Leg : 61 Top/Bottom Interval(mm): 0/ 540 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 559.04
Core: 60 Top of Core Depth (m) : 558.50
Sect: 1 Top of Section Depth(m): 558.50
LITHOLOGY: SEDIMENT;
Leg : 61 Top/Bottom Interval(mm): 540/1330 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 559.83
Core: 60 Top of Core Depth (m) : 558.50
Sect: 1 Top of Section Depth(m): 559.04
LITHOLOGY: MASSIVE BASALT SILL;
Piece No. : PCES 1A (54-86), 1B (86-95), 1C (94-112),
2 (113-117), 3 (119-122), 4A (123-127),
4B (125-132);
Structure : BASALT SILL WITH CHLORITE, CALCITE AND CHLORITE+
CALCITE+CLAY VEINS, MASSIVE;
Texture : APHYRIC TO SLIGHTLY PHYRIC, CHILLED MARGIN AT 55-
60CM(?), TRANSITION ZONE AT 60-99CM (FINE), INTERVAL
99-133CM SLIGHTLY COARSE-GRAINED;
Alteration : MOD
ALTERED ABOUT THE VEINS;
Comments : INTERVAL 55-60CM IS PINKISH GRAY 5YR 8/1 (CHILLED
MARGIN), INTERVAL 60-133CM IS GREENISH GRAY 5G 6/1,
CHLORITE VEIN IS DUSKY BLUE GREEN 5BG 3/2;
Phenocrysts: OLIVINE
PLAGIOCLASE
CLINOPYROXENE
Replacement: CLAY
CALCITE
CHLORITE
Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 561.50
Core: 60 Top of Core Depth (m) : 558.50
Sect: 2 Top of Section Depth(m): 560.00
LITHOLOGY: MASSIVE BASALT SILL;
AS ABOVE IN 60-1;
Piece No. : PCES 1 (0-20), 2 (20-24), 3A (25-50), 3B (50-60),
4A (60-74), 4B (73-93), 5 (94-98), 6 (100-116),
7 (117-123), 8 (124-129), 9 (130-150);
Structure : MASSIVE BASALT SILL, VEINS PRESENT;
Texture : APHYRIC TO SPARSELY PHYRIC, PCES 1-3B ARE SLIGHTLY
COARSE GRAINED, PCES 4+5 ARE A TRANSITIONAL ZONE,
PCE 6 IS FINE-GRAINED AND APHYRIC;
Comments : PHYSICAL PROPERTIES-AT (63-65) V(P)=5.042KM/S,
AT (78-80) V(P)=4.049KM/S ACROSS VEIN AND V(P)=
4.232KM/S PARALLEL TO VEIN;
SAME UNIT AS 60-1;
Alteration : MOD
PCE 2 IS FRESH;
Phenocrysts: OLIVINE
PLAGIOCLASE
CLINOPYROXENE
Comments : PHYSICAL PROPERTIES-AT (0-5) V(P)=5.292KM/S;
Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 562.99
Core: 60 Top of Core Depth (m) : 558.50
Sect: 3 Top of Section Depth(m): 561.50
LITHOLOGY: MASSIVE BASALT SILL;
Piece No. : PCES 1 (6-15), 2 (17-26), 3 (28-31), 4 (32-36),
5A (39-50), 5B (50-58), 6 (59-61), 7 (62-71),
8 (71-75), 9 (76-83), 10 (85-94), 11 (95-104),
12 (105-115), 13 (115-121), 14A (123-128),
14B (128-130), 15 (132-139), 16 (140-149);
Structure : MASSIVE BASALT SILL;
Texture : APHYRIC BASALT, PCES 1-15 ARE FINE-GRAINED;
MOD;
Comments : SAME UNIT ABOVE IN 60-1;
Leg : 61 Top/Bottom Interval(mm): 0/ 280 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 563.28
Core: 60 Top of Core Depth (m) : 558.50
Sect: 4 Top of Section Depth(m): 563.00
LITHOLOGY: MASSIVE BASALT SILL;
Piece No. : PCES 1 (0-9), 2 (10-20), 3 (21-27);
Structure : MASSIVE BASALT SILL;
Texture : APHYRIC;
Comments : SAME UNIT AS ABOVE IN 60-1;
Alteration : MOD;
Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 569.00
Core: 61 Top of Core Depth (m) : 567.50
Sect: 1 Top of Section Depth(m): 567.50
LITHOLOGY: MASSIVE BASALT SILL;
Piece No. : PCES 1 (0-6), 2 (7-30), 3A (31-46), 3B (46-61),
3C (50-61), 4 (62-68), 5 (70-77), 6 (78-85),
7 (85-89), 8 (90-95), 9 (96-103), 10 (104-110),
11 (111-122), 12 (123-131), 13 (103-127),
14 (139-150);
Structure : MASSIVE BASALT SILL;
Texture : APHYRIC, IN PCE 14 SULFIDE IS FOUND ON SURFACE;
Comments : SAME UNIT AS ABOVE IN 60-1, PHYSICAL PROPERTIES-
AT (48-51) V(P)=5.526KM/S (HORIZONTAL), AT (126-128)
V(P)=5.346KM/S (HORIZONTAL);
Alteration : MOD;
Leg : 61 Top/Bottom Interval(mm): 0/ 990 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 569.99
Core: 61 Top of Core Depth (m) : 567.50
Sect: 2 Top of Section Depth(m): 569.00
LITHOLOGY: MASSIVE BASALT SILL;
Piece No. : PCES 1A (0-3), 1B (3-8), 1C (7-10), 2 (12-20),
3 (20-30), 4 (31-42), 5 (44-56), 6A (57-72),
6B (70-72), 7 (75-87), 8A (89-95), 8B (90-97);
Structure : MASSIVE BASALT SILL;
Texture : APHYRIC, IN PCES 2+4+7 SMALL PARTICLES;
Comments : SAME UNIT AS ABOVE IN 60-1;
Alteration : MOD;
Leg : 61 Top/Bottom Interval(mm): 0/1420 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 577.92
Core: 62 Top of Core Depth (m) : 576.50
Sect: 1 Top of Section Depth(m): 576.50
LITHOLOGY: MASSIVE BASALT SILL;
Piece No. : PCES 1A (2-11), 1B (5-11), 2A (13-31), 2B (19-31),
3 (33-41), 4 (43-49), 5 (52-61), 6 (65-73),
7 (75-94), 8 (95-110), 9 (112-123), 10 (125-135),
11 (137-140);
Structure : MASSIVE BASALT SILL;
Texture : APHYRIC, INTERVAL (0-116) IS FINE-GRAINED, INTERVAL
(116-122) IS A TRANSITION ZONE, INTERVAL (122-150)
IS SLIGHTLY COARSE-GRAINED;
Alteration : FRESH
MOSTLY FRESH;
Comments : SAME UNIT AS ABOVE IN 60-1, PHYSICAL PROPERTIES-
AT (85-87) V(P)=5.86KM/S (HORIZONTAL);
Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 579.50
Core: 62 Top of Core Depth (m) : 576.50
Sect: 2 Top of Section Depth(m): 578.00
LITHOLOGY: MASSIVE BASALT SILL;
Piece No. : PCES 1A (0-20), 1B (20-38), 2 (42-46), 3 (49-59),
4A (61-65), 4B (65-66), 5 (70-77), 6 (80-88),
7A (70-106), 7B (107-119), 8 (120-123), 9 (130-138),
10A (140-142), 10B (143-145), 10C (145-150);
Structure : MASSIVE BASALT SILL;
Texture : APHYRIC, SEVERAL SLIGHT GRAIN SIZE CHANGES ARE
OBSERVED;
Comments : SAME UNIT AS ABOVE IN 60-1, PHYSICAL PROPERTIES-
AT (109-111) V(P)=5.31KM/S (HORIZONTAL);
Leg : 61 Top/Bottom Interval(mm): 0/ 610 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 580.11
Core: 63 Top of Core Depth (m) : 579.50
Sect: 1 Top of Section Depth(m): 579.50
LITHOLOGY: SEDIMENT;
BLACK CLAYSTONE;
Leg : 61 Top/Bottom Interval(mm): 610/1350 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 580.85
Core: 63 Top of Core Depth (m) : 579.50
Sect: 1 Top of Section Depth(m): 580.11
LITHOLOGY: MASSIVE BASALT SILL;
Piece No. : PCES 8 (63-100), 9 (101-135);
Structure : BASALT FROM SILL;
Texture : APHYRIC;
Alteration : EXT
ALTERATION IS 'ALMOST COMPLETELY TO BADLY
ALTERED';
Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 582.50
Core: 63 Top of Core Depth (m) : 579.50
Sect: 2 Top of Section Depth(m): 581.00
LITHOLOGY: MICRODIABASIC BASALT;
Piece No. : PCES 1 (0-21), 2 (25-35), 3 (39-47), 4 (50-60),
5 (61-81), 6 (85-87), 7 (90-112), 8 (115-130),
9 (132-150);
Texture : SPARSELY PHYRIC, HOMOGENEOUS MICRODIABASIC,
SPARSE PLAG AS IN BOTTOM OF SECTION 1;
Structure : CHLORITE VEIN IN PCE 5;
Alteration : EXT;
Phenocrysts: PLAGIOCLASE
VERY SPARSE;
Leg : 61 Top/Bottom Interval(mm): 0/1380 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 583.88
Core: 63 Top of Core Depth (m) : 579.50
Sect: 3 Top of Section Depth(m): 582.50
LITHOLOGY: MICRODIABASIC BASALT;
SAME AS SECTION 2;
Piece No. : PCES 1 (1-7), 2 (10-31), 3 (32-46), 4 (50-65),
5 (69-80), 6 (81-110), 7 (110-123), 8 (125-136);
Structure : HEAVILY VEINED IN PCE 5, CHLORITE VEINS IN PCES 6+
8;
Texture : SPARSELY PHYRIC, PERHAPS GOES THROUGH GRAIN SIZE
MAX AT END OF 2 AND DECREASES THEREAFTER;
Phenocrysts: PLAGIOCLASE
Replacement: CHLORITE
IN VEINS;
Alteration : EXT;
Leg : 61 Top/Bottom Interval(mm): 0/ 600 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 584.60
Core: 63 Top of Core Depth (m) : 579.50
Sect: 4 Top of Section Depth(m): 584.00
LITHOLOGY: MICRODIABASIC BASALT;
SAME AS SECTION 3;
Piece No. : PCES 1 (1-20), 2 (23-30), 3 (33-47), 4 (50-57);
Structure : CHLORITE VEINS IN PCE 1 AND PCE 3;
Texture : SPARSELY PHYRIC;
Phenocrysts: PLAGIOCLASE
Replacement: CHLORITE
IN VEINS;
Leg : 61 Top/Bottom Interval(mm): 0/ 300 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 585.80
Core: 64 Top of Core Depth (m) : 585.50
Sect: 1 Top of Section Depth(m): 585.50
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (1-4), 2 (5-30);
Texture : SPARSELY PHYRIC, HOLOCRYSTALLINE, CHILLED MARGIN
BOTTOM CONTACT;
Comments : BOTTOM CONTACT AT PCE 2;
Phenocrysts: PLAGIOCLASE
Alteration : EXT;
Leg : 61 Top/Bottom Interval(mm): 300/1500 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 587.00
Core: 64 Top of Core Depth (m) : 585.50
Sect: 1 Top of Section Depth(m): 585.80
LITHOLOGY: SEDIMENTS;
Leg : 61 Top/Bottom Interval(mm): 0/ 400 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 588.90
Core: 64 Top of Core Depth (m) : 585.50
Sect: 3 Top of Section Depth(m): 588.50
LITHOLOGY: SEDIMENTS;
Leg : 61 Top/Bottom Interval(mm): 400/ 950 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 589.45
Core: 64 Top of Core Depth (m) : 585.50
Sect: 3 Top of Section Depth(m): 588.90
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (42-67), 2 (69-75), 3 (78-82), 4 (84-95);
Structure : CALCITE VEINS NOTED IN PCES 1+3, CHLORITE VEINS
NOTED IN PCES 3+4, PYRITE ALSO IN VEINS OF PCES
3+4;
Texture : SPARSELY PHYRIC, HOLOCRYSTALLINE;
Alteration : ALMOST COMPLETELY;
Phenocrysts: PLAGIOCLASE
Replacement: CALCITE
IN VEINS;
CHLORITE
IN VEINS;
PYRITE
IN VEINS;
Leg : 61 Top/Bottom Interval(mm): 950/1320 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 589.82
Core: 64 Top of Core Depth (m) : 585.50
Sect: 3 Top of Section Depth(m): 589.45
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 5 (97-120), 6 (121-131);
Structure : CHLORITE VEINS IN PCE 5, CHLORITE+RED CLAY/
BROWNISH CLAY IN VEINS ALSO IN PCE 6;
Texture : APHYRIC, HOLOCRYSTALLINE;
Alteration : ALMOST COMPLETELY;
Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 591.49
Core: 64 Top of Core Depth (m) : 585.50
Sect: 4 Top of Section Depth(m): 590.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (0-50), 2 (52-91), 3 (92-112), 4 (114-128),
5 (130-140), 6 (143-149);
Structure : CHLORITE AND PYRITE IN VEINS, CHLORITE VEIN NOTED IN
PCE 5;
Texture : APHYRIC, HOLOCRYSTALLINE;
Leg : 61 Top/Bottom Interval(mm): 0/ 590 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 592.09
Core: 64 Top of Core Depth (m) : 585.50
Sect: 5 Top of Section Depth(m): 591.50
LITHOLOGY: APHYRIC BASALT;
SAME AS IN SECTION 4;
Piece No. : PCES 1 (2-8), 2 (9-31), 3 (35-47), 4 (48-57);
Texture : APHYRIC;
Alteration : FRESH;
Leg : 61 Top/Bottom Interval(mm): 0/ 210 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 594.71
Core: 65 Top of Core Depth (m) : 594.50
Sect: 1 Top of Section Depth(m): 594.50
LITHOLOGY: SEDIMENT;
Leg : 61 Top/Bottom Interval(mm): 210/1420 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 595.92
Core: 65 Top of Core Depth (m) : 594.50
Sect: 1 Top of Section Depth(m): 594.71
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC DOLERITE;
Piece No. : PCES 1 (22-30), 2A (32-57), 2B (57-68), 2C (66-75),
2D (75-80), 2E (80-92), 2F (93-126), 2G (126-142);
Structure : MASSIVE BASALT SILL, CHLORITE VEINS IN PCES 2F+2G;
Texture : MICROPHYRIC, SUBOPHITIC DOLERITE, CHILLED MARGIN IS
NOT CLEAR SO IT IS IMPOSSIBLE TO IDENTIFY GLASSY
ZONE BY THE UNAIDED EYE, GRAIN SIZED IS SLIGHTLY
FINE;
Alteration : MOD;
Comments : CONTACT BETWEEN SEDIMENT AND BASALT AT 21CM;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Groundmass : PLAGIOCLASE
CLINOPYROXENE
GLASS
Replacement: CHLORITE
IN VEINS;
Comments : COLOR IS DARK GREENISH GRAY 5G 4/1;
Leg : 61 Top/Bottom Interval(mm): 0/1350 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 597.35
Core: 65 Top of Core Depth (m) : 594.50
Sect: 2 Top of Section Depth(m): 596.00
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC DOLERITE;
SAME AS ABOVE IN 65-1;
Piece No. : PCE 1A (0-31), 1B (31-42), 1C (43-51), 1D (51-60),
1E (60-70), 1F (69-79), 1G (80-87), 2A (90-111),
2B (111-116), 3 (118-122), 4 (125-135);
Structure : MASSIVE BASALT SILL;
Texture : MICROPHYRIC, SUBOPHITIC DOLERITE;
Alteration : MOD;
Comments : SAME UNIT AS ABOVE IN 65-1;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Leg : 61 Top/Bottom Interval(mm): 0/ 670 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 598.17
Core: 65 Top of Core Depth (m) : 594.50
Sect: 3 Top of Section Depth(m): 597.50
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC DOLERITE;
SAME AS ABOVE IN 65-1;
Piece No. : PCE 1A (0-15), 1B (15-19), 1C (19-23), 1D (24-31),
2A (24-51), 2B (51-58), 2C (58-65);
Structure : MASSIVE BASALT SILL;
Texture : MICROPHYRIC, SUBOPHITIC DOLERITE;
Alteration : MOD;
Comments : SAME UNIT AS ABOVE IN 65-1;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Leg : 61 Top/Bottom Interval(mm): 0/ 180 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 599.18
Core: 66 Top of Core Depth (m) : 599.00
Sect: 1 Top of Section Depth(m): 599.00
LITHOLOGY: SEDIMENT;
VOLCANICLASTIC CLAYSTONE;
Leg : 61 Top/Bottom Interval(mm): 180/1500 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 600.50
Core: 66 Top of Core Depth (m) : 599.00
Sect: 1 Top of Section Depth(m): 599.18
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC DOLERITE;
Piece No. : PCE 1A (18-33), 1B (34-48), 1C (47-70), 1D (70-82),
2 (85-114), 3 (120-126), 4 (132-150);
Structure : MASSIVE BASALT SILL;
Texture : MICROPHYRIC, SUBOPHITIC DOLERITE, IN PCE 1A CONTACT
BETWEEN SEDIMENT AND BASALT IS WITHOUT GLASSY
MARGIN, GRAIN SIZE IS SLIGHTLY FINE;
Alteration : MOD;
Comments : CONTACT BETWEEN SEDIMENT AND BASALT IN PCE 1A, COLOR
DARK GREENISH GRAY 5G 4/1;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Groundmass : PLAGIOCLASE
CLINOPYROXENE
ALTERED GLASS IN GNDMASS;
Leg : 61 Top/Bottom Interval(mm): 0/1440 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 601.94
Core: 66 Top of Core Depth (m) : 599.00
Sect: 2 Top of Section Depth(m): 600.50
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC DOLERITE;
SAME AS ABOVE IN 66-1;
Piece No. : PCE 1 (2-32), 2 (36-40), 3A (41-52), 3B (52-57)
3B (65-70), 3C (70-73), 4 (75-100), 5 (102-132),
6 (138-141);
Structure : MASSIVE BASALT SILL;
Texture : MICROPHYRIC;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Leg : 61 Top/Bottom Interval(mm): 0/1440 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 601.94
Core: 66 Top of Core Depth (m) : 599.00
Sect: 2 Top of Section Depth(m): 600.50
LITHOLOGY: PLAG GLOMEROPHYRIC DOLERITE;
Piece No. : PCE 3B (57-65);
Texture : GLOMEROPHYRIC TEXTURE OF PLAG, SUBOPHITIC
DOLERITE;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE
Leg : 61 Top/Bottom Interval(mm): 0/1440 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 603.44
Core: 66 Top of Core Depth (m) : 599.00
Sect: 3 Top of Section Depth(m): 602.00
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC BASALT;
SAME AS ABOVE IN 66-1;
Piece No. : PCE 1 (3-41), 2A (43-51), 2B (50-72), 2C (73-75),
2D (75-115), 2E (113-120), 2F (120-134),
2G (134-142);
Structure : MASSIVE BASALT SILL;
Texture : MICROPHYRIC, SUBOPHITIC;
Alteration : MOD;
Leg : 61 Top/Bottom Interval(mm): 0/1430 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 604.93
Core: 66 Top of Core Depth (m) : 599.00
Sect: 4 Top of Section Depth(m): 603.50
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC DOLERITE;
SAME AS ABOVE IN 66-1;
Piece No. : PCE 1A (2-15), 1B (15-32), 1C (34-47), 1D (47-70),
1E (70-90), 1F (90-116), 1G (116-135), 1H (135-140);
Structure : MASSIVE BASALT SILL;
Texture : MICROPHYRIC, SUBOPHITIC DOLERITE, AGGREGATES OF
PYRITE AND GREEN CLAY(?) PATCH ARE OBSERVED;
Alteration : MOD TO EXT;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 606.40
Core: 66 Top of Core Depth (m) : 599.00
Sect: 5 Top of Section Depth(m): 605.00
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC DOLERITE;
SAME AS ABOVE IN 65-1;
Piece No. : PCES 1A (0-7), 1B (6-18), 1C (17-36), 1D (37-49),
1E (49-60), 1F (60-86), 1G (86-104), 1H (105-140);
Structure : MASSIVE BASALT SILL;
Texture : MICROPHYRIC, AGGREGATES OF PYRITE AND GREEN
CLAY PATCHES ARE OBSERVED, SUBOPHITIC DOLERITE;
Alteration : MOD TO BADLY;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Leg : 61 Top/Bottom Interval(mm): 0/ 850 Analyst: Tokuyama, H.
Hole: 462 Sample Midpoint (m) : 607.35
Core: 66 Top of Core Depth (m) : 599.00
Sect: 6 Top of Section Depth(m): 606.50
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC DOLERITE;
SAME AS ABOVE IN 66-1 EXCEPT 30-38CM;
Piece No. : PCES 1A (1-15), 1B (15-35), 1C (35-85);
Structure : MASSIVE BASALT SILL;
Texture : MICROPHYRIC, AT 30-38CM GLOMEROPHYRIC TEXTURE OF
PLAG(AS IN 66-2),SUBOPHITIC DOLERITE;
Alteration : MOD TO EXT;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Leg : 61 Top/Bottom Interval(mm): 0/1220 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 607.22
Core: 67 Top of Core Depth (m) : 606.00
Sect: 1 Top of Section Depth(m): 606.00
LITHOLOGY: APHYRIC DOLERITE;
Piece No. : PCES 1 (1-4), 2A (6-23), 2B (22-54), 2C (54-72),
2D (71-120);
Texture : APHYRIC, HOLOCRYSTALLINE, INTERVAL (44-74) 'SPOTTED'
GLOMEROPHYRIC TEXTURE, INTERVAL (50-54) 'SPOTTED'
TEXTURE, INTERVAL (68-72) 'SPOTTED' TEXTURE
WITH NON SPOTTED;
Alteration : MOD;
Comments : CONTACT BETWEEN SPOTTED AND NON SPOTTED TEXTURES IN
INTERVAL (68-72);
Leg : 61 Top/Bottom Interval(mm): 0/1350 Analyst: Robinson, P.T.
Hole: 462 Sample Midpoint (m) : 608.85
Core: 67 Top of Core Depth (m) : 606.00
Sect: 2 Top of Section Depth(m): 607.50
LITHOLOGY: APHYRIC DOLERITE;
SAME AS SECTION 1;
Piece No. : PCES 1 (0-41), 2 (45-135);
Texture : APHYRIC;
Alteration : MOD;
Comments : 90-94CM DOMINANT LITHOLOGY;
Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Shcheka, S.A.
Hole: 462 Sample Midpoint (m) : 610.40
Core: 68 Top of Core Depth (m) : 609.00
Sect: 1 Top of Section Depth(m): 609.00
LITHOLOGY: APHYRIC DOLERITE;
IDENTICAL TO SECTION 67-2;
Piece No. : PCE 1 (2-4), 2 (8-11), 3A (16-30), 3B (30-61),
3C (60-79), 3D (76-105), 3E (102-116),
3F (116-140);
Structure : CHLORITE+PYRITE VEINS, WITHIN CHLORITE VEINS PEELS
OF PYRITE ARE OFTEN PRESENT;
Texture : APHYRIC, FINE-GRAINED DOLERITE, SOME INTERVALS
ENRICHED IN PYX-PLAG GLOMEROPHYRIC AGGREGATES;
Alteration : EXT;
MORE ALTERED NEAR CHLORITE VEINS;
Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A.
Hole: 462 Sample Midpoint (m) : 612.00
Core: 68 Top of Core Depth (m) : 609.00
Sect: 2 Top of Section Depth(m): 610.50
LITHOLOGY: APHYRIC DOLERITE;
CONTINUATION OF PREVIOUS SECTION;
Piece No. : PCE 1A (0-55), 1B (55-80), 1C (80-110),
1D (110-150);
Structure : PYRITE-CHLORITE VEINS;
Texture : APHYRIC TO CPX-PLAG MICROPHYRIC DOLERITES,
CPX (OL?) GLOMEROPHYRIC AGGREGATES, MORE
COARSE (2-3MM) THAN CPX-PLAG ONES;
Alteration : EXT;
Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Shcheka, S.A.
Hole: 462 Sample Midpoint (m) : 613.40
Core: 68 Top of Core Depth (m) : 609.00
Sect: 3 Top of Section Depth(m): 612.00
LITHOLOGY: APHYRIC TO CPX-PLAG MICROPHYRIC DOLERITES;
CONTINUATION OF PREVIOUS SECTION;
Piece No. : PCE 1A (0-28), 1B (25-60), 1C (57-95), 1D (90-106),
1E (104-110), 1F (110-140);
Texture : APHYRIC, INTERVAL (41-55) AND ELSEWHERE MORE COARSE-
GRAINED AND ENRICHED IN DARK MINERAL-MICRODOLERITE
INTERVALS;
Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Shcheka, S.A.
Hole: 462 Sample Midpoint (m) : 614.95
Core: 68 Top of Core Depth (m) : 609.00
Sect: 4 Top of Section Depth(m): 613.50
LITHOLOGY: PLAG-CPX-OL MICROPHYRIC DOLERITE;
CONTINUED FROM PREVIOUS SECTION (68-3);
Piece No. : PCE 1A (0-50), 2 (51-71), 3 (75-90), 4 (92-110),
5 (111-145);
Texture : MICROPHYRIC;
Alteration : EXT;
Phenocrysts: PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Leg : 61 Top/Bottom Interval(mm): 0/ 810 Analyst: Shcheka, S.A.
Hole: 462 Sample Midpoint (m) : 614.81
Core: 69 Top of Core Depth (m) : 614.00
Sect: 1 Top of Section Depth(m): 614.00
LITHOLOGY: DOLERITES AND MICRODOLERITES;
Piece No. : PCE 1A (0-20), 1B (20-30), 1C (30-39), 1D (39-48),
2 (50-80);
Structure : TALC-TI MAGNETITE VEINS CONSIST OF TALC AND SMALL
AMOUNTS OF CHALCOPYRITE (BOTH MORE LATE) AND
OCTAHEDRONS OF MAGNETITE (0.5-3MM), THESE VEINS FILL
TWO SYSTEMS OF CONTRACTION FISSURES-SUBVERTICAL AND
SUBHORIZONTAL, CHLORITE-CLAY VEINS ARE MORE LATE AND
CUT THE TI-MAGNETITE;
Texture : APHYRIC, MEDIUM-GRAINED TO FINE-GRAINED DOLERITES
AND MICRODOLERITES;
Alteration : EXT;
Groundmass : PLAGIOCLASE (60-70%)
Size(mm): 3-5
3-5MM IN LENGTH, 0.5-2MM IN WIDTH, OFTEN
OCTAHEDRONS, FRESH;
CLINOPYROXENE (20-30%)
Size(mm): 1-3
EQUIDIMENSIONAL, SLIGHTLY ALTERED TO CHLORITE;
MAGNETITE (10-20%)
Size(mm): 0.5-2
OFTEN OCTAHEDRONS, FRESH;
PYRRHOTITE ( RARE%)
Size(mm): 0.5-1
RARE DISSEMINATED GRAINS OF PYRRHOT;
OLIVINE
Size(mm): 1-3
MORE COARSE TALC-PSEUDOMORPHS ARE PROBABLY OL;
Replacement: CHLORITE
CLAY
TALC
TITANOMAGNETITE
Alteration : PLAG AND MAGN ARE FRESH, CPX SLIGHTLY ALTERED;
Leg : 61 Top/Bottom Interval(mm): 0/ 910 Analyst: Shcheka, S.A.
Hole: 462 Sample Midpoint (m) : 616.41
Core: 69 Top of Core Depth (m) : 614.00
Sect: 2 Top of Section Depth(m): 615.50
LITHOLOGY: DOLERITE;
ALL FEATURES OF ROCK SAME AS IN PREVIOUS SECTION;
Piece No. : PCE 1A (0-45), 1B (45-66), 1C (65-85), 1D (85-91);
Texture : APHYRIC;
Alteration : EXT;
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