Leg : 45 Top/Bottom Interval(mm): 0/ 50 Analyst: Graham, A.
Hole: 396 Sample Midpoint (m) : 125.21
Core: 14 Top of Core Depth (m) : 117.20
Sect: 6 Top of Section Depth(m): 125.16
LITHOLOGY: SEDIMENT (FORAM-NANNO OOZE);
Leg : 45 Top/Bottom Interval(mm): 50/1500 Analyst: Graham, A.
Hole: 396 Sample Midpoint (m) : 126.66
Core: 14 Top of Core Depth (m) : 117.20
Sect: 6 Top of Section Depth(m): 125.21
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1 (5-10), 2 (8-18), 3 (18-26), 4 (26-37),
5 (36-42), 6 (41-49), 7 (49-57), 8 (57-61),
9 (60-62), 10 (62-66), 11 (66-73), 12 (73-77),
13 (77-84), 14 (84-92), 15 (92-99), 16 (98-107),
17 (107-111), 18 (110-120), 19 (120-125),
20 (125-129), 21 (127-138), 22 (138-143),
23 (143-150);
Texture : PLAG-OL PHYRIC, PORPHYRITIC, GLASSY ZONES IN PCES
1+2 & 10-12 & 17-18 & 22, VARIOLITIC ZONE ADJACENT
TO THE GLASSY ZONES;
Structure : CRACK IN PCE 19 3MM WIDE FILLED WITH LITHIFIED
SEDIMENT;
Alteration : MOD
PCES 1-6 FRESHEST, PCE 7 IS THE MOST ALTERED AND
IS OCHRE BROWN IN COLOR;
Comments : IN PCE 7 LITHIFIED FORAM-NANNO OOZE CONTACTING
BASALT, PCES 1-13 ARE EMBEDDED IN SEDIMENT,
RECOVERY WAS 100% IN THIS SECTION;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 7
OLIVINE ( RARE%)
Size(mm): TO 2
Leg : 45 Top/Bottom Interval(mm): 0/ 200 Analyst: Graham, A.
Hole: 396 Sample Midpoint (m) : 126.86
Core: 14 Top of Core Depth (m) : 117.20
Sect: CC Top of Section Depth(m): 126.76
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1 (0-8), 2 (9-20);
Texture : PLAG-OL PHYRIC, PORPHYRITIC, VERY FINE-GRAINED;
Alteration : MOD;
Comments : GNDMASS IS LIGHT BROWN IN COLOR, PCES 1+2 CONTAIN
LITHIFIED SEDIMENTS;
Phenocrysts: PLAGIOCLASE ( 15%)
OLIVINE ( 5%)
Leg : 45 Top/Bottom Interval(mm): 430/1470 Analyst: Melson, W.
Hole: 396 Sample Midpoint (m) : 128.21
Core: 15 Top of Core Depth (m) : 126.74
Sect: 1 Top of Section Depth(m): 127.17
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW LAVA;
Piece No. : PCE 1 (43-52), 2 (48-52), 4 (62-68),
5 (69-73), 6 (75-80), 7A (82-91), 7B (91-97),
7C (97-106), 8 (107-111), 9 (112-118), 10 (119-126),
11 (127-134), 12 (135-147);
Texture : PLAG-OL MOD PHYRIC, PCES 4 & 7A-7C & 9-12 BASALT IS
QUENCHED AT SEDIMENT-BASALT CONTACT FORMING GLASSY
MARGINS, SEDIMENT CONTAINS PALAGONITIZED GLASS IN
PCE 10;
Structure : SECTION REPRESENTS A PILLOW LAVA SEQUENCE EXTRUDED
INTO OOZE, PCES 4 & 7A-7C & 9-12 HAVE LITHIFIED
SEDIMENT FILLING CRACKS;
Alteration : MOD
PCES 5-6 & 8-9 & 11 AND PART OF PCES 1-4 & 7A-7C
& 10 & 12;
EXT
PART OF PCES 1-4 & 7A-7C & 10 & 12;
Comments : PCE 7B HAS UNLITHIFIED SEDIMENT PATCHES (POSSIBLY
DATABLE), PCES 4 & 7A-7C & 9-12 HAVE LITHIFIED
SEDIMENT ADHERING TO THE BASALT PCES;
Vesicles : Size(mm): Percent: 1
IN PCES 1-2;
Phenocrysts: PLAGIOCLASE ( 3-7%)
OLIVINE ( <1-2%)
Leg : 45 Top/Bottom Interval(mm): 540/ 620 Analyst: Melson, W.
Hole: 396 Sample Midpoint (m) : 127.36
Core: 15 Top of Core Depth (m) : 126.74
Sect: 1 Top of Section Depth(m): 127.28
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 3 (54-62);
Texture : PLAG-OL PHYRIC, PORPHYRITIC;
Alteration : MOD
LOWER PART;
EXT
UPPER PART;
Comments : NO BASALT SEDIMENT CONTACT IN THIS PCE;
Phenocrysts: PLAGIOCLASE ( 10%)
ONE LARGE TABULAR EUHEDRAL PLAG PHENO 1X.3CM IS
PRESENT;
OLIVINE ( 2%)
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 396 Sample Midpoint (m) : 129.74
Core: 15 Top of Core Depth (m) : 126.74
Sect: 2 Top of Section Depth(m): 128.24
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1 (3-12), 2 (12-17), 3 (18-27), 4 (27-31),
5A (32-42), 5B (42-50), 5C (50-57), 6 (58-67),
7 (68-76), 8 (77-83), 9 (84-94), 11 (113-122),
12 (123-129), 13 (130-137), 14 (138-148);
Texture : PLAG-OL MOD PHYRIC, CHILLED MARGINS AT BASALT
SEDIMENT CONTACT, GLASSY MARGINS AT SEDIMENT CONTACT
IN PCES 1-5A & 7 & 12;
Structure : CARB SEDIMENT FILLING CRACKS IN MOST PCES;
Alteration : MOD
PCES 4 & 11-14 AND PART OF PCES 5A & 9;
EXT
PCES 1-3 & 5B-8 AND PART OF PCES 5A & 9;
Phenocrysts: PLAGIOCLASE ( 3-6%)
Size(mm): 1X2-2X3
OLIVINE ( <1-1%)
Size(mm): 1X2-2X3
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Melson, W.
Hole: 396 Sample Midpoint (m) : 129.74
Core: 15 Top of Core Depth (m) : 126.74
Sect: 2 Top of Section Depth(m): 128.24
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 10A (95-105), 10B (105-112);
Texture : PLAG-OL SPARSELY PHYRIC, PCES GRADE FROM SPARSELY
PHYRIC TO APHYRIC AREAS, CHILLED MARGINS AT BASALT
SEDIMENT CONTACT;
Structure : BOTH PCE 10A AND 10B ARE CUT BY CRACKS FILLED BY
CARB SEDIMENT;
Alteration : MOD
PART OF PCE 10B;
EXT
PCE 10A AND PART OF PCE 10B;
Phenocrysts: PLAGIOCLASE
OLIVINE
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Graham, A.
Hole: 396 Sample Midpoint (m) : 131.24
Core: 15 Top of Core Depth (m) : 126.74
Sect: 3 Top of Section Depth(m): 129.74
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE NO PCE NUMBERS ASSIGNED;
Texture : PLAG-OL MOD PHYRIC, GLASSY MARGINS FOUND AT 30CM &
45CM AND ON ALL PCES FROM 70CM TO 135CM, PCE AT
110CM HAS GLASS SELVAGE AND SEDIMENT GLASS MIXTURE;
Structure : CARB VEINS CUT MANY PCES;
Alteration : MOD;
Comments : LITHIFIED SEDIMENTS ASSOCIATED WITH BASALTS AT
GLASSY MARGINS;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): 1-3
1-3MM AVERAGE, 5MM MAXIMUM;
OLIVINE ( 2%)
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/ 310 Analyst: Bougault, H.
Hole: 396 Sample Midpoint (m) : 131.55
Core: 15 Top of Core Depth (m) : 126.74
Sect: 4 Top of Section Depth(m): 131.24
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE NO PCE NUMBERS ASSIGNED;
Texture : PLAG-OL MOD PHYRIC;
Structure : CARB SEDIMENT VEIN AT 19-22CM;
Alteration : MOD
AT INTERVAL 20-31CM;
EXT
AT INTERVAL 0-20;
Comments : THE PCE AT 0-10CM HAS SEDIMENT ADHERING TO IT;
Phenocrysts: PLAGIOCLASE ( 3-7%)
OLIVINE ( 1-3%)
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 310/ 630 Analyst: Bougault, H.
Hole: 396 Sample Midpoint (m) : 131.87
Core: 15 Top of Core Depth (m) : 126.74
Sect: 4 Top of Section Depth(m): 131.55
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE NO PCE NUMBERS ASSIGNED;
Texture : PLAG-OL PHYRIC, PORPHYRITIC;
Structure : CARB VEINS PRESENT (LITHIFIED SEDIMENTS);
Alteration : MOD
ALTERATION MORE INTENSE ALONG VEINS;
Phenocrysts: PLAGIOCLASE ( 7%)
OLIVINE ( 5%)
Leg : 45 Top/Bottom Interval(mm): 630/1450 Analyst: Bougault, H.
Hole: 396 Sample Midpoint (m) : 132.69
Core: 15 Top of Core Depth (m) : 126.74
Sect: 4 Top of Section Depth(m): 131.87
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE NO PCE NUMBERS ASSIGNED;
Texture : PLAG-OL MOD PHYRIC, MOD PORPHYRITIC,
GLASSY ZONES AT 63CM+90CM+100CM;
Structure : CARB VEINS PRESENT (LITHIFIED SEDIMENTS);
Alteration : MOD
73-78CM & 82-88CM & 108-145CM;
EXT
63-73CM & 78-84CM & 98-108CM;
Phenocrysts: PLAGIOCLASE ( 5-3%)
OLIVINE ( 2-1%)
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 280/1500 Analyst: Graham, A.
Hole: 396 Sample Midpoint (m) : 137.55
Core: 16 Top of Core Depth (m) : 136.05
Sect: 1 Top of Section Depth(m): 136.33
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE NO PCE NUMBERS ASSIGNED;
Texture : PLAG-OL MOD PHYRIC, MOD PORPHYRITIC, GLASS FOUND
AT 72CM AND 77CM AND 103CM AND 137CM;
Structure : CRACKS AND VEINS OF LITHIFIED FORAM NANNO OOZE
ESPECIALLY IN 87-95CM AND 132-135CM;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( 2-7%)
Size(mm): <2
OLIVINE ( TR-1%)
Size(mm): <2
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Graham, A.
Hole: 396 Sample Midpoint (m) : 139.05
Core: 16 Top of Core Depth (m) : 136.05
Sect: 2 Top of Section Depth(m): 137.55
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (2-12), 1B (10-24), 1C (23-29), 1D (29-40),
1E (40-47), 1F (45-49), 1G (48-62), 1H (62-72),
1I (72-80), 1J (78-90), 1K (90-96), 1L (95-101),
1M (101-114), 1N (114-119), 1O (119-128),
1P (128-138), 1Q (138-142), 1R (142-149);
Texture : PLAG-OL MOD PHYRIC, MOD PORPHYRITIC, SOME PLAG
PHENOS HAVE GLASS INCLUSIONS, GLASS ON PCES 1C-1D
& 1I & 1O & 1P;
Structure : NON CARB SEDIMENT VEINS IN PCE 1D, LITHIFIED CARB
SEDIMENT VEINS IN PCES 1B & 1Q & 1R;
Alteration : MOD
MOST OL IS ALTERED TO BROWN MATERIAL BUT SOME ARE
FRESH, POSSIBLY 2 GENERATIONS OL PRESENT;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): 0.5-3
1MM AVERAGE, SOME PLAG PHENOS HAVE GLASS
INCLUSIONS;
OLIVINE ( 1%)
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 140.55
Core: 16 Top of Core Depth (m) : 136.05
Sect: 3 Top of Section Depth(m): 139.05
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (2-10), 1B (9-22), 1C (22-26), 1D (26-33),
1E (33-40), 1F (40-51), 1G (52-61), 1H (60-70),
1I (70-75), 1J (73-81), 1K (81-88), 1L (88-94),
1M (94-100), 1N (100-108), 1O (108-117),
1P (116-126), 1Q (125-131), 1R (131-136),
1S (134-141), 1T (141-150);
Texture : PLAG-OL MOD PHYRIC, MOD PORPHYRITIC, GLASS PRESENT
ON PCES 1A & 1L & 1N;
Structure : CARB FILLED CRACKS ARE PRESENT IN SOME PCES (NOT
LITHIFIED SEDIMENTS);
Alteration : MOD
PCES 1B-1G & 1I-1K & 1Q-1T AND PART OF PCES 1H &
1P;
EXT
PCES 1A & 1H & 1L-1P;
Comments : NO LITHIFIED SEDIMENTS FOUND IN THIS SECTION;
Vesicles : Size(mm): 0.5 Percent:
VESICLES ARE PRESENT AND PARTLY FILLED BY BROWN
AND GREY-BROWN MATERIAL;
Phenocrysts: PLAGIOCLASE ( 3-7%)
Size(mm): 1-4
OLIVINE ( 1%)
Size(mm): 0.5-1.5
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 142.05
Core: 16 Top of Core Depth (m) : 136.05
Sect: 4 Top of Section Depth(m): 140.55
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (2-7), 1B (6-13), 1C (12-21), 1D (22-32),
1E (32-43), 1F (43-46), 1G (46-55), 1H (55-68),
1I (68-76), 1J (76-92), 1K (92-96), 1L (96-102),
1M (102-110), 1N (110-113), 1O (113-128),
1P (130-136), 1Q (136-150);
Texture : PLAG-OL MOD PHYRIC, MOD PORPHYRITIC, GLASS FOUND
ON PCES 1E & 1G & 1H;
Structure : MOST OF THE PCES HAVE CARB FILLED CRACKS (NOT
LITHIFIED SEDIMENT);
Alteration : MOD
PCES 1A-1B & 1D & 1G-1H & 1K-1N & 1P-1Q AND PART
OF PCES 1I& 1J & 10;
EXT
PCES 1C & 1E-1F & PART OF PCES 1I & 1J & 1O;
Comments : NO LITHIFIED SEDIMENTS FOUND IN THIS SECTION;
Vesicles : Size(mm): <0.5 Percent: RARE
VESICLES ARE RARE AND VERY SMALL AND ARE BOTH
EMPTY AND PARTLY FILLED BY GRAY MATERIAL;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): 1-2 AVG
OLIVINE ( <1%)
Size(mm): 1 AVG
OL BOTH FRESH AND PARTLY ALTERED;
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/ 150 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 142.20
Core: 16 Top of Core Depth (m) : 136.05
Sect: CC Top of Section Depth(m): 142.15
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1 (2-15);
Texture : PLAG-OL PHYRIC, PORPHYRITIC, SOME LARGE OL PHENOS
CONTAIN INCLUSIONS OF VOLCANIC GLASS;
Structure : CARB VEINS ARE PRESENT;
Alteration : MOD
SOME OL ALTERED TO YELLOW REDDISH MATERIAL
(CHLORITE(?) AND IDDINGS(?));
Vesicles : Size(mm): 0.5 Percent: <1
VESICLES EMPTY OR PARTLY FILLED WITH WHITE AND
GRAY MATERIAL;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): 2-4
OLIVINE ( 1%)
Size(mm): <3
Replacement: CARBONATE
IDDINGSITE
Minerals Replaced: OL
ID UNCERTAIN;
CHLORITE
Minerals Replaced: OL
ID UNCERTAIN;
Leg : 45 Top/Bottom Interval(mm): 100/ 350 Analyst: Prosser, E.
Hole: 396 Sample Midpoint (m) : 154.90
Core: 18 Top of Core Depth (m) : 154.55
Sect: 1 Top of Section Depth(m): 154.65
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (10-15), 1B (15-28), 1C (27-31), 1D (31-34);
Texture : PLAG-OL PHYRIC, PORPHYRITIC;
Structure : CARB LINED CRACKS ARE FOUND (NOT LITHIFIED FORAM-
NANNO OOZE);
Alteration : MOD
PART OF PCE 1B;
EXT
PCES 1A & 1C-1D AND PART OF 1B;
Vesicles : Size(mm): <1 Percent: TR-3
VESICLES PRESENT;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): 0.5
OLIVINE ( 5%)
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 350/1470 Analyst: Prosser, E.
Hole: 396 Sample Midpoint (m) : 156.02
Core: 18 Top of Core Depth (m) : 154.55
Sect: 1 Top of Section Depth(m): 154.90
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1E (35-47), 1F (47-62), 1G (62-78), 1H (78-87),
1I (87-93), 1J (92-100), 1K (100-112), 1L (112-119),
1M (119-124), 1N (124-137), 1O (137-148);
Texture : PLAG-OL MOD PHYRIC, PORPHYRITIC, GLASSY ZONES ON
PCES 1E & 1I & 1J, FINE-GRAINED, GRAIN SIZE RANGES
FROM GLASSY THROUGH SUBVARIOLITIC ZONES OF
INCIPIENT CRYSTALLIZATION TO FINE-GRAINED BUT
ESSENTIALLY HOLOCRYSTALLINE,
PHENOS ABUNDANCES VARY THROUGH THIS SECTION,
INTERVAL 35-85CM PHENO ABUNDANCE DECREASE;
Structure : CARB FILLED CRACKS ARE PRESENT (NOT LITHIFIED SED);
Alteration : MOD
PCES 1F-1G & 1I-1K & 1M-1O AND THE LOWER PART OF
PCE 1E;
EXT
PCES 1H & 1L AND THE UPPER PART OF PCE 1E;
Comments : SEVERAL PILLOWS WERE PROBABLY CORED IN THIS
SECTION;
Vesicles : Size(mm): <1 Percent: TR-3
VESICLES PRESENT;
Phenocrysts: PLAGIOCLASE ( 5%)
OLIVINE ( 1-2%)
AT 35CM;
PLAGIOCLASE ( 2%)
OLIVINE ( <1%)
AT 85CM;
AT THE GLASSY ZONE (PCE 1I) 86-91CM PHENO
ABUNDANCES INCREASE;
PLAGIOCLASE ( 3-5%)
OLIVINE ( <1%)
AT 86-91CM;
AT INTERVAL 93-147CM PHENO ABUNDANCES INCREASE
DOWN SECTION;
PLAGIOCLASE ( 3%)
OLIVINE ( <1%)
AT 93-100CM;
PLAGIOCLASE ( 5-7%)
OLIVINE ( 1-2%)
AT 138-147CM(PCE 10);
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Prosser, E.
Hole: 396 Sample Midpoint (m) : 157.55
Core: 18 Top of Core Depth (m) : 154.55
Sect: 2 Top of Section Depth(m): 156.05
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (0-6), 1B (6-9), 1C (9-20), 1D (20-29),
1E (28-42), 1F (42-53), 1G (54-69), 1H (69-83),
1I (83-92), 1J (92-102), 1K (101-109),
1L (109-115), 1M (113-118), 1N (117-125),
1O (125-137), 1P (136-148);
Texture : PLAG-OL MOD PHYRIC, PORPHYRITIC, GLASS IS FOUND ON
PCES 1B-1D AND 1I-1J AND 1M;
Structure : MOST PCES ARE CUT BY VEINS OF CARB (NOT LITHIFIED
FORAM-NANNO OOZE);
Alteration : MOD
PCES 1D & 1G & 1I-1J & 1N-10 AND PART OF PCES
1E-1F & 1H;
EXT
PCES 1A-1C & 1K-1M AND PART OF PCES 1E & 1F & 1H;
Vesicles : Size(mm): <1 Percent: TR-3
Location: Filling: CLAY
VESICLES PARTLY FILLED WITH CLAYS;
Phenocrysts: PLAGIOCLASE ( 7%)
OLIVINE ( 3%)
IN PCES 1A-1C;
PLAGIOCLASE ( 7%)
Size(mm): 0.5
OLIVINE ( <1%)
AT 20CM;
PLAGIOCLASE ( 3%)
Size(mm): 0.2
OLIVINE ( 2-3%)
AT 75CM;
PLAGIOCLASE ( 5-7%)
Size(mm): 0.8
OLIVINE
INTERVAL 75-93, OL DECREASES;
PLAGIOCLASE ( 5%)
Size(mm): 0.2-0.8
OLIVINE ( 1-2%)
IN PCES 1J-1P EXCEPT PCES 1N+1O WHERE OL<1%;
Replacement: CARBONATE
CLAY MINERALS
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 159.05
Core: 18 Top of Core Depth (m) : 154.55
Sect: 3 Top of Section Depth(m): 157.55
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (0-17), 1B (17-27), 1C (27-36), 1D (37-48),
1E (48-62), 1F (63-69), 1G (70-80), 1H (80-90),
1I (90-102), 1J (103-108), 1K (109-120),
1L (120-128), 1M (128-136), 1N (136-140),
1O (140-143), 1P (143-146), 1Q (146-150);
Texture : PLAG-OL PHYRIC, FINE-GRAINED, RARE
GLOMEROPORPHYRITIC TEXTURE FOR PLAG AND OL, PLAG AND
OL PHENOS CONTAIN VOLCANIC GLASS RELICTS, VOLCANIC
GLASS ZONES IN 1E AND 1F;
Structure : CARB VEINS ESPECIALLY IN PCES 1A&1B&1C;
Alteration : MOD
PCES 1A-1B&1D&1H-1J&1L-1Q;
EXT
PCES 1C&1E-1G&1K;
MORE ALTERED ALONG GLASSY ZONES, VOLCANIC GLASS
PARTLY ALTERED TO PALAG(?) AND CLAY.MINS(?);
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): 1-6
USUALLY 3MM;
OLIVINE ( 1-3%)
Size(mm): 1-3
USUALLY 2MM;
Replacement: CARBONATE
CLAY MINERALS
ID UNCERTAIN;
PALAGONITE
ID UNCERTAIN;
Leg : 45 Top/Bottom Interval(mm): 0/ 500 Analyst: Fujii, T.
Hole: 396 Sample Midpoint (m) : 159.55
Core: 18 Top of Core Depth (m) : 154.55
Sect: CC Top of Section Depth(m): 159.15
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (4-10), 1B (10-15), 1C (15-22), 1D (22-34),
1E (34-50);
Texture : OL-PLAG PHYRIC, PCE 1D BECOMES FINER-GRAINED
DOWNWARD AND HAS GLASSY RIND AT THE BOTTOM, PCE 1E
CONTAINS GLASS AT THE TOP AND BECOMES COARSER-
GRAINED DOWNWARD;
Structure : WHITE CARB VEINLET PENETRATES ALMOST ALL PCES;
Alteration : MOD
PCES 1A-1C AND UPPER PART 1D;
EXT
PCES 1D AND 1E;
Comments : PCES 1A-1C SIMILAR TO UPPER PART 1D;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): TO 5
OLIVINE ( 1-2%)
IN PCE 1A;
PLAGIOCLASE ( 5-7%)
OLIVINE ( 1-2%)
IN PCES 1B+1C;
PLAGIOCLASE ( 3-5%)
Size(mm): TO 2
MOSTLY SMALLER THAN PHENOS IN 1A-1C, IN PCE 1D;
OLIVINE ( 1-2%)
ENRICHED IN THE UPPER COARSER GRAINED PART, IN
PCE 1D;
PLAGIOCLASE ( 3-5%)
OLIVINE ( 1%)
SLIGHTLY ENRICHED IN THE LOWER PART, IN PCE 1E;
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 165.06
Core: 19 Top of Core Depth (m) : 163.56
Sect: 1 Top of Section Depth(m): 163.56
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (1-17), 1B (17-30), 1C (30-42), 1D (42-46),
1E (46-52), 1F (52-67), 1G (67-77), 1H (77-82),
1I (82-92), 1J (93-105), 1K (105-112), 1L (112-124),
1M (124-139), 1N (139-149);
Texture : PLAG-OL PHYRIC, FINE-GRAINED, SOME LARGE PLAG AND
OL PHENOS CONTAIN RELICT VOLCANIC GLASS;
Structure : CARB VEINS IN PCES 1C-1F, LARGE CARB VEIN IN PCE
1C, PCES 1C-1F HAVE MANY CARB VEINS;
Alteration : MOD
PCES 1A+1B+1E+1F+1J-1N;
EXT
PCES 1C+1D+1G-1I,PCES 1G-1I MORE
ALTERED ALONG CARB VEINS;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): 2-5
USUALLY 3MM;
OLIVINE
Size(mm): TO 4
USUALLY 2MM,PARTLY ALTERED TO REDDISH SECONDARY
MINERALS,FRESH OL PRESENT;
Replacement: CARBONATE
IDDINGSITE
ID UNCERTAIN;
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Fujii, T.
Hole: 396 Sample Midpoint (m) : 166.56
Core: 19 Top of Core Depth (m) : 163.56
Sect: 2 Top of Section Depth(m): 165.06
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (2-10), 1B (10-19), 1C (20-30), 1D (31-41),
1E (41-44), 1F (45-57), 1G (58-68), 1H (68-77),
1I (77-80), 1J (80-84), 1K (85-95), 1L (95-104),
1M+1N (104-107), 1O (108-117), 1P (117-127),
1Q (128-138), 1R (138-148);
Texture : OL-PLAG MOD PHYRIC, GRAIN SIZE OF MATRIX AND PHENO
ABUNDANCES VARY FOR EACH SPECIMEN, PCE 1B GRAIN
SIZE OF MATRIX INCREASES SLIGHTLY DOWNWARD-CONTAINS
GLASSY RIND AT TOP, PCE 1F MATRIX BECOMES FINER
DOWNWARD, PCE 1G HAS GLASSY RIND AT TOP-MATRIX
BECOMES SLIGHTLY COARSER DOWNWARD, PCE 1J VERY FINE
GRAINED WITH SCARCE PHENOS;
Structure : CARB VEIN-WHITE OR VERY PALE-CUTS THROUGH MOST
SPECIMENS;
Alteration : EXT
PCES 1A-1F+1J-1L+1Q+1R;
MOD
PCES 1F-1I+1M-1P;
GLASS PARTIALLY ALTERED TO PALAG, ALTERATION
INTENSE ALONG VEIN, PCE 1G EXT ALTERED ALONG VEIN,
PCE 1F MOD ALTERED IN LOWER PART, PCES 1K AND 1L
HAVE MOD ALTERED AREAS, BOTTOM PCE 1Q AND TOP PCE
1R MOD ALTERED;
Phenocrysts: PLAGIOCLASE ( 4%)
Size(mm): TO 4
OLIVINE ( 1%)
IN PCE 1A;
PLAGIOCLASE ( 5-7%)
OLIVINE
IN PCE 1B-1F+1H+1I;
PLAGIOCLASE ( 5-7%)
OLIVINE ( 1-2%)
IN PCES 1G+1R, MAX 5MM IN PCE 1R;
PLAGIOCLASE ( 1%)
Size(mm): TO 2
OLIVINE ( RARE%)
IN PCE 1J+1K
PLAGIOCLASE ( 4%)
Size(mm): TO 4
OLIVINE ( 1%)
IN PCES 1L-1N;
PLAGIOCLASE ( 5-7%)
Size(mm): TO 5
OLIVINE ( 2%)
IN PCES 1O+1P;
PLAGIOCLASE ( 3-5%)
Size(mm): TO 3
1MM AVERAGE SIZE;
OLIVINE ( 1%)
IN PCE 1Q;
PLAGIOCLASE ( 5-7%)
Size(mm): TO 5
OLIVINE ( 1-2%)
IN PCE 1R;
Replacement: CARBONATE
PALAGONITE
Leg : 45 Top/Bottom Interval(mm): 220/1480 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 183.54
Core: 21 Top of Core Depth (m) : 182.06
Sect: 1 Top of Section Depth(m): 182.28
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1 (22-26), 2 (28-32), 3 (33-37), 4A (41-51),
4B (51-61), 4C (61-73), 4D (73-85), 5 (87-90),
6A (92-103), 6B (103-110), 7 (112-116), 8 (120-126),
9 (129-134), 10 (137-142), 11 (145-147);
Texture : PLAG-OL PHYRIC, PHENOS CONTAIN GLASS, GLASSY ZONES
ON PCES 3+4A-4C+6A;
Alteration : MOD
PCES 1+2+5 ARE FRESHEST, PCES 4C+6A+6B+10+11 ARE
MOST ALTERED, PCE 7 IS VERY ALTERED;
Comments : PALE BROWN IN COLOR, PCE 10 IS COMRISED OF
FRAGMENTS;
Vesicles : VESICULAR, VESICLES FILLED;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): 1-4
OLIVINE ( 3%)
Size(mm): 1-4
PHENOS ARE SMALLER - 1MM AND FEWER (7%) IN PCES
6A+6B;
Leg : 45 Top/Bottom Interval(mm): 730/ 800 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 192.13
Core: 22 Top of Core Depth (m) : 191.33
Sect: 1 Top of Section Depth(m): 192.06
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (73-80);
Texture : PLAG-OL MOD PHYRIC, FINE-GRAINED, GLASSY COATING
COVERS PART OF SPECIMEN;
Structure : CARB VEINLETS;
Alteration : EXT
OL MOSTLY ALTERED TO REDDISH SECONDARY MINERALS,
GLASSY COATING ALTERED TO PALAG AND CLAY.MINS,
CARB AND ZEOLITES COVER GLASSY PART;
Phenocrysts: PLAGIOCLASE ( 3-5%)
EXCEPTIONALLY LARGE PLAG PHENO (1CM) AT ZONAL
BOUNDARY;
OLIVINE ( 3-5%)
Replacement: CARBONATE
CLAY MINERALS
ZEOLITE
PALAGONITE
Leg : 45 Top/Bottom Interval(mm): 820/1150 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 192.48
Core: 22 Top of Core Depth (m) : 191.33
Sect: 1 Top of Section Depth(m): 192.15
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1B (81-83), 1C (84-88), 1D (89-95), 1E (95-107),
1F (107-115);
Texture : PLAG-OL PHYRIC, FINE-GRAINED;
Structure : CARB VEINLETS;
Alteration : MOD;
EXT
PCE 1D;
Phenocrysts: PLAGIOCLASE ( 3-7%)
Size(mm): 2-10
PLAG GRAIN SIZE VARIES FROM TOP TO BOTTOM, IN PCE
1E+1F SOME LARGE (SIZE 1CM) PLAG PHENOS;
OLIVINE ( 1-5%)
OL MOSTLY ALTERED TO REDDISH SECONDARY MINERALS;
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 1150/1500 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 192.83
Core: 22 Top of Core Depth (m) : 191.33
Sect: 1 Top of Section Depth(m): 192.48
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1G (115-120), 1H (121-126), 1I (126-130),
1J (130-136), 1K (136-144), 1L (144-150);
Texture : PLAG-OL MOD PHYRIC, FINE-GRAINED, GLASSY ZONES IN
PCES 1G-1J;
Structure : CARB VEINLETS;
Alteration : EXT
PCES 1G-1J;
MOD
PCES 1K-1L;
Phenocrysts: PLAGIOCLASE ( 5%)
OLIVINE ( 3%)
OL MOSTLY ALTERED TO REDDISH SECONDARY MINERALS;
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Fujii, T.
Hole: 396 Sample Midpoint (m) : 194.33
Core: 22 Top of Core Depth (m) : 191.33
Sect: 2 Top of Section Depth(m): 192.83
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (0-13), 1B (13-24), 1C (24-29), 1D (30-35),
1E (35-47), 1F (47-62), 1G (62-77), 1H (77-88),
1I (89-99), 1J (100-105), 1K (105-114),
1L (115-127) , 1M (127-137), 1N+1O (137-140),
1P (140-150);
Texture : PLAG-OL PHYRIC, GLASS EXTERIORS ON PCES 1A+1B+1E+1J+
1K, PCE 1A MATRIX BECOMES FINER DOWNWARD, PCE 1B
MATRIX BECOMES COARSER DOWNWARD, PCE 1E MATRIX
BECOMES COARSER DOWNWARD, PCE 1J MATRIX BECOMES
FINER TOWARD GLASS AT THE BOTTOM, PCE 1K MATRIX
BECOMES COARSER DOWNWARD;
Structure : CARB VEINS PENETRATE ALL SPECIMENS, PCES 1E-1J
PROBABLY REPRESENT A SINGLE PILLOW;
Alteration : MOD
PCES 1B-1D+1F-1K;
EXT
PCES 1A+1E+1J(BOTTOM)-1K(TOP);
Phenocrysts: OLIVINE ( 3%)
NEAR THE TOP;
OLIVINE ( 7%)
NEAR THE BOTTOM, OL INCREASES TOWARD BOTTOM;
PLAGIOCLASE ( 10%)
Size(mm): TO 5
OLIVINE ( 3-5%)
IN PCE 1A;
PLAGIOCLASE ( 10%)
Size(mm): 6
OLIVINE ( 3%)
PCES 1B+1C+1D;
PLAGIOCLASE ( 7-10%)
OLIVINE ( 3%)
PCES 1E+1F;
PLAGIOCLASE ( 10%)
OLIVINE ( 7%)
IN PCES 1G+1H+1I;
PLAGIOCLASE ( 7%)
Size(mm): 5
OLIVINE ( 3-5%)
IN PCE 1J;
PLAGIOCLASE ( 5-7%)
OLIVINE ( 3%)
IN PCES 1K+1L+1M+1O+1P;
PLAGIOCLASE ( 7%)
Size(mm): TO 10
OLIVINE ( 7%)
PCE 1E PLAG SIZE 5MM MAX, PCE 1F PLAG SIZE 15MM
MAX-LARGER PHENOS ENRICH LOWER PART, PCE 1G PLAG
SIZE 10MM MAX-AVERAGE SIZE PLAG PHENOS LARGER THAN
IN PCES 1E+1F, PCE 1I PLAG SIZE 6MM MAX-OL PHENOS
LARGER THAN IN 1E+1F+1G, PCE 1K PLAG SIZE 7MM MAX,
PCES 1L+1M+1N+1O PLAG SIZE 5MM MAX, PCE 1P PLAG
SIZE 10MM MAX;
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1470 Analyst: Prosser, E.
Hole: 396 Sample Midpoint (m) : 195.80
Core: 22 Top of Core Depth (m) : 191.33
Sect: 3 Top of Section Depth(m): 194.33
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (0-4), 1B (4-16), 1C (16-25), 1D (25-28),
1E (29-39), 1F (40-45), 1G (45-52), 1H (52-59);
1I (59-70), 1J (70-82), 1K (82-94), 1L (94-107),
1M (107-117), 1N (117-126), 1O (126-130),
1P (130-137), 1Q (137-147);
Texture : PLAG-OL MOD PHYRIC, FINE-GRAINED, GLASSY ZONES AT
PCES 1B+1E+1K-1L+1N+1O+1Q;
Structure : CARB VEINLETS PRESENT THROUGHOUT SECTION, A
SIMILAR SEQUENCE PROBABLY REPRESENTING A PILLOW
WAS RECOGNIZED BETWEEN PCES 1L-1Q, PCES 1E-1K ARE
PROBABLY A SECTION THROUGH A PILLOW, A CRACK OF PCE
1B(1C?) CARB-BLACK SPOTS (MN) AND PALE RED MATERIAL
IS PRESENT;
Alteration : MOD
PCES 1A+1B(BOTTOM HALF)+1H-1K;
EXT
PCES 1B(TOP HALF)+1D-1G+1L-1Q, OL PARTLY FRESH
IN PCES 1H+1I, AT GLASSY ZONES SOME REDDISH
BROWN ALTERATION PRESENT-THE DEGREE OF OL
ALTERATION DEPENDS ON DEGREE OF ALTERATION OF THE
WHOLE ROCK;
Phenocrysts: PLAGIOCLASE ( 3%)
OLIVINE ( 3%)
IN PCES 1A AND AT THE GLASSY ZONE OF PCE 1B;
PLAGIOCLASE ( 5%)
OLIVINE ( 2%)
IN PCE 1C;
PLAGIOCLASE ( 3%)
OLIVINE ( <1%)
IN PCE 1E, PLAG AND OL INCREASE IN ABUNDANCE
AND GRAIN SIZE FROM PCE 1E TO PCES 1H+1I;
PLAGIOCLASE ( 7%)
OLIVINE ( 3%)
IN PCES 1H+1I, DECREASE AGAIN TO 1K;
Leg : 45 Top/Bottom Interval(mm): 0/ 780 Analyst: Fujii, T.
Hole: 396 Sample Midpoint (m) : 196.61
Core: 22 Top of Core Depth (m) : 191.33
Sect: 4 Top of Section Depth(m): 195.83
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (0-12), 1B (12-20), 1C (20-29), 1D (29-32),
1E (32-41), 1F (41-54), 1G (54-63), 1H (63-72),
1I (72-74), 1J (74-78);
Texture : PLAG-OL MOD PHYRIC, GNDMASS MATRIX VERY FINE-GRAINED
IN PCES 1A+1I, MATRIX IN PCE 1G BECOMES FINER
DOWNWARD;
Structure : CARB VEINLETS PENETRATE ALMOST ALL SPECIMENS (PCES
1E-1G PALE BROWN TO WHITE-OTHERS WHITE), WHITE
VEINLETS ARE CARB, BROWNISH VEINLETS ARE COMPOSED
OF CARB AND FE.HYDRX AND/OR BAKED CLAY,
CARB-FE.HYDRX(?) VEINLETS (LIGHT BROWN TO BROWN) IN
PCE 1E;
Alteration : MOD
PCE 1A-1C (UPPER HALF) AND 1F-1J+1N;
EXT
PCE 1C (LOWER HALF)-1E+1J;
CARB COATING (SPHERICAL AGGREGATE) AT TOP OF PCE
1B, PCE 1J ALTERATION VARIES FROM MOD TO EXT
ALTERED;
Vesicles : Size(mm): Percent: 1
VESICLES 1% IN PCES 1I+1J;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): TO 3
OLIVINE ( 2%)
Size(mm): TO 2.5
IN PCE 1A;
PLAGIOCLASE ( 5-7%)
Size(mm): TO 3
OLIVINE ( 4%)
Size(mm): TO 3
IN PCE 1B, AVERAGE GRAIN SIZE > 1A;
PLAGIOCLASE ( 5%)
Size(mm): TO 3
OLIVINE ( 2%)
Size(mm): TO 3
IN PCE 1C, PHENO AMOUNTS DECREASING DOWNWARD;
PLAGIOCLASE ( 5-7%)
Size(mm): TO 5
OLIVINE ( 3%)
IN PCES 1D+1E+1F (UPPER PART), PLAG AVERAGE 1MM;
PLAGIOCLASE ( 7%)
Size(mm): TO 5
OLIVINE ( 2%)
IN PCE 1G;
PLAGIOCLASE ( 5-7%)
Size(mm): TO 7
OLIVINE ( 1%)
IN PCE 1H;
PLAGIOCLASE ( 5%)
Size(mm): TO 3
OLIVINE ( <1%)
IN PCE 1I;
OL RICHER IN PCE 1J THAN IN PCE 1I;
Replacement: CARBONATE
FERROUS HYDROX MINS
Leg : 45 Top/Bottom Interval(mm): 780/1500 Analyst: Fujii, T.
Hole: 396 Sample Midpoint (m) : 197.33
Core: 22 Top of Core Depth (m) : 191.33
Sect: 4 Top of Section Depth(m): 196.61
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1K (78-88), 1L (88-97), 1M (97-102),
1N (102-112), 1O (112-129), 1P (129-143),
1Q (143-150);
Texture : PLAG-OL PHYRIC, GLASSY RIND ON PCES 1M+1N, GNDMASS
MATRIX VERY FINE-GRAINED IN PCE 1M, MATRIX BECOMES
FINER DOWNWARD IN PCE 1N;
Structure : WHITE CARB VEINLETS PENETRATE ALMOST ALL SPECIMENS;
Alteration : MOD
PCES 1N (LOWER 75%)-1Q;
EXT
PCES 1K-1N (UPPER 25%),
PCES 1L+1M HAVE MOD ALTERED AREAS;
Vesicles : Size(mm): Percent: 1-2
IN PCE 1K, ALMOST EMPTY;
Size(mm): Percent: 1
IN PCE 1L;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 7
OLIVINE ( 2-3%)
IN PCE 1K;
PLAGIOCLASE ( 7-10%)
Size(mm): TO 5
OLIVINE ( 2%)
IN PCE 1L;
PLAGIOCLASE ( 10%)
OLIVINE ( 2%)
IN PCE 1M;
PLAGIOCLASE ( 7-10%)
Size(mm): TO 5
OLIVINE ( 2%)
IN PCE 1N;
PLAGIOCLASE ( 10%)
Size(mm): TO 5
OLIVINE ( <2%)
IN PCES 1O-1Q;
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 970/1500 Analyst: Fujii, T.
Hole: 396 Sample Midpoint (m) : 198.83
Core: 22 Top of Core Depth (m) : 191.33
Sect: CC Top of Section Depth(m): 198.30
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1 (97-107), 2 (107-122), 3 (122-126),
4 (126-138), 5 (138-150);
Texture : PLAG-OL PHYRIC, GLASSY AREA ON PCE 4, VERY FINE-
GRAINED MATRIX IN PCE 3, MATRIX CHANGES GRAIN SIZE
DOWNWARD FROM GLASS TO FINE THROUGH VERY FINE
GRAINED IN PCE 4;
Structure : CARB VEINLETS PENETRATE PCE 2, CARB VEIN IN PCES
4+5, CARB WITH BLACK SPOTS (MN) COATS CRACK PLANE
OF PCE 1;
Alteration : MOD
AN AREA OF PCE 1 IS COATED WITH CARB WHICH IS
FURTHER COATED WITH DARK GREENISH BROWN MINERALS;
Comments : BARED SEDIMENT PENETRATES INTO ALTERED GLASS AT
TOP OF PCE 4, PCES SHOULD HAVE BEEN PLACED AT THE
TOP OF THE SECTION-THEY WERE RECOVERED
CONTIGUOUS TO THE BOTTOM OF 22-4, CARB WITH BLACK
SPOTS (MN) COATS CRACK PLANE OF PCE 1;
Vesicles : Size(mm): Percent: 1
IN PCE 2, EMPTY;
Size(mm): Percent: 1
IN PCE 4;
Size(mm): Percent: 2
IN PCE 5, PARTLY FILLED WITH DARK GREEN MINERALS;
LARGE VESICLES IN SMALL AMOUNTS PRESENT AT UPPER
LEFT OF PCE 3;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): TO 5
OLIVINE ( 2%)
IN PCE 1, PLAG AVERAGE 2MM;
PLAGIOCLASE ( 10%)
OLIVINE ( 5%)
IN PCE 2;
PLAGIOCLASE ( 5-7%)
Size(mm): TO 5
OLIVINE ( 3-5%)
IN PCE 3;
PLAGIOCLASE ( 7-10%)
Size(mm): TO 5
OLIVINE ( 3%)
IN PCE 4;
PLAGIOCLASE ( 7%)
Size(mm): TO 7
OLIVINE ( 2%)
IN PCE 5;
Replacement: CARBONATE
OL IS ALMOST COMPLETELY ALTERED TO BROWN MINERALS;
Leg : 45 Top/Bottom Interval(mm): 450/1500 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 202.09
Core: 23 Top of Core Depth (m) : 200.59
Sect: 1 Top of Section Depth(m): 201.04
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1 (45-47), 2 (50-57), 3 (60-63), 4 (65-73),
5 (76-89), 6 (92-98), 7 (101-109), 8 (112-115),
9 (117-120), 10 (123-127), 11 (130-133),
12 (136-142), 13 (143-148);
Texture : PLAG-OL PHYRIC, FINE-GRAINED, SOME PHENOS CONTAIN
SMALL DARK GLASS INCLUSIONS;
Structure : CARB VEINS IN PCES 4-7;
Alteration : MOD
PCES 1-3+5+7-13;
EXT
PCES 4-5 (TOP)+6;
OL PARTLY ALTERED;
Vesicles : Size(mm): 0.5-1 Percent: 1-2
PARTLY FILLED BY GREENISH-GREY OR BROWN
MATERIAL;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): 1-4
OLIVINE ( 1-3%)
Size(mm): 1-3
PLAG USUALLY 3-12MM IN PCE 6, OL USUALLY 2MM;
Replacement: CARBONATE
CLAY MINERALS
Leg : 45 Top/Bottom Interval(mm): 810/1470 Analyst: Prosser, E.
Hole: 396 Sample Midpoint (m) : 211.71
Core: 24 Top of Core Depth (m) : 210.24
Sect: 1 Top of Section Depth(m): 211.05
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (81-93), 1B (93-103), 1C (103-112),
1D (112-123), 1E (123-128), 1F (128-138),
1G (138-147);
Texture : PLAG-OL PHYRIC, FINE-GRAINED, GLASSY ZONES AT PCES
1A+1E+1F (PROBABLY PILLOW SURFACE?);
Structure : CARB FILLED VEINLETS PRESENT IN ALL SPECIMENS;
Alteration : EXT
OL ALTERED TO YELLOW-BROWN MATERIAL IN PCE 1B,
GLASSY ZONES SHOW YELLOW-BROWN AND REDDISH-BROWN
ALTERATION;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): 1-3
OLIVINE ( <1%)
IN PCE 1A;
PLAGIOCLASE ( 15%)
Size(mm): 3-5
OLIVINE ( 5%)
IN PCE 1B;
PLAGIOCLASE ( 10%)
Size(mm): 3-5
OLIVINE ( 5%)
IN PCE 1C+1D;
PLAGIOCLASE ( 5%)
OLIVINE ( 3%)
IN PCE 1E;
PLAGIOCLASE ( 15%)
OLIVINE ( 3-5%)
IN PCE 1F+1G;
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 0/1500 Analyst: Fujii, T.
Hole: 396 Sample Midpoint (m) : 213.24
Core: 24 Top of Core Depth (m) : 210.24
Sect: 2 Top of Section Depth(m): 211.74
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
Piece No. : PCE 1A (1-3), 1B+1C (3-7), 1D (7-17), 1E (17-23),
1F (23-25), 1G (26-35), 1H (35-47), 1I (49-59),
1J (60-64), 1K (64-78), 1L (79-87), 1M (87-98),
1N (98-111), 1O (111-114), 1P (114-116),
1Q (116-128), 1R (128-134), 1S (134-137),
1T (137-150);
Texture : PLAG-OL MOD PHYRIC, GLASSY EXTERIORS ON PCES 1A+1B,
GLASSY RINDS ON PCES 1G+1H+1O-1Q, NEARLY GLASSY
GNDMASS MATRIX IN PCES 1A-1C, MATRIX BECOMES
SLIGHTLY COARSER DOWNWARD IN PCE 1D, MATRIX BECOMES
SLIGHTLY FINER IN PCE 1G, MATRIX BECOMES COARSER
DOWNWARD IN PCE 1H, MATRIX BECOMES FINER DOWNWARD
IN PCE 1M, MATRIX VERY FINE-GRAINED WITH GLASS RIND
IN PCES 1O+1P, MATRIX BECOMES COARSER DOWNWARD FROM
GLASS RIND AT TOP OF PCE 1Q, REDDISH-BROWN RIND AT
BOTTOM OF PCE 1M MAY BE ALTERED GLASS;
Structure : BROKEN SURFACES (CRACK PLANES) COATED CARBS, CARB
VEINLETS PRESENT IN MANY PCES;
Alteration : MOD
PCES 1A-1C+1H (LOWER PART)-1M+1Q-1T;
EXT
PCES 1D-1G+1N-1P;
GLASS OF PCE 1A-1C PARTLY ALTERED TO REDDISH
BROWN MINERALS, MOD ALTERED AREAS IN PCES 1D-1E,
BOTTOM PART OF PCES 1M EXT ALTERED, GLASSY RIND OF
PCE 1H MOD ALTERED-UPPER PART PCE 1H EXT ALTERED,
MOST OF OL PHENOS ALTERED TO BROWN MINERALS, OL
PARTLY ALTERED TO BROWN MINERALS;
Comments : AT TOP OF 1H CARB-RICH SEDIMENT PENETRATES GLASSY
RIND;
Vesicles : PCE 1Q UPPER PART SLIGHTLY MORE VESICULAR THAN
LOWER PART;
Phenocrysts: PLAGIOCLASE ( 5%)
OLIVINE ( 3%)
IN PCE 1A;
PLAGIOCLASE ( 7%)
OLIVINE ( RARE%)
IN PCES 1B+1C;
PLAGIOCLASE ( 7-10%)
OLIVINE ( 2-3%)
IN PCES 1D-1F;
PLAGIOCLASE ( 7%)
OLIVINE ( 3%)
IN PCE 1G, LARGE PLAG PHENOS CONCENTRATED IN
UPPER PART (TOWARD CENTER OF PILLOW?) OF PCE 1G;
PLAGIOCLASE ( 10%)
OLIVINE ( 2-3%)
IN PCE 1H, SIZE OF PLAG PHENOS BECOMES LARGER
DOWNWARD IN PCE 1H;
PLAGIOCLASE ( 7-10%)
OLIVINE ( 2-3%)
IN PCE 1I;
PLAGIOCLASE ( 5-7%)
OLIVINE ( 2%)
IN PCES 1J+1N, AVERAGE SIZE PLAG 1.5CM FOR PCE 1N;
PLAGIOCLASE ( 7%)
OLIVINE ( 2-3%)
IN PCES 1K+1L;
PLAGIOCLASE ( 7%)
OLIVINE ( 2%)
IN PCE 1M, SIZE OF PLAG PHENOS OF PCE 1M MUCH
SMALLER THAN IN PCES 1I-1L;
PLAGIOCLASE ( 5%)
OLIVINE ( 2-3%)
IN PCES 1O+1P;
PLAGIOCLASE ( 7-10%)
OLIVINE ( 2%)
IN PCE 1Q;
PLAGIOCLASE ( 5-7%)
OLIVINE ( 3%)
IN PCES 1R+1S;
PLAGIOCLASE ( 7-10%)
OLIVINE ( 5%)
IN PCE 1T, SIZE OF PLAG AND OL PHENOS OF PCE 1T
LARGER THAN IN PCES 1Q-1S;
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 20/1420 Analyst: Prosser, E.
Hole: 396 Sample Midpoint (m) : 214.66
Core: 24 Top of Core Depth (m) : 210.24
Sect: 3 Top of Section Depth(m): 213.26
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (2-15), 1B (15-22), 1C (22-30), 1D (30-40),
1E (42-45), 1F (45-50), 1G (50-62), 1H (62-74),
1I (75-84), 1J (85-90), 1K (90-98), 1L (98-106),
1M (107-119), 1N (119-127), 1O (127-129),
1P (129-142);
Texture : PLAG-OL PHYRIC, FINE-GRAINED, GLASSY ZONE AT PCE 1A-
1I, NO SIGNIFICANT VARIATION OF PLAG PHENO CONTENT
OBSERVED IN PCES 1A-1I, GRAIN SIZE DECREASES
SLIGHTLY AT THE GLASSY AREA;
Structure : AT A CRACK SURFACE OF PCE 1G CARB+YELLOW BROWN TO
PINKISH MATERIAL AND BLACK SPOTS PRESENT, AT CRACK
SURFACES OF PCES 1D+1J+1M CARB AND BLACK SPOTS
ALSO PRESENT;
Alteration : MOD
PCES 1A+1B+1D(UPPER PART)+1H+1I+1K-1P;
EXT
PCES 1C+1D(LOWER PART)-1G+1J;
MOST OF THE OL PHENOS ARE ALTERED TO YELLOW-BROWN
MATERIAL/DEGREE OF OL ALTERATION DEPENDS ON
WEATHERING OF WHOLE ROCK;
Comments : AT GLASSY ZONE OF PCE 1I A 5MM LAYER OF MARL
(CALCAREOUS CLAY) OCCURS;
Phenocrysts: PLAGIOCLASE ( 10%)
IN PCES 1A-1I;
OLIVINE ( 3%)
IN PCE 1A, DECREASING;
OLIVINE ( <1%)
IN PCE 1I;
PLAGIOCLASE ( 5%)
IN PCE 1J, INCREASING;
PLAGIOCLASE ( 10%)
IN PCE 1P;
OLIVINE ( <1%)
IN PCE 1J, INCREASING;
OLIVINE ( 3%)
IN PCE 1P;
Replacement: CARBONATE
Leg : 45 Top/Bottom Interval(mm): 370/1500 Analyst: Zolotarev, B.
Hole: 396 Sample Midpoint (m) : 220.99
Core: 25 Top of Core Depth (m) : 219.49
Sect: 1 Top of Section Depth(m): 219.86
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (37-43), 1B (44-58), 1C (59-67), 1D (67-80),
1E (80-83), 1F (83-97), 1G (98-107), 1H (107-120),
1I (120-132), 1J (132-139), 1K (140-143),
1L+1M (145-149);
Texture : PLAG-OL PHYRIC, VERY FINE-GRAINED, GLASSY, GLASSY
ZONES PRESENT ON PCE 1A AND PCE 1D (UPPER 1-2CM)-
GLASS IN 1D IS ALTERED WITH VARIOLITIC TEXTURE, SOME
LARGE PHENOS HAVE GLASS INCLUSIONS;
Structure : SMALL VEINLETS OF CARB PRESENT IN GLASSY PCES;
Alteration : MOD
PCES 1B (TOP HALF)+1D (TOP HALF)-1M;
EXT
PCES 1A+1B (LOWER HALF)-1D (TOP HALF);
UPPER PART OF GLASS PARTLY ALTERED TO REDDISH
BROWN MATERIAL (PALAG?);
Vesicles : A FEW SMALL VESICLES PRESENT CLOSE TO GLASS;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): 1-3
OLIVINE ( 1%)
Size(mm): 1-2
IN PCE 1A, PLAG AVERAGE 2MM;
PLAGIOCLASE (15-20%)
Size(mm): 1-10
OLIVINE ( 2-3%)
Size(mm): 1-2
IN PCES 1B-1M, PLAG SIZE 2-3MM AVERAGE;
Replacement: CARBONATE
PALAGONITE
ID UNCERTAIN;
|
