Leg : 37 Top/Bottom Interval(mm): 0/ 550 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 255.05
Core: 15 Top of Core Depth (m) : 253.00
Sect: 2 Top of Section Depth(m): 254.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT
SIMILAR LITHOLOGY TO 16-1;
Piece No. : PCES 1 (4-9), 2 (12-19), 3 (21-25), 4 (27-32),
5 (33-49), 6 (41-47), 7 (50-54);
Texture : MOD PHYRIC, TOP QUENCHED BUT GLASSY PORTION FLAKED
OFF BEFORE OR DURING DRILLING,PCE 4 HAS AN
APHANITIC MATRIX WITH SOME PLAG MICROLITES, BLACK
SOOTY SPOTS ON CARB COATING ARE PROBABLY FE-MN
HYDROUS OXIDE, APHANITIC-QUENCHED GNDMASS;
Comments : START OF TOP OF ACOUSTIC BASEMENT, PCE 2 HAS A
YELLOWISH COATING ON ONE SIDE WITH BLACK FE-MN
OXIDE SPOTS;
Phenocrysts: COMBINATION ( 5-10%)
INCLUDING PLAG+OL, ABUNDANCE PLAG>OL;
PLAGIOCLASE
IN PCE 4 PLAG MICROLITES;
Groundmass : APHANITIC;
Replacement: CARBONATE
COATING;
FERROUS MN OXIDE
BLACK FE-MN OXIDE SPOTS ON CARB;
Vesicles : Size(mm): Percent: 3
VESICULAR;
Leg : 37 Top/Bottom Interval(mm): 0/1400 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 263.90
Core: 16 Top of Core Depth (m) : 262.50
Sect: 1 Top of Section Depth(m): 262.50
LITHOLOGY: PLAG-OL-PYX MOD PHYRIC BASALT;
Piece No. : PCES 1 (2-8), 2 (10-25), 3 (28-31), 4 (34-41),
5 (44-49), 6(52-60), 7 (62-67), 8 (70-74),
9 (77-81), 10 (84-89), 11 (91-106), 12 (109-114),
13 (116-138);
Structure : CARB FILLED FRACTURES, MOST PRONOUNCED ONE IS
IRREGULAR AND VERTICAL IN PCE 2, INTERSECTING
FRACTURES ARE SUB-HORIZONTAL;
Texture : MOD PHYRIC, PCE 1 IS MORE COARSELY XTLN THAN CORE
15-2 BASALTS BUT STILL VERY FIND-GRAINED, PCE 3 IS
SIMILAR TO PCE 1 AND CORE 15-2, INCLUDES A GLASSY
RIND WITH CARB COATING, PCES 4+5+13 ARE SIMILAR
TO PCE 2 BUT GNDMASS IN PCE 5 IS SLIGHTLY FINER-
GRAINED, PCES 6-11 ARE SIMILAR TO PCE 5, PCE 12
IS LIKE PCE 3 BUT VERY LITTLE GLASS LEFT;
Alteration : BUFF WEATHERED ZONE SURROUNDS EACH FRACTURE-
INFILTRATION HALMYROLYSIS;
Comments : FE-MN OXIDE COATING ON ONE SURFACE OF PCE 1, WITH
POSSIBLE WHITE ORGANIC FOSSIL ATTACHMENTS;
Vesicles : Size(mm): <2 Percent: <3
DENSE;
Size(mm): Percent: 5
PCE 5,WITH BLUISH GRAY VESICLE COATING, PCES
6-11 ARE SIMILAR;
Phenocrysts: COMBINATION ( 10%)
Size(mm): TO 4
IN PCE 2, INCLUDES PLAG+OL AND VERY RARE PYX,
PLAG IN GREATEST AMOUNT, MOST PHENOS <4MM, PYX
PHENOS ARE VERY SMALL,PYX PHENOS ARE A MORE DARK
GREEN THAN OL, BUT NOT THE BRILLIANT EMERALD GREEN
TYPE, PCE 4 IS SIMILAR TO PCE 2, PCES 5-11 HAVE
FEWER PHENOS THAN PCE 2;
COMBINATION ( 5%)
IN PCE 3, INCLUDES PLAG+OL+PYX, RELATIVE AMOUNTS
PLAG>OL>PYX;
Replacement: CARBONATE
FILLING FRACTURES AND COATING;
FERROUS MN OXIDE
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 265.50
Core: 16 Top of Core Depth (m) : 262.50
Sect: 2 Top of Section Depth(m): 264.00
LITHOLOGY: PLAG-OL-PYX MOD PHYRIC BASALT;
SIMILAR TO PCE 2 OF 16-1;
Piece No. : PCES 1 (4-12), 2, (15-20), 3(24-27), 4 (30-37),
5 (37-42), 6(45-50), 7 (52-57), 8 (60-65),
9 (67-73), 10 (76-93), 11 (95-101), 12 (104-124),
13 (125-139), 14 (140-148);
Texture : ALL PCES SIMILAR TO PCE 2 OF 16-1 EXCEPT FOR NOTED
DIFFERENCES IN VESICULARITY, PHENOS, AND GNDMASS
TEXTURE, PCE 8 IS COARSER GRAINED THAN ABOVE BUT
STILL QUITE FINE GRAINED, PCE 10 ALSO HAS A
COARSER GRAINED GNDMASS BUT STILL FINE-GRAINED;
Vesicles : Size(mm): Percent: 5
Location: Filling: CARB
VESICULAR, CARB FILLING IN PCE 8;
Phenocrysts: PLAGIOCLASE ( 5-8%)
IN PCE 8;
PYROXENE ( RARE%)
TRACE OF GREEN PYX IN PCE 8;
OLIVINE ( 0%)
NO OL NOTED IN PCE 8;
Replacement: CARBONATE
FILLING VESICLES IN PCE 8;
Leg : 37 Top/Bottom Interval(mm): 0/ 900 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 266.40
Core: 16 Top of Core Depth (m) : 262.50
Sect: 3 Top of Section Depth(m): 265.50
LITHOLOGY: PLAG-PYX MOD PHYRIC BASALT;
MOSTLY SIMILAR TO PCE 10 OF CORE 16-2;
Piece No. : PCES 1 (3-11), 2A (14-23), 2B (22-33), 2C (34-46),
3A (50-61), 3B (61-70), 3C (70-78), 4(82-87);
Texture : PCES 1+2+3B SAME AS PCE 10 OF 16-2, PCE 3 IS
FRAGMENTED, PCE 4 IS FINER-GRAINED THAN PCE 10
OF 16-2, PCE 3A IS HOLOXTLN BUT FINE-GRAINED
GNDMASS, PROBABLY INTERGRANULAR TEXTURE;
Alteration : INFILTRATION WEATHERING ALONG ONE SIDE;
Phenocrysts: COMBINATION ( 10%)
IN PCE 3A, INCLUDES MOSTLY PLAG AND MINOR EMERALD
GREEN PYX, NO OL NOTED, PLAG PROBABLY SUBOPHITIC
WITH PYX IN PLACES;
Alteration : INFILTRATION WEATHERING ALONG ONE SIDE;
Comments : CONTINUOUS UNIT FROM 16-2, UNIT 1 ENDS AT 90CM;
Leg : 37 Top/Bottom Interval(mm): 900/1410 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 266.91
Core: 16 Top of Core Depth (m) : 262.50
Sect: 3 Top of Section Depth(m): 266.40
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 5 (90-97), 6(100-108), 7 (111-114),
8 (118-122), 9 (126-130), 10 (134-138);
Structure : FRACTURES LINED WITH CALCITE AND SOME SILICA(?),
CALCITE HAS ABUNDANT OPAQUES;
Texture : APHYRIC, GNDMASS CRYSTALS CLEARLY VISIBLE, MEDIUM
GRAINED;
Comments : RED CALCITE COATING IN PCE 5, CALCITE COATINGS WITH
ABUNDANT OP.MINS IN PCE 8;
Vesicles : Size(mm): Percent: RARE
RARE SMALL VESICLES LINED WITH SMEC AND CALCITE;
Groundmass : OLIVINE
SOME OL, QUESTIONABLE;
Replacement: CALCITE
IN FRACTURES AND VESICLES;
OPAQUE MINERALS
WITH CALCITE IN FRACTURES;
SMECTITE
IN VESICLES;
Leg : 37 Top/Bottom Interval(mm): 0/1490 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 268.49
Core: 16 Top of Core Depth (m) : 262.50
Sect: 4 Top of Section Depth(m): 267.00
LITHOLOGY: PLAG-OL-AUGITE MICROPHYRIC BASALT;
Piece No. : PCES 1 (13-15), 2 (20-25), 3 (29-37), 4 (40-44),
5 (49-50), 6 (54-55), 7A (59-64), 7B (65-72),
7C (71-100), 73 (100-113), 8 (118-121),
9 (125-130), 10 (115-145);
Structure : CALCITE VEINLET OR RECRYSTALLIZED OOZE IN PCE 3,
RECRYSTALLIZED CARB SEDIMENT VEIN AT TOP OF 7A,
PCE 7 IS MASSIVE;
Texture : MICROPHYRIC, PCE 7 IS FINE-GRAINED, NOT APHANITIC;
Vesicles :
Location: Filling: SMEC
SMALL SMEC LINED VESICLES IN PCE 1, SIMILAR IN
PCES 2-6;
Size(mm): <1 Percent: <2
DENSE, PCE 7, PCES BELOW ARE SIMILAR, VESICLES
ARE LARGER AND SOMEWHAT MORE ABUNDANT TOWARD TOP
OF THIS SECTION;
Phenocrysts: PLAGIOCLASE ( <<1%)
MICROPHENOS;
OLIVINE ( RARE%)
MICROPHENOS IN PCE 3;
AUGITE
GREEN AUGITE MICROPHENOS IN PCE 3;
Groundmass : OLIVINE
ABUNDANT OL?, PROBABLY STAINED FELDSPAR, PATCHES
OF SMALL CRYSTALS OF OL(?) IN 7A;
Replacement: SMECTITE
LINING VESICLES;
Leg : 37 Top/Bottom Interval(mm): 0/ 380 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 268.88
Core: 16 Top of Core Depth (m) : 262.50
Sect: 5 Top of Section Depth(m): 268.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (4-10), 2 (13-25), 3 (27-38);
Texture : APHYRIC, PCES 1+2 ARE MEDIUM-GRAINED, PCE 3 IS FINE-
GRAINED BUT MAINLY HOLOXTLN, PLAG MICROLITES IN
MATRIX OF GRANULAR PYX;
Comments : BASALT LIGHT GRAY IN PCE 1, BROWN RECRYSTALLIZED
SEDIMENT AT TOP OF PCE 1;
Vesicles : Size(mm): Percent: 5
Location: Filling: CARB
IN PCES 1+2, SMALL CARB FILLED VESICLES,
SOME OPEN;
Size(mm): Percent: 10
Location: Filling: CARB
IN PCE 3, MAINLY CARB FILLED;
Groundmass : OLIVINE
IN PCES 1+2, QUESTIONABLE;
PYROXENE
IN PCE 3, GRANULAR PYX;
Replacement: CARBONATE
FILLING VESICLES;
Leg : 37 Top/Bottom Interval(mm): 380/ 600 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 269.10
Core: 16 Top of Core Depth (m) : 262.50
Sect: 5 Top of Section Depth(m): 268.88
LITHOLOGY: SEDIMENT;
Piece No. : PCES 4 (42-44), 5 (48-52), 6 (56-60);
Comments : IN PCES 5+6 SEDIMENT WITH MINOR GLASS AND PALAG;
Leg : 37 Top/Bottom Interval(mm): 600/ 920 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 269.42
Core: 16 Top of Core Depth (m) : 262.50
Sect: 5 Top of Section Depth(m): 269.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 7 (63-66), 8 (70-77), 9 (80-92);
Structure : DENSE, SOME LARGE IRREGULAR GAS CAVITIES;
Texture : APHYRIC, VERY SPARSE PLAG PHENOS, RECRYSTALLIZED
CARB ON ONE SURFACE OF PCE 9, VERY FINE-GRAINED;
Alteration : PCE 7 HAS SOME BROWN STAINING;
Comments : PCE 8 HAS TAN SEDIMENT ENCRUSTED WITH GLASS AND
PALAG;
Vesicles : Size(mm): Percent: 3
TOP OF SECTION IS MORE VESICULAR;
Phenocrysts: PLAGIOCLASE ( <<1%)
Groundmass : PALAG INCLUSION;
Replacement: PALAGONITE
CARBONATE
Leg : 37 Top/Bottom Interval(mm): 0/1430 Analyst: Robinson, P.T.
Hole: 334 Sample Midpoint (m) : 273.43
Core: 17 Top of Core Depth (m) : 272.00
Sect: 1 Top of Section Depth(m): 272.00
LITHOLOGY: APHYRIC BASALT;
SAME APHANITIC BASALT AS IN 16-4 AND 16-5;
Piece No. : PCES 1 (3-5), 2 (10-21), 3 (25-38), 4 (40-45),
5 (48-55), 6 (59-63), 7 (66-71), 8 (75-85),
9 (88-101), 10 (104-120), 11 (123-132),
12 (135-153);
Structure : SILICA(?) ON FRACTURES IN PCE 2, IN PCE 10 FRACTURE
COATED WITH BLUE SMEC AND WHITE NON-CARB WITH
ABUNDANT OP.MINS;
Texture : APHYRIC, WITH RARE PLAG MICROPHENOS, GLASS RIND ON
PCES 1+2;
Vesicles :
Location: Filling: SMEC
SMALL VESICLES LINED WITH BLUE SMEC IN PCE 8;
Phenocrysts: PLAGIOCLASE ( RARE%)
MICROPHENOS;
Groundmass : OLIVINE
OL UNCERTAIN, ALTERED AND FRESH IN PCE 8;
Replacement: SMECTITE
BLUE SMEC LINING VESICLES AND FRACTURE;
OPAQUE MINERALS
ABUNDANT IN FRACTURE IN PCE 10;
Leg : 37 Top/Bottom Interval(mm): 0/1450 Analyst: Robinson, P.T.
Hole: 334 Sample Midpoint (m) : 274.95
Core: 17 Top of Core Depth (m) : 272.00
Sect: 2 Top of Section Depth(m): 273.50
LITHOLOGY: APHYRIC BASALT;
SAME AS CORE 17-1;
Piece No. : PCES NO PCE NUMBERS ASSIGNED;
Structure : FRACTURES WITH SOFT WHITE COATING IN A NUMBER OF
PCES, CALCITE VEINLETS IN TWO PCES;
Texture : APHYRIC, SOME PCES WITH GLASS RINDS, RARE PLAG
CRYSTAL IN BOTTOM PCE;
Alteration : SOME PCES WITH BROWN STAINING;
Comments : CONTINUOUS UNIT FROM 17-1;
Groundmass : OLIVINE
OL UNCERTAIN, PRESENT THROUGHOUT BUT IN VARIABLE
QUANTITIES, POSSIBLY STAINED FELDSPAR;
Replacement: CALCITE
CALCITE IN FRACTURES AND VEINS;
Leg : 37 Top/Bottom Interval(mm): 0/1280 Analyst: Robinson, P.T.
Hole: 334 Sample Midpoint (m) : 276.28
Core: 17 Top of Core Depth (m) : 272.00
Sect: 3 Top of Section Depth(m): 275.00
LITHOLOGY: APHYRIC BASALT;
SAME AS CORE 17-2;
Piece No. : PCES 1 (3-15), 2 (20-22), 3 (26-37), 4 (41-51),
5 (54-61), 6(65-72), 7 (75-88), 8 (90-106),
9 (109-115), 10(119-125);
Structure : SMALL VUGS WITH SILICA(?) AND CALCITE VEIN IN PCE 1,
CALCITE LINED FRACTURE IN PCE 2;
Texture : APHYRIC, PLAG CRYSTAL IN PCE 5;
Alteration : BROWNISH-ORANGE SPOTS IN WEATHERED AREAS, YELLOW-
GREEN SPOTS IN FRESHER AREAS, ALTERATION IN PCE 4,
BROWN STAINING IN PCES 2-4;
Comments : CONTINUOUS UNIT FROM 17-2, WHITE COATING IN PCE 4-
SILICA(?);
Vesicles :
Location: Filling: SMEC
SMALL VESICLES LINED WITH BLUE SMEC IN PCES 5+9,
LINED WITH YELLOW SMEC IN PCE 8;
Groundmass : OLIVINE
OL MAY BE STAINED PLAG BECAUSE IT APPEARS TO BE
ABSENT IN FRESH AREAS AWAY FROM ALTERATION ZONES;
Replacement: SMECTITE
YELLOW AND BLUE, IN FRACTURES AND VESICLES;
CALCITE
IN VEINS;
Leg : 37 Top/Bottom Interval(mm): 0/1450 Analyst: Robinson, P.T.
Hole: 334 Sample Midpoint (m) : 282.95
Core: 18 Top of Core Depth (m) : 281.50
Sect: 1 Top of Section Depth(m): 281.50
LITHOLOGY: APHYRIC BASALT;
SAME AS CORE 17-3;
Piece No. : PCES 1 (3-14), 2 (17-25), 3 (29-41), 4 (45-50),
5 (54-61), 6(65-68), 7 (71-80), 8 (82-90),
9 (93-113), 10(116-121), 11 (124-127),
12 (131-142);
Structure : FRACTURES WITH BROWN STAINING AND SOME BLUE COATING
IN PCES 1-3, CALCITE VEINLET IN PCE 9, BROWN
COATING ON FRACTURE IN PCE 11;
Texture : APHYRIC, GLASS AND PALAG RIND IN PCE 4, ONE PLAG
CRYSTAL IN PCE 4, YELLOW-GREEN CRYSTALS IN PCE 6-
PROBABLY STAINED PLAG, RARE PLAG IN PCE 8;
Alteration : BROWN STAINING COMMON;
Vesicles :
Location: Filling: SMEC
VESICLES IN PCE 1 LINED WITH BLUE SMEC;
Replacement: PALAGONITE
Minerals Replaced: GLASS
Leg : 37 Top/Bottom Interval(mm): 0/ 850 Analyst: Robinson, P.T.
Hole: 334 Sample Midpoint (m) : 283.85
Core: 18 Top of Core Depth (m) : 281.50
Sect: 2 Top of Section Depth(m): 283.00
LITHOLOGY: APHYRIC BASALT;
SAME AS CORE 18-1;
Piece No. : PCES 1 (3-8), 2 (11-20), 3 (24-28), 4A (31-35),
4B (35-42), 5 (45-49), 6 (52-49), 7 (62-71),
8 (75-81);
Structure : FRACTURES COMMON, PCES 4-7 HAVE A BROWN COATING ON
FRACTURES, PCE 7 ALSO HAS A GREEN COATING, PCE 3
HAS RED BROWN MATERIAL ON FRACTURE;
Texture : APHYRIC;
Alteration : IN PCE 8 ALL BROWNISH MATERIAL ALTERED ALONG WITH
SOME WHITE, NON-CARB MATERIAL, BROWN STAINING
ON PCES 1+2, PCE 3 HAS A GRAY TOP;
Leg : 37 Top/Bottom Interval(mm): 0/1410 Analyst: Robinson, P.T.
Hole: 334 Sample Midpoint (m) : 292.41
Core: 19 Top of Core Depth (m) : 291.00
Sect: 1 Top of Section Depth(m): 291.00
LITHOLOGY: APHYRIC BASALT;
SAME AS CORE 18-2;
Piece No. : PCES 1 (2-16), 2 (20-23), 3 (27-32), 4 (40-45),
5 (50-59), 6 (62-68), 7 (70-80), 8 (83-94),
9 (96-103), 10 (107-113), 12 (125-132),
13 (135-139);
Structure : FRACTURES COMMON THROUGHOUT, SOME CALCITE ON
SURFACE IN PCES 3+7+9, CALCITE VEINLET IN PCE 5;
Texture : APHYRIC;
Alteration : BROWN STAINING ON PCES 1+2;
Vesicles :
Location: Filling: SMEC
SMALL VESICLES DISTRIBUTED UNIFORMILY AND COATED
WITH BLUE SMEC, PCE 11 IS SLIGHTLY MORE
VESICULAR;
Replacement: SMECTITE
IN VESICLES;
CALCITE
ON FRACTURE IN PCE 1;
Leg : 37 Top/Bottom Interval(mm): 0/1430 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 293.93
Core: 19 Top of Core Depth (m) : 291.00
Sect: 2 Top of Section Depth(m): 292.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (2-11), 2 (15-20), 3 (22-29), 4 (30-38),
5 (40-50), 6 (52-58), 8 (57-83), 9(85-92),
10 (94-101), 11 (103-112), 12 (114-120),
13 (121-127), 14 (129-135), 15 (137-141);
Texture : SPARSELY PHYRIC, PCES 1-5+8+14+15 ARE MEDIUM-
GRAINED, PCES 9-13 ARE SLIGHTLY FINER GRAINED,
FRESH GLASS RIND TOP OF PCE 2,
Comments : CONTINUOUS UNIT FROM CORE 19-1, OZIDIZED METALLIC
SPOTS IN GNDMASS, PCE 8 HAS OZIDATION HALOS IN
GNDMASS, PCE 6-VIAL;
Vesicles : Size(mm): 1 Percent:
Location: Filling: CLAY,ZEOLITES
SCATTERED, MOSTLY LINED WITH WHITE CLAY, PCES 2-4
CONTAIN RARE ZEOLITES;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 2
RARE;
Groundmass : THE GNDMASS IS DARKER IN PCES 9-13;
Replacement: CLAY
IN VESICLES;
ZEOLITE
RARE, IN VESICLES;
Leg : 37 Top/Bottom Interval(mm): 0/1430 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 293.93
Core: 19 Top of Core Depth (m) : 291.00
Sect: 2 Top of Section Depth(m): 292.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 7 (60-65);
Texture : APHYRIC, FINE-GRAINED;
Vesicles : Size(mm): 1 Percent:
Location: Filling: ZEOLITE
ABUNDANT ZEOLITE IN VESICLES;
Replacement: ZEOLITE
IN VESICLES;
Leg : 37 Top/Bottom Interval(mm): 0/1320 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 295.32
Core: 19 Top of Core Depth (m) : 291.00
Sect: 3 Top of Section Depth(m): 294.00
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
CONTINUATION OF CORE 19-2;
Piece No. : PCES 1 (2-7), 2 (10-12), 3 (19-28), 4(30-39),
5 (42-47), 6 (50-55), 7 (57-64), 8 (65-70),
9 (72-78), 10 (80-84), 11 (87-97), 12 (99-105),
13 (107-112), 14 (115-129);
Structure : FRACTURE IN PCE 4;
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED;
Comments : MN COATING ON PCES 1-4+9+11+14, FE.OX COATING ON
PCE 4, COATING ON FRACTURE IN PCE 4, OXIDATION HALOS
IN GNDMASS;
Vesicles : Size(mm): 1 Percent:
Location: Filling: ZEOLITE
SCATTERED VESICLES, FILLED WITH ZEOLITE;
Phenocrysts: PLAGIOCLASE ( RARE%)
Size(mm): TO 1
Groundmass : SULFIDE
Replacement: ZEOLITE
IN VESICLES;
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 302.00
Core: 20 Top of Core Depth (m) : 300.50
Sect: 1 Top of Section Depth(m): 300.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (0-10), 2 (10-17) , 3 (19-35), 4 (27-33),
5 (35-40), 6 (?), 7 (50-58), 8 (60-65),
9 (66-72), 10A (75-83), 10B (84-98), 10C (98-109),
11 (112-125), 12 (127-137), 13 (140-148);
Structure : SOME THIN CARB VEINS IN PCES 10A+10B, ZEOLITE VEIN
IN PCE 13;
Texture : APHYRIC, MEDIUM-GRAINED, SLIGHTLY FINER GRAINED
THAN CORE 19, PCE 7 IS COARSER GRAINED THAN
REMAINING CORE;
Alteration : TAN ALTERATION ZONES IN PCE 7-PROBABLY MORE
ALTERED THAN REST OF CORE;
Comments : ALL PIECES HAVE AN MN COATING;
Vesicles : Size(mm): TO 1 Percent:
Location: Filling: ZEOLITES
IN PCES 1-9;
Size(mm): TO 2 Percent:
Location: Filling: CLAY,ZEOLITES
IN PCES 10-13;
Phenocrysts: PLAGIOCLASE ( RARE%)
Size(mm): TO 1
Groundmass : SULFIDE
Replacement: CARBONATE
IN VEINS;
CLAY
IN VESICLES;
ZEOLITE
IN VESICLES AND VEIN;
Leg : 37 Top/Bottom Interval(mm): 0/ 770 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 302.77
Core: 20 Top of Core Depth (m) : 300.50
Sect: 2 Top of Section Depth(m): 302.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (2-25), 1B (25-35), 1C (35-47), 2 (50-66),
3 (68-75);
Structure : THIN CARB VEINS;
Texture : APHYRIC, VERY RARE PLAG, ONE INTERGROWN PYX WITH
PLAG IN PCE 1, FINE TO MEDIUM GRAINED;
Comments : END OF UNIT BEGINNING IN CORE 16-3, GNDMASS SULFIDE
OXIDIZED;
Vesicles : Size(mm): TO 2 Percent:
Location: Filling: CLAY,ZEOLITE
LINED OR FILLED WITH ZEOLITE AND GREEN AND WHITE
CLAY;
Groundmass : SULFIDE
OXIDIZED SULFIDE;
Replacement: CARBONATE
IN VEINS;
ZEOLITE
IN VESICLES;
ZEOLITE
IN VESICLES AND VEIN;
Phenocrysts: PLAGIOCLASE ( RARE%)
VARY SPARSE;
Leg : 37 Top/Bottom Interval(mm): 770/1240 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 303.24
Core: 20 Top of Core Depth (m) : 300.50
Sect: 2 Top of Section Depth(m): 302.77
LITHOLOGY: SEDIMENT;
Leg : 37 Top/Bottom Interval(mm): 1250/1310 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 303.31
Core: 20 Top of Core Depth (m) : 300.50
Sect: 2 Top of Section Depth(m): 303.25
LITHOLOGY: APHYRIC BASALT AND BRECCIA;
Piece No. : PCE 6 (125-131);
Texture : APHYRIC, FINE-GRAINED, SMALL PCES OF CARBONATE
CEMENTED BRECCIA ADHERING;
Comments : MN COATING;
Leg : 37 Top/Bottom Interval(mm): 1320/1390 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 303.39
Core: 20 Top of Core Depth (m) : 300.50
Sect: 2 Top of Section Depth(m): 303.32
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCE 7 (132-139);
Texture : SPARSELY PHYRIC, FINE-GRAINED;
Vesicles :
Location: Filling: ZEOLITES
IN VESICLES;
Phenocrysts: PLAGIOCLASE
Replacement: ZEOLITE
IN VESICLES;
Leg : 37 Top/Bottom Interval(mm): 1400/1480 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 303.48
Core: 20 Top of Core Depth (m) : 300.50
Sect: 2 Top of Section Depth(m): 303.40
LITHOLOGY: APHYRIC BASALT AND BRECCIA;
Piece No. : PCE 8 (140-148);
Texture : APHYRIC, FINE-GRAINED, PALAG BRECCIA ADHERING;
Comments : MN COATING;
Leg : 37 Top/Bottom Interval(mm): 0/ 150 Analyst: Robinson, P.T.
Hole: 334 Sample Midpoint (m) : 310.15
Core: 21 Top of Core Depth (m) : 310.00
Sect: 1 Top of Section Depth(m): 310.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (2-7), 2 (10-15);
Structure : SMEC AND OP.MINS ON FRACTURE;
Texture : APHYRIC, MEDIUM-GRAINED;
Comments : BASALT MEDIUM GRAY;
Vesicles :
Location: Filling: CALCITE
SPARSE;
Groundmass : OLIVINE
OL NOT OBVIOUS IN PCE 2;
Replacement: CALCITE
IN VESICLES;
Leg : 37 Top/Bottom Interval(mm): 0/ 150 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 310.15
Core: 21 Top of Core Depth (m) : 310.00
Sect: 1 Top of Section Depth(m): 310.00
LITHOLOGY: OL MOD MICROPHYRIC BASALT;
Piece No. : PCES 1 (5-8), 2 (10-15);
Texture : MOD MICROPHYRIC, RARE PLAG PHENOS, APHANITIC
GNDMASS;
Vesicles : Size(mm): Percent: 5
VESICULAR;
Phenocrysts: OLIVINE ( 3-5%)
MICROPHENOS;
PLAGIOCLASE ( RARE%)
Groundmass : PLAGIOCLASE
PLAG MICROLITES;
Leg : 37 Top/Bottom Interval(mm): 150/1170 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 311.17
Core: 21 Top of Core Depth (m) : 310.00
Sect: 1 Top of Section Depth(m): 310.15
LITHOLOGY: GABBRO;
Piece No. : PCES 3 (17-27), 4(30-33), 5 (35-50), 6 (54-60),
7 (62-63), 8 (57-72), 9 (75-90), 10 (94-113);
Structure : DENSE, NO PRONOUNCED EVIDENCE OF SHEAR;
Alteration : SLIGHTLY;
FRESH
LOWER PORTION OF PCE 5 IS VERY FRESH;
Groundmass : PLAGIOCLASE ( 50%)
Size(mm): AVG 3-5
ORTHOPYROXENE ( 25%)
Size(mm): AVG 3-5
VERY LARGE OPX TO 10CM;
CLINOPYROXENE ( 25%)
Size(mm): AVG 3-5
TWO PYX-CPX+OPX, WITH EXSOLUTION LAMELLAE OF ONE
IN THE OTHER VISIBLE UNDER INDEX OILS, ORANGISH-
TAN PYX APPEARS TO BE OPX WITH CPX LAMELLAE,
GREEN=CPX WITH OPX LAMELLAE, NO OBVIOUS OL OR
SERP AFTER OL, IN PCE 9 MAXIMUM PYX-3CM ACROSS,
IN ONE ZONE, WITH RAPID CHANGES IN GRAIN SIZ E,
GIVING RISE TO BANDING, SUBPARALLEL TO CORE;
Replacement: AMPHIBOLE
Minerals Replaced: PYX
ZONE IN PCE 10 AT INTERVAL (110-113) ALTERED TO
AMPHIBOLE;
Leg : 37 Top/Bottom Interval(mm): 180/1160 Analyst: Robinson, P.T.
Hole: 334 Sample Midpoint (m) : 311.16
Core: 21 Top of Core Depth (m) : 310.00
Sect: 1 Top of Section Depth(m): 310.18
LITHOLOGY: GABBRO;
Piece No. : PCES 3 (17-27), 4 (30-33), 5 (35-50), 6 (53-59),
7 (62-63), 8 (67-71), 9 (75-90), 10 (92-113);
Structure : SMALL 2-3MM DIAMETER VEIN FILLED WITH GREEN MATERIAL
(ACTINOLITE?) IN PCE 10-NOT CONTINUOUS THROUGH CORE;
Texture : COARSE-GRAINED, HYPIDIOMORPHIC ROCK COMPOSED OF
OPX+CPX+PLAG;
Alteration : SLIGHTLY
MOSTLY BROWN STAINING SHOWN BY STIPPLING;
Comments : LIGHT GRAY GABBRO;
Groundmass : ORTHOPYROXENE ( 30%)
Size(mm): TO 10
SUBHEDRAL LATHS UP TO 1CM LONG, LIGHT BROWN COLOR,
GOLDEN IN STAINED AREAS, LOOKS LIKE BRONZITE IN
THESE AREAS;
CLINOPYROXENE ( 20%)
Size(mm): 0.5
PALE GREEN, GENERALLY ANHEDRAL TO SUBHEDRAL
CRYSTALS ABOUT 0.5MM, EITHER SEPARATE OR
AROUND MARGINS OF OPX CRYSTALS;
PLAGIOCLASE ( 50%)
ANHEDRAL CRYSTALS SURROUNDING OPX AND CPX,
NO OP.MINS VISIBLE;
Replacement: ACTINOLITE
GREEN MATERIAL IN VEIN IS POSSIBLY ACTINOL;
Leg : 37 Top/Bottom Interval(mm): 0/1280 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 320.78
Core: 22 Top of Core Depth (m) : 319.50
Sect: 1 Top of Section Depth(m): 319.50
LITHOLOGY: HORNBLENDE GABBRO;
Piece No. : PCES 1 (4-7), 3 (17-21), 5 (35-45), 6 (47-60),
7 (63-72), 8 (75-82);
Texture : COARSE-GRAINED, COARSER THAN PCE 3 OF CORE 21-1,
PCE 3 IS POSSIBLY CLASTS BROKEN FORM BRECCIA AS IN
PCE 2, PCES 6-9 ARE SIMILAR TO PCE 3;
Structure : PCE 1 IS CUT BY A BAND OF WHITE CRYSTALLINE
MATERIAL;
Alteration : PCE 6 IS ALTERED AT ONE END AND FRESH AT THE
OTHER END, PYX ALTERED IN PCE 7, PCE 1 BASALT OF
CONSIDERABLE DEUTERIC AND/OR HYDROTHERMAL
ALTERATION;
Groundmass : PYROXENE
HORNBLENDE ( 5-10%)
POSSIBLY AS INDIVIDUAL CRYSTALS AS WELL AS
OVERGROWTHS ON PYX;
Replacement: CLAY
Minerals Replaced: PYX
PYX MAINLY ALTERED TO DARK BROWN CLAY IN PCE 7;
AMPHIBOLE
Minerals Replaced: PYX
LARGE PYX ARE RIMMED TO TOTALLY REPLACED BY
GREEN, FIBROUS AMPHIBOLE(ACTINOLITE?);
Leg : 37 Top/Bottom Interval(mm): 0/1280 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 320.78
Core: 22 Top of Core Depth (m) : 319.50
Sect: 1 Top of Section Depth(m): 319.50
LITHOLOGY: GABBRO-PERIDOTITE BRECCIA;
Piece No. : PCES 2 (10-14), 10 (94-103), 11 (105-109),
12 (111-119), 13 (121-125);
Structure : CAVITIES FILLED WITH QUARTZ AND CALCITE(?);
Texture : BRECCIAS ARE SEDIMENTARY BRECCIAS, WHITE CALCAREOUS
MATRIX CONTAINS CLASTS ENTIRELY OF THE GABBRO-
PERIDOTITE ROCKS, MATRIX CONTAINS BADLY CORRODED,
AS YET UNDATED NANNOFOSSILS, INCLUDED COCCOLITHS,
PCES 10-13 ARE SIMILAR TO PCE 2, CLASTS ARE
GABBRO+PLAG PERIDOTITE ASSEMBLAGE(NO BASALT
NOTED), MINERAL CLASTS AND PLAG, TWO PYX,
SERPENTINE, IN WHITE VERY FINE-GRAINED
CALCAREOUS MATRIX, ALL CLASTS ARE ANGULAR;
Alteration : PERIDOTITE IS SERPENTINIZED;
Replacement: SERPENTINITE
Minerals Replaced: PERIDOTITE
Leg : 37 Top/Bottom Interval(mm): 0/1100 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 322.10
Core: 22 Top of Core Depth (m) : 319.50
Sect: 2 Top of Section Depth(m): 321.00
LITHOLOGY: PLAG PERIDOTITE;
Piece No. : PCES 1 (3-9), 2 (11-19), 3(21-25), 4 (27-46),
5 (49-64), 6 (66-86), 7 (93-100),
8 (102-108);
Structure : MINOR FRACTURING AND VEIN FILLING ASSOCIATED WITH
SERPENTINIZATION;
Texture : TEXTURE IS MAINLY PRIMARY IGNEOUS ONE;
Alteration : EXT
Groundmass : OLIVINE (85-90%)
Size(mm): TO 10
ORIGINALLY EUHEDRAL OL TO 1CM ACROSS, REPLACED
ALMOST COMPLETELY BY DARK GREEN SERPENTINE;
PLAGIOCLASE
MILKY, ALTERED PLAG BETWEEN SERPENTIZED OL;
PYROXENE
GREEN PYX IN AREAS BETWEEN SERPENTIZED OL;
Phenocrysts: CHROMITE ( 1-2%)
OCTAHEDRAL;
Replacement: SERPENTINITE
Minerals Replaced: OL
Leg : 37 Top/Bottom Interval(mm): 1100/1200 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 322.20
Core: 22 Top of Core Depth (m) : 319.50
Sect: 2 Top of Section Depth(m): 322.10
LITHOLOGY: HORNBLENDE GABBRO;
SAME AS PCE 3 OF CORE 22-1;
Piece No. : PCE 9 (110-120);
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 330.50
Core: 23 Top of Core Depth (m) : 329.00
Sect: 1 Top of Section Depth(m): 329.00
LITHOLOGY: GABBRO-PERIDOTITE BRECCIA;
IDENTICAL TO PCE 2 OF CORE 22-1;
Piece No. : PCES 1 (3-6), 10 (100-106);
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 330.50
Core: 23 Top of Core Depth (m) : 329.00
Sect: 1 Top of Section Depth(m): 329.00
LITHOLOGY: GABBRO;
SIMILAR TO PCE 3 OF CORE 22-1;
Piece No. : PCES 2 (8-20), 3 (23-27), 7 (56-62), 8 (64-68),
9 (70-95), NO PCE NUMBERS ASSIGNED, INTERVAL
(109-140);
Texture : PCE 2 IS COARSER GRAINED THAN PCE 3 OF CORE 22-1,
INTERVAL (70-78) OF PCE 9 IS FINER GRAINED THAN PCE
3 OF CORE 22-1, BRECCIA AS PCE 2 OF CORE 22-1 IS
ADHERING TO BASE OF PCE 9;
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 330.50
Core: 23 Top of Core Depth (m) : 329.00
Sect: 1 Top of Section Depth(m): 329.00
LITHOLOGY: PERIDOTITE;
SIMILAR TO PERIDOTITE IN CORE 22-1;
Piece No. : PCES 4 (30-35), 5 (38-43), 6 (46-53);
Comments : SERPENTINIZED PLAG IS DARK GREENISH GRAY;
Groundmass : PLAGIOCLASE
SERPENTINIZED;
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 332.00
Core: 23 Top of Core Depth (m) : 329.00
Sect: 2 Top of Section Depth(m): 330.50
LITHOLOGY: HORNBLENDE GABBRO;
SIMILAR TO PCE 3 OF CORE 21-1;
Piece No. : PCES 1 (3-11), 6 (42-45), 7 (47-51), 13 (93-100),
NO PCE NUMBER ASSIGNED, INTERVAL (111-118);
Texture : PCES 5+7 HAVE COARSER PLAG IN GNDMASS, PCE 13 IS
ALSO COARSER;
Alteration : PCES 6+7+13 ARE ALTERED, PCES 6+7 ARE
HYDROTHERMALLY ALTERED;
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 332.00
Core: 23 Top of Core Depth (m) : 329.00
Sect: 2 Top of Section Depth(m): 330.50
LITHOLOGY: GABBRO-PERIDOTITE BRECCIA;
SIMILAR TO PCE 2 OF CORE 21-1;
Piece No. : PCES 2 (14-16), 3 (19-25);
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 332.00
Core: 23 Top of Core Depth (m) : 329.00
Sect: 2 Top of Section Depth(m): 330.50
LITHOLOGY: PERIDOTITE;
SIMILAR TO PCE 1 OF CORE 22-2;
Piece No. : PCES 4 (27-34), 5 (78-83), 8 (53-63), 9 (65-69),
10 (71-75), 11 (78-83), 12 (85-91), NO PCE NUMBER
ASSIGNED, INTERVAL (102-109);
Leg : 37 Top/Bottom Interval(mm): 0/ 790 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 339.29
Core: 24 Top of Core Depth (m) : 338.50
Sect: 1 Top of Section Depth(m): 338.50
LITHOLOGY: GABBRO;
Piece No. : PCES 1A (3-5), 1B (5-12), 2 (21-37), 3 (39-45),
4 (45-52), 5A+5B (54-77);
Texture : COARSE-GRAINED, PCE 2 IS MORE COARSE-GRAINED THAN
PCE 1, PCE 3 IS SLIGHTLY BRECCIATED, IRREGULAR
ZONES OF VERY COARSE PYX WITH MOSTLY MED-GRAINED
PLAG-OPX RICH ROCK;
Structure : NORMAL-GRAINED AREA ON ONE FACE OF PCE 2 SUGGESTS
NEAR-VERTICAL LAYERING, OPX-PLAG MED-GRAINED BAND
2MM WIDE IN PCE 4, NO OBVIOUS FABRIC;
Groundmass : PLAGIOCLASE
AUGITE
HBL AFTER AUGITE;
ORTHOPYROXENE
HYPERSTHENE
PCE 2 HAS LESS FRESH HYPERSTHENE;
Replacement: ORTHOAMPHIBOLE
ORTHOAMPHIBOLE;
IN PCE 4 OPX REPLACED BY ORTHOAMPHIBOLE(?);
HORNBLENDE
Minerals Replaced: AUGITE
Leg : 37 Top/Bottom Interval(mm): 790/1440 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 339.94
Core: 24 Top of Core Depth (m) : 338.50
Sect: 1 Top of Section Depth(m): 339.29
LITHOLOGY: BRECCIATED GABBRO;
Piece No. : PCES 6 (79-89), 7 (91-95), 8A+8B (97-119),
9 (120-130), 10 (132-138), 11 (140 -144);
Texture : NON-CARB MATRIX, BROKEN FRAGMENTS OF FELDSPAR
AND PARTLY URALITIZED PYX IN WHITE MATRIX, SOME
ACTINOLITE-CHLORITE, OPX PRESENT, WHITE MATRIX
POSSIBLY HAS TALC, IN PCE 10 CLASTS OF OPX-CPX-PLAG
ROCK, CHLORITE-ACTINOLITE ALTERED FELDSPAR MATRIX,
BRECCIA POSSIBLE RESULT OF TECTONICS;
Alteration : ALTERED MATRIX IN PCE 10;
Leg : 37 Top/Bottom Interval(mm): 0/ 190 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 340.19
Core: 24 Top of Core Depth (m) : 338.50
Sect: 2 Top of Section Depth(m): 340.00
LITHOLOGY: GABBRO;
Piece No. : PCES 1 (2-8), 2 (9-13), 3 (15-19);
Groundmass : ORTHOPYROXENE
CLINOPYROXENE
URALITE;
PLAGIOCLASE
Leg : 37 Top/Bottom Interval(mm): 190/1500 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 341.50
Core: 24 Top of Core Depth (m) : 338.50
Sect: 2 Top of Section Depth(m): 340.19
LITHOLOGY: BRECCIA;
Piece No. : PCES 4 (21-28), 5 (29-39), 6 (41-47), 7 (48-57),
8A (60-64), 8B (64-78), 9 (80-85), 10 (87-92),
11 (93-105), 12 (107-114), 15 (136-139),
16 (141-147);
Structure : SHEARS WITH CHLORITE IN PCE 8B;
Texture : IN PCES 4-7 BRECCIA OF CLASTS OF ABOVE GABBRO IN
MATRIX OF BROKEN AND ALTERED CRYSTALS, PCES 8-16
HAVE SIMILAR CLASTS WITH CHLORITE-TALC MATRIX OF
BROKEN FRAGMENTS;
Alteration : CRYSTALS IN MATRIX OF PCES 4-7;
Comments : PCES 15+16 PROBABLY OUT OF PLACE;
Leg : 37 Top/Bottom Interval(mm): 1160/1340 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 341.34
Core: 24 Top of Core Depth (m) : 338.50
Sect: 2 Top of Section Depth(m): 341.16
LITHOLOGY: BRECCIA;
Piece No. : PCES 13 (116-121), 14 (123-134);
Structure : IN PCE 13 DARK OVOIDS WITH SUGGESTION OF MESH,
STRUCTURE, IN PCE 14 SHEAR WITH CHLORITE;
Texture : CLASTS OF OL GABBRO, BRIGHT GREEN AMPH
(ACTINOLITE?), PCE 14 HAS SOME LARGE OPX;
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 343.00
Core: 24 Top of Core Depth (m) : 338.50
Sect: 3 Top of Section Depth(m): 341.50
LITHOLOGY: VOLCANICLASTIC BRECCIA;
LIKE UNIT AT TOP OF 24-2;
Piece No. : PCES 1 (2-10), 2 (11-21), 3 (22-30), 5 (39-45);
Texture : BRECCIA, CLASTS OF OPX-CPX(ACTINOLITE)-PLAG GABBRO
OR DIORITE;
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 343.00
Core: 24 Top of Core Depth (m) : 338.50
Sect: 3 Top of Section Depth(m): 341.50
LITHOLOGY: GABBRO;
Piece No. : PCE 4 (31-37);
Groundmass : ORTHOPYROXENE
CLINOPYROXENE
PLAGIOCLASE
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 343.00
Core: 24 Top of Core Depth (m) : 338.50
Sect: 3 Top of Section Depth(m): 341.50
LITHOLOGY: GABBRO;
SIMILAR TO PCE 2 OF 21-1;
Piece No. : PCES 6 (51-61), 12 (133-144);
Texture : SPINEL INCLUSIONS ARE GLASSY;
Alteration : OL IS SERPENTINIZED DARK GRAY;
Groundmass : OLIVINE
LARGE SERPENTINIZED DARK GRAY OVAL SHAPES,
OTHERWISE LIKE PCE 2 OF 21-1;
ACTINOLITE
IN PCE 12;
SPINEL
IN PCE 12 ACTINOL HAS INCLUSIONS OF GLASSY
SPINEL (CHECKED UNDER MICROSCOPE);
MAGNETITE
SERP IN PCE 12 IS SPRINKLED WITH MAGN;
Replacement: SERPENTINITE
Minerals Replaced: OL
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 343.00
Core: 24 Top of Core Depth (m) : 338.50
Sect: 3 Top of Section Depth(m): 341.50
LITHOLOGY: GABBRO;
Piece No. : PCES 8 (80-93), 9 (95-100);
Texture : SOME BRECCIA MATRIX;
Groundmass : OLIVINE
OL POOR GABBRO;
ORTHOPYROXENE
ACTINOLITE
RARE DARK OVOIDS PRESENT;
Leg : 37 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 343.00
Core: 24 Top of Core Depth (m) : 338.50
Sect: 3 Top of Section Depth(m): 341.50
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCES 7A+7B (64-78);
Texture : CLASTS ARE LIKE GABBRO OF PCE 8, UNLIKE GABBRO OF
PCE 6;
Leg : 37 Top/Bottom Interval(mm): 0/1150 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 344.15
Core: 24 Top of Core Depth (m) : 338.50
Sect: 4 Top of Section Depth(m): 343.00
LITHOLOGY: GABBRO;
Piece No. : PCES 1 (3-6), 2 (7-20), 3 (21-25), 7 (61-70),
8 (71-76), 9 (78-91), 10 (92-105), 11 (107-113);
Texture : PCE 2 HAS BRECCIA, PCE 4 IS COARSER THAN PCES 1-3,
PCE 7 HAS SOME CHLORITE-TALC BRECCIA MATRIX, PCE 11
IS UNIFORM, MEDIUM-GRAINED;
Alteration : FRESH
PCE 11;
Comments : PCE 11 GOOD ROCK FOR CHEMICAL DATA, PCE 3 IS IN A
VIAL;
Groundmass : OLIVINE
PCES 4+11 DO NOT CONTAIN OL, PCE 7 IS OL-POOR,
DARK OVOID SHAPE;
ACTINOLITE
IN PCES 2+4+9, GREEN ACTINOL IN PCE 2;
PLAGIOCLASE
IN PCE 4;
SPINEL
MUCH SPINEL IN ACTINOL PATCHES IN PCE 9, LESSER
AMOUNT IN PCE 10;
ANTHOPHYLLITE
ANTHOPHYLLITE IN PCES 2+4+9, TAN IN PCE 2;
Leg : 37 Top/Bottom Interval(mm): 0/1150 Analyst: Melson, W.
Hole: 334 Sample Midpoint (m) : 344.15
Core: 24 Top of Core Depth (m) : 338.50
Sect: 4 Top of Section Depth(m): 343.00
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCES 5 (41-50), 6 (52-59);
Texture : PCE 5 IS BRECCIA OF BROKEN CLASTS (ACTUALLY MINERAL
FRAGMENTS) OF ANTHOPHYLLITE-ACTINOLITE-PLAG
IN MATRIX WITH TALC +CHLORITE,PCE 6 IS SIMILAR;
Comments : PCE 6 IS IN A VIAL;
Leg : 37 Top/Bottom Interval(mm): 0/ 80 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 348.08
Core: 25 Top of Core Depth (m) : 348.00
Sect: 1 Top of Section Depth(m): 348.00
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCE 1 (2-8);
Texture : BRECCIA;
Leg : 37 Top/Bottom Interval(mm): 100/ 450 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 348.45
Core: 25 Top of Core Depth (m) : 348.00
Sect: 1 Top of Section Depth(m): 348.10
LITHOLOGY: PERIDOTITE AND GABBRO;
PERIDOTITE AND GABBRO ARE INTIMATELY INTERLAYERED
AND APPEAR TO GRADE INTO ONE ANOTHER, PERIDOTITE
SAME AS IN PCES 7-10, ANTHOPHYLLITE WITH GABBRO IN
PCE 6;
Piece No. : PCES 2 (10-17), 3 (19-24), 4 (26-32), 5 (34-39),
6 (41-45);
Structure : PCE 4 PLAG-PERIDOTITE AND PLAG RICH DIORITE
LAYERED?
Comments : OXIDIZED PLAG PERIDOTITE IN PCE 3;
Groundmass : PLAGIOCLASE
IN ALL PERIDOTITE-PCES 2-5, RECRYSTALLED(?) SUGARY
PLAG IN PCE 3;
AMPHIBOLE
LARGE MINERALS OF AMPH IN PCE 3;
HORNBLENDE
FRESH BROWN HBL IN PCE 5;
ACTINOLITE
IN PCES 5+6;
NO OL IN PCE 6;
ANTHOPHYLLITE
OL-FREE ACTINOLITE-TAN ANTHOPHYLLITE GABBRO IN PCE
Leg : 37 Top/Bottom Interval(mm): 470/ 770 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 348.77
Core: 25 Top of Core Depth (m) : 348.00
Sect: 1 Top of Section Depth(m): 348.47
LITHOLOGY: PERIDOTITE;
Piece No. : PCES 7 (47-52), 8 (54-61), 9 (62-68), 10 (70-77);
Texture : SPINEL INCLUSIONS ARE GLASSY;
Groundmass : OLIVINE (80-90%)
SERP AFTER OL, OVOID;
MAGNETITE
DUSTED ON SERP;
COMBINATION (10-20%)
INCLUDING PLAG+ACTINOL, INTERSTITIAL;
SPINEL
OVOIDS HAVE GLASSY BLACK INCLUSIONS OF SPINEL;
Replacement: SERPENTINITE
Minerals Replaced: OL
Leg : 37 Top/Bottom Interval(mm): 790/1480 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 349.48
Core: 25 Top of Core Depth (m) : 348.00
Sect: 1 Top of Section Depth(m): 348.79
LITHOLOGY: GABBRO;
SAME AS GABBRO IN CORE 24;
Piece No. : 11 (79-82), 12 (84-92), 13 (94-110),
14 (111-121), 15 (123-139), 16 (141-148);
Structure : PCE 16 CONTACT WITH BRECCIA CONTAINING FRAGMENTS
OF PLAG PERIDOTITE;
Comments : PCE 13 GOOD FOR CHEMICAL DATA;
Groundmass : OLIVINE
OL POOR;
Leg : 37 Top/Bottom Interval(mm): 0/1460 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 358.96
Core: 26 Top of Core Depth (m) : 357.50
Sect: 1 Top of Section Depth(m): 357.50
LITHOLOGY: BRECCIA;
Piece No. : PCES 1 (2-5), 2 (7-10), 4 (28-32), 8 (52-60),
12 (86-94), 13 (95-100);
Structure : FRACTURES IN PCE 1;
Texture : IN PCE 1 GOOD CRYSTALS OF ? ON FRACTURE SURFACES,
PCE 4 FRAGMENTS OF PLAG PERIDOTITE IN TALC+CHLORITE
BRECCIA, IN PCE 8 ONE CLAST OF OL GABBRO, BRECCIA
IN PCE 12 INCLUDES CRYSTAL FRAGMENTS, WHITE MATRIX
IN PCE 13;
Comments : REFRACTIVE INDEX OF MATRIX IN PCE 13 LESS THAN 1.6,
GREATER THAN 1.54;
Leg : 37 Top/Bottom Interval(mm): 0/1460 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 358.96
Core: 26 Top of Core Depth (m) : 357.50
Sect: 1 Top of Section Depth(m): 357.50
LITHOLOGY: GABBRO;
Piece No. : PCES 3 (12-25), 5 (35-40), 11 (81-85);
Comments : PCE 11 IS IN A VIAL;
Groundmass : OLIVINE
IN PCE 3, PCE 5 IS OL-FREE TO OL-POOR, PCE 11 IS
OL-POOR;
PLAGIOCLASE
IN PCE 3;
ACTINOLITE
IN PCE 3;
SPINEL
IN PCE 3 ABUNDANT SPINEL IN OL+ACTINOL+PLAG;
Leg : 37 Top/Bottom Interval(mm): 0/1460 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 358.96
Core: 26 Top of Core Depth (m) : 357.50
Sect: 1 Top of Section Depth(m): 357.50
LITHOLOGY: PERIDOTITE;
Piece No. : PCES 6 (41-45), 7 (48-50), 10 (71-79), 14 (102-107),
15A+B (109-115), 16 (107-125), 17 (127-130),
18 (132-144);
Structure : PCES 6+7 ARE IN CHIPS, PCE 10 IS POSSIBLY SHEARED;
Comments : PCES 6+7+14+17 ARE IN VIALS;
Groundmass : PLAGIOCLASE
Leg : 37 Top/Bottom Interval(mm): 0/ 250 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 359.25
Core: 26 Top of Core Depth (m) : 357.50
Sect: 2 Top of Section Depth(m): 359.00
LITHOLOGY: PERIDOTITE;
CONTINUATION OF 26-1;
Piece No. : PCES 1 (2-10), 2 (12-16), 3 (18-25);
Groundmass : PLAGIOCLASE
Leg : 37 Top/Bottom Interval(mm): 270/1190 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 360.19
Core: 26 Top of Core Depth (m) : 357.50
Sect: 2 Top of Section Depth(m): 359.27
LITHOLOGY: GABBRO;
PCES 8-12 ARE SIMILAR TO GABBRO PCES IN CORES 24-25;
Piece No. : PCES 4 (27-32), 5 (34-39), 6 (40-45), 7 (46-54),
8 (55-70), 9 (72-89), 10A+B (90-105), 11 (106-113),
12 (114-119);
Texture : PCES 4+7 ARE COARSE-GRAINED, SOME BRECCIA IN PCE 4;
Comments : PCES 5+6+12 ARE IN VIALS;
Groundmass : PLAGIOCLASE
ACTINOLITE
ORTHOPYROXENE
OPX UNCERTAIN;
ANTHOPHYLLITE
COARSE ACTINOLITE+PLAG+ANTHOPHYLLITE(AND OPX?)+
SOME BRECCIA IN PCE 4;
Leg : 37 Top/Bottom Interval(mm): 0/ 500 Analyst: Wright, T.
Hole: 334 Sample Midpoint (m) : 367.50
Core: 27 Top of Core Depth (m) : 367.00
Sect: 1 Top of Section Depth(m): 367.00
LITHOLOGY: GABBRO;
Piece No. : PCES 1 (2-11), 2 (13-17), 3 (19-24), 4 (26-30),
5 (32-50), 6 (37-50);
Structure : GREENISH TALC ON SHEAR;
Texture : PCES 4-6 ARE COARSE GRAINED, PCE 5 IS BRECCIATED;
Alteration : PCES 1+5 ARE ALTERED;
Groundmass : ACTINOLITE
IN PCES 1+3+6;
TALC
IN PCES 1+3;
PLAGIOCLASE
IN PCES 1+3+6;
ORTHOPYROXENE
OPX UNCERTAIN IN PCES 2+4;
AMPHIBOLE
IN PCE 4;
OLIVINE
Size(mm): TO 10
IN PCE 6;
ANTHOPHYLLITE
COARSE OL GABBRO (ACTINOLITE+ANTHOPHYLLITE+PLAG)
IN PCE 6;
Replacement: TALC
GREENISH TALC ON SHEAR;
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