Leg : 65 Top/Bottom Interval(mm): 0/ 550 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 149.05
Core: 11 Top of Core Depth (m) : 145.50
Sect: 3 Top of Section Depth(m): 148.50
LITHOLOGY: SEDIMENT;
PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1A (56-69), 1B (70-86), 2A (88-96),
2B (97-118), 2C (117-122), 3 (130-134), 4 (137-140),
5 (142-150);
Texture : SPARSELY PHYRIC, FINE-GRAINED BUT APPEARS TO BECOME
COARSER-GRAINED N PCES(3,4,5), PCE 1A IS VERY FINE-
GRAINED AND HAS THIN 3MM GLASSY MARGIN;
Structure : VEINS OF CALCITE;
Comments : PCE 1A HAS BRECCIATED AND INDURATED SEDIMENT WITH
THREE DEFORMED FORAMS(ONE GOOD ONE DESTROYED BY
ACID) AND CLASTS OF GLASS, FELDSPARS AND MUD(?)
STUCK TO GLASSY MARGIN, SOFT SEDIMENT ON GLASSY
MARGIN IS SANDY WITH FORAMS AND GLASSY CLASTS;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
NEAR UPPER CONTACT WITH SEDIMENT;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): <1
FEW PLAG LATHS(4MMX1MM) SEEN;
Groundmass : PLAGIOCLASE
IN PCE 5;
Replacement: CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 156.50
Core: 12 Top of Core Depth (m) : 155.00
Sect: 1 Top of Section Depth(m): 155.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (108), 2A (11-17), 2B (18-42), 3 (44-51),
4A (53-72), 4B (71-82), 5 (84-90), 6 (93-97),
7 (99-103), 8 (106-113), 9 (115-129), 1D (130-140),
11 (148-150);
Texture : SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED;
Structure : MASSIVE, FRACTURED VERY SLIGHTLY PCES(2A,4B) AND
FILLED WITH CARB & SMEC & PYRITE, SOMETIMES ROCK
NEAR FRACTURES IS IMPREGNATED WITH PYRITE PCE(2A);
Alteration : FRESH;
Comments : GREY, SAMPLES FROM PCES(1-5 & 6-11) ARE SLIGHTLY
DIFFERENT GRAINED SO MAY BE TWO COOLING UNITS(?);
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 1.5-2
OLIVINE ( TR%)
Size(mm): TO 3
POSSIBLY OL PHENOS REPLACED BY SECONDARY MINERALS
(GREY-BLUE SMEC(?));
Replacement: SMECTITE
ID NOT CERTAIN OF SMEC IN PHENOS;
CARBONATE
PYRITE
Leg : 65 Top/Bottom Interval(mm): 0/1410 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 159.41
Core: 13 Top of Core Depth (m) : 158.00
Sect: 1 Top of Section Depth(m): 158.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (3-13), 1B (14-22), 1C (22-28), 2A (29-36),
2B (37-45), 2C (45-48), 2D (47-56), 2E (56-65),
2F (65-73), 2G (73-90), 2H (90-107), 3 (109-140);
Texture : MOD PHYRIC, FINE-GRAINED,THERE MAY BE SOME PRESERVED
GROUNDMASS GLASS;
Structure : MASSIVE, CALCITE VEIN 1-2MM IN PCES(1A,2B-D), VERY
THIN HAIRLINE CRACKS IN LOWER HALF OF SECTION FILLED
WITH CALCITE AND SOME SULFIDE PRESENT;
Alteration : FRESH
VERY;
Comments : POSSIBLY MAIN PART OF COOLING UNIT THAT STARTED IN
12-1 AND ENDS IN 14-1;
Vesicles : VESICLES VERY RARE EXCEPT "CAVERNOUS" VESICLE(?)
IN PCE 2B;
Phenocrysts: PLAGIOCLASE
Size(mm): <1
OLIVINE
Size(mm): TO 3
CALCITE IN UPPER PART OF SECTION REPLACES OLIVINE
MICROPHENOS;
Replacement: CALCITE
CALCITE MORE COMMON IN GROUNDMASS OF UPPER PART OF
SECTION(REPLACING OL MICROPHENOS), ALSO CALCITE
NEAR FRACTURES & LARGE VESICLES PCES(2B-D);
SMECTITE
GREEN SMEC(?) MORE COMMON IN LOWER PART, BLUISH
SMEC COATING IN PCE(2B);
SULFIDE
SULFIDE WITH CALCITE VEINS IN PCES(2B-D,1A),
LITTLE IN GROUNDMASS-NEAR FRACTURES AND LARGE
VESICLES PCES(2B-D);
Leg : 65 Top/Bottom Interval(mm): 0/ 640 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 160.14
Core: 14 Top of Core Depth (m) : 159.50
Sect: 1 Top of Section Depth(m): 159.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (2-11), 1B (11-18), 1C (19-27), 1D (27-35),
1E (34-57), 1F (56-64);
Texture : SPARELY PHYRIC, FINE-GRAINED;
Structure : MASIVE, FRACTURES VERY RARE AND SMALL(HAIRLINE) AND
FILLED WITH CARB;
Alteration : FRESH;
Comments : GREY, SAME UNIT AS ABOVE(13-1);
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 1-2
SOME RARE PLAG PHENOS TO 3MM;
OLIVINE ( TR%)
OL PHENOS QUESTIONABLE SINCE COMPLETELY REPLACED
BY BLUE-GREENISH MATERIAL(SMECTITE);
Replacement: SMECTITE
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/ 70 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 173.57
Core: 16 Top of Core Depth (m) : 173.50
Sect: 1 Top of Section Depth(m): 173.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (0-7);
Texture : SPARSELY PHYRIC, FINE-GRAINED, SOMETIMES PLAG LATHS
FORM GLOMEROPHYRIC AGGREGATES;
Structure : MASSIVE;
Alteration : FRESH;
Comments : SAME UNIT AS ABOVE;
Vesicles :
Location: Filling: CARBONATE
VESICLES ARE RARE AND SMALL;
Phenocrysts: PLAGIOCLASE
Size(mm): 1-2
PLAG PHENOS ARE VERY RARE AND SMALL, SOMETIMES
LATHS OF PLAG FORM GLOMEROPHYRIC AGGREGATES;
Replacement: CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 182.00
Core: 17 Top of Core Depth (m) : 180.50
Sect: 1 Top of Section Depth(m): 180.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-5), 2A (7-16), 2B (14-25), 2C (25-34),
2D (33-45), 2E (45-53), 3 (57-61), 4 (64-74),
5 (76-84), 6A (86-100), 6B (10-106), 6C (105-124),
6D (125-133), 7A (137-142), 7B (143-150);
Texture : APHYRIC, FINE TO MEDIUM-GRAINED, TRACE PLAG PHENOS
UP TO 2MM;
Structure : MASSIVE, ROCK STRONGLY FRACTURED PCES(3,4,5,7) AND
FRACTURES FILLED WITH CALCITE, THICKNESS OF CALCITE
VEINS UP TO 10-12MM;
Alteration : FRESH;
Comments : GREY, SAME AS ABOVE UNIT BUT LESS PLAG PHENOS;
Vesicles :
Location: Filling: CALCITE
VESICLES ARE RARE AND SMALL;
Phenocrysts: PLAGIOCLASE ( TR%)
Size(mm): 2
Replacement: CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1110 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 183.11
Core: 17 Top of Core Depth (m) : 180.50
Sect: 2 Top of Section Depth(m): 182.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-11), 2 (13-18), 3 (20-25), 4 (27-34),
5 (35-43), 6 (4-52), 7 (54-56), 8A (60-72),
8B (70-83), 9 (80-91), 10 (94-111);
Texture : FINE TO MEDIUM-GRAINED, APHYRIC ALTHOUGH SOME VERY
RARE(TR) PLAG PHENOS PRESENT(SIZE TO 2MM);
Structure : MASSIVE, STRONGLY FRACTURED AND FILLED WITH CALCITE;
Comments : TWO COOLING UNITS: 1(1-6) & 2(8-10), PCE 7 IS MEDIUM
GREY LIMESTONE AND PCE 8A HAS A BASALT MARGIN AT
CONTACT WITH SEDIMENT FRACTURED TO BRECCIA AND
IMPREGNATED BY CALCITE, GAP FILLED WITH LITHIFIED
SEDIMENT;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( TR%)
Size(mm): 2
VERY RARE;
Replacement: CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/ 630 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 184.13
Core: 18 Top of Core Depth (m) : 183.50
Sect: 1 Top of Section Depth(m): 183.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (0-6), 2 (7-34), 3A (35-52), 3B (53-58),
4 (59-63);
Texture : APHYRIC, FINE TO MEDIUM-GRAINED WITH PCES(3B,4)
FINER GRAINED THAN PCE(2), MINOR AMOUNTS OF ALTERED
OL AND PLAG PHENOS(<<1%);
Structure : MASSIVE, VEINS OF CALCITE AND SMECTITE;
Comments : GREY;
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 630/1500 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 185.00
Core: 18 Top of Core Depth (m) : 183.50
Sect: 1 Top of Section Depth(m): 184.13
LITHOLOGY: SEDIMENT;
PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (0-3);
Texture : SPARSELY PHYRIC, FINE-GRAINED TO GLASSY(THIN RIND
FRAGMENTS);
Comments : INDURATED SEDIMENT COATING BASALT FRAGMENTS ON TOP
OF SEDIMENT SECTION;
Phenocrysts: PLAGIOCLASE
Size(mm): 3
Replacement: SULFIDE
SOME SULFIDE AND ZEOLITE(?) COATING;
ZEOLITE
ID ZEOLITE QUESTIONABLE;
Leg : 65 Top/Bottom Interval(mm): 30/1500 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 203.00
Core: 22 Top of Core Depth (m) : 201.50
Sect: 1 Top of Section Depth(m): 201.53
LITHOLOGY: SEDIMENT;
Leg : 65 Top/Bottom Interval(mm): 0/ 400 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 211.90
Core: 23 Top of Core Depth (m) : 211.50
Sect: 1 Top of Section Depth(m): 211.50
LITHOLOGY: SEDIMENT;
Piece No. : PCES 1 (1-10), 2 (11-40);
Leg : 65 Top/Bottom Interval(mm): 430/ 480 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 211.98
Core: 23 Top of Core Depth (m) : 211.50
Sect: 1 Top of Section Depth(m): 211.93
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCE 3 (43-48);
Texture : SPARSELY PHYRIC, VERY FINE-GRAINED, 1-2MM RIND OF
DEVITRIFIED GLASS;
Comments : SEDIMENT-BASALT CONTACT, LIGHT-GREEN BEDDED
SANDSTONE WITH SOME CARBONATE MATRIX PARTLY
ENVELOPING BULBOUS BASALT;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE,PYRITE
Replacement: CALCITE
PYRITE
Leg : 65 Top/Bottom Interval(mm): 500/1500 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 213.00
Core: 23 Top of Core Depth (m) : 211.50
Sect: 1 Top of Section Depth(m): 212.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 4A (50-70), 4B (69-84), 4C (85-105),
4D (105-113), 4E (114-123), 4F (124-150);
Texture : SPARSELY PHYRIC, VERY FINE(TOP) TO MEDIUM-GRAINED
(BASE);
Structure : MASSIVE, FRACTURES MOSTLY SUBHORIZONTAL AND FILLED
CHIEFLY WITH CALCITE;
Alteration : ALTERATION HALOES IN PCE(4F) WITH ABUNDANT PYRITE;
Comments : COOLING UNIT CONTINUING INTO 23-2;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMECTITE
VESICLES VERY RARE IN TOP PART AND FILLED WITH
GREEN SMECTITE AT BASE;
Phenocrysts: PLAGIOCLASE ( <2%)
Size(mm): <3
OLIVINE
MICROPHENOS OF OL;
Replacement: PYRITE
PERVASIVE PYRITE IN UPPER 5CM OF PCE(4A);
CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1090 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 214.09
Core: 23 Top of Core Depth (m) : 211.50
Sect: 2 Top of Section Depth(m): 213.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-15), 1B 915-38), 1C (38-52), 1D (53-71),
1E (71-83), 1F (84-109);
Texture : SPARSELY PHYRIC, MEDIUM TO COARSE-GRAINED;
Structure : MASSIVE, FRACTURES FILLED DOMINANTLY WITH CALCITE &
SOME SMECTITE IN PCE 1E;
Comments : CONTINUING UNIT FROM 23-1;
Vesicles : Size(mm): Percent: <<1
VERY RARE;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): <4
Replacement: SMECTITE
GREEN SMECTITE IN GNDMSS-PROBABLY REPLACING GLASS
AND OLIVINE;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 216.00
Core: 23 Top of Core Depth (m) : 211.50
Sect: 3 Top of Section Depth(m): 214.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-70), 1B 971-86), 1C (85-109),
1D (110-120), 1E (140-149);
Texture : SPARSELY PHYRIC, COARSE-GRAINED;
Structure : MASSIVE, FRACTURE MORE ABUNDANT IN LOWER HALF SUB-
HORIZONTAL TO SUBVERTICAL, ABUNDANT SUBVERTICAL
VEINS IN LOWER HALF MOSTLY SMECTITE-FILLED WITH SOME
CALCITE, SLICKENSIDES MOSTLY SUBHORIZONTAL, REDDISH-
WHITE SOFT ZEOLITE(?) AND CLAY(?) IN VEIN PCE(1B);
Alteration : FRESH TO SLIGHT;
PCES(1D-1F) SHOW INCREASE N ALTERATION;
Comments : CONTINUING UNIT FROM 23-2;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): <4
VERY RARE LARGE 1.5CM CRYSTALS;
Replacement: SULFIDE
MINOR;
ZEOLITE
ID ZEIOLITE UNCERTAIN;
CLAY
ID CLAY UNCERTAIN;
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/ 310 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 216.31
Core: 23 Top of Core Depth (m) : 211.50
Sect: 4 Top of Section Depth(m): 216.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-15), 1B (15-24), 1C (24-31);
Texture : SPARSELY PHYRIC, COARSE-GRAINED;
Structure : MASSIVE;
Comments : CONTINUING UNIT FROM 23-3, GRAIN SIZE APPEARS TO
HAVE INCREASED FROM TOP OF 23-1 TO 23-4;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): <3
Leg : 65 Top/Bottom Interval(mm): 0/1360 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 217.36
Core: 24 Top of Core Depth (m) : 216.00
Sect: 1 Top of Section Depth(m): 216.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A 92-35), 1B 935-43), 1C (44-67), 1D (69-81),
1E (81-97), 1F (99-107), 1G (107-113), 1H (114-136);
Texture : SPARSELY PHYRIC, MED TO COARSE-GRAINED, SOMETIMES
PHENOS AND PLAG LATHS FORM GLOMEROPHYRIC AGGREGATES;
Structure : MASSIVE, SOME FRACTURES FILLED WITH SMEC AND RARE
PYRITE-PCES(1C,1D), SOMETIMES THERE AR MIRROR
SURFACES NEAR EPIDOTE(MOD GREENISH YELLOW) AND SMEC
AND CHLORITE(?);
Alteration : FRESH
ROCK LOOKS PRETTY FRESH;
Comments : GREY;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 1-2
SOME RARE PLAG PHENOS UP TO 3MM, SOME PHENOS AND
PLAG LATHS FORM GLOMEROPHYRIC AGGREGATES;
Groundmass : CLINOPYROXENE
DARK-BROWNISH CRYSTALS OF CPX SEEN IN GNDMSS;
Replacement: SMECTITE
PYRITE
RARE;
EPIDOTE
MOD GREENISH-YELLOW;
CHLORITE
ID CHLORITE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/1320 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 218.82
Core: 24 Top of Core Depth (m) : 216.00
Sect: 2 Top of Section Depth(m): 217.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASIVE;
Piece No. : PCES 1A (1-25), 1B (25-47), 1C (48-77), 1D (77-100),
1E (102-132);
Texture : SPASRSELY PHYRIC, MED TO COARSE-GRAINED, PLAG-CPX
GLOMEROPHYRIC AGGREGATES, HOLOCRYSTALLINE;
Structure : MASSIVE, FRACTURE VERY RARE AND THIN(HAIRLINE) AND
FILLED WITH SMECTITE AND PYRITE;
Alteration : FRESH;
Comments : SMAE COOLING UNIT AS ABOVE, GREY;
Vesicles : Size(mm): Percent: 0
NONE OBVOUS;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): 1-2
SOME RARE PLAG PHENOS TO 3MM, ALSO GLOMEROPHYRIC
AGGREGATES OF PLAG AND CPX;
CLINOPYROXENE
VERY RARE;
Replacement: SMECTITE
PYRITE ( TR%)
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 220.50
Core: 24 Top of Core Depth (m) : 216.00
Sect: 3 Top of Section Depth(m): 219.00
LITHOLOGY: PLAG-CPX SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-22), 1B (24-32), 1C (32-47), 1D (48-58),
1E (59-69), 1F (70-83), 1G (84-92), 1H (93-100),
1I (101-107), 1J (108-114), 1K (115-122),
IL (123-133), 1M (133-142), 1N (143-150);
Texture : SPARSELY PHYRIC, COARSE-GRAINED, HOLOCRYSTALLINE,
SOME PLAG LATHS FORM GLOMEROPHYRIC AGGREGATES WITH
CPX;
Structure : MASSIVE, FRACTURES VERY RARE PCE(1A) AND THIN AND
FILLED WITH SMEC AND CARB AND PYRITE(TR);
Alteration : FRESH;
Comments : SAME COOLING UNIT AS ABOVE;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 1-2
(AG LA%)
Size(mm): THS FORM G
WITH CPX;
CLINOPYROXENE
Replacement: CARBONATE
PYRITE ( TR%)
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/ 480 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 220.98
Core: 24 Top of Core Depth (m) : 216.00
Sect: 4 Top of Section Depth(m): 220.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-9), 1B 910-23), 1C (24-31), 1D (31-37),
1E (38-48);
Texture : SPARSELY PHYRIC, COARSE-GRAINED, HOLOCRYSTALLINE;
Structure : MASSIVE;
Alteration : FRESH;
Comments : SAME COOLING UNIT AS ABOVE, GREY;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): 1-2
RARE PHENOS TO 3MM;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 222.50
Core: 25 Top of Core Depth (m) : 221.00
Sect: 1 Top of Section Depth(m): 221.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-61), 1B (62-81), 1C (82-100),
1D (100-108), 1E (118-150);
Texture : SPARSELY PHYRIC, COARSE-GRAINED, SOME PLAG LATHS
FORM GLOMEROPHYRIC AGGREGATES WITH CPX;
Structure : MASSIVE, VERY SLIGHTLY FRACTURED & FRACTURES FILLED
WITH SMEC AND CALCITE AND TRACE PYRITE;
Alteration : FRESH;
Comments : GREY, SAM COOLING UNIT AS ABOVE;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( 2-3%)
Size(mm): 1-2
RARE PHENOS TO 3MM, PLAG LATHS FORM GLOMEROPHYRIC
AGGREGATES WITH CPX;
CLINOPYROXENE
Replacement: CALCITE
PYRITE ( TR%)
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1260 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 223.76
Core: 25 Top of Core Depth (m) : 221.00
Sect: 2 Top of Section Depth(m): 222.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-32), 1B (33-50), 1C (50-59), 1D (57-80),
1E (81-105), 1F (106-115), 1G (116-126);
Texture : SPARSELY PHYRIC, COARSE-GRAINED, HOLOCRYSTALLINE;
Structure : MASSIVE, SLIGHTLY FRACTURED AND FILLED WITH SMECTITE
AND CALCITE AND PYRITE(TR);
Alteration : FRESH;
Comments : SAME UNIT AS ABOVE(25-1) BUT MORE AND LARGER PHENOS;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): 1-2
RARE PHENOS TO 5MM;
Replacement: SMECTITE
CALCITE
PYRITE
Leg : 65 Top/Bottom Interval(mm): 0/ 550 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 224.55
Core: 25 Top of Core Depth (m) : 221.00
Sect: 3 Top of Section Depth(m): 224.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-30), 2 (33-45), 3 (48-55);
Texture : SPARSELY PHYRIC, COARSE-GRAINED, HOLOCRYSTALLINE;
Structure : MASSIVE;
Alteration : FRESH;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): 1-2
RARE PHENOS TO 3MM;
OLIVINE ( <1%)
Size(mm): 1-2
OL REPLACED BY SECONDARY MINERALS(SMECTITE(?));
Replacement: SMECTITE
ID SMECTITE UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 200 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 226.20
Core: 26 Top of Core Depth (m) : 226.00
Sect: 1 Top of Section Depth(m): 226.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-12), 1B (11-20);
Texture : MOD PHYRIC, FINE-GRAINED BECOMING VERY FINE-GRAINED
TOWARDS BASE;
Structure : MASSIVE, SUBHORIZONTAL CALCITE FILLED FRACTURES;
Comments : SAME COOLING UNIT AS CORE 25-APPEARS COARSE IN 25-1
BUT DECREASING NOTABLY BUT GRADUALLY FROM TOP OF
25-2 THRU 25-3 AND 26-1;
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): <4
OLIVINE ( 1-2%)
Size(mm): <5
MICROPHENOS OF OL, PHENOS APPEAR FRESH IN PCE(1A)
AND ARE REPLACED BY CALCITE & SMECTITE IN PCE(1B);
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 220/1500 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 227.50
Core: 26 Top of Core Depth (m) : 226.00
Sect: 1 Top of Section Depth(m): 226.22
LITHOLOGY: SEDIMENT;
MUDSTONE;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 241.00
Core: 29 Top of Core Depth (m) : 239.50
Sect: 1 Top of Section Depth(m): 239.50
LITHOLOGY: PLAG-CPX SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-11), 1B 912-24), 1C (25-32), 1D (35-49),
1E (49-62), 1F (63-75), 1G (76-92), 1H (92-105),
1I (104-115), 1J (116-135), 1K (136-150);
Texture : SPARSELY PHYRIC, GRADUAL INCREASE IN GRAIN SIZE FROM
PCE(1A)(FINE-GRAINED) TO PCE 1K;
Structure : MASSIVE, VEINS OF SMECTITE AND CALCITE AND TRACE
SULFIDES, AT LEAST TWO GENERATIONS IN PCE(1E), A 4MM
WIDE VEIN OF CALCITE AND SMECTITE OFFSET 5CM ALONG
THIN SMECTITE AND CALCITE LINED FAULT, CALCITE AND
SMECTITE IN APPROZIMATELY EQUAL PROPORTIONS IN
VEINS;
Alteration : FRESH
NO ALTERATION HALOS AROUND VEINS;
Comments : CONTINUOUS SECTION;
Vesicles : Size(mm): Percent: <<1
Location: Filling: SMECTITE,CALCITE
VESICLES ARE VERY RARE WITH SMECTITE LINING AND
CALCITE CENTRES;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 1-3
PLAG-CPX GLOMEROCRYSTS, PCE(1A) HAS SLIGHTLY
GREATER CONCENTRATION OF PLAG APPROXIMATELY 1% AND
PCE(1I) HAS PLAG MEGACRYST (7MM) WITH INCLUSIONS
OF SPINEL AND POSSIBLY ANOTHER PHASE, SEVERAL PLAG
PHENOS HAVE CALCITE ALONG CLEAVAGES;
CLINOPYROXENE ( TR%)
SPINEL
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1480 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 242.48
Core: 29 Top of Core Depth (m) : 239.50
Sect: 2 Top of Section Depth(m): 241.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-7), 1B (7-16), 1C (17-26), 1D (25-34),
1E (34-41), 1F (40-45), 2A (47-56), 2B (56-63),
3A (64-72), 3B (70-78), 3C (77-87), 3D (86-94),
3E (64-72), 3F (104-110), 3G (110-125),
3H (125-135), 3I (135-148);
Texture : APHYRIC, MEDIUM-GRAINED, ONE SMALL PLAG PHENO PER
30CM OF CORE;
Structure : MASSIVE, VEINS OF CALCITE & SMEC & MINOR SULFIDES;
Comments : ROCK IS ACQUIRING A DEFINITE GREENISH TINT AND
CONTAINS A TRACE OF GROUNDMASS CALCITE, A DARK SOFT
CICULAR MINERAL(CHLORITE? AFTER PYX OR AMPHIBOLE-
URALITE?) MORE PROMINENT IN LOWER PARTS OF CORE,
SECTION CONTINUES FROM 29-1, GREENISH-GRAY, PCE(1A)
OF SECTION 2 FITS PCE(1K) OF SECTION 1;
Replacement: SMECTITE
COULD BE GREENISH SMECTITE REPLACING OL(?);
CALCITE
ALSO IN GROUNDMASS;
SULFIDES
MINOR;
CHLORITE
ID CHLORITE UNCERTAIN BUT COULD BE RESULT OF
ALTERATION;
Leg : 65 Top/Bottom Interval(mm): 0/1450 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 243.95
Core: 29 Top of Core Depth (m) : 239.50
Sect: 3 Top of Section Depth(m): 242.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-8), 1B (7-20), 1C (20-30), 1D (30-36),
1E (37-45), 1F (47-59), 1G (59-67), 1H (67-78),
1I (78-91), 1J (91-98), 1K (99-110), 1L (109-120),
1M (120-132), 1N (133-145);
Texture : APHYRIC, GRAIN SIZE COARSENS GRADUALLY BUT
CONTINUOUSLY, GNDMSS PLAG 2-3MM IN LENGTH WITH
DEVELOPMENT OF SUBOPHITIC TEXTURES;
Structure : MASSIVE, VEINS OF CALCITE & SMEC & SULFIDES LESS
COMMON THAN IN SECTION 1 AND 2;
Comments : CONTINUATION OF MASSIVE ASALT FROM PREVIOUS
SECTION, PCE(1A) FITS WITH PCE(3I) SECTION 2, UNIT
EXTENDS FROM CORE 29-1 TO 30-3, ROCK HAS GREEN
TINGE, MANY OF GROUNDMASS MINERALS ARE SOFT;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Groundmass : PLAGIOCLASE
PLAG IS 2-3MM IN LENGTH;
Replacement: CALCITE
PRESENT IN GROUNDMASS;
SULFIDES
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/ 920 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 244.92
Core: 29 Top of Core Depth (m) : 239.50
Sect: 4 Top of Section Depth(m): 244.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-9), 1B (9-20), 1C (20-36), 1D (36-52),
1E (53-66), 1F (66-78), 1G (78-92);
Texture : APHYRIC, COARSE-GRAINED WITH GRAIN SIZE INCREASING
DOWNWARDS, INTERGRANULAR OR SUBOPHITIC TEXTURE;
Structure : MASSIVE;
Alteration : SOFT GREENISH ALTERATION(?);
Comments : GREENISH-GRAY, PCE(1A) FITS WITH PCE(1N) OF CORE
29-3;
Groundmass : PLAGIOCLASE
Size(mm): >3
GROUNDMASS PLAG LATHS OVER 3MM LONG;
Leg : 65 Top/Bottom Interval(mm): 0/ 120 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 249.62
Core: 30 Top of Core Depth (m) : 249.50
Sect: 1 Top of Section Depth(m): 249.50
LITHOLOGY: PAHYRIC BASALT;
Piece No. : PCES 1 (0-5), 2 (7-11);
Texture : APHYRIC, FINE-GRAINED;
Structure : PCE(1) HAS VEIN OF SMEC & CALCITE & SULFIDES ON
SURFACE;
Comments : GREY;
Replacement: SMECTITE
CALCITE
SULFIDES
Leg : 65 Top/Bottom Interval(mm): 130/1460 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 250.96
Core: 30 Top of Core Depth (m) : 249.50
Sect: 1 Top of Section Depth(m): 249.63
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 3A (13-33), 3B (34-42), 3C (42-50), 3D (50-58),
3E (58-64), 4A (66-82), 4B (82-100), 4C (101-120),
4D (119-137), 4E (138-146);
Texture : APHYRIC, MEDIUM TO COARSE-GRAINED WITH GRAIN SIZE
VARYING IRREGULARLY, PLAGIOCLASES UP TO 3-4MM LONG
HAVE OPHITIC TEXTURE, NO OBVIOUS PHENOCRYSTS;
Structure : MASSIVE, PCES(3D,3E,4A) CUT BY VEINS OF SMECTITE AND
CALCITE AND SULFIDES;
Alteration : SLIGHTLY;
Comments : GREY-GREEN, NO OLIVINE RECOGNIZED, GNDMSS RICH IN
SECONDARY MINERALS;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Groundmass : PLAGIOCLASE
Size(mm): 3
PLAG LATHS UP TO 3MM LONG;
Replacement: SULFIDES
SMECTITE
CALCITE
CHLORITE
MANY OF THE PYX SHOW PARTIAL REPLACEMENT BY SOFT
FIBROUS MINERAL-AMPHIBOLE(?);
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 252.50
Core: 30 Top of Core Depth (m) : 249.50
Sect: 2 Top of Section Depth(m): 251.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-15), 1B (15-27), 1C (28-45), 1D (44-54),
1E (55-66), 1F (66-80), 1G (80-103), 1H (104-116),
1I (118-135), 1J (136-150);
Texture : APHYRIC, COARSE TO VERY COARSE-GRAINED WITH GRAIN
SIZE COARSENING STRILINGLY DOWNWARDS, PCES(1I,1J)
HAVE A FINE GABBROIC TEXTURE;
Structure : MASSIVE;
Comments : GREENISH-GREY;
Groundmass : PLAGIOCLASE
Size(mm): 3
PLAG LATHS ARE 3MM LONG AND IN PCE(1J) THEY ARE
7-8MM LONG;
OLIVINE
POSSIBLE ALTERED OL;
Replacement: PYROXENE
REPLACED BY AMPHIBOLE-CHLORITE(?);
CHLORITE
Minerals Replaced: PYX
ID UNCERTAIN FOR CHOLITE;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 254.00
Core: 30 Top of Core Depth (m) : 249.50
Sect: 3 Top of Section Depth(m): 252.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-16), 1B (17-25), 1C (24-32), 1D (31-38),
1E (38-45), 1F (45-54), 1G 955-61), 1H (62-71),
1I (75-85), 1J (83-95), 1K (94-106), 1L (106-115),
1M (115-122), 1N (122-130), 1O (130-134),
1P (136-142), 1Q (144-147);
Texture : APHYRIC, VERY COARSE-GRAINED UNIFORMLY THROUGHOUT
ROCK;
Structure : MASSIVE;
Alteration : LIGHT TO MODERATE
PCES(1F-1G) ARE MOD ALTERED REST OF UNIT IS
SLIGHTLY ALTERED;
Comments : GREENISH-GREY, CONTINUOUS FROM 30-2;
Replacement: EPIDOTE
EVIDENCE FOR EPIDOTE(??)-HARD GRANULAR PISTACCHIO
GREEN MINERAL IN LOWER PCES(3.G. 1P);
SMECTITE
Minerals Replaced: PYX
TALC
Minerals Replaced: PYX
IN PCES(1F,1G,1H) THE PYROZENE IS COMPLETELY
REPLACED BY LARGE PATCHES OF A SOFT-GREASY(SOAP-
LIKE FEEL) GREEN-YELLOW MINERAL WHICH COULD BE
SMECTITE(?) OR TALC(?), THE PATCHES ARE UP TO
15MM WIDE AND PYRITE IS ASSOCIATED, THE YELLOW-
GREEN MINERAL IS MORE GREEN ANT ITS POSDER DOES
NOT FIZZ WITH HCL;
Leg : 65 Top/Bottom Interval(mm): 0/ 340 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 254.34
Core: 30 Top of Core Depth (m) : 249.50
Sect: 4 Top of Section Depth(m): 254.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-10), 1B (10-22), 1C (23-33);
Texture : APHYRIC, COARSE TO VERY COARSE-GRAINED;
Structure : MASSIVE, ALL PCES CUT BY SMECTITE-CALCITE-SULFIDE
VEIN;
Alteration : SLIGHTLY
SOME PYX CRYSTALS SHOWS ALTERATION TO AMPHIBOLE &
CHOLRITE(?)-GREENISH FIBROUS MATERIALS;
Comments : GREENISH-GREY, CONTINUATION OF UNIT IN CORE 30-3;
Groundmass : PLAGIOCLASE
Size(mm): 3-4
PLAG LATHS 3-4MM LONG;
Replacement: SMECTITE
GROUNDMASS HAS MANY SMECTITE PATCHES;
CALCITE
SULFIDE
Leg : 65 Top/Bottom Interval(mm): 0/1410 Analyst: Flower, M.
Hole: 485A Sample Midpoint (m) : 255.91
Core: 31 Top of Core Depth (m) : 254.50
Sect: 1 Top of Section Depth(m): 254.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (0-15), 1B 915-25), 1C (25-37), 1D (37-41),
1E (41-51), 1F (51-53), 1G (52-62), 1H (63-72),
1I (71-81), 1J (80-90), 1K (90-99), 1L (100-110),
1M (109-120), 1N (120-127), 1O (126-141);
Texture : APHYRIC, VERY COARSE-GRAINED, MICRO-DOLERITIC
TEXTURE, SOME GRANULAR AND OPHITIC AUGITE;
Structure : THICK GREEN SMECTITE VEIN IN PCE(1), SMECTITE IS
ALSO ON FRACTURE SURFACES;
Alteration : FRESHER THAN 30-4 BUT SOME PERVASIVE ALTERATION OF
SMECTITE;
Comments : GREY, CONTINUOUS FROM CORE 30;
Groundmass : PLAGIOCLASE
Size(mm): 1-2
PLAG LATHS 1-2MM IN LENGTH WITH GRANULAR (AND
SOMETIMES OPHITIC) AUGITE;
AUGITE
Replacement: SMECTITE
SMECTITE PATCHES MAY BE ALTERED OLIVINE AND SOME
PERVASIVE ALTERATON;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Flower, M.
Hole: 485A Sample Midpoint (m) : 257.50
Core: 31 Top of Core Depth (m) : 254.50
Sect: 2 Top of Section Depth(m): 256.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-17), 1B (17-30), 1C (30-41), 1D (39-52),
1E (52-64), 1F (54-75), 1G (75-87), 1H (86-94),
1I (92-103), 1J (102-110), 1K (110-116),
1L (116-123), 1M (124-132), 1N (132-142),
1O (142-150);
Texture : APHYRIC, COARSE-GRAINED, ONE PLAG PHENO OBSERVED IN
PCE(1N);
Structure : MASSIVE, ONE THICK(O.5CM) VEIN OF GREEN SMECTITE AND
SULFIDES;
Alteration : FRESH
PCES(1J,1N) ARE MODERATELY ALTERED;
Comments : CONTINUOUS FROM CORE 31-1;
Phenocrysts: PLAGIOCLASE
ONE PLAG PHENO OBSERVED IN PCE(1N)
Groundmass : CLINOPYROXENE
Replacement: SMECTITE
SULFIDE
Leg : 65 Top/Bottom Interval(mm): 0/1090 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 258.59
Core: 31 Top of Core Depth (m) : 254.50
Sect: 3 Top of Section Depth(m): 257.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-15), 1B 915-25), 1C 925-34), 1D (35-51),
1E (51-65), 1F (65-74), 1G (74-88), 1H (89-98),
1I (100-108);
Texture : APHYRIC, COARSE-GRAINED, SINGLE OBVIOUS 0.5CM PLAG
PHENOCRYST, LARGE (1-1.5CM) CRYSTALS OPHILTICALLY/
POIKILITICALLY ENCLOSING PLAG LATHS UP TO 5MM IN
LENGTH;
Structure : MASSIVE, SMECTITE FILLED FRACTURES IN UPPER PART AND
SMECTITE VEINLET N PCE(1C) ABOUT 2MM THICK, MOST
FRACTURES SUBHORIZONTAL;
Alteration : FRESH TO SLIGHT
PCES(1A-1E) ARE SLIGHTLY ALTERED WHILE REST OF
CORE IS NOT AS ALTERED;
Comments : CONTINUING FROM 31-2;
Leg : 65 Top/Bottom Interval(mm): 0/1440 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 260.44
Core: 32 Top of Core Depth (m) : 259.00
Sect: 1 Top of Section Depth(m): 259.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-12), 1B (13-20), 1C (20-25), 1D (25-39),
1E (40-46), 1F (47-60), 1G (60-75), 1H (75-85),
1I (85-97), 1J (97-107), 1K (108-117), 1L (118-131),
1M (131-144);
Texture : APHYRIC, COARSE-GRAINED;
Structure : 1MM THICK SLILCA VEIN IN PCES(1J-K), SMECTITE VEINS
IN PCES(1E,1G);
Comments : CONTINUING FROM 31-3(SEE IT FOR DESCRIPTION);
Groundmass : CLINOPYROXENE
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 262.00
Core: 32 Top of Core Depth (m) : 259.00
Sect: 2 Top of Section Depth(m): 260.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-10), 1B (10-23), 1C (24-40), 1D (41-50),
1E (53-69), 1F (69-80), 1G (81-98), 1H (100-113),
1I (114-130), 1J (130-150);
Texture : APHYRIC COARSE-GRAINED WITH SLIGHTLY DECREASING
GRAIN SIZE;
Structure : MASSIVE;
Comments : CONTINUING FROM 32-1;
Leg : 65 Top/Bottom Interval(mm): 0/1450 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 263.45
Core: 32 Top of Core Depth (m) : 259.00
Sect: 3 Top of Section Depth(m): 262.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (2-14), 1B (14-30), 1C (31-39), 1D (40-44),
1E (45-60), 1F (61-73), 1G (74-84), 1H (85-98),
1I (99-110), 1J (110-128), 1K (129-145);
Texture : APHYRIC, COARSE-GRAINED WITH DECREASING GRAIN SIZE,
SCATTERED ROUND PLAG MEGACRYSTS UP TO 1.3CM;
Structure : MASSIVE, SMEC FILLED SUBHORIZONTAL FRACTURES;
Comments : CONTINUING FROM 32-2;
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1450 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 264.95
Core: 32 Top of Core Depth (m) : 259.00
Sect: 4 Top of Section Depth(m): 263.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-20), 1B (20-40), 1C (40-54), 1D (55-61),
1E (61-75), 1F (75-94), 1G (95-111), 1H (111-122),
1I (123-131), 1J (131-150);
Texture : APHYRIC, GRAIN SIZE DECREASES NOTABLY TO MEDIUM TO
COARSE GRAINED, INCREASING AMOUNT OF PLAG PHENO-
MEGACRYSTS(<1%);
Structure : SMECTITE FILLED VEINLETS SUBHORIZONTAL;
Alteration : FRESH TO SLIGHT
PCES(1H-J) SLIGHTLY MORE ALTERED;
Comments : CONTINUING FROM 32-3;
Phenocrysts: PLAGIOCLASE ( <1%)
PLAG PHENOS-MEGACRYSTS;
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1400 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 266.40
Core: 32 Top of Core Depth (m) : 259.00
Sect: 5 Top of Section Depth(m): 265.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1-7), 1B (8-23), 1C (22-41), 1D (41-58),
1E (60-75), 1F (75-95), 1G (95-110), 1H (110-129),
1I (129-140);
Texture : APHYRIC, COARSE-GRAINED, HOLOCRYSTALLINE, VERY RARE
SINGLE PLAG PHENOCRYSTS, SOMETIMES LATHS OF PLAG
FORM GLOMEROPHYRIC AGGREGATES WITH CPX;
Structure : MASSIVE, FRACTURES VERY RARE-PCE(1H) AND FILLED WITH
SMECTITE;
Alteration : FRESH;
Comments : GREY, SAME UNIT AS ABOVE;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE
VERY RARE;
Groundmass : CLINOPYROXENE
PLAGIOCLASE
LATHS;
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/ 840 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 267.34
Core: 32 Top of Core Depth (m) : 259.00
Sect: 6 Top of Section Depth(m): 266.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (1018), 1B (17-27), 1C (27-35), 1D (36-51),
1E (52-70), 1F (71-81), 1G (81-84);
Texture : APHYRIC, COARSE-GRAINED, HOLOCRYSTALLINE, TRACE
PHENOS OF PLAG(3-5MM), GLOMEROPHYRIC AGGREGATES WITH
LATHS OF PLAG AND CPX;
Structure : MASSIVE, ROCK FRACTURED SLIGHTLY, FRACTURES THIN
(HAIRLINE) AND FILLED WITH SMECTITE;
Alteration : FRESH;
Comments : GREY, CONTINUING FROM 32-5;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( TR%)
Size(mm): 3-5
Groundmass : CLINOPYROXENE
PLAGIOCLASE
LATHS;
Replacement: SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 269.50
Core: 33 Top of Core Depth (m) : 268.00
Sect: 1 Top of Section Depth(m): 268.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : 1A (0-17), 1B (18-30), 1C (30-43), 1D (44-60),
1E (60-70), 1F (70-82), 1G (83-98), 1H (99-105),
1I (105-115), 1J (116-131), 1K (131-150);
Texture : SPARSELY PHYRIC, MEDIUM TO FINE-GRAINED WITH GRAIN
SIZE DECREASING DOWNWARDS;
Structure : MASSIVE, ABUNDANT SUBHORIZONTAL DISCONTINUOUS
FRACTURES IN UPPER HALF FILLED MOSTLY BY SMECTITE &
SOME ZEOLITE(?), THICKER 2MM SMECTITE VEIN IN PCE
(1K);
Alteration : FRESH TO SLIGHT
PCES(1A-1F) ARE SLIGHTLY ALTERED AND REST OF CORE
IS FRESH;
Comments : CONTINUING CORE FROM 32;
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): <5
SOME ROUNDED PLAG CRYSTALS UP TO 1CM;
OLIVINE ( <1%)
Size(mm): <5
BLACK OL(?) CRYSTALS ARE REPLACED BY DARK CLAY(?)
(PENTI%)
Size(mm): NE(?);
Replacement: SMECTITE
ZEOLITE
ID ZEOLITE UNCERTAIN;
SERPENTINITE
ID SERPENTINE UNCERAIN;
CLAY
ID DARK CLAY UNCERTAIN;
Leg : 65 Top/Bottom Interval(mm): 0/ 950 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 270.45
Core: 33 Top of Core Depth (m) : 268.00
Sect: 2 Top of Section Depth(m): 269.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-5), 1B (5-20), 1C (20-25), 1D (25-40),
1E (40-50), 1F (50-58), 1G (59-67), 1H (69-79),
1I (80-85), 1J (85-95);
Texture : SPARSELY PHYRIC, MEDIUM(TOP) TO VERY FINE-GRAINED
(BASE);
Structure : MASSIVE, RARE SMECTITE/CARBONATE VEINLETS;
Alteration : FRESH
GENERALLY;
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): TO 4
PLAG PHENOS BECOME SMALLER AND LESS ABUNDANT IN
THE BASAL 20CM;
OLIVINE ( 1%)
Size(mm): <3
OL PHENOS DECREASE STRONGLY IN ABUNDANCE IN LOWER
30CM, REPLACED BY BLACK SMECTITE(?) IN UPPER PART
BUT POSSIBLY SOME FRESH OL IN LOWER PART;
Replacement: SMECTITE
CARBONATE
Leg : 65 Top/Bottom Interval(mm): 960/1000 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 270.50
Core: 33 Top of Core Depth (m) : 268.00
Sect: 2 Top of Section Depth(m): 270.46
LITHOLOGY: SEDIMENT;
SOFT BROWN SILTSTONE;
Piece No. : PCE 2 (96-100);
Leg : 65 Top/Bottom Interval(mm): 0/ 500 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 277.50
Core: 34 Top of Core Depth (m) : 277.00
Sect: 1 Top of Section Depth(m): 277.00
LITHOLOGY: SEDIMENT;
CLAYTON-SILTSTONE BROWNISH BLACK;
Piece No. : PCE 1 (0-50);
Comments : 5YR2/1;
Leg : 65 Top/Bottom Interval(mm): 520/ 560 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 277.56
Core: 34 Top of Core Depth (m) : 277.00
Sect: 1 Top of Section Depth(m): 277.52
LITHOLOGY: CLAYSTONE-SLITSTONE AND APHYRIC BASALT;
Piece No. : PCES 2 (52-56);
Texture : APHYRIC, GLASSY MATRIX IS VERY ALTERED, VERY SMALL
QUENCH LATHS OF PLAG;
Alteration : FRESH
GENERALLY FRESH, GLASSY MATRIX IS VERY ALTERED;
Comments : DARK-GREY GLASSY BASALT, SEDIMENT SAME AS ABOVE OF
CONTACT;
Groundmass : PLAGIOCLASE
LATHS;
Leg : 65 Top/Bottom Interval(mm): 600/ 660 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 277.66
Core: 34 Top of Core Depth (m) : 277.00
Sect: 1 Top of Section Depth(m): 277.60
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 3A (60-67);
Texture : APHYRIC, VERY FINE-GRAINED(AT TOP OF PCES) TO FINE-
GRAINED, SINGLE MICROPHENO OF PLAG(0.5-1MM);
Structure : MASSIVE, FRACTURES FILLED WITH CALCITE(MAINLY) AND
SMECTITE AND PYRITE(RARE);
Comments : DARK-GREY;
Vesicles : Size(mm): Percent: 1-2
Location: TO 1 Filling: CLACITE, GLASS
VESICLES FILLED WITH CLACITE AND PARTLY OR
COMPLETELY WITH DARK MATERIAL-MAYBE GLASS(?);
Phenocrysts: PLAGIOCLASE
Size(mm): 0.5-1
SINGLE PLAG MICROPHENOS;
Replacement: CALCITE
PYRITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 670/1500 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 278.50
Core: 34 Top of Core Depth (m) : 277.00
Sect: 1 Top of Section Depth(m): 277.67
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 3B (67-75), 3C (75-83), 3D (83-92),
3E (93-102), 3F (103-112), 3G (112-122),
3H (124-133), 3I (134-140), 3J (140-150);
Texture : APHYRIC, FINE-GRAINED TO MEDIUM-GRAINED;
Structure : MASSIVE, STRONGLY FRACTURED AND FILLED WITH SMECTITE
AND CALCITE AND PYRITE(TR);
Comments : GREY, NEW COOLING UNIT, PETROGRAPHICALLY SIMILAR
TO ABOVE UNIT BUT COARSER-GRAINED AND FEWER VESICLES
AND MORE STRONGLY FRACTURED;
Vesicles : FEWER VESICLES THAN ABOVE;
Replacement: SMECTITE
CALCITE
PYRITE ( TR%)
PYRITE IS VERY RARE;
Leg : 65 Top/Bottom Interval(mm): 0/1050 Analyst: Zolotarev, B.
Hole: 485A Sample Midpoint (m) : 279.55
Core: 34 Top of Core Depth (m) : 277.00
Sect: 2 Top of Section Depth(m): 278.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-13), 2 (15-27), 3 (30-36), 4A (40-47),
4B (48-57), 4C (57-69), 4D (69-80), 4E (81-92),
4F (92-105);
Texture : APHYRIC, MEDIUM-GRAINED, GLOMEROPHYRIC AGGREGATES OF
PLAG LATHS;
Structure : MASSIVE, ROCK FRACTURED MODERATELY PCES(1,2,3,4A) &
FILLED WITH CARB AND SMEC AND TRACE PYRITE;
Alteration : SLIGHTLY;
Comments : SAME UNIT AS ABOVE, GREY, VERY SPARSELY PHYRIC AT
BOTTOM OF CORE;
Vesicles : Size(mm): 0.5-1 Percent:
Location: Filling: CALCITE,SMECTITE
VESICLES ARE FEW AND SMALL;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): 1-4
GLOMEROPHYRIC AGGREGATES OF PLAG LATHS;
Replacement: CARBONATE
SMECTITE
PYRITE ( TR%)
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 287.50
Core: 35 Top of Core Depth (m) : 286.00
Sect: 1 Top of Section Depth(m): 286.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-21), 1B (21-35), 1C (36-45), 1D (44-55),
1E (55-66), 1F (66-81), 1G (80-99), 1H (99-107),
1I (105-119), 1J (120-126), 1K (126-137),
1L (136-145), 1M (145-150);
Texture : SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED;
Structure : MASSIVE, VEIN OF CALCITE AND SMECTITE;
Comments : GREY;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMECTITE
LARGE 4MM IRREGULARLY SHAPED VESICLES IN PCE 1I
AND FILLED WITH CALCITE AND SMECTITE;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): 7-8
OLIVINE
MINOR ALTERED OL PHENOS;
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1480 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 288.98
Core: 35 Top of Core Depth (m) : 286.00
Sect: 2 Top of Section Depth(m): 287.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : 1A (0-22), 1B (22-31), 1C (30-40), 1D (40-55),
1E (54-67), 1F (67-71), 1G (71-90), 1H (90-106),
1I (96-107), 1J (107-120), 1K (119-137),
1L (128-139), 1M (138-145), 1N (146-148);
Texture : SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED;
Structure : MASSIVE, MORE EXTENSIVE VEINS OF CALCITE-SMECTITE;
Comments : GREY, SIMILAR TO 35-1;
Vesicles : LESS VESICULAR THAN 35-1;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): TO 10
OLIVINE
MINO ALTERED OL PHENOS;
Replacement: CALCITE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1480 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 290.48
Core: 35 Top of Core Depth (m) : 286.00
Sect: 3 Top of Section Depth(m): 289.00
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : 1A (0-10), 1B (1020), 1C (20-28), 1D (28-33),
1E (35-45), 1F (45-52), 1G (53-67), 2 (61-76),
3A(69-77), 3B (77-91), 3C (92-97), 3D (96-100),
3E (99-102), 3F (102-115), 3G (115-135),
3H (135-148);
Texture : SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED;
Structure : MASSIVE;
Comments : GREY, SIMILAR TO 35-2;
Leg : 65 Top/Bottom Interval(mm): 0/1490 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 291.99
Core: 35 Top of Core Depth (m) : 286.00
Sect: 4 Top of Section Depth(m): 290.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : 1A (1-7), 1B (7-15), 2A (17-31), 2B (32-49),
2C (50-66), 2D (66-76), 2E (76-85), 2F (86-91),
3A (94-104), 3B (104-149), 4A (115-130),
4B (131-143), 4C (143-149);
Texture : SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED, OLIVINE IS
EUHEDRAL;
Structure : MASSIVE;
Comments : GREY, SIMILAR TO 35-3;
Phenocrysts: PLAGIOCLASE
OLIVINE
Size(mm): 1
OL APPEARS ALTERED AND MORE ABUNDANT THAN IN
PREVIOUS CORES, OL PHENOS ARE EUHEDRAL;
PYROXENE
ONE PYX PHENO ASSOCIATED WITH PLAG PHENOS;
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 292.00
Core: 35 Top of Core Depth (m) : 286.00
Sect: 4 Top of Section Depth(m): 290.50
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-13), 1B (13-25), 1C (25-31), 1D (32-41),
1E (42-48), 2 (51-65), 3A (67-80), 3B (80-89),
3C (89-93), 3D (94-103), 3E (104-113), 3F (115-121),
3G (120-128), 3H (29-132), 3I (133-142),
3J (142-150);
Texture : SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED AND BECOMES
FINE-GRAINED IN LOWER CORE;
Structure : MASSIVE;
Comments : GREY;
Leg : 65 Top/Bottom Interval(mm): 0/ 550 Analyst: Kudo, A.
Hole: 485A Sample Midpoint (m) : 294.05
Core: 35 Top of Core Depth (m) : 286.00
Sect: 6 Top of Section Depth(m): 293.50
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-10), 1B (10-21), 1C (22-30), 1D (31-40),
1E (40-52), 1F (53-55);
Texture : PHYRIC, FINE-GRAINED;
Structure : MASSIVE;
Comments : GREY, SIMILAR TO 35-4 BUT WITH LESSER AMOUNTS OF
PHENOS AND FINER-GRAIN SIZE;
Leg : 65 Top/Bottom Interval(mm): 0/ 630 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 298.63
Core: 36 Top of Core Depth (m) : 295.00
Sect: 3 Top of Section Depth(m): 298.00
LITHOLOGY: SEDIMENT;
MUDSTONE;
Piece No. : PCE 1 (0-63);
Leg : 65 Top/Bottom Interval(mm): 640/ 700 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 298.70
Core: 36 Top of Core Depth (m) : 295.00
Sect: 3 Top of Section Depth(m): 298.64
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 2 (64-70);
Texture : VERY FINE-GRAINED, LIGHT COLORED MARGIN OF
DEVITRIFIED GLASS, APHYRIC;
APHYRIC, FINE-GRAINED;
Comments : DEVITRIFIED GLASS COATED AT BASE BY VERY HARD
(BAKED?) CALCAREOUS DARK MUDSTONE WITH PYRITE
LENSES, SINCE COOLING MARGIN WOULD BE EXPECTED
AGAINST OVERLYING SEDIMENT THE PCE MIGHT BE UPSIDE
DOWN BUT UPPER COOLING MARGIN MAYBE FORMING, FORM OF
CONTACT PARTLY IRREGULAR AND STEEP;
Replacement: PYRITE
Leg : 65 Top/Bottom Interval(mm): 0/ 320 Analyst: Schmincke, H.
Hole: 485A Sample Midpoint (m) : 299.03
Core: 36 Top of Core Depth (m) : 295.00
Sect: CC Top of Section Depth(m): 298.81
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (1-15), 2 (6-16), 3 (20-24), 4A (28-31),
4B (29-32);
Texture : SPARSELY PHYRIC, FINE-GRAINED, SOME CHILLED MARGINS
OF DEVITRIFIES GLASS;
Comments : SULFIDE AND CALCITE FILLING VEINS;
PROBABLY PART OF A COMPLEX LITTLE BASALT COOLING
UNIT THAT APPEARS TO BE A THIN STRING OF BASALT THAT
MAY HAVE INVADED(?) SEDIMENT;
Vesicles : VUGS FILLED WITH CALCITE AND SULFIDE;
Phenocrysts: PLAGIOCLASE ( TO 3%)
Size(mm): <3
SOME LARGER ROUNDED PHENOS OF CA. 6MM;
Replacement: CALCITE
SULFIDE
Leg : 65 Top/Bottom Interval(mm): 0/1490 Analyst: Flower, M.
Hole: 485A Sample Midpoint (m) : 315.99
Core: 38 Top of Core Depth (m) : 313.00
Sect: 2 Top of Section Depth(m): 314.50
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
Piece No. : PCES 1 (0-6), 2 (8-11), 3 (12-16), 4 (17-20),
5 (22-30), 6A (32-38), 6B (40-48), 6C (46-60),
6D (60-70), 7A (71-77), 7B (78-88), 7C (89-100),
8A (103-118), 8B (118-127), 8C (126-141),
8D (141-149);
Texture : PCE 1 HAS CONTACT MARKED BY THIN(102MM) OF GLASS
FREGMENTS NEXT TO 1MM MOST INDURATED SEDIMENT, REST
OF PCE IS A CONVOLUTED ASSOCIATION OF FINE-GRAINED
BASALT AND CARB AND SULFIDE AND SMECTITE AND
CHALCEDONY(?), PCE(2) HAS GLASSY RIMS AND PCES(3,4)
HAVE ZONING OF SILICA AND CARB AND SMECTITE, PCE(5)
IS VERY FINE-GRAINED AND PHYRIC, PCES(6A-C) ARE
FINE-GRAINED(WITH OCCASIONAL FINER-GRAINED
SEGREGATION) AND MOD PHYRIC, PCES(6D-8D) HAVE
SLIGHTLY INCREASED GRAIN-SIZE AND ARE MOD PHYRIC;
Structure : PCE(2) HAS VEINS OF CARB/SANDSTONE, PCES(3,4) HAVE A
SIMILAR COMPLEX VEIN PATTERN, PCE(5) HAS CARB
COATING VEIN;
Alteration : MOD
PCES (1-4);
SLIGHT
PCES(6A-C,7A-B);
FRESH
PCES (6D,7C,8A-D);
Comments : THIS SECTION REPRESENTS THE UPPER CONTACT WITH
SEDIMENT OF A NEW REPLACEMENT UNIT-CONTACT ZONE
PCES(1-5), PCE (1) IS SEDIMENT-BASALT CONTACT WITH
SEDIMENT .5-1CM THICK AND VERY HARD AT CONTACT
(1MM)-DUE TO CONCENTRATION/BAKING(?), PCE(2) HAS NO
SEDIMENT BUT IS OTHERWISE SIMILAR TO PCE(1), PCES
(6D-8D) ARE SIMILAR TO PCES(6A-6C);
Vesicles : PCE(2) HAS VUGS WITH CARB, PCES(6A-C) HAVE SMEC
AMYGDULES(<2MM);
Phenocrysts: PLAGIOCLASE ( TO 5%)
Size(mm): TO 10
PLAG PHENOS IN PCES(6A-D) ARE UP TO 10MM & AROUND
5%, ALSO SOME PLAG PHENOS IN PCE(5);
Replacement: SULFIDE
NOTED ON SEDIMENT SUFACE;
CARBONATE
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Flower, M.
Hole: 485A Sample Midpoint (m) : 317.50
Core: 38 Top of Core Depth (m) : 313.00
Sect: 3 Top of Section Depth(m): 316.00
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-6), 1B (7-15), 1C (17-30), 1D (30-41),
1E (40-55), 2A (56-68), 2B (67-76), 2C (76-87),
3A (89-97), 3B (97-104), 3C (103-111), 3D (112-117),
3E (119-130), 3F (132-149);
Texture : PHYRIC;
Structure : MASSIVE, CARB VEIN IN PCES(1B,2B,3A);
Alteration : FESH
FRESH EXCEPT FOR PCES(1B,2B) WHICH ARE MODERATELY
ALTERED;
Comments : CONTINUING BASALT FROM 38-2;
Vesicles : SMECTITE AMYGDULES IN PCES(1A-D);
Phenocrysts: PLAGIOCLASE
Size(mm): TO 10
MORE ABUNDANT(?) IN PCES (1C-E);
Replacement:
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Flower, M.
Hole: 485A Sample Midpoint (m) : 319.00
Core: 38 Top of Core Depth (m) : 313.00
Sect: 4 Top of Section Depth(m): 317.50
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (0-14), 2A (15-22), 2B (23-36), 3 (38-48),
4 (50-64), 5 (65-84), 6 (85-99), 7 (100-114),
8A (116-122), 8B (122-130), 8C (131-145),
8D (145-150);
Texture : PHYRIC, MEDIUM-GRAIN SIZE AND SOME PLAG
GLOMEROCRYSTIC CLOTS;
Structure : MASSIVE, CARB VEINING IN PCES(2A,8C);
Alteration : FRESH
FRESH EXCEPT FOR PCE(2A);
Comments : CONTINUED LITHOLOGY FROM CORE 38-3, PCE(8C) FITS
PCE(1) UNIT 38-5;
Phenocrysts: PLAGIOCLASE
SOME PLAG GLOMEROCRYSTIC CLOTS;
Replacement: CARBONATE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 320.50
Core: 38 Top of Core Depth (m) : 313.00
Sect: 5 Top of Section Depth(m): 319.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (0-14), 2A (16-20), 2B (20-28), 2C (29-46),
3 (48-60), 4A (61-70), 4B (70-77), 5 (79-84),
6A (86-97), 6B (98-105), 6C (104-107), 6D (109-116),
7 (68-73), 8A (125-131), 8B (131-141), 8C (140-150);
Texture : SPARSELY PHYRIC, GLOMEROCRYSTS OF PYX WITH PLAG;
Structure : MASSIVE, VEINS OF SMEC AND CALCITE WITH TRACE
SULFIDES ALSO THIN DISCONTINUOUS SMECTITE VEINS IN
PCES(4A,2C,8A);
Alteration : FRESH
ROCK GENERALLY APPEARS FRESH;
Comments : CONTINUATION OF UNIT IN 38-4, VIAL OF VEIN MATERIAL
PCE(2B);
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): 2-4
PYROXENE ( TR%)
GRACE PYX IN GLOMEROCRYSTS WITH PLAG;
Replacement: SMECTITE
CALCITE
SULFIDES
Leg : 65 Top/Bottom Interval(mm): 0/ 710 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 321.21
Core: 38 Top of Core Depth (m) : 313.00
Sect: 6 Top of Section Depth(m): 320.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (0-14), 2 (17-26), 3A (27-38), 3B (38-50),
3C (50-61), 3D (62-71);
Texture : SPARSELY PHYRIC, GRAIN SIZE COARSENS SLIGHTLY FROM
PCES(1-3D);
Structure : MASSIVE, VEINS IN PCE(3C) ARE OF SMEC AND CALCITE;
Alteration : FRESH
ROCK APPEARS FRESH BUT HAS TRACE GNDMSS CALCITE
AND GREEN MINERAL;
Comments : CONTINUATION OF UNIT 38-5;
Vesicles : Size(mm): Percent: <<1
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): 3-5
PCE(3A) HAS 10MM LONG PHENOS BUT USUALLY 3-5MM;
Replacement: CALCITE
CALCITE PRESENT IN GNDMSS;
SMECTITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 323.50
Core: 39 Top of Core Depth (m) : 322.00
Sect: 1 Top of Section Depth(m): 322.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-13), 1B (11-24), 1C (24-31), 1D (30-37),
1E (38-44), 1F (44-51), 1G (50-61), 1H (59-72),
1I (71-82), 1J (81-92), 1K (93-105), 1L (105-116),
1M (115-128), 1N (127-140), 1O (140-149);
Texture : COARSE TO MEDIUM-GRAINED, SPARSELY PHYRIC;
Structure : MASSIVE, VEINS OF CALCITE AND SMECTITE OCCUR IN
PCE(1B-3,1F-G,1L) WHERE CALCITE IS SUBORDINATE TO
SMECTITE AND ONLY A TRACE OF SULFIDES ARE OBSERVED;
Alteration : FRESH
GENERALLY FRESH EXCEPT FOR PCES(1A-3,1M,1O) WHICH
ARE SLIGHTLY ALTERED, PCE(1M) HAS SMECTITE N
GROUNDMASS(TRACE SULFIDES?) WITH SOME PATCHES 5MM
ACROSS, SOME PERVASIVE ALTERATION IN PCES(1A-D)
ALSO;
Comments : GREY, NOT A DIRECT CONTINUATION OF CORE 38-6 AS
GRAIN SIZE IS DISTINCTLY COARSER;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: SMECTITE
VESICLES IRREGULARLY DISTRIBUTED WITH PCES(1A-C)
CONTAINING SEVERAL 1-2MM VESICLES AND REST OF CORE
HAS RARE VESICLES;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): TO 8
SOME PLAG PHENOS CONTAIN SMALL INCLUSION OF DARK
MINERAL(SPINEL?);
SPINEL
ID SPENEL UNCERTIAN
Replacement: SMECTITE
SULFIDE
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1460 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 324.96
Core: 39 Top of Core Depth (m) : 322.00
Sect: 2 Top of Section Depth(m): 323.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (1-6), 2 (7-20), 3A (22-32), 3B (34-41),
4 (43-47), 5 (50-56), 6A (56-70), 6B (70-80),
7A (82-93), 7B (92-102), 7C (100-113), 7D (112-118),
7E (115-120), 7F (125-135), 8 (136-146);
Texture : SPARSELY PHYRIC, COARSE GRAINED WITH GRAIN SIZE
COARSENING GRADUALLY FROM 39-1 PCE(1A) DOWN THROUGH
39-2;
Structure : MASSIVE, VEINS OF SMEC AND CALCITE WITH SCARCE
SULFIDES, VEIN IN PCE(3A) IS 5MM WIDE WITH DIFFUSE
ALTERATION HALO 1-3MM WIDE;
Alteration : SLIGHTLY
SLIGHT PERVASIVE ALTERATION SHOWN IN PCES(2,3,4,
7C-F) WITH GROWTH OF SMEC IN GNDMSS;
Comments : CONTINUATION OF UNIT IN 39-1;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): TO 8
ALSO SOME RARE GLOMEROCRYSTS;
Replacement: SMECTITE
SOME GROWTH OF SMECTITE IN GRNDMSS;
SULFIDES
SCARECE;
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 326.50
Core: 39 Top of Core Depth (m) : 322.00
Sect: 3 Top of Section Depth(m): 325.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-10), 1B (9-17), 1C 917-27), 1D (26-35),
2A (38-50), 2B (50-57), 3A (60-65), 3B (65-72),
3C (72-80), 4 (81-90), 5 (92-97), 6 (100-107),
7 (110-117), 8A (120-127), 8B (127-134),
8C (135-143), 8D (524-150);
Texture : SPARSELY PHYRIC, COARSE-GRAINED;
Structure : MASSIVE, VEINS OF SMEC AND CALCITE WITH TRACE
SULFIDES;
Alteration : SLIGHTLY
PATCHY SLIGHT ALTERATION;
Comments : CONTINUATION OF NIT IN 39-2, PCE(1A) FITS WITH 39-2
PCE(8A) AND PCE(8D) WITH PCE(1) 39-4;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): TO 1
PLAG PHENOS ARE IRREGULARLY DISTRIBUTED, PCE(2A),
HAS 1-2% OTHERS HAVE <1% PHENOS;
SPINEL
SOME PLAG PHENOS HAVE SMALL SPINEL INCLUSIONS;
Replacement: SMECTITE
THERE IS GROWTH OF SMECTITE IN GNDMSS PARTICULARLY
CLOSE TO VEINS AND IN PCE(4) WHERE GRNDMSS
SULFIDES ALSO OCCUR;
SULFIDE
ALSO OCCURS IN GNDMSS;
CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/1500 Analyst: Flower, M.
Hole: 485A Sample Midpoint (m) : 328.00
Core: 39 Top of Core Depth (m) : 322.00
Sect: 4 Top of Section Depth(m): 326.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (0-7), 1B (8-17), 2 (20-26), 3 (26-36),
4 (37-46), 5 (49-55), 6 (56-66), 7 (68-76),
8 (78-87), 9A (88-91), 9B (97-108), 9C (97-108),
9D (109-113), 9E (117-124), 9F (124-126),
10 (126-133), 11 (134-141), 12 (143-150);
Texture : SPARSELY PHYRIC;
Structure : MASSIVE, OCASIONAL FINE CALCITE VEINS;
Alteration : FRESH
PCES(1B,9A) SHOW SLIGHT ALTERATION;
Comments : PCE(1A) FITS WITH END OF CORE 39-3, CONTINUOUS
MASSIVE BASALT;
Phenocrysts: PLAGIOCLASE
Replacement: CALCITE
Leg : 65 Top/Bottom Interval(mm): 0/ 510 Analyst: Morrison, M. Ann
Hole: 485A Sample Midpoint (m) : 328.51
Core: 39 Top of Core Depth (m) : 322.00
Sect: 5 Top of Section Depth(m): 328.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1 (0-10), 2A (13-15), 2B (15-21), 3 (24-36),
4 (37-43), 5 (44-51);
Structure : SPARSELY PHYRIC;
MASSIVE, PCES(1,2A) HAVE THIN VEINS OF SMECTITE AND
CALCITE AND TRACE SULFIDES;
Alteration : FRESH
PCES(1,2) SHOW SLIGHT ALTERATION;
Comments : APPEARS TO BE CONTINUATION OF SECTIONS 39-1 THRU
39-4;
Vesicles : Size(mm): Percent: 0
NONE OBVIOUS;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): TO 1
SPINEL
SOME SMALL SPINEL INCLUSIONS IN PLAG PHENOS;
Replacement: SMECTITE
SLIGHT PATCHY GROWTH OF SMEC IN GRNDMSS;
CALCITE
SULFIDES
Size(mm): TR
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