCITE AND SMECTITE AND TALC-SERPENTINE,
PILLOW BASALT;
Comments : PCE(1) APPEARS TO BE CONTINUATION OF PCE(16) CORE
30-2, GREY;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE,SMECTITE
Location: Filling: SULFIDES
SOME VESICLES ARE HOLLOW;
Phenocrysts: COMBINATION ( 5%)
INCLUDES PLAG-OL PHENOS, FEW PLAG PHENOS ARE
7-8MM ACROSS, MOST OF THE OL IS ALTERED WITH OL UP
TO 5MM;
Replacement: TALC
SERPENTINITE
ID TALC-SERPENTINE(?) NOT SURE;
SULFIDE
MINOR IN VEINS;
CALCITE
SMECTITE
Vesicles :
Location: Filling: CALCITE,SMECTITE
Location: Filling: SULFIDES
VESICLES ARE NEAR TOP OF UNITS;
Phenocrysts: COMBINATION ( 3-5%)
COMBINATION OF PLAG-OL PHENOS WITH MOSTLY PLAG
(1-3MM) AND OL(2-5MM) BUT MOST OF THE OL IS
ALTERED TO SMEC AND POSSIBLY SERPENTINE-TALC(?),
OL IS FRESH IN LARGE GLOMEROPHYRIC AGGREGATE WITH
PLAG-CPX-SPINEL(MAYBE) IN PCE(1);
CLINOPYROXENE
SPINEL
Replacement: CALCITE
SULFIDE
SERPENTINITE
TALC
ID SERPENTINE-TALC UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 259.50
Core: 31 Top of Core Depth (m) : 258.00
Sect: 1 Top of Section Depth(m): 258.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1 (1-9), 2 (12-18), 3 (20-25), 4 (27-29),
5A (30-36), 5B (37-43), 5C (43-51), 5D (50-56),
6A (58-66), 6B (66-71), 6C (72-78), 6D (77-86),
7 (98-94), 8A (96-111), 8B (112-120), 9 (123-127),
10 (132-139), 11 (141-149);
Texture : FINE-GRAINED, MOD PHYRIC;
Structure : VEINS OF TALC-SERPENTINE(?) WITH MINOR SULFIDE;
Comments : GREY;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE,SMECTITE
Location: Filling: SULFIDES
SOME VESICLES ARE HOLLOW;
Phenocrysts: COMBINATION ( 5%)
INCLUDES PLAG-OL PHENOS, FEW PLAG PHENOS ARE 7-8MM
ACROSS, MOST OF THE OL IS ALTERED WITH OL TO 5MM;
Replacement: TALC
SERPENTINITE
ID TALC-SERPENTINE(?) UNCERTAIN;
SULFIDE
MINOR IN VEINS;
CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 483B Sample Midpoint (m) : 261.00
Core: 31 Top of Core Depth (m) : 258.00
Sect: 2 Top of Section Depth(m): 259.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW(?);
Piece No. : PCES 1 (1-16), 2 (20-29), 3 (32-45), 4 (46-57),
5 (59-69), 6 (72-79), 7A (82-95), 7B (95-102),
8 (105-111), 9 (114-121), 10 (128-143),
11 (145-149);
Texture : FINE-GRAINED, MOD PHYRIC, PCE(7A) HAS ONE LARGE
(12MM) GLOMEROPHYRIC AGGREGATE OF PLAG-OL-CPX;
Structure : VEINS ARE POSSIBLY SMECTITE AND TALC-SERPENTINE(?),
COULD BE PILLOW(?) BASALT;
Comments : GREY, OL CONTENT APPEARS TO INCREASE NEAR BASE OF
UNIT(PCES 7A-7B), SIMILAR TO CORE 31-7;
Vesicles :
Location: Filling: SULFIDE,SMECTITE
Phenocrysts: PLAGIOCLASE ( TO 3%)
OLIVINE (2-2.5%)
PHENO CONTENT CA. 5% BUT OL PERHAPS MAKES UP TO
30-40% OF PHENOS, PCE 7A HAS LARGE(4MM) ALTERED OL
PHENO AND ALSO ONE LARGE(12MM) GLOMEROCRYSTIC
AGGREGATE OF 60% FRESH OL & 30% PLAG & 10% CPX,
OL CONTENT APPEARS TO INCREASE NEAR BASE OF UNIT;
Replacement: SMECTITE
SULFIDE
MINOR SULFIDE IN VESICLES;
TALC
SERPENTINITE
ID TALC-SERPENTINE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/1210 Analyst: Zolotarev, B.
Hole: 483B Sample Midpoint (m) : 262.21
Core: 31 Top of Core Depth (m) : 258.00
Sect: 3 Top of Section Depth(m): 261.00
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
PILLOW;
Piece No. : PCES 1A (1-12), 1B (13-17), 1C (17-22), 1D (23-35),
1E (36-42), 2A (43-52), 2B (54-60), 3 (63-67),
4 (72-76), 5 (77-85), 6A (88-96), 6B (97-107),
7 (110-121);
Texture : MOD PHYRIC, FINE-GRAINED TO VERY FINE-GRAINED NEAR
GLASSY MARGIN;
Structure : STRONGLY FRACTURED WITH CARB & SMEC & MONT
& VERY RARE PYRITE AS FILLINGS, THERE ARE THREE
PILLOW UNITS;
Alteration : MODERATE;
Comments : THERE ARE THREE COOLING UNITS(PILLOW UNITS): 1(1A-
1C), 2(1D-4), 3(5-7), THE FIRST ONE CONTINUES FROM
SECTION31-2(PCES 10-11), ALL SAMPLES HAVE THE SAME
PETROGRAPHICAL COMPOITION, DARK GREY;
Vesicles : Size(mm): Percent: 1-3
Location: Filling: PYRITE,SMECTITE
VESICLES ARE FILLED WITH SMECTITE AND SOMETIMES
THE INNER WALLS ARE COVERED BY PYRITE;
Phenocrysts: PLAGIOCLASE ( 2-3%)
Size(mm): 1.5-2
SOME PLAG PHENOS ARE 2-3MM;
COMBINATION ( <1%)
INCLUDES OL-CPX PHENOS WITH PRESENCE OF CPX
QUESTIONABLE, PHENOS ARE COMLETELY REPLACED BY
SECONDARY MINERALS(SMECTITE AND CLAY);
Replacement: SMECTITE
CARBONATE
PYRITE
MONTMORILLONITE
CLAY
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Flower, M.
Hole: 483B Sample Midpoint (m) : 264.00
Core: 32 Top of Core Depth (m) : 262.50
Sect: 1 Top of Section Depth(m): 262.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (0-8), 2A (10-15), 2B (15-30), 2C (30-43),
2D (44-60), 2E (57-71), 2F (72-80), 3 (82-94),
4 (95-102), 5A (104-112), 5B (112-124),
5C (124-135), 5D (134-137), 5E (134-144),
5F (144-150);
Texture : SPARSELY PHYRIC, FINE-GRAINED, PART OF PCES(4D & 5A)
IS COOLING RIND ALTERED TO SMECTITE;
Structure : MOST VEINS FILLED WITH GREEN SMECTITE WITH
OCCASIONAL BROWNISH VARIANTS(OXIDIZED ?) IN PCES(2B,
5A,5B);
Alteration : MODERATE
OL IN PCE(5A) SHOWS ALTERATION OF SERP/SMEC(?) TO
CARB TO OXIDIZED BROWN PHASE(?) IN SEQUENCE;
Comments : TWO COOLING UNITS BOTH WITH SAME LITHOLOGY: 1(1-3),
2(4-5), GREY;
Vesicles : FINE AMYGDULES OF SMEC THROUGHOUT;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 1
OLIVINE
RARE OL PHENOS BECOMING MORE ABUNDANT IN COOLING
UNIT CENTERS(?), IN PCES(5F,3E) UP TO 4MM,
ALTERATION OF OL TO CALCITE & SERPENTINE & CARB;
Replacement: CARBONATE
SMECTITE
SERPENTINITE
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Morrison, M. Ann
Hole: 483B Sample Midpoint (m) : 265.50
Core: 32 Top of Core Depth (m) : 262.50
Sect: 2 Top of Section Depth(m): 264.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1A (0-13), 1B (14-19), 1C (20-30), 2 (32-35),
3A (33-48), 3B (47-60), 3C (60-69), 3D (61-68),
3E (70-73), 3F (73-83), 3G (84-86), 3H (87-92),
4A (94-101), 4B 91-20111), 4C (112-116),
4D (117-126), 5 (129-134), 6A (136-143),
6B (143-150);
Texture : MOD PHYRIC, PCES(1C,2,3H,4A) HAVE GLASSY RINDS AND
PCES(6A,6B) HAVE CHILLED MARGINS;
Structure : VEINS OF SMEC-SULFIDES-CALCITE BUT MAINLY SMECTITE
(DARK GREEN-BROWN(OXICIZED));
Alteration : SLIGHT;
Comments : PCE 1A FITS WITH PCE 5F OF 32-1, FOUR COOLING UNITS;
1(1-2), 2(3A-3H), 3(4A-6A), 4(6B-ON), PCES(1-2) ARE
CONTINUATION OF BOTTOM OF UNIT 32-1, ALL UNITS HAVE
SIMILAR LITHOLOGY;
Vesicles : Size(mm): Percent: .5-1
Location: TO1 Filling: SMECTITE,CALCITE
Phenocrysts: ( 2-3%)
Size(mm): TO 6
PCE 6B HAS 5% PLAG PHENOS WHILE OTHER PCES APPEAR
TO SHOW VARIATION OF 5% PLAG TO 1% OL IN UPPER
PART OF COOLING UNIT AND 2-3% PLAG TO 2% OL NEAR
BASE;
OLIVINE ( 1-2%)
Size(mm): 3-4
OL REPLACED BY SMECTITE AND CALCITE, IN SOME PCES
BROWN ALTERATION PRODUCT EXPECIALLY IN PCE 6A;
CLINOPYROXENE
MINOR CPX IN GLOMEROCRYSTS WITH PLAG;
Replacement: CALCITE
SULFIDE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/ 820 Analyst: Flower, M.
Hole: 483B Sample Midpoint (m) : 266.32
Core: 32 Top of Core Depth (m) : 262.50
Sect: 3 Top of Section Depth(m): 265.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCES 1 (0-8), 2 (12-15), 3 (17-22), 4 (23-30),
5 (31-39), 6 (43-56), 7 (60-68), 8 (81-83),
9 (77-82);
Texture : MOD PHYRIC, PCES(2,3,7) HAVE GLASS MARGIN, PCE 5 HAS
GLOMEROCRYSTIC PLAG(AND MINOR OPHITIC CPX) AND OL,
PCE(8) HAS GLASSY MATRIX;
Structure : PCE 4 IS FRACTURED BASALT WITH MUCH SMECTITE ON THE
FRACTURE SURFACES, PCE 6 HAS ODD FRAGMENTS COATED
WITH GREEN SMECTITE;
Alteration : FRESH
PCES(2,4) SLIGHTLY ALTERED;
Comments : GREY, PCE(5) IS SIMILAR TO PCE(4), ORIENTATION OF
PCES(2,3) IS NOT CLEAR, PCE(7) IS TOP OF NEW COOLING
UNIT;
Phenocrysts: PLAGIOCLASE ( 2-3%)
PCE(1) IS MOD PHYRIC WHILE REST OF PCES ARE
SPARSELY PHYRIC WITH PLAG>OL, PCE(5) IS MORE
PHYRIC THAN PCE(4), PCES(2,3,8) HAVE NO PHENOS;
OLIVINE
Size(mm): <1ROUNDED
PLAG>OL, PCE(5) HAS GLOMEROCRYSTIC PLAG AND MINOR
OPHITIC CPX AND ROUNDED ALTERED OL;
CLINOPYROXENE
MINOR OPHITIC CPX;
Replacement: SMECTITE
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