Leg : 61 Top/Bottom Interval(mm): 0/ 720 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 565.22 Core: 14 Top of Core Depth (m) : 563.00 Sect: 2 Top of Section Depth(m): 564.50 LITHOLOGY: MICRODOLERITE; BASALT SILL; Piece No. : PCE 1 (0-14), 2 (16-20), 3A (25-40), 3B (40-60), 3C (60-69); Structure : BASALT SILL, CUT BY NUMEROUS VEINS OF CALCITE (THICKEST)+CHLORITE+CLAY-CHLORITE-CALCITE; Texture : FINE-GRAINED MICRODOLERITE, INTERVAL (2-7) MORE FINE-GRAINED; Alteration : SLIGHTLY TO MOD; Groundmass : PLAGIOCLASE ( 60%) MICROPHENOS AND MICROLITES; CLINOPYROXENE ( 20%) MICROPHENOS AND INTERSTITIAL; MAGNETITE ( 8-10%) SMALL IRREGULAR GRAINS; PYROXENE SLIGHTLY ALTERED TO LIGHT GREEN SMEC; Replacement: CALCITE CHLORITE CLAY MINERALS SMECTITE Minerals Replaced: PYX Leg : 61 Top/Bottom Interval(mm): 0/ 110 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 566.61 Core: 15 Top of Core Depth (m) : 566.50 Sect: 1 Top of Section Depth(m): 566.50 LITHOLOGY: SEDIMENT; Leg : 61 Top/Bottom Interval(mm): 110/1490 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 567.99 Core: 15 Top of Core Depth (m) : 566.50 Sect: 1 Top of Section Depth(m): 566.61 LITHOLOGY: BASALT SILL; Piece No. : PCE 1A (13-30), 1B (30-37), 2A (40-55), 2B (55-66), 2C (66-76), 2D (76-86), 2E (86-97), 2F (97-114), 2G (115-122), 2H (123-149); Structure : BASALT SILL, MANY VEINS FROM 11-60CM OF CALCITE, CHLORITE, AND COMPLEX VEINS OF CALCITE, CHLORITE, ETC., BELOW 60CM THE VEINS ARE LESS ABUNDANT; Texture : APHYRIC, AT 36CM ARE CHLORITE AND CLAY HALOS, BELOW 60CM THE BASALT IS APHANITIC; Alteration : MOD; Replacement: CHLORITE CALCITE Leg : 61 Top/Bottom Interval(mm): 0/ 240 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 568.24 Core: 15 Top of Core Depth (m) : 566.50 Sect: 2 Top of Section Depth(m): 568.00 LITHOLOGY: BASALT SILL; Leg : 61 Top/Bottom Interval(mm): 0/ 240 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 568.24 Core: 15 Top of Core Depth (m) : 566.50 Sect: 2 Top of Section Depth(m): 568.00 LITHOLOGY: MICRODOLERITE; Piece No. : PCE 1 (1-7), 2 (11-21); Structure : VEINS OF CALCITE WITH PYRITE; Texture : DIABASIC, SLIGHTLY MORE COARSE-GRAINED FROM 4-5CM; Alteration : MOD; Replacement: CALCITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1420 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 573.42 Core: 16 Top of Core Depth (m) : 572.00 Sect: 1 Top of Section Depth(m): 572.00 LITHOLOGY: MICRODOLERITE; BASALT SILL; MICRODOLERITES SAME AS ABOVE (15-2); Piece No. : PCE 1A (0-45), 1B (42-55), 1C (55-70), 1D (70-80), 1E (80-84), 1F (85-95), 1G (95-120), 1H (120-140); Structure : BASALT SILL, QUARTZ-CHLORITE-CLAY-CALCITE AND QUARTZ-DIORITE LIKE VEINS APPEAR, QUARTZ-DIORITE LIKE VEINS CONSIST OF QUARTZ AND PLAG, PARTLY ALTERED TO CALCITE AND BRIGHT GREEN SMEC; Texture : MICRODOLERITES; Alteration : MOD ALTERATION IS OBSERVED NEAR VEINS; Replacement: CALCITE Minerals Replaced: QUARTZ PLAGIOCLASE Minerals Replaced: SMEC BRIGHT GREEN SMEC; PYROXENE Minerals Replaced: SMEC GREEN SMEC; Leg : 61 Top/Bottom Interval(mm): 0/ 450 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 573.95 Core: 16 Top of Core Depth (m) : 572.00 Sect: 2 Top of Section Depth(m): 573.50 LITHOLOGY: MICRODOLERITE; MICRODOLERITES SAME AS ABOVE (16-1); Piece No. : PCE 1A (0-8), 1B (5-35), 1C (35-41); Structure : BASALT SILL; Texture : APHYRIC, MICRODOLERITE; Leg : 61 Top/Bottom Interval(mm): 0/1350 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 575.35 Core: 17 Top of Core Depth (m) : 574.00 Sect: 1 Top of Section Depth(m): 574.00 LITHOLOGY: MASSIVE SUBOPHITIC DOLERITE; BASALT SILL; Piece No. : PCE 1A (0-13), 1B (14-57), 1C (57-79), 1D (77-95), 1E (95-104), 1F (105-115), 1G (111-122), 1H (122-135); Structure : MASSIVE, BASALT SILL, SOME VEINS ARE OF CALCITE+ CHLORITE+CLAY (SMECTITE OR PARAGONITE), Texture : SULFIDE (PYRITE) OCCURS IN SOME VEINS; SUBOPHITIC, SPARSELY SPOTTED WITH CPX AGGREGATES AND PLAG PHENOS, MICROPHENOS ARE PLAG AND CPX; Alteration : SLIGHTLY TO MOD; Comments : CHLORITE VEINS ARE MEDIUM BLUISH GRAY (5B 5/1), CLAY VEINS ARE DARK GREEN AND LIGHT OLIVE BROWN (5Y 5/6); Phenocrysts: PLAGIOCLASE CLINOPYROXENE MICROPHENOS; Groundmass : PLAGIOCLASE CLINOPYROXENE TITANOMAGNETITE MICROLITES, IN ABUNDANCE PLAG>CPX>TI-MAGN; Replacement: CALCITE CHLORITE CLAY MINERALS PYRITE Groundmass : CLINOPYROXENE AGGREGATES; TITANOMAGNETITE Leg : 61 Top/Bottom Interval(mm): 0/1070 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 576.57 Core: 17 Top of Core Depth (m) : 574.00 Sect: 2 Top of Section Depth(m): 575.50 LITHOLOGY: MASSIVE DOLERITE; BASALT SILL; AS MENTIONED IN SECTION 17-1; Piece No. : PCE 1 (0-22), 2A (25-35), 2B (35-44), 3A (45-61), Texture : SUBOPHITIC; Structure : MASSIVE, BASALT SILL, IT IS NOT CLEAR WHETHER THE SILL LAYER OF THIS SECTION IS DIFFERENT FROM THAT OF LAST SECTION, VEINS PRESENT; Phenocrysts: PLAGIOCLASE CLINOPYROXENE MICROPHENOS; Replacement: CALCITE CHLORITE CLAY MINERALS PYRITE Groundmass : CLINOPYROXENE AGGREGATES; TITANOMAGNETITE Replacement: CLAY MINERALS SMECTITE Minerals Replaced: PYX Leg : 61 Top/Bottom Interval(mm): 0/ 50 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 576.05 Core: 18 Top of Core Depth (m) : 576.00 Sect: 1 Top of Section Depth(m): 576.00 LITHOLOGY: MASSIVE DOLERITE; BASALT SILL; Piece No. : PCE 1 (0-4); Structure : MASSIVE BASALT SILL, VEINED; Texture : APHYRIC WITH MICROPHENOS OF CPX AND PLAG, SUBOPHITIC DOLERITE; Alteration : SLIGHTLY; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS; Leg : 61 Top/Bottom Interval(mm): 50/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 577.50 Core: 18 Top of Core Depth (m) : 576.00 Sect: 1 Top of Section Depth(m): 576.05 LITHOLOGY: MASSIVE DOLERITE; BASALT SILL; Piece No. : PCE 2A (5-22), 2B (23-31), 2C (32-46), 2D (46-54), 4 (54-70), 4 (74-80), 5A (84-96), 5B (96-114), 5C (114-150); Structure : MASSIVE BASALT SILL, SOME VEINS OF CALCITE+CLAY+ CHLORITE, IN SOME VEINS SULFIDE (PYRITE?) OCCURS; Texture : SPARSE SPOTS (MORE FREQUENT THAN CORE 17) OF CPX AGGREGATES AND PHENOS (<2MM), THIS DOLERITE IS MADE OF PHENOS OF CPX AND MICROPHENOS OF CPX+PLAG; OF CPX AND MICROPHENOS OF CPX AND PLAG; Alteration : SLIGHTLY TO MOD ALTERATION SAME AS IN SECTION 17-1; Comments : COLOR IS SAME AS IN SECTION 17-1; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE Groundmass : CLINOPYROXENE MICROLITES; PLAGIOCLASE MICROLITES; TITANOMAGNETITE MICROLITES; CPX=PLAG>TI-MAGN IN ABUNDANCE; Replacement: PYRITE ID UNCERTAIN, IN VEINS; CALCITE CHLORITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/ 900 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 578.40 Core: 18 Top of Core Depth (m) : 576.00 Sect: 2 Top of Section Depth(m): 577.50 LITHOLOGY: MASSIVE DOLERITE; BASALT SILL, SAME AS SECTION 18-1; Piece No. : PCE 1 (0-9), 2A (10-32), 2B (32-70), 2C (70-88); Structure : MASSIVE BASALT SILL, VEINS PRESENT; Texture : APHANITIC, PHYRIC AS IN SECTION 18-2; Alteration : SLIGHTLY TO MOD; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE Groundmass : CLINOPYROXENE MICROLITES; PLAGIOCLASE MICROLITES; TITANOMAGNETITE MICROLITES; CPX=PLAG>TI-MAGN IN ABUNDANCE; Replacement: PYRITE ID UNCERTAIN, IN VEINS; CALCITE CHLORITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1430 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 579.43 Core: 19 Top of Core Depth (m) : 578.00 Sect: 1 Top of Section Depth(m): 578.00 LITHOLOGY: BASALT SILL (MASSIVE); Piece No. : PCE 1 (1-72), 2 (72-141); Structure : MASSIVE BASALT (SILL), FROM 45 TO 65CM IS A VEIN WITH DARK GREEN EDGES AND A LIGHT GREEN (10G 8/2) INTERIOR (CELAD?,ZEOLITE?), FROM 75 TO 85CM THERE ARE CHLORITE+PALE GREEN MATERIAL+PYRITE VEINS, FROM 85 TO 92CM THERE ARE CHLORITE+PALE GREEN MINERAL VEINS, AND FROM 118 TO 150CM THE VEINS ALSO HAVE PYRITE BLOTCHES; Replacement: PYRITE CHLORITE CELADONITE ID UNCERTAIN; ZEOLITE ID UNCERTAIN; Leg : 61 Top/Bottom Interval(mm): 0/1310 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 580.81 Core: 19 Top of Core Depth (m) : 578.00 Sect: 2 Top of Section Depth(m): 579.50 LITHOLOGY: BASALT SILL; Piece No. : PCE 1 (0-50), 2 (43-128); Structure : MASSIVE BASALT (SILL), VEINS ARE OF CHLORITE+PALE GREEN MATERIAL+PYRITE, FROM 0 TO 50CM VEINS OCCUR (THROUGHOUT) APPROXIMATELY EVERY 2CM; Texture : INTERVAL (77-105) IS FINE-GRAINED; Alteration : ALTERED; Replacement: PYRITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 582.49 Core: 20 Top of Core Depth (m) : 581.00 Sect: 1 Top of Section Depth(m): 581.00 LITHOLOGY: MASSIVE BASALT SILL; Piece No. : PCE 1A (0-5), 1B (5-15), 2A (20-34), 2B (34-50), 2C (50-60), 2D (60-68), 2E (68-78), 2F (78-85), 2G (85-96), 3 (100-113), 4A (115-130), 4B (130-140), 4C (140-149); Structure : MASSIVE BASALT SILL, VEINS OF CHLORITE+PYRITE OCCUR WHICH ARE 0.5-2MM THICK; Texture : FINE-GRAINED, FROM 55CM AND DOWNWARD, THE ROCK APPEARS TO SUBTLY BECOME FINER IN GRAIN-SIZE AND MORE LEUCOCRATIC; Alteration : MOD; Replacement: CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1420 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 583.92 Core: 20 Top of Core Depth (m) : 581.00 Sect: 2 Top of Section Depth(m): 582.50 LITHOLOGY: MASSIVE BASALT SILL; Piece No. : PCE 1A (0-11), 1B (11-22), 1C (24-26), 2 (30-49), 3A (42-48), 3B (49-60), 3C (61-65), 3D (65-80), 3E (80-90), 3F (90-97), 3G (98-110), 3H (110-117), 3I (118-128), 4 (130-141); Structure : MASSIVE BASALT SILL, FROM 100 TO 120CM ARE 1 TO 2MM THICK VEINS OF CHLORITE+PYRITE; Texture : FINE-GRAINED; Alteration : MOD; Replacement: CHLORITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 140 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 586.14 Core: 21 Top of Core Depth (m) : 586.00 Sect: 1 Top of Section Depth(m): 586.00 LITHOLOGY: SEDIMENT; Leg : 61 Top/Bottom Interval(mm): 140/ 960 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 586.96 Core: 21 Top of Core Depth (m) : 586.00 Sect: 1 Top of Section Depth(m): 586.14 LITHOLOGY: BASALT SILL; Piece No. : PCE NO PCE NUMBERS ASSIGNED; Structure : THREE BASALT SILLS, DARK VEINS PRESENT; Texture : GRAIN SIZE INCREASES FROM 42 TO 93CM WHERE A GLASSY CHILL MARGIN EXISTS FROM 93 TO 96CM; Comments : UNIT 1 OF 4 UNITS; Leg : 61 Top/Bottom Interval(mm): 960/1230 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 587.23 Core: 21 Top of Core Depth (m) : 586.00 Sect: 1 Top of Section Depth(m): 586.96 LITHOLOGY: BASALT SILL; Piece No. : PCE NO PCE NUMBERS ASSIGNED; Structure : BASALT SILL, VEINED BASALT; Texture : NO APPARENT TOP OR LOWER CHILL MARGINS INTACT-ACTUALLY TOP AND BOTTOM OF THIS UNIT ARE MISSING; Comments : UNIT 2 OF 4 UNITS IN THIS SECTION; Leg : 61 Top/Bottom Interval(mm): 1230/1500 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 587.50 Core: 21 Top of Core Depth (m) : 586.00 Sect: 1 Top of Section Depth(m): 587.23 LITHOLOGY: BASALT SILL; RED "BAKED" SEDIMENT (123-125); Piece No. : PCE NO PCE NUMBERS ASSIGNED; Structure : BASALT SILL; Texture : THE UPPER BOUNDARY IS MARKED BY A GLASSY MARGIN WITH RED "BAKED" SEDIMENT (123-125); Comments : UNIT 3 OF 4 UNITS IN THIS SECTION; Leg : 61 Top/Bottom Interval(mm): 0/ 260 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 587.76 Core: 21 Top of Core Depth (m) : 586.00 Sect: 2 Top of Section Depth(m): 587.50 LITHOLOGY: BASALT SILL FRAGMENTS AND RED BAKED SEDIMENT; Piece No. : PCE NO PCE NUMBERS ASSIGNED; Texture : THE FRAGMENTS IN THE TOP OF THIS SECTION INCLUDE: 1) TWO BASALT FRAGMENTS WHICH CONTAIN GLASSY MARGINS, 2) TWO BASALT FRAGMENTS WHICH LACK GLASSY MARGINS, AND 3) ONE SMALL FRAGMENT OF RED (10R4/6) BAKED SEDIMENT WITH A PORTION OF GLASSY MARGIN OF A SILL, NONE OF THESE FRAGMENTS ARE IN STRATIGRAPHIC ORDER AND THEREFORE IT IS IMPOSSIBLE TO DISTINGUISH IF THESE MISCELLANEOUS FRAGMENTS REPRESENT THE BOTTOM OF A CHILLED MARGIN OF UNIT 3 OR THE UPPER CHILLED MARGIN OF UNIT 4, IT IS LIKELY THAT BOTH ARE PRESENT; Leg : 61 Top/Bottom Interval(mm): 260/ 580 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 588.08 Core: 21 Top of Core Depth (m) : 586.00 Sect: 2 Top of Section Depth(m): 587.76 LITHOLOGY: BASALT SILL; Piece No. : PCE NO PCE NUMBERS ASSIGNED; Structure : BASALT SILL; Texture : AT (26-29) GRAIN SIZE INCREASES DOWNWARD; Comments : UNIT 4; Leg : 61 Top/Bottom Interval(mm): 0/ 920 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 588.92 Core: 22 Top of Core Depth (m) : 588.00 Sect: 1 Top of Section Depth(m): 588.00 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1 (0-5), 2 (5-14), 3 (16-19), 4A (21-27), 4B (27-38), 4C (38-45), 4D (45-56), 4E (56-74), 4F (75-82), 4G (80-92); Structure : MASSIVE DOLERITE SILL WITH VEINS; Texture : APHYRIC, CHILLED MARGIN AND TRANSITIONAL ZONE OF SILL, GRAIN SIZE BECOMES COARSER TOWARD CENTER OF THE SECTION; Alteration : SLIGHTLY TO MOD; Leg : 61 Top/Bottom Interval(mm): 920/1350 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 589.35 Core: 22 Top of Core Depth (m) : 588.00 Sect: 1 Top of Section Depth(m): 588.92 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 4H (92-111), TOP 14CM OF 4I (111-142); Structure : MASSIVE BASALT SILL; Texture : AT CHILLED MARGINS CPX>>PLAG WHILE AT THE TRANSITION ZONE (IN 0-90CM INTERVAL) CPX=PLAG, THE RATIO OF CPX PLAG MICROPHENOS MAY DECREASE TOWARD THE INTERIOR OF THE SILL, APHANITIC, APHYRIC TO MICROPHYRIC; Alteration : MOD; Comments : APHYRIC BASALT IS GREENISH GRAY (5G4/1) AND APHANITIC BASALT IS MED BLUISH GRAY (5B5/1), LOWER SILL BOUNDARY AT 135CM IS SHARP, THE 135CM INTERVAL IS THE BOUNDARY BETWEEN SILL INTERIOR AND SLIGHTLY APHYRIC BASALT FROM 135 TO 145CM; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE Leg : 61 Top/Bottom Interval(mm): 1350/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 589.50 Core: 22 Top of Core Depth (m) : 588.00 Sect: 1 Top of Section Depth(m): 589.35 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE BOTTOM 7CM OF 4I (111-142), 4J (142-150); Structure : MASSIVE BASALT SILL; Texture : APHYRIC; Comments : APHYRIC BASALT IS GREENISH GRAY (5G4/1); Alteration : MOD; Leg : 61 Top/Bottom Interval(mm): 0/1100 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 590.60 Core: 22 Top of Core Depth (m) : 588.00 Sect: 2 Top of Section Depth(m): 589.50 LITHOLOGY: SEDIMENT; Leg : 61 Top/Bottom Interval(mm): 1100/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 591.00 Core: 22 Top of Core Depth (m) : 588.00 Sect: 2 Top of Section Depth(m): 590.60 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); EACH ZONE IS SAME AS MENTIONED IN 22-1; Piece No. : PCE 1 (110-125), 2A (126-143), 2B (130-150); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : DOLERITIC, INTERVAL (110-115) IS A CHILLED MARGIN, INTERVAL (115-130) IS A TRANSITIONAL ZONE FROM THE CHILLED MARGIN ABOVE TO THE APHANITIC ZONE AT (130-150); Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 592.45 Core: 22 Top of Core Depth (m) : 588.00 Sect: 3 Top of Section Depth(m): 591.00 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); MINERAL ASSEMBLAGES, ALTERATION, AND COLOR ARE THE SAME AS MENTIONED IN SECTION 22-1; Piece No. : PCE 1A (0-10), 1B (10-25), 1C (26-41), 1D (41-47), 1E (47-61), 1F (61-75), 1G (75-85), 1H (85-94), 1I (94-99), 1J (100-115), 1K (115-135), 1L (135-145); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : PCE 1A IS MEDIUM TO FINE-GRAINED, PCE 1F IS SLIGHTLY COARSE-GRAINED, PCE 1L IS MEDIUM TO FINE-GRAINED, AL 3 PCES ARE APHANITIC, GRAIN SIZE BECOMES GRADUALLY COARSER FROM THE TOP OF THE SECTION TO 70CM AND THEN DECREASES TOWARD THE BOTTOM OF THE SECTION; Alteration : MOD; Leg : 61 Top/Bottom Interval(mm): 0/1410 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 593.91 Core: 22 Top of Core Depth (m) : 588.00 Sect: 4 Top of Section Depth(m): 592.50 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); MINERAL ASSEMBLAGES ARE THE SAME AS IN 22-1; Piece No. : PCE 1A (0-21), 1B (21-50), 1C (50-85), 1D (85-100), 1E (100-125), 1F (125-141); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : FROM 0 TO 90CM MEDIUM TO FINE GRAIN SIZE, FROM 90CM TO 124CM SLIGHTLY COARSE GRAIN SIZE, AND 125CM TO 150CM IS A TRANSITIONAL ZONE; Alteration : MOD; Leg : 61 Top/Bottom Interval(mm): 0/1250 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 595.25 Core: 22 Top of Core Depth (m) : 588.00 Sect: 5 Top of Section Depth(m): 594.00 LITHOLOGY: MASSIVE BASALT (DOLERITE); MINERAL ASSEMBLAGES, ALTERATION AND COLOR AS MENTIONED IN SECTION 22-1; Piece No. : PCE 1A (0-20), 1B (21-50), 1C (50-65), 1D (66-80), 1E (80-95), 1F (96-122); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : INTERVAL (0-25) IS FINE-GRAINED, INTERVAL (25-124) I FINE TO MED-GRAINED; Alteration : MOD SAME AS IN SECTION 22-1; Comments : COLOR SAME AS IN SECTION 22-1; Leg : 61 Top/Bottom Interval(mm): 0/ 230 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 597.23 Core: 23 Top of Core Depth (m) : 597.00 Sect: 1 Top of Section Depth(m): 597.00 LITHOLOGY: SEDIMENT; Comments : BAKED SEDIMENT VERY DARK RED (5R2/6) AT 22-23CM; Leg : 61 Top/Bottom Interval(mm): 230/ 600 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 597.60 Core: 23 Top of Core Depth (m) : 597.00 Sect: 1 Top of Section Depth(m): 597.23 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1A (23-60); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : APHANITIC, FROM 21-23CM (PCE 1A) BASALT IS SLIGHTLY PHYRIC, TRANSITIONAL, FROM 30-60CM (PCE 1A) BASALT IS FINE-GRAINED; Alteration : MOD; Phenocrysts: CLINOPYROXENE MICROPHENOS; PLAGIOCLASE MICROPHENOS, THE RATIO OF CPX:PLAG OF MICROPHENOS DECREASES TOWARD THE INTERIOR OF THE SILL; Leg : 61 Top/Bottom Interval(mm): 600/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 598.50 Core: 23 Top of Core Depth (m) : 597.00 Sect: 1 Top of Section Depth(m): 597.60 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1B ((57-86), 1C (86-94), 1D (94-102), 1E (102-121), 1F (121-130), 1G (130-142), 1H (142-150); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : FINE TO MEDIUM GRAIN SIZE (APHANITIC), GLASS; Alteration : MOD SAME AS IN SECTION 22-1; Comments : COLOR SAME AS IN SECTION 22-1; Phenocrysts: CLINOPYROXENE MICROPHENOS; PLAGIOCLASE MICROPHENOS, THE RATIO OF CPX:PLAG DECREASES TOWARD THE INTERIOR OF THE SILL; Groundmass : PLAGIOCLASE MICROLITES; CLINOPYROXENE MICROLITES; MAGNETITE MICROLITES; Leg : 61 Top/Bottom Interval(mm): 0/ 740 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 599.24 Core: 23 Top of Core Depth (m) : 597.00 Sect: 2 Top of Section Depth(m): 598.50 LITHOLOGY: MASSIVE DOLERITE SILL (DOLERITE); Piece No. : PCE 1A (0-30), 1B (30-60), 1C (60-73); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : SPARSELY PHYRIC, VARIES TO APHYRIC ABOUT 55-74CM ZONE, 0-50CM IS FINE-MEDIUM GRAINED, INTERVAL 50-70CM IS FINER GRAINED (TRANSITIONAL ZONE), INTERVAL 70-74CM IS SPARSELY PHYRIC TO APHYRIC; Alteration : MOD SAME AS IN SECTION 22-1; Comments : COLOR SAME AS IN SECTION 22-1; Phenocrysts: CLINOPYROXENE PLAGIOCLASE Leg : 61 Top/Bottom Interval(mm): 740/ 910 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 599.41 Core: 23 Top of Core Depth (m) : 597.00 Sect: 2 Top of Section Depth(m): 599.24 LITHOLOGY: SEDIMENT; Leg : 61 Top/Bottom Interval(mm): 910/1450 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 599.95 Core: 23 Top of Core Depth (m) : 597.00 Sect: 2 Top of Section Depth(m): 599.41 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); MINERAL ASSEMBLAGE, COLOR, ALTERATION, AND COLOR ARE SAME AS IN 23-1; Piece No. : PCE 2A (91-100), 2B (100-108), 2C (109-118), 2D (118-150); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : SPARSELY PHYRIC TO APHYRIC, GRAIN SIZE BECOMES GRADUALLY COARSER TOWARD THE BOTTOM OF THIS SECTION; Alteration : MOD SAME AS IN SECTION 22-1; Comments : COLOR SAME AS IN SECTION 22-1; Phenocrysts: CLINOPYROXENE PLAGIOCLASE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 601.50 Core: 23 Top of Core Depth (m) : 597.00 Sect: 3 Top of Section Depth(m): 600.00 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); COLOR AND MINERAL ASSEMBLAGE ARE THE SAME AS IN SECTION 23-1; Piece No. : PCE 1A (0-5), 1B (6-16), 1C (16-22), 2A (24-34), 2B (35-43), 3 (47-42), 4A (55-63), 4B (63-70), 5 (72-85), 6 (85-95), 7 (99-105), 8 (107-112), 9 (115-117), 10 (120-123), 11 (125-141), 12 (145-150); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : MICROPHYRIC, FINE TO MEDIUM-GRAINED DOLERITE; Alteration : MOD; EXT; PCE 7 AT 98CM TO 104CM IS BADLY ALTERED TO CLAY; Comments : COLOR SAME AS IN SECTION 23-1; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS, RATIO OF CPX:PLAG<=1; Replacement: CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1000 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 602.50 Core: 23 Top of Core Depth (m) : 597.00 Sect: 4 Top of Section Depth(m): 601.50 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); COLOR, MINERAL ASSEMBLAGE, AND ALTERATION ARE THE SAME AS IN SECTION 23-1; Piece No. : PCE 1 (1-5), 2 (10-15), 3A (16-27), 3B (28-36), 3C (36-42), 3D (42-70), 3E (70-80), 4 (81-92); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : PCES 1-3C ARE FINE TO MEDIUM-GRAINED AND ARE MICROPHYRIC, IN PCES 1D TO 4 BASALT HAS A MEDIUM TO COARSE GRAIN SIZE AND INCLUDES CPX PHENOS; Alteration : MOD SAME AS IN SECTION 23-1; Comments : COLOR SAME AS IN SECTION 23-1; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE RATIO OF CPX:PLAG<1; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 607.50 Core: 24 Top of Core Depth (m) : 606.00 Sect: 1 Top of Section Depth(m): 606.00 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); APHYRIC MICRODOLERITES; Piece No. : 2D (35-50), 2E (50-98), 2F (92-110), 2G (110-125), 3 (125-141), 4 (145-150); Structure : MASSIVE BASALT SILL WITH THIN VEINS (0.5-2MM) WHICH CONSIST OF CHLORITE AND PYRITE, BUT QUARTZ IN THE THICKER VEINS; Texture : APHYRIC, MICRODOLERITES ARE FINE TO MEDIUM GRAINED, INTERVALS (24-32) AND (80-107) ARE MORE FINE-GRAINED; Alteration : EXT; Groundmass : PYROXENE Replacement: CHLORITE Minerals Replaced: PYX PYRITE QUARTZ Leg : 61 Top/Bottom Interval(mm): 0/1410 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 608.91 Core: 24 Top of Core Depth (m) : 606.00 Sect: 2 Top of Section Depth(m): 607.50 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); SAME AS SECTION 24-1; Piece No. : PCE 1 (0-20), 2 (20-30), 3A (32-60), 3B (61-70), 4A (71-75), 4B (72-80), 5A (82-106), 5B (106-122), 5C (122-127), 5D (125-140); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : MICRODOLERITES; Alteration : EXT BOTTOM OF PCE 1, TOP 15CM OF PCE 3A, AND PCES 3B-5A; FRESH REMAINDER IS FRESH; Comments : SAME UNIT AS 24-1; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 610.50 Core: 24 Top of Core Depth (m) : 606.00 Sect: 3 Top of Section Depth(m): 609.00 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1A (0-6), 1B (6-10), 1C (10-30), 2A (33-45), 2B (45-50), 2C (50-60), 2D (60-73), 2E (74-85), 3 (86-99), 4 (101-107), 5A (110-122), 5B (122-131), 5C (131-150); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : FINE TO MEDIUM-GRAINED MICRODOLERITES, MICRODOLERITE IN INTERVALS (0-30) AND (110-150) ARE FINER GRAINED; Alteration : EXT; Comments : SAME UNIT AS SECTION 24-2; Leg : 61 Top/Bottom Interval(mm): 0/ 670 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 611.17 Core: 24 Top of Core Depth (m) : 606.00 Sect: 4 Top of Section Depth(m): 610.50 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); SAME MICRODOLERITES AS SECTION 24-3; Piece No. : PCE 1 (0-5), 2 (6-17), 3A (20-35), 3B (35-46), 4 (49-65); Structure : MASSIVE BASALT SILL WITH VEINS; Texture : FINE TO MEDIUM-GRAINED MICRODOLERITES, INTERVAL (45-65) IS FINE-GRAINED, COARSER PYX SPOTS OCCUR WITHIN MEDIUM-GRAINED INTERVALS; Alteration : EXT; Comments : MICRODOLERITES OF CORE 24 BELONG TO A SINGLE SILL AND GRAIN SIZE VARIATIONS ARE COMMON; Groundmass : PYROXENE PYX SPOTS OCCUR WITHIN MED-GRAINED INTERVALS; Leg : 61 Top/Bottom Interval(mm): 0/ 520 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 615.52 Core: 25 Top of Core Depth (m) : 615.00 Sect: 1 Top of Section Depth(m): 615.00 LITHOLOGY: PLAG-CPX SPARSELY PHYRIC BASALT; Piece No. : PCE 1 (0-8), 2 (10-15), 3 (17-21), 4 (25-27), 5 (30-43), 6 (45-51); Structure : MASSIVE BASALT SILL; Texture : SPARSELY PHYRIC, MEDIUM-GRAINED; Alteration : ALTERED, HIGHER COLOR INDEX APPEARS TO BE A RESULT OF ALTERATION; Comments : COLOR INDEX IS HIGHER THAN BEFORE, AND APPEARS TO BE CREATED BY ALTERATION; Phenocrysts: PLAGIOCLASE ( <1%) Size(mm): 0.77 CLINOPYROXENE ( <1%) Size(mm): 0.77 Leg : 61 Top/Bottom Interval(mm): 520/ 740 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 615.74 Core: 25 Top of Core Depth (m) : 615.00 Sect: 1 Top of Section Depth(m): 615.52 LITHOLOGY: DOLERITE FRAGMENTS; Piece No. : PCE 7 (53-73); Structure : MASSIVE BASALT SILL; Texture : DOLERITE FRAGMENTS, SOME OF WHICH ARE FINER GRAINED; Comments : POSSIBLE SILL BOUNDARY IN THIS SECTION SUGGESTED BY SOME DOLERITE FRAGMENTS WITH FINE GRAIN SIZE; Leg : 61 Top/Bottom Interval(mm): 740/1310 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 616.31 Core: 25 Top of Core Depth (m) : 615.00 Sect: 1 Top of Section Depth(m): 615.74 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; DOLERITE; Piece No. : PCE 8 (75-86), 9 (90-99), 10 (101-117), 11 (119-131); Structure : MASSIVE BASALT SILL; Texture : SPARSELY PHYRIC, MEDIUM-GRAINED DOLERITE; Comments : THIS DOLERITE IS MORE LEUCOCRATIC THAN THE PREVIOUS UNIT; Phenocrysts: CLINOPYROXENE ( 1%) Size(mm): <0.5-1 MOST ARE <0.5MM, BUT SOME ARE 1MM IN SIZE; Leg : 61 Top/Bottom Interval(mm): 0/ 200 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 626.20 Core: 27 Top of Core Depth (m) : 626.00 Sect: 1 Top of Section Depth(m): 626.00 LITHOLOGY: CAVINGS; Leg : 61 Top/Bottom Interval(mm): 200/ 480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 626.48 Core: 27 Top of Core Depth (m) : 626.00 Sect: 1 Top of Section Depth(m): 626.20 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1 (21-25), 2 (29-32), 3 (35-40), 4 (43-47); Structure : MASSIVE BASALT SILL, FEW CLAY VEINS; Texture : DOLERITE HAS A FINER GRAIN SIZE, A FEW PHENOS (<<1%,<0.5MM) OF PLAG+CPX; Alteration : MOD; Comments : MORE MELONOCRATIC (HIGHER COLOR INDEX) THAN BELOW 48CM; Phenocrysts: CLINOPYROXENE ( <<1%) Size(mm): <0.5 PLAGIOCLASE ( <<1%) Size(mm): <0.5 Leg : 61 Top/Bottom Interval(mm): 480/1350 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 627.35 Core: 27 Top of Core Depth (m) : 626.00 Sect: 1 Top of Section Depth(m): 626.48 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); CPX-PLAG SPARSELY PHYRIC BASALT; Piece No. : PCE 5 (50-57), 6 (60-70), 7 (71-80), 8 (82-99), 9 (101-110), 10 (112-120), 11 (121-130); Structure : MASSIVE BASALT SILL, VEIN OF CALCITE+GREEN CLAY+ PYRITE+CHLORITE AT 52CM; Texture : SPARSELY PHYRIC, MANY AMOEBOID CLAY PATCHES (1-2MM), FROM 48 TO 85CM THE GRAIN SIZE IS COARSER THAN ABOVE 48CM AND GRAIN SIZE BELOW 85CM DECREASES DOWNWARD; Alteration : MOD; Phenocrysts: CLINOPYROXENE Size(mm): <0.5 A FEW PERCENT OF CPX PHENOS; PLAGIOCLASE ( RARE%) Replacement: CALCITE CLAY GREEN CLAY; CHLORITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1430 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 628.93 Core: 27 Top of Core Depth (m) : 626.00 Sect: 2 Top of Section Depth(m): 627.50 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1 (0-18), 2 (20-29), 3 (30-36), 4 (40-45), 5 (48-55), 6 (57-80), 7 (72-91), 8 (93-101), 9 (104-128), 10 (130-141); Structure : MASSIVE BASALT SILL, CLAY AND CLAY+CHLORITE VEINS; Texture : FROM 0 TO 100CM GRAIN SIZE DECREASES DOWNWARD, FROM 100 TO 130CM IS A ZONE OF FINER GRAIN SIZE, AND BELO 130CM GRAIN SIZE INCREASES DOWNWARD; Alteration : ALTERED; Replacement: CLAY CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 630.49 Core: 27 Top of Core Depth (m) : 626.00 Sect: 3 Top of Section Depth(m): 629.00 LITHOLOGY: PLAG-CPX SPARSELY PHYRIC DOLERITE; MASSIVE BASALT; Piece No. : PCE 1 (0-21), 2 (25-52), 3 (54-81), 4 (83-106), 5 (108-130), 6 (132-149); Structure : MASSIVE, THIN CLAY VEINS PERMEATE ALL ROCKS; Texture : SPARSELY PHYRIC, INCREASING GRAIN SIZE DOWNWARD; Alteration : SLIGHTLY; Comments : MORE MELANOCRATIC DOWNWARD; Phenocrysts: CLINOPYROXENE PLAGIOCLASE Leg : 61 Top/Bottom Interval(mm): 0/1440 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 631.44 Core: 28 Top of Core Depth (m) : 630.00 Sect: 1 Top of Section Depth(m): 630.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-31), 2 (55-63), 3 (65-68), 4 (70-100), 5A (100-115), 5B (115-128), 6A (130-138); Structure : MASSIVE BASALT SILL WITH VEINS WHICH ARE FILLED WITH CALCITE+CHLORITE+PYRITE+CLAY(SMEC OR PALAG); Texture : APHYRIC TO MICROPHYRIC, FINE TO MEDIUM-GRAINED DOLERITE, MICROLITES OF PLAG+CPX+MAGN; Alteration : SLIGHTLY; Comments : COLOR MEDIUM BLUISH GRAY 5B5/1; Phenocrysts: CLINOPYROXENE MICROPHENOS, PARTLY ALTERED TO CLAYS; PLAGIOCLASE MICROPHENOS, RATIO OF CPX TO PLAG IS ABOUT 1; Replacement: CALCITE CHLORITE PYRITE CLAY MINERALS SMEC OR PALAG; Leg : 61 Top/Bottom Interval(mm): 0/1440 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 631.44 Core: 28 Top of Core Depth (m) : 630.00 Sect: 1 Top of Section Depth(m): 630.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1B (32-39), 1C (39-54), 6B (139-144); Structure : MASSIVE BASALT SILL WITH VEINS WHICH ARE FILLED WITH CALCITE+CHLORITE+PYRITE+CLAY (SMEC OR PALAG); Texture : MICROPHYRIC, MEDIUM TO SLIGHTLY COARSE-GRAINED DOLERITE; Alteration : SLIGHTLY; Comments : COLOR MEDIUM BLUISH GRAY 5B5/1; Phenocrysts: CLINOPYROXENE MICROPHENOS, PARTLY ALTERED TO CLAYS; PLAGIOCLASE MICROPHENOS, RATIO OF CPX TO PLAG IS ABOUT 1; Replacement: CALCITE CHLORITE PYRITE CLAY MINERALS SMEC OR PALAG; Leg : 61 Top/Bottom Interval(mm): 0/1430 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 632.93 Core: 28 Top of Core Depth (m) : 630.00 Sect: 2 Top of Section Depth(m): 631.50 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS SECTION 28-1; Piece No. : PCE 1A (0-17), 1B (17-36), 1C (36-43), 1D (43-54), 2A (55-66), 2B (66-80), 2C (80-97), 2D (97-105), 2E (106-118), 2F (119-130), 2G (130-141); Structure : MASSIVE BASALT SILL WITH VEINS FILLED WITH CALCITE, CHLORITE+PYRITE+CLAY, IN INTERVALS (72-76) AND (134-138) SPHERULITIC PLAG AGGREGATE (2 TO 3MM IN DIAMETER); Texture : MICROPHYRIC, MEDIUM TO SLIGHTLY COARSE-GRAINED DOLERITE, INTERVALS (72-76) AND (134-138) ARE COARSE-GRAINED, LOWER BOUNDARIES OF INTERVALS ARE GRADUAL (GRANOPHYRE); Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE PLAGIOCLASE Replacement: CALCITE CHLORITE PYRITE CLAY MINERALS Comments : THE UPPER BOUNDARIES OF ZONES (72-76) AND (134-138) ARE SHARP BUT LOWER BOUNDARIES ARE GRADUAL (GRANOPHYRE); Leg : 61 Top/Bottom Interval(mm): 0/ 660 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 633.66 Core: 28 Top of Core Depth (m) : 630.00 Sect: 3 Top of Section Depth(m): 633.00 LITHOLOGY: MASSIVE DOLERITE SILL; SEE SECTION 28-1; Piece No. : PCE 1 (0-11), 2A (15-20), 2B (20-29), 2C (30-40), 2D (40-47), 3A (50-57), 3B (57-66); Structure : MASSIVE BASALT SILL, QUARTZ VEINS IN PCES 2A+2B+3A; Texture : MICROPHYRIC, MEDIUM TO SLIGHTLY COARSE-GRAINED DOLERITE; Alteration : SLIGHTLY ALTERATION OCCURS IN PCES 2A+2B+3A; Phenocrysts: PLAGIOCLASE CLINOPYROXENE Replacement: QUARTZ IN VEINS; Leg : 61 Top/Bottom Interval(mm): 660/1400 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 634.40 Core: 28 Top of Core Depth (m) : 630.00 Sect: 3 Top of Section Depth(m): 633.66 LITHOLOGY: MASSIVE DOLERITE SILL; SEE SECTION 28-1; Piece No. : PCE 3C (66-76), 3D (76-100), 3E (100-110), 3F (110-125), 3G (126-139); Structure : MASSIVE BASALT SILL, CALCITE+CHLORITE+PYRITE+CLAY VEINS; Texture : APHYRIC TO SPARSELY PHYRIC, FINE TO MEDIUM-GRAINED DOLERITE; Alteration : SLIGHTLY ALTERATION IN PCES 3C+3F+3G PROCEEDS ALONG VEINS WITH PYRITE; Phenocrysts: PLAGIOCLASE CLINOPYROXENE Replacement: CALCITE CHLORITE PYRITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 635.95 Core: 28 Top of Core Depth (m) : 630.00 Sect: 4 Top of Section Depth(m): 634.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-16), 1B (17-36), 1C (36-45), 2A (49-60), 2B (60-75), 2C (75-85), 2D (85-102), 2E (102-110), 2F (110-122), 2G (122-125), 2H (125-135), 2I (135-145); Structure : MASSIVE BASALT SILL WITH VEINS, PYRITE IN VEINS; Texture : APHYRIC TO SPARSELY PHYRIC, DOLERITE IS FINE TO MEDIUM-GRAINED; Alteration : MOD ALTERATION IN PCES 1A+2A PROCEEDS ALONG VEIN WITH PYRITE; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS; Replacement: PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 636.50 Core: 28 Top of Core Depth (m) : 630.00 Sect: 5 Top of Section Depth(m): 636.00 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS SECTION 28-1; Piece No. : PCE 1 (0-27), 2 (28-40), 3 (43-49); Structure : MASSIVE BASALT SILL; Texture : APHYRIC TO SPARSELY PHYRIC, FROM 0 TO 27CM AND FROM 33 TO 48CM DOLERITE IS FINE TO MEDIUM-GRAINED, FROM 27 TO 33 DOLERITE IS MEDIUM TO SLIGHTLY COARSE- GRAINED AND HAS PLAG PHENOS AND IS IN PART GLOMEROPHYRIC; Alteration : SLIGHTLY Phenocrysts: PLAGIOCLASE CLINOPYROXENE Leg : 61 Top/Bottom Interval(mm): 0/1250 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 637.25 Core: 29 Top of Core Depth (m) : 636.00 Sect: 1 Top of Section Depth(m): 636.00 LITHOLOGY: MASSIVE DOLERITE SILL; APPEARS TO BE THE SAME AS 28-1; Piece No. : PCE 1A (0-25), 1B (25-80), 1C (80-93), 1D (92-125); Structure : MASSIVE BASALT SILL WITH THIN PYRITE+CLAY+CHLORITE VEINS, FROM 59 TO 61CM VEIN-LIKE SEPARATION BEARING COARSE (4-5MM) QTZ-FELDSPAR (GRANOPHYRIC AGGREGATES), MARGINS OF THIS SEPARATION ARE FINE- GRAINED AND ENRICHED IN DARK MINERALS, IN THE THICKER VEINS, PYRITE IS CUBIC AND PENTAGONAL DODECAHEDRIC AS COMPARED WITH THIN FILMS IN PREVIOUS CORES; Alteration : EXT; Texture : APHYRIC TO SPARSELY PHYRIC, MEDIUM-GRAINED DOLERITE, A COARSE GRAINED SEPARATION (PLAG TO 5MM, ALTERED PYX TO 4MM) AT 59 TO 61CM; Phenocrysts: PLAGIOCLASE LARGEST 5MM AT VEIN-LIKE SEPARATION; CLINOPYROXENE LARGEST 4MM AT VEIN-LIKE SEPARATION; Groundmass : PYROXENE SLIGHTLY ALTERED TO PALE GRAYISH-GREEN CLAY; Replacement: CLAY Minerals Replaced: PYX PALE GRAYISH -GREEN CLAY; Leg : 61 Top/Bottom Interval(mm): 0/1250 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 638.75 Core: 29 Top of Core Depth (m) : 636.00 Sect: 2 Top of Section Depth(m): 637.50 LITHOLOGY: MASSIVE BASALT (DOLERITE); Piece No. : PCE 1A (0-6), 1B (6-30), 1C (30-64), 1D (51-70), 1E (66-75), 1F (72-100), 1G (100-120); Structure : MASSIVE BASALT SILL WITH VEINS, TWO SYSTEMS OF FRACTURES ARE DISTINCTLY DEVELOPED: 30 DEGREE AND 60 DEGREE INCLINATIONS RELATIVE TO A VERTICAL AXIS; Texture : MEDIUM-GRAINED DOLERITES, DOLERITE OF SECTION 2 IS SLIGHTLY MORE COARSE-GRAINED AND ENRICHED IN DARK CLAY SPOTS AS COMPARED WITH 29-1; Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 640.45 Core: 29 Top of Core Depth (m) : 636.00 Sect: 3 Top of Section Depth(m): 639.00 LITHOLOGY: MASSIVE BASALT; Piece No. : PCE 1A (0-30), 1B (30-52), 1C (53-77), 1D (77-116), 1E (116-145); Structure : MASSIVE BASALT WITH VEINS, TWO SYSTEMS OF FRACTURES ARE DISTINCTLY DEVELOPED: 30 DEGREE AND 60 DEGREE INCLINATIONS RELATIVE TO VERTICAL AXIS; Texture : APHYRIC, MEDIUM-GRAINED DOLERITES; Alteration : EXT; Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 641.90 Core: 29 Top of Core Depth (m) : 636.00 Sect: 4 Top of Section Depth(m): 640.50 LITHOLOGY: MASSIVE BASALT (DOLERITE); SAME DOLERITE AS SECTION 29-4; Piece No. : PCE 1A (0-62), 1B (63-82), 1C (82-145); Structure : MASSIVE BASALT WITH VEINS; Texture : MEDIUM-GRAINED DOLERITE, FROM 80 TO 140CM DOLERITE IS SLIGHTLY FINER GRAINED, AND DOES NOT HAVE DARK COARSE SPOTS; Leg : 61 Top/Bottom Interval(mm): 0/ 970 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 642.97 Core: 29 Top of Core Depth (m) : 636.00 Sect: 5 Top of Section Depth(m): 642.00 LITHOLOGY: MASSIVE BASALT (DOLERITE); Piece No. : PCE 1A (0-10), 1B (12-35), 1C (35-94); Structure : MASSIVE BASALT WITH VEINS, THICK VEIN (7-9CM) INCLUDES A LATER OCCURRENCE OF CALCITE IN ADDITION TO PYRITE+CLAY+CHLORITE NORMALLY FORMING THE VEINS; Texture : MEDIUM-GRAINED (AS IN 80-140CM OF 29-4); Alteration : ALTERED ABOUT VEINS; Replacement: CALCITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1020 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 644.52 Core: 29 Top of Core Depth (m) : 636.00 Sect: 6 Top of Section Depth(m): 643.50 LITHOLOGY: MASSIVE BASALT (DOLERITE); SAME DOLERITE AS SECTION 29-5; Piece No. : PCE 1A (0-100); Structure : MASSIVE BASALT WITH VEINS, VEINS ARE TYPICALLY COMPOSED OF A COMBINATION OF PYRITE+CLAY+CHLORITE AND THICKER VEINS ALSO INCLUDE CALCITE; Texture : MEDIUM-GRAINED (AS IN 29-5); Alteration : ALTERED ABOUT VEINS; Replacement: CALCITE IN LARGER VEINS; PYRITE CHLORITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 646.49 Core: 30 Top of Core Depth (m) : 645.00 Sect: 1 Top of Section Depth(m): 645.00 LITHOLOGY: CPX MOD PHYRIC DOLERITE; MASSIVE BASALT SILL; Piece No. : PCE 1 (0-4), 2 (5-62), 3 (64-71), 4 (74-77), 5 (80-149); Structure : MASSIVE BASALT SILL, FROM 80 TO 90CM DOLERITE HAS A QTZ OR CHALC OR ZEOLITE VEIN WHICH IS WHITE WITH CLAY MARGINS, IN ADDITION, THIN (<0.1MM) CLAY VEINS OCCURS AT INCLINATIONS OF 15 TO 20 DEGREES FROM HORIZONTAL; Texture : MOD PHYRIC, UNIFORMLY MEDIUM-GRAINED (AS IN SECTION 29-1); Alteration : FRESH NO APPARENT ALTERATION OF THE GNDMASS; Phenocrysts: CLINOPYROXENE ( 4%) Size(mm): <0.5 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS HOMOGENEOUS MATRIX, NO APPARENT ALTERATION; Replacement: QTZ OR CHALC OR ZEOL IN VEIN; CLAY MINERALS IN VEINS; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 647.98 Core: 30 Top of Core Depth (m) : 645.00 Sect: 2 Top of Section Depth(m): 646.50 LITHOLOGY: DOLERITE; MASSIVE BASALT SILL; SAME SILL AS IN SECTION 30-1; Piece No. : PCE 1 (0-148); Structure : MASSIVE BASALT SILL,THERE ARE THREE VEIN TYPES: 1) CALCITE (0 TO 5CM), 2) WHITE QTZ OR CHALC OR ZEOL WHICH HAS CLAY MARGINS, AND 3) THIN (<0.1MM) CLAY; Texture : UNIFORMLY MED-GRAINED DOLERITE; Alteration : FRESH NO APPARENT ALTERATION OF THE GNDMASS; Phenocrysts: CLINOPYROXENE ( 4%) Size(mm): <0.5 Replacement: QTZ OR CHALC OR ZEOL IN VEIN; CLAY MINERALS IN VEINS; Comments : INDISTINGUISHABLE IN ANY FEATURES FROM PREVIOUS SECTION; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 649.48 Core: 30 Top of Core Depth (m) : 645.00 Sect: 3 Top of Section Depth(m): 648.00 LITHOLOGY: MASSIVE DOLERITE; BASALT SILL; SAME SILL AS IN SECTIONS 30-1 AND 30-2; Piece No. : PCE 1 (0-148); Structure : MASSIVE BASALT SILL, THERE ARE THREE VEIN TYPES: 1) CALCITE, 2) WHITE QTZ OR CHALC OR ZEOL WHICH HAS CLAY MARGINS, AND 3) THIN ABUNDANT CLAY VEINS (<0.1MM) REGULARLY SPACED AT 2 TO 3CM INTERVALS AND THEY DIP 15 TO 25 DEGREES RELATIVE TO HORIZONTAL; Texture : UNIFORMLY MEDIUM-GRAINED DOLERITE; Alteration : FRESH NO APPARENT ALTERATION OF THE GNDMASS; Phenocrysts: CLINOPYROXENE ( 4%) Size(mm): <0.5 Replacement: QTZ OR CHALC OR ZEOL IN VEIN; CLAY MINERALS IN VEINS; Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS HOMOGENEOUS MATRIX, NO APPARENT ALTERATION; Leg : 61 Top/Bottom Interval(mm): 0/1320 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 650.82 Core: 30 Top of Core Depth (m) : 645.00 Sect: 4 Top of Section Depth(m): 649.50 LITHOLOGY: MASSIVE DOLERITE; BASALT SILL; SAME SILL AS IN SECTIONS 30-1 TO 30-4; Piece No. : PCE 1 (0-132); Structure : MASSIVE BASALT SILL WITH VEINS, THERE ARE THREE VEIN TYPES: 1) CALCITE, 2) WHITE QTZ OR CHALCEDONY OR ZEOLITE VEINS WITH CLAYEY MARGINS, AND 3) THIN (<0.1MM) ABUNDANT CLAY VEINS REGULARLY SPACED AT 2 TO 3CM INTERVALS AND THEY DIP 15 TO 25 DEGREES RELATIVE TO HORIZONTAL; Texture : UNIFORMLY MEDIUM-GRAINED DOLERITE; Alteration : FRESH NO APPARENT ALTERATION OF GNDMASS; Phenocrysts: CLINOPYROXENE Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS HOMOGENEOUS MATRIX; Replacement: CALCITE WHITE QTZ OR CHALCEDONY OR ZEOLITE IN VEIN; CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 652.40 Core: 30 Top of Core Depth (m) : 645.00 Sect: 5 Top of Section Depth(m): 651.00 LITHOLOGY: MASSIVE DOLERITE; BASALT SILL; SAME SILL AS IN SECTIONS 30-1 TO 30-4; Piece No. : PCE 1 (0-70), 2 (72-140); Structure : MASSIVE BASALT SILL WITH VEINS, THERE ARE THREE VEIN TYPES: 1) CALCITE, 2) WHITE QTZ OR CHALCEDONY OR ZEOLITE WHICH HAVE CLAYEY MARGINS, AND 3) THIN (<2MM, SLIGHTLY THICKER THAN SECTION 30-4) ABUNDANT CLAY VEINS REGULARLY SPACED AT 2 TO 3CM INTERVALS AND THEY DIP 15 TO 25 DEGREES FROM THE HORIZONTAL; Texture : MEDIUM-GRAINED DOLERITE; Alteration : FRESH NO APPARENT ALTERATION OF GNDMASS; Phenocrysts: CLINOPYROXENE ( 4%) Size(mm): <0.5 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS HOMOGENEOUS MATRIX; Replacement: CALCITE WHITE QTZ OR CHALCEDONY OR ZEOLITE IN VEIN; CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1410 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 653.91 Core: 30 Top of Core Depth (m) : 645.00 Sect: 6 Top of Section Depth(m): 652.50 LITHOLOGY: MASSIVE DOLERITE; BASALT SILL; SAME SILL AS IN SECTIONS 30-1 TO 30-5; Piece No. : PCE 1 (0-120), 2 (121-140); Structure : MASSIVE BASALT SILL WITH VEINS, THERE ARE THREE VEIN TYPES: 1) CALCITE, 2) WHITE QTZ OR CHALCEDONY OR ZEOLITE WHICH HAVE CLAYEY MARGINS, AND 3) THIN (<2MM, SLIGHTLY THICKER THAN SECTION 30-5) ABUNDANT CLAY VEINS REGULARLY SPACED AT 2 TO 3CM INTERVALS AND THEY DIP 15 TO 25 DEGREES FROM THE HORIZONTAL; Texture : MEDIUM-GRAINED DOLERITE; Alteration : FRESH NO APPARENT ALTERATION OF GNDMASS; Phenocrysts: CLINOPYROXENE ( 4%) Size(mm): <0.5 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS HOMOGENEOUS MATRIX; Replacement: CALCITE WHITE QTZ OR CHALCEDONY OR ZEOLITE, IN VEIN; CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1050 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 655.05 Core: 31 Top of Core Depth (m) : 654.00 Sect: 1 Top of Section Depth(m): 654.00 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1A (0-38), 2A (41-51), 2B (52-60), 3 (65-76), 4A (79-91), 4B (92-95), 5 (97-103); Structure : MASSIVE BASALT SILL WITH CHLORITE VEINS; Texture : APHANITIC, SLIGHTLY PHYRIC, FINE TO MEDIUM-GRAINED DOLERITE; Alteration : SLIGHTLY; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS; Groundmass : PLAGIOCLASE MICROLITES; CLINOPYROXENE MICROLITES; MAGNETITE MICROLITES; Replacement: CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/ 500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 656.00 Core: 32 Top of Core Depth (m) : 655.50 Sect: 1 Top of Section Depth(m): 655.50 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1 (0-8), 2A (10-22), 2B (24-37), 3 (41-49); Structure : MASSIVE WITH CLAY VEINS; Texture : APHYRIC TO MICROPHYRIC, INTERVAL (30-50) IS MICROPHYRIC, INTERVAL (0-30) IS FINE-GRAINED; Alteration : MOD; Comments : AT 50CM LOWER CONTACT OF THE SILL WITH SEDIMENT, MAY BE CHILLED?; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS, THE RATIO OF PLAG TO CPX=1; Replacement: CLAY MINERALS IN VEINS; Leg : 61 Top/Bottom Interval(mm): 0/ 500 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 685.50 Core: 36 Top of Core Depth (m) : 685.00 Sect: CC Top of Section Depth(m): 685.10 LITHOLOGY: PLAG-CPX MOD PHYRIC BASALT; BASALT SILL (DOLERITE); Piece No. : PCE 1 (2-5), 2 (11-15), 3 (20-26), 4 (32-35); Structure : BASALT SILL, PCES WITH TEXTURES WHICH RANGE FROM VERY FINE-GRAINED OR GLASSY (VARIOLITIC?) TO HOLOCRYSTALLINE MICRODOLERITIC REPRESENT MARGINAL AND INNER CRYSTALLINE FACIES OF A BASALTIC SILL- RESPECTIVELY, CLAY VEINS PRESENT; Texture : MOD PHYRIC, TEXTURES RANGE FROM VERY FINE-GRAINED OR GLASSY (VARIOLITIC?) TO HOLOCRYSTALLINE MICRODOLERITIC; Alteration : ALTERATION IS NOT VISIBLE WITH THE UNAIDED EYE EXCEPT FOR ONE CLAY VEIN, BUT THESE ROCKS ARE "GREEN STONES" SUGGESTING SIGNIFICANT GNDMASS ALTERATION; Comments : THERE ARE NO ORIENTED PCES AND ALL PCES EXCEPT PCE 5 ARE OUT OF STRATIGRAPHIC ORDER; Phenocrysts: PLAGIOCLASE ( <<1%) Size(mm): <0.2 CLINOPYROXENE ( 2%) Size(mm): 0.03 Replacement: CLAY MINERALS IN VEINS; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 692.48 Core: 38 Top of Core Depth (m) : 691.00 Sect: 1 Top of Section Depth(m): 691.00 LITHOLOGY: APHYRIC BASALT; MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1 (1-2), 2 (5-15), 3 (17-22), 4 (27-33), 5 (35-40), 6 (42-148); Structure : MASSIVE BASALT SILL, MASSIVE GNDMASS OF PLAG; Texture : APHYRIC WITH A FEW CPX PHENOS (<1%, 0.5MM), FROM 0 TO 30CM GRAIN SIZE INCREASES DOWNWARD, FROM 30 TO 150CM THE GRAIN SIZE IS RELATIVELY CONSTANT; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): 0.5 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS CLAY MINERALS ROCK HAS A FEW CLAY SPOTS; Leg : 61 Top/Bottom Interval(mm): 0/1000 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 693.50 Core: 38 Top of Core Depth (m) : 691.00 Sect: 2 Top of Section Depth(m): 692.50 LITHOLOGY: APHYRIC BASALT; MASSIVE BASALT; Piece No. : PCE 1 (0-45), 2 (47-89), 3 (94-99); Structure : MASSIVE BASALT, AT 80-90CM VEINS ARE OF PYRITE+ CALCITE; Texture : APHYRIC, INTERVAL (0-44) HAS A FEW PLAG AND CPX PHENOS (<<1%, 0.2-0.3MM), IN THE UPPER PORTION (AROUND 60CM) A FEW PHENOS OF CPX AND PLAG (<<1%, 0.2 TO 0.5MM), IN THE UPPER PORTION PLAG ABUNDANCE IS APPROXIMATELY EQUAL TO CPX, DOWNWARD GLOMEROPHYRIC CLUSTERS BECOME COMMON AND CPX>PLAG IN ABUNDANCE, INTERVAL (0-45) THE BASALT GRAIN-SIZE DECREASES DOWNWARD TO A GLASSY MARGIN AT 44-45CM, FINE-GRAINED MATRIX, CLAY SPOTS OF ALTERATION ARE PRESENT FROM THE GLASSY MARGIN (44CM) UPWARD, GLASSY MARGIN AT 47-48CM, BELOW 48CM GRAIN SIZE GRADUALLY INCREASES; Alteration : CLAY ALTERATION SPOTS ARE PRESENT FROM 44CM UPWARD; Phenocrysts: CLINOPYROXENE ( <<1%) Size(mm): 0.2-0.4 INTERVAL (0-45); COMBINATION ( <<1%) Size(mm): 0.2-0.5 INCLUDING PLAG+CPX, INTERVAL (48-100); Replacement: CLAY CALCITE IN VEINS; PYRITE IN VEINS; Leg : 61 Top/Bottom Interval(mm): 1000/1300 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 693.80 Core: 38 Top of Core Depth (m) : 691.00 Sect: 2 Top of Section Depth(m): 693.50 LITHOLOGY: CPX MOD PHYRIC BASALT; Piece No. : PCE 4 (101-109), 5 (112-127); Structure : MASSIVE BASALT, AT 110 TO 125CM VEINS ARE PYRITE+ CLAY; Texture : MOD PHYRIC, MEDIUM TO FINE-GRAINED SIZE; Phenocrysts: CLINOPYROXENE ( 2-4%) Leg : 61 Top/Bottom Interval(mm): 0/1470 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 693.47 Core: 39 Top of Core Depth (m) : 692.00 Sect: 1 Top of Section Depth(m): 692.00 LITHOLOGY: CPX-PLAG MICROPHYRIC BASALT; MASSIVE BASALT; Piece No. : PCE 1 (0-6), 2A (7-22), 2B (22-33), 3 (36-48), 5 (56-65), 6 (70-75), 7 (78-90), 8 (92-100), 9 (100-110), 10A (112-125), 10B (125-131), 10C (135-147); Structure : MASSIVE BASALT; VEINS ARE FILLED WITH CHLORITE AND PYRITE AND CLAY.MINS(SMEC OR PALAG); Texture : MICROPHYRIC, HYALOPILITIC TO INTERSERTAL, INTERVAL (0-47) IS FINE TO SLIGHTLY COARSE-GRAINED, INTERVAL (55-147) IS FINE TO SLIGHTLY MEDIUM-GRAINED, GRAIN SIZE INCREASES DOWNWARD; Alteration : SLIGHTLY TO FRESH; Comments : COLOR OF FINE-GRAINED BASALT-MEDIUM LIGHT GRAY (N4), COLOR OF SLIGHTLY MEDIUM-GRAINED BASALT-MEDIUM GRAY (N5); Phenocrysts: CLINOPYROXENE ABUNDANCE OF CPX MICROPHENOS IS GREATER THAN PLAG MICROPHENOS; PLAGIOCLASE PLAG MICROPHENOS; Groundmass : PLAGIOCLASE MICROLITES; CLINOPYROXENE MICROLITES; MAGNETITE MICROLITES; GLASS Replacement: CHLORITE PYRITE CLAY MINERALS SMEC OR PALAG; Leg : 61 Top/Bottom Interval(mm): 0/1470 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 693.47 Core: 39 Top of Core Depth (m) : 692.00 Sect: 1 Top of Section Depth(m): 692.00 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 4 (50-55); Structure : MASSIVE BASALT, VEINS OF PYRITE+CHORITE+CLAY.MINS (SMEC,PALAG); Texture : APHYRIC, UPPER PART IS A CHILLED GLASSY MARGIN, MICROPHENOS OF CPX>PLAG, GLASS; Alteration : FRESH TO SLIGHTLY; Comments : GLASSY MARGIN IS GRAYISH BLACK (N2); Phenocrysts: CLINOPYROXENE MICROPHENOS; PLAGIOCLASE MICROPHENOS; Groundmass : MICROLITES IN GNDMASS; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 694.98 Core: 39 Top of Core Depth (m) : 692.00 Sect: 2 Top of Section Depth(m): 693.50 LITHOLOGY: MASSIVE BASALT; Piece No. : PCE 1 (0-15), 2A (18-30), 2B (30-40), 2C (40-60), 3 (65-78), 4 (81-90), 5A (96-111), 5B (111-121), 6A (125-137), 6B (137-148); Structure : MASSIVE BASALT, VEINS OF CHLORITE+PYRITE+CLAY (SMEC>PALAG); Texture : FROM 0 TO 50(?)CM BASALT IS SLIGHTLY MEDIUM TO MEDIUM-GRAINED, GRAIN SIZE INCREASES DOWNWARD, FROM 50 TO 150CM BASALT IS MEDIUM-GRAINED; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 39-1; Leg : 61 Top/Bottom Interval(mm): 0/1460 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 696.46 Core: 39 Top of Core Depth (m) : 692.00 Sect: 3 Top of Section Depth(m): 695.00 LITHOLOGY: MASSIVE BASALT; Piece No. : PCE 1 (1-8), 2A (10-31), 2B (32-49), 2C (50-60), 3A (67-84), 3B (84-98), 3C (98-115), 3D (115-130), 3E (130-139), 3F (139-146); Structure : MASSIVE BASALT, VEINS OF CHLORITE+PYRITE+CLAY (SMEC>PALAG); Texture : FROM 0 TO 115CM BASALT IS MEDIUM-GRAINED, FROM 115 TO 137CM BASALT IS FINE TO SLIGHTLY FINE-GRAINED, GRAIN SIZE GRADUALLY DECREASES DOWNWARD, PCE 3F HAS A CHILLED MARGIN AT 144-145CM; Comments : SAME UNIT AS SECTION 39-2; Replacement: CHLORITE PYRITE SMECTITE PALAGONITE Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 697.95 Core: 39 Top of Core Depth (m) : 692.00 Sect: 4 Top of Section Depth(m): 696.50 LITHOLOGY: MASSIVE BASALT; Piece No. : PCE 1 (0-10), 2 (10-20), 3 (22-30), 4 (32-41), 5 (42-51), 6 (54-62), 7 (65-74), 8 (75-84), 9A (85-101), 9B (101-110), 10 (112-120), 11 (121-130), 12 (134-145); Structure : MASSIVE BASALT, VEINS OF CHLORITE+PYRITE+CLAY.MINS (SMEC>PALAG); Texture : FROM 0 TO 9CM IS A GLASSY CHILLED BASALT MARGIN, FROM 9 TO 64CM BASALT HAS MINOR DOWNWARD CHANGES OF GRAIN SIZE-FROM FINE TO SLIGHTLY MEDIUM- GRAINED, FROM 64 TO 66CM (UPPER PART OF PCE 7) IS A GLASSY CHILLED BASALT MARGIN, FROM 66 TO 93(?)CM (PCE 7, LOWER PART, TO UPPER PART OF PCE 9A) BASALT INCREASES FROM FINE TO SLIGHTLY MEDIUM-GRAINED, FROM 93 TO 120CM (PCES 9A, LOWER PART, TO 10) BASALT DECREASES FROM SLIGHTLY MEDIUM TO FINE-GRAINED, FROM 120 TO 150CM (PCES 11+12) UNIT C IS WITHOUT A CHILLED MARGIN, GRAIN SIZE INCREASES DOWNWARD FROM FINE TO SLIGHTLY MEDIUM-GRAINED; Alteration : SLIGHTLY; Comments : THREE UNITS ARE OBSERVED: UNIT A (0-64), UNIT B (64-120), UNIT C (120-150); Replacement: CHLORITE PYRITE SMECTITE PALAGONITE Leg : 61 Top/Bottom Interval(mm): 0/1200 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 699.20 Core: 39 Top of Core Depth (m) : 692.00 Sect: 5 Top of Section Depth(m): 698.00 LITHOLOGY: MASSIVE BASALT; Piece No. : PCE 1 (1-8), 2 (10-20), 3A (22-35), 3B (35-42), 3C (42-53), 4 (55-65), 5 (65-72), 6 (75-83), 7 (85-95), 8 (98-120); Structure : MASSIVE, VEINS OF CHLORITE+PYRITE+CLAY.MINS (SMEC, PALAG); Texture : FROM 0 TO 43CM (PCES 1-3B) BASALT INCREASES IN GRAIN SIZE FROM SLIGHTLY MEDIUM TO MEDIUM, FROM 43 TO 75CM (PCES 3C-5) BASALT GRAIN SIZE DECREASES FROM MEDIUM TO FINE, FROM 75 TO 95CM (PCES 6+7) BASALT IS FINE TO SLIGHTLY MEDIUM-GRAINED, FROM 95 TO 120CM (PCES 7+8) BASALT GRAIN SIZE DECREASES DOWNWARD FROM SLIGHTLY MEDIUM TO FINE; Alteration : SLIGHTLY; Comments : THIS UNIT CONTINUED FROM SECTION 39-4, UNIT A (?) Piece No. : OCCURS FROM (0-75) AND UNIT B (?) OCCURS FROM (75-120); Replacement: CHLORITE PYRITE SMECTITE PALAGONITE Leg : 61 Top/Bottom Interval(mm): 0/ 540 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 702.54 Core: 40 Top of Core Depth (m) : 702.00 Sect: 1 Top of Section Depth(m): 702.00 LITHOLOGY: MASSIVE BASALT; SAME MINERALOGY AS SECTION 39-1; Piece No. : PCES 1 (0-4), 2 (6-9), 3A (13-23), 3B (25-30), 4A (31-45), 4B (45-50), 4C (50-53); Structure : MASSIVE BASALT; Texture : INTERVAL (0-19) BASALT VARIES FROM FINE TO SLIGHTLY MEDIUM-GRAINED, INTERVAL (19-30) (PCES 3A+3B) BASALT IS MEDIUM-GRAINED, INTERVAL (30-54) (PCES 4A-4C) BASALT VARIES FROM MEDIUM- GRAINED TO A CHILLED MARGIN (BOTTOM 2CM OF PCE 4C); Alteration : SLIGHTLY; Comments : TWO UNITS OCCUR IN THIS SECTION, UNIT A IS 0 TO 54CM; Leg : 61 Top/Bottom Interval(mm): 540/ 860 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 702.86 Core: 40 Top of Core Depth (m) : 702.00 Sect: 1 Top of Section Depth(m): 702.54 LITHOLOGY: MASSIVE BASALT; SAME LITHOLOGY AS SECTION 39-1; Piece No. : PCES 5 (55-86); Structure : MASSIVE BASALT; Texture : INTERVAL (55-64) BASALT HAS A CHILLED MARGIN (55-57) AND GRAIN SIZE INCREASES DOWNWARD TO SLIGHTL MEDIUM, INTERVAL (64-71) BASALT IS SLIGHTLY MEDIUM- GRAINED, INTERVAL (71-86) BASALT VARIES DOWNWARD FROM SLIGHTLY MEDIUM-GRAINED TO A CHILLED MARGIN (84-86); Alteration : SLIGHTLY; Comments : TWO UNITS OCCUR IN THIS SECTION, UNIT B IS 54 TO 86CM; Leg : 61 Top/Bottom Interval(mm): 860/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 703.50 Core: 40 Top of Core Depth (m) : 702.00 Sect: 1 Top of Section Depth(m): 702.86 LITHOLOGY: SEDIMENT; Leg : 61 Top/Bottom Interval(mm): 0/ 220 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 703.72 Core: 40 Top of Core Depth (m) : 702.00 Sect: 2 Top of Section Depth(m): 703.50 LITHOLOGY: VOLCANICLASTICS; Leg : 61 Top/Bottom Interval(mm): 220/ 550 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 704.05 Core: 40 Top of Core Depth (m) : 702.00 Sect: 2 Top of Section Depth(m): 703.72 LITHOLOGY: MASSIVE BASALT; SAME BASALT AS MENTIONED IN SECTION 40-1; Piece No. : PCES 1A (24-34), 1B (34-54); Structure : MASSIVE BASALT; Texture : CHILLED MARGIN AT 24-26CM, GRAIN SIZE INCREASES DOWNWARD AND BECOMES MEDIUM-GRAINED AT 55CM; Alteration : SLIGHTLY Comments : FROM 24 TO 55CM IS A SINGLE BASALT UNIT; Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 712.40 Core: 41 Top of Core Depth (m) : 711.00 Sect: 1 Top of Section Depth(m): 711.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : 5A (40-58), 5B (55-107), 5C (107-137); Structure : MASSIVE BASALT SILL, VEINS ARE FILLED WITH CALCITE+ CHLORITE+PYRITE+SMEC; Texture : MICROPHYRIC, DOLERITE WITH EQUAL AMOUNTS OF PLAG AND CPX, MICROPHENO GRAIN SIZE VARIES MEDIUM TO SLIGHTLY COARSE-GRADUALLY INCREASING DOWNWARD, DOLERITE IS INTERGRANULAR TO SUBOPHITIC; Alteration : SLIGHTLY; Comments : BASALT IS MEDIUM GRAY (N5); Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS, THE RATIO PLAG:CPX IS APPROXIMATELY 1; Groundmass : PLAGIOCLASE CLINOPYROXENE TITANOMAGNETITE MICROLITES; Leg : 61 Top/Bottom Interval(mm): 0/1280 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 713.78 Core: 41 Top of Core Depth (m) : 711.00 Sect: 2 Top of Section Depth(m): 712.50 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS SECTION 41-1; Piece No. : PCE 1A (1-43), 1B (45-80), 1C (80-128); Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CALCITE+CHLORITE+PYRITE+SMEC BUT CHLORITE+PYRITE VEINS ARE PREVAILING, HOMOGENEOUS; Texture : SLIGHTLY COARSE-GRAINED, SUBOPHITIC; Alteration : SLIGHTLY; Comments : BASALT IS MEDIUM GRAY (N5); Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS, THE RATIO PLAG:CPX IS APPROXIMATELY 1; Groundmass : PLAGIOCLASE CLINOPYROXENE TITANOMAGNETITE MICROLITES; Replacement: CALCITE CHLORITE PYRITE SMECTITE Leg : 61 Top/Bottom Interval(mm): 0/1340 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 715.34 Core: 41 Top of Core Depth (m) : 711.00 Sect: 3 Top of Section Depth(m): 714.00 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS SECTION 41-1; Piece No. : PCE 1A (1-60), 1B (60-83), 1C (83-115), 1D (115-132); Structure : MASSIVE DOLERITE SILL, HOMOGENEOUS, VEINS ARE FILLED WITH CALCITE+CHLORITE+PYRITE+SMEC, CHLORITE+PYRITE VEINS ARE PREVALENT; Texture : SLIGHTLY COARSE-GRAINED, SUBOPHITIC; Alteration : SLIGHTLY; Comments : BASALT IS MEDIUM GRAY (N5), DOLERITE IS THE SAME UNIT AS SECTION 41-1; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS; Replacement: CALCITE CHLORITE PYRITE SMECTITE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 717.00 Core: 41 Top of Core Depth (m) : 711.00 Sect: 4 Top of Section Depth(m): 715.50 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS SECTION 41-1; Piece No. : PCE 1A (1-60), 1B (59-128), 1C (129-150); Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CALCITE+CHLORITE+PYRITE+SMEC, CHLORITE+PYRITE ARE PREVALENT; Texture : MICROPHYRIC, DOLERITE IS SPOTTED BY ALTERATION TO CLAY, SUBOPHITIC TO INTERGRANULAR, GRAIN SIZE DECREASES DOWNWARD FROM SLIGHTLY COARSE TO MEDIUM, MICROPHENOS OF PLAG ARE LESS COMMON IN THE UPPER PART OF THE SECTION THAN IN THE LOWER PART; Alteration : MED ALTERATION TO CLAY SPOTS DOLERITE; Comments : SAME UNIT AS 41-1; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS; Replacement: CALCITE CHLORITE PYRITE SMECTITE Leg : 61 Top/Bottom Interval(mm): 0/ 900 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 717.90 Core: 41 Top of Core Depth (m) : 711.00 Sect: 5 Top of Section Depth(m): 717.00 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS SECTION 41-1; Piece No. : PCE 1A (1-22), 1B (22-42), 1C (42-50), 1D (50-61), 1E (61-93); Structure : MASSIVE DOLERITE SILL, HOMOGENEOUS; Texture : MEDIUM-GRAINED DOLERITE, INTERGRANULAR TO INTERSERTAL; Alteration : SLIGHTLY; Comments : BASALT IS MEDIUM GRAY (N5); Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS; Replacement: CALCITE CHLORITE PYRITE SMECTITE Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 719.90 Core: 41 Top of Core Depth (m) : 711.00 Sect: 6 Top of Section Depth(m): 718.50 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS SECTION 41-1; Piece No. : PCE 1A (2-35), 1B (35-121), 1C (122-140); Structure : MASSIVE DOLERITE SILL, WITH VEINS, VEINS ARE FILLED WITH CALCITE+CHLORITE+PYRITE+SMEC; Texture : INTERVAL (0-121) BASALT GRAIN SIZE DECREASES DOWNWARD FROM SLIGHTLY COARSE TO MEDIUM, SUBOPHITIC TO INTERGRANULAR; Alteration : MOD TO SLIGHTLY PCES 1A+1B; EXT FROM 120 TO 140CM (PCE 1C) BASALT HAS A BADLY ALTERED SURFACE AND THUS THE BASALT'S GRAIN SIZE IS NOT APPARENT; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS; Replacement: CALCITE CHLORITE PYRITE SMECTITE Leg : 61 Top/Bottom Interval(mm): 0/1080 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 721.08 Core: 41 Top of Core Depth (m) : 711.00 Sect: 7 Top of Section Depth(m): 720.00 LITHOLOGY: APHYRIC TO CPX SLIGHTLY PHYRIC BASALT; MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1A (1-19), 1B (16-31), 1C (31-40), 1D (41-56), 1E (56-86), 1F (90-100); Structure : MASSIVE BASALT SILL WITH VEINS FILLED WITH CALCITE+ CHLORITE+PYRITE+SMEC, CHLORITE+PYRITE VEINS PREVAIL; Texture : APHYRIC TO SLIGHTLY MICROPHYRIC, INTERVAL (0-105) DOLERITE IS MEDIUM TO COARSE-GRAINED (DECREASING DOWNWARD), ALTERATION SPOTS; Alteration : SLIGHTLY FEW SPOTS OF ALTERATION TO CLAY; Comments : CONTACT OF BASALT AND SEDIMENT AT 105CM, BASALT IS MEDIUM GRAY (N5); Phenocrysts: CLINOPYROXENE MICROPHENOS; Replacement: CALCITE CHLORITE PYRITE SMECTITE Leg : 61 Top/Bottom Interval(mm): 1080/1500 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 721.50 Core: 41 Top of Core Depth (m) : 711.00 Sect: 7 Top of Section Depth(m): 721.08 LITHOLOGY: SEDIMENT; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 730.48 Core: 44 Top of Core Depth (m) : 729.00 Sect: 1 Top of Section Depth(m): 729.00 LITHOLOGY: CPX MOD PHYRIC BASALT; Piece No. : PCE 1 (9-20), 2 (25-34), 3 (36-65), 4 (66-81), 5 (85-95), 6 (100-105), 7 (109-120), 8 (124-148); Structure : THESE THREE BASALT UNITS MAY BE SILLS WITH CRENULATED MARGINS OR PILLOWS; Texture : MOD PHYRIC, POSSIBLE CRENULATED MARGINS, UNIT 1 (9-34) IS GLASSY (9-10) AND FINE-GRAINED (10-34), UNIT 2 (35-65) IS GLASSY (33-34) AND (63-64) AND FINE-GRAINED (34-63), UNIT 3 (66-148) IS GLASSY (66-68) AND (146-148) AND FINE-GRAINED (68-146), VARIABLY GLASSY AND HOLOXTLN MATRIX; Comments : THREE BASALT UNITS, UNIT 1 (9-34)+UNIT 2 (35-65)+ UNIT 3 (66-148); Alteration : CLAYEY ALTERED SPOTS; Vesicles : Location: Filling: CHALC,QTZ Shape : SPHERULE NEAR THE GLASSY MARGINS ARE DRUSY AND VUGGY CHALC-QTZ IN SMALL SPHERULES; Phenocrysts: CLINOPYROXENE ( 3-4%) Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS Replacement: CHALCEDONY QUARTZ CHLORITE Minerals Replaced: GLASS CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 731.95 Core: 44 Top of Core Depth (m) : 729.00 Sect: 2 Top of Section Depth(m): 730.50 LITHOLOGY: CPX MOD PHYRIC BASALT; SAME AS SECTION 1; Piece No. : PCE 1 (2-9), 2 (13-18), 3 (22-30), 4 (32-36), 5 (41-50), 6 (54-80), 7 (81-98), 8 (103-110), 9 (114-122), 10 (126-131), 11 (135-145); Structure : THESE BASALT UNITS MAY BE SILLS WITH CRENULATED MARGINS OR PILLOWS; Texture : MOD PHYRIC, POSSIBLE CRENULATED MARGINS, UNIT 4 (0-80) IS GLASSY (0-37) AND FINE-GRAINED (37-80), UNIT 5 (80-150(?)) IS GLASSY (81-83) AND 2CM OF ONE OF THE PCES NEAR THE BOTTOM OF THE SECTION AND FINE-GRAINED (83-135(?)) AND FRAGMENTS TO 150CM; Comments : TWO UNITS PRESENT-INTERVALS (0-80) AND (80-150); Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 733.40 Core: 44 Top of Core Depth (m) : 729.00 Sect: 3 Top of Section Depth(m): 732.00 LITHOLOGY: PLAG-PYX PHYRIC BASALT; SAME AS SECTIONS 1+2; Piece No. : PCE 1 (0-10), 2 (13-16), 3 (20-23), 4 (25-35), 5 (40-45), 6 (50-61), 7 (73-75), 8 (80-140); Structure : THE BASALT (UNIT 6) MAY BE A SILL WITH CRENULATED MARGINS OR PILLOWS; Texture : PHYRIC, POSSIBLE CRENULATED MARGINS, PCES OF GLASSY BASALT OCCURS IN INTERVAL (0-14), FINE-GRAINED IN INTERVAL (14-76); Comments : BELOW 76CM ALL PCES (PCE 8) ARE CORE CATCHER SAMPLES WHOSE ORIENTATION AND STRATIGRAPHIC POSITION ARE UNKNOWN; Phenocrysts: CLINOPYROXENE PLAGIOCLASE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 734.50 Core: 45 Top of Core Depth (m) : 733.00 Sect: 1 Top of Section Depth(m): 733.00 LITHOLOGY: PLAG-PYX SLIGHTLY PHYRIC BASALT; Piece No. : PCES 1A (0-18), 1B (16-30), 1C (30-40), 3C (90-103), 3D (104-120), 4 (122-140), 5 (141-148); Structure : BASALT SILL CUT BY CALCITE+CHLORITE+CLAY+PYRITE VEINS; Texture : SLIGHTLY PHYRIC, FINE-GRAINED, BASALT WITH DISSEMINATED VARIOLITIC (GLASSY) SPOTS; Alteration : EXT; Phenocrysts: CLINOPYROXENE PLAGIOCLASE Replacement: CALCITE CHLORITE CLAY MINERALS PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 734.50 Core: 45 Top of Core Depth (m) : 733.00 Sect: 1 Top of Section Depth(m): 733.00 LITHOLOGY: PLAG-PYX PHYRIC BASALT; Piece No. : PCE 2 (41-45), 3A (47-60), 3B (60-90); Structure : BASALT SILL CUT BY CALCITE+CHLORITE+CLAY+PYRITE VEINS, FROM 49 TO 51CM THERE IS A VEIN OF COARSE (3-4MM) CRYSTALS LIKE TRANSPARENT PALE-GREENISH ZEOL (PHILLIPSITE); Texture : PHYRIC, MORE XTLN PHYRIC THAN REST OF SECTION, COARSER GRAINED, NO GLASSY SPOTS; Phenocrysts: CLINOPYROXENE PLAGIOCLASE Replacement: CALCITE CHLORITE CLAY MINERALS ZEOLITE PROBABLY PHILLIPSITE; Leg : 61 Top/Bottom Interval(mm): 0/1320 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 735.82 Core: 45 Top of Core Depth (m) : 733.00 Sect: 2 Top of Section Depth(m): 734.50 LITHOLOGY: BASALT SILL; IDENTICAL TO INTERVAL (0-40) OF SECTION 45-1; Piece No. : PCE 1 (0-7), 2A (10-17), 2B (16-30), 2C (30-40), 3 (92-110), 4 (112-131); Structure : BASALT SILL, IN GENERAL VEINS ARE FILLED WITH CALCITE+CHLORITE+CLAY+PYRITE; Texture : SLIGHTLY PHYRIC, FINE-GRAINED; Alteration : EXT; Phenocrysts: PLAGIOCLASE CLINOPYROXENE Replacement: CALCITE CHLORITE CLAY MINERALS PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1320 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 735.82 Core: 45 Top of Core Depth (m) : 733.00 Sect: 2 Top of Section Depth(m): 734.50 LITHOLOGY: PLAG-CPX PHYRIC BASALT; IDENTICAL TO INTERVAL (40-92) OF SECTION 45-1; Piece No. : PCE 2D (40-51), 2E (51-70), 2F (70-90); Structure : BASALT SILL, IN GENERAL VEINS ARE FILLED WITH CALCITE+CHLORITE+CLAY+PYRITE; Texture : PHYRIC, MORE COARSE-GRAINED THAN REST OF SECTION; Alteration : EXT; Phenocrysts: PLAGIOCLASE CLINOPYROXENE Replacement: CALCITE CHLORITE CLAY MINERALS PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1110 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 737.11 Core: 45 Top of Core Depth (m) : 733.00 Sect: 3 Top of Section Depth(m): 736.00 LITHOLOGY: BASALT SILL; Piece No. : PCE 1A (0-11), 1B (12-20), 1C (20-35), 1D (35-60), 2 (61-79), 3A (80-100), 3B (100-110); Structure : BASALT SILL, VEINS ARE FILLED WITH CALCITE+CHLORITE+ CLAY+PYRITE; Texture : SLIGHTLY PHYRIC, MEDIUM-GRAINED, NO GLASSY SPOTS, MORE XTLN THAN THE MIDDLE OF THE PREVIOUS SECTION; Phenocrysts: OLIVINE PLAGIOCLASE Replacement: CALCITE CHLORITE CLAY PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 30 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 738.03 Core: 46 Top of Core Depth (m) : 738.00 Sect: 1 Top of Section Depth(m): 738.00 LITHOLOGY: SEDIMENT; Leg : 61 Top/Bottom Interval(mm): 30/1310 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 739.31 Core: 46 Top of Core Depth (m) : 738.00 Sect: 1 Top of Section Depth(m): 738.03 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (5-20), 1B (21-56), 1C (55-66), 1D (67-80), 1E (80-93), 1G (106-131); Structure : MASSIVE DOLERITE SILL WITH VEINS OF CHLORITE+PYRITE; Texture : FROM 5 TO 67CM BASALT VARIES FROM FINE TO SLIGHTLY MEDIUM-GRAINED AND BASALT IS HYALOPILITIC TO INTERSERTAL, A DISTINCT UPPER CHILLED MARGIN WAS NOT FOUND, FROM 67 TO 131CM BASALT IS MEDIUM-GRAINED AND INTERSERTAL TO INTERGRANULAR AND THERE IS NO GLASS A IN THE TOP INTERVAL; Alteration : MOD TO EXT MICROPHENOS OFTEN ALTERED, GNDMASS ALSO APPEARS TO BE BADLY ALTERED; Phenocrysts: CLINOPYROXENE MICROPHENOS; Replacement: CLAY MINERALS Minerals Replaced: CPX CHLORITE PYRITE Comments : COLOR OF BASALT PCES 1A-1C IS MEDIUM LIGHT GRAY (N6), COLOR OF BASALT PCES 1D-1G IS MEDIUM GRAY (N5); Leg : 61 Top/Bottom Interval(mm): 0/1330 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 740.83 Core: 46 Top of Core Depth (m) : 738.00 Sect: 2 Top of Section Depth(m): 739.50 LITHOLOGY: MASSIVE DOLERITE SILL; SAME CONSTITUENT MINERALS AS SECTION 1; Piece No. : PCE 1A (0-6), 1B (7-24), 2A (25-41), 2B (41-51), 2C (51-56), 3A (58-80), 3B (80-95), 3C (89-102), 3D (101-113), 4 (119-133); Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE+PYRITE; Texture : SLIGHTLY MEDIUM TO MEDIUM-GRAINED, INTERSERTAL TO INTERGRANULAR; Alteration : MOD TO EXT; Comments : SAME UNIT AS SECTION 46-1; Phenocrysts: CLINOPYROXENE MICROPHENOS; Replacement: CHLORITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1250 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 742.25 Core: 46 Top of Core Depth (m) : 738.00 Sect: 3 Top of Section Depth(m): 741.00 LITHOLOGY: MASSIVE DOLERITE SILL; SAME CONSTITUENT MINERALS AS SECTION 1; Piece No. : PCE 1 (1-28), 2A (31-51), 2B (52-70), 2C (70-78), 2D (78-95), 2E (95-125); Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE+PYRITE; Texture : SLIGHTLY MEDIUM TO MEDIUM-GRAINED, INTERSERTAL TO INTERGRANULAR; Alteration : MOD; Comments : SAME UNIT AS SECTION 46-2; Phenocrysts: CLINOPYROXENE MICROPHENOS; Replacement: CHLORITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 710 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 743.21 Core: 46 Top of Core Depth (m) : 738.00 Sect: 4 Top of Section Depth(m): 742.50 LITHOLOGY: MASSIVE DOLERITE SILL; SAME CONSTITUENT MINERALS AS 46-1; Piece No. : PCE 1A (2-22), 1B (24-71); Structure : MASSIVE DOLERITE SILL, PYRITE+CHLORITE VEINS; Texture : MICROPHYRIC, SLIGHTLY MEDIUM TO MEDIUM-GRAINED, INTERSERTAL TO INTERGRANULAR; Alteration : MOD; Comments : SAME UNIT AS 46-3; Phenocrysts: CLINOPYROXENE MICROPHENOS; Replacement: PYRITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 710/1400 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 743.90 Core: 46 Top of Core Depth (m) : 738.00 Sect: 4 Top of Section Depth(m): 743.21 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 2A (71-90), 2B (110-140); Structure : MASSIVE DOLERITE SILL, PYRITE+CHLORITE VEINS; Texture : MEDIUM TO SLIGHTLY COARSE-GRAINED, INTERGRANULAR TO SUBOPHITIC; Alteration : MOD; Phenocrysts: CLINOPYROXENE PLAGIOCLASE MAGNETITE MAGN ID CERTAIN; Groundmass : CLINOPYROXENE MICROLITES; PLAGIOCLASE MICROLITES; MAGNETITE MICROLITES; Replacement: PYRITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1300 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 745.30 Core: 46 Top of Core Depth (m) : 738.00 Sect: 5 Top of Section Depth(m): 744.00 LITHOLOGY: MASSIVE DOLERITE SILL; SAME MINERAL CONSTITUENTS AS SECTIONS 46-1 AND 46-4; Piece No. : PCE 1 (1-41), 2 (45-65), 3 (70-83), 4 (90-97), 5 (100-120), 6 (122-130); Structure : MASSIVE DOLERITE SILL, VEINS OF PYRITE+CHLORITE; Texture : MICROPHYRIC, GRAIN SIZE DECREASES DOWNWARD FROM SLIGHTLY COARSE TO FINE-GRAINED; Alteration : MOD; Comments : SAME UNIT AS 46-4; Phenocrysts: CLINOPYROXENE MICROPHENOS; Replacement: PYRITE CHLORITE Structure : PCE 6 MAY BE NEAR A CONTACT WITH SEDIMENT; Texture : CHILLED MARGIN IS NOT FOUND IN PCE 6; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 748.50 Core: 47 Top of Core Depth (m) : 747.00 Sect: 1 Top of Section Depth(m): 747.00 LITHOLOGY: CPX MOD PHYRIC BASALT; Piece No. : PCE 1 (0-2), 2 (4-11), 3 (15-20), 4 (24-30), 5 (32-39), 6 (41-45), 7 (46-65), 8 (66-92), 9 (94-99), 10 (101-105), 11 (107-112), 12 (115-149); Structure : ABUNDANT VEINS AND CRACKS ARE FILLED WITH PYRITE+ CHLORITE+CLAY; Texture : MOD PHYRIC, GLASSY MARGINS ARE UP TO 13MM THICK AND VERY ABUNDANT, TEXTURES OF THE INTERIOR CRYSTALLINE PORTION IS SPOTTED AND HETEROGENEOUS; LITHOLOGY: SLIGHTLY; Phenocrysts: CLINOPYROXENE ( 3-4%) Size(mm): 0.2-0.4 Groundmass : ZEOLITE ZEOLITES (PHILLIPSITE) ARE PREFERENTIALLY ASSOCIATED WITH GLASS, GNDMASS VARIES FROM GLASSY+ VARIOLITIC+EQUIGRANULAR; Alteration : SOME CLAY ALTERATION IS VISIBLE AS SPOTS OR CUT SURFACES; Replacement: CLAY Leg : 61 Top/Bottom Interval(mm): 0/1420 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 749.92 Core: 47 Top of Core Depth (m) : 747.00 Sect: 2 Top of Section Depth(m): 748.50 LITHOLOGY: CPX MOD PHYRIC BASALT; SAME AS PREVIOUS SECTION; Piece No. : PCE 1 (2-30), 2 (34-42), 3 (45-131), 4 (135-142); Structure : ABUNDANT VEINS FILLED WITH PYRITE+CHLORITE+CLAY; Texture : MOD PHYRIC, GNDMASS VARIES FROM GLASSY TO VARIOLITIC TO EQUIGRANULAR, GLASSY MARGINS ARE UP TO 13MM THICK BUT ARE LESS ABUNDANT THAN SECTION 47-2, TEXTURES OF THE INTERIOR CRYSTALLINE PORTION IS SPOTTED AND HETEROGENEOUS, FROM 45 TO 114CM GRAIN SIZE INCREASES, PCE 4 IS FINER-GRAINED THAN ABOVE; Alteration : SLIGHTLY SOME CLAY ALTERATION IS VISIBLE AS SPOTS ON CUT SURFACES; Phenocrysts: CLINOPYROXENE ( 3-4%) Size(mm): 0.2-0.4 Replacement: PYRITE CHLORITE CLAY MINERALS ZEOLITE PHILLIPSITE, ZEOLITES ARE PREFERENTIALLY ASSOCIATED WITH GLASS; Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 751.49 Core: 47 Top of Core Depth (m) : 747.00 Sect: 3 Top of Section Depth(m): 750.00 LITHOLOGY: CPX MOD PHYRIC BASALT; SAME TEXTURE AND ALTERATION AND GENERAL ASPECT AS PREVIOUS TWO SECTIONS; Piece No. : PCE 1 (0-5), 2 (5-10), 3 (11-37), 4 (40-70), 5 (75-88), 6 (91-99), 7 (101-122), 8 (124-149); Structure : VEINS FILLED WITH PYRITE+CHLORITE+CLAY; Texture : MOD PHYRIC, GLASSY MARGINS ARE TO 13MM THICK, TEXTURES OF THE INTERIOR CRYSTALLINE PORTION IS SPOTTED AND HETEROGENEOUS, FROM 77 TO 100CM BASALT BECOMES MORE COARSE-GRAINED, FROM 100 TO 120CM GRAIN SIZE DECREASES; Alteration : SLIGHTLY SOME CLAY ALTERATION IS VISIBLE AS SPOTS ON CUT SURFACES; Phenocrysts: CLINOPYROXENE ( 3-4%) Size(mm): 0.2-0.4 Replacement: PYRITE CHLORITE CLAY MINERALS ZEOLITE PHILLIPSITE, ZEOLITES ARE PREFERENTIALLY ASSOCIATED WITH GLASS, ZEOLITE FRAGMENTS OCCUR AT 5-10CM (PCE 2); Groundmass : GLASSY TO VARIOLITIC TO EQUIGRANULAR; Leg : 61 Top/Bottom Interval(mm): 0/ 140 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 756.14 Core: 48 Top of Core Depth (m) : 756.00 Sect: 1 Top of Section Depth(m): 756.00 LITHOLOGY: PLAG-CPX SLIGHTLY PHYRIC BASALT; PILLOW BASALT; Piece No. : PCE 1A (0-6), 1B (7-14); Structure : PILLOW BASALT WITH PYRITE+CHLORITE+CLAY VEINS PLUS TRANSPARENT AND WHITE ZEOLITE VEINS; Texture : SLIGHTLY PHYRIC, GLASSY RIM NEAR THE BOTTOM OF THE UNIT; Alteration : FRESH TO EXT PCE 1A IS EXT ALTERED AND PCE 1B IS FRESH; Comments : UNIT 1; Phenocrysts: CLINOPYROXENE Replacement: PYRITE CHLORITE ZEOLITE Vesicles : VESICULAR; Leg : 61 Top/Bottom Interval(mm): 170/ 670 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 756.67 Core: 48 Top of Core Depth (m) : 756.00 Sect: 1 Top of Section Depth(m): 756.17 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 2A (12-25), 2B (25-30), 2C (30-35), 2D (35-43), PCE 2E (42-66); Structure : PILLOW BASALT WITH PYRITE+CHLORITE+CLAY VEINS PLUS TRANSPARENT AND WHITE ZEOLITE VEINS; Texture : FROM 17 TO 27CM BASALT IS APHANITIC AND FROM 27 TO 64CM BASALT IS APHANITIC WITH GLASSY SPOTS, FROM 44 TO 58CM BASALT IS MORE COARSE-GRAINED AND WITHOUT SPOTS, INTERVAL (58-67) IS APHANITIC WITH A LOWER LOWER GLASSY MARGIN; Alteration : EXT; Comments : UNIT 2; Vesicles : INTERVAL (17-27) IS VESICULAR; Replacement: PYRITE CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 680/1160 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 757.16 Core: 48 Top of Core Depth (m) : 756.00 Sect: 1 Top of Section Depth(m): 756.68 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 3A (68-97), 3B (97-105), 3C (105-116); Structure : PILLOW BASALT WITH PYRITE+CHLORITE+CLAY VEINS PLUS TRANSPARENT AND WHITE ZEOLITE VEINS; Texture : INTERVALS (79-85) AND (114-116) ARE APHANITIC, INTERVAL (85-114) IS MORE COARSE-GRAINED; Alteration : FRESH TO ALMOST COMPLETELY NTERVAL (75-95) IS ALMOST COMPLETELY ALTERED; Comments : UNIT 3, INTERVAL (68-79) WAS NOT DESCRIBED; Replacement: PYRITE CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 1230/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 757.50 Core: 48 Top of Core Depth (m) : 756.00 Sect: 1 Top of Section Depth(m): 757.23 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 4A (125-131), 4B (130-140), 4C (140-147), 4D (147-150); Structure : PILLOW BASALT WITH PYRITE+CHLORITE+CLAY VEINS PLUS TRANSPARENT AND WHITE ZEOLITE VEINS; Texture : BASALT IS APHANITIC NEAR THE TOP (16CM) AND BOTTOM (2CM), COARSE-GRAINED NEAR THE MIDDLE; Alteration : FRESH; Comments : UNIT 4; Replacement: PYRITE CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 759.00 Core: 48 Top of Core Depth (m) : 756.00 Sect: 2 Top of Section Depth(m): 757.50 LITHOLOGY: PILLOW BASALT; SAME BASALTS AS ABOVE SECTION; Piece No. : PCE 1A (0-5), 1B (6-15), 1C (15-25), 1D (25-31), 1E (32-37), 1F (38-46), 2A (51-56), 2B (56-65), 2C (65-75), 2D (75-80), 2E (81-90), 2F (90-100), 2G (101-105), 3A (107-115), 3B (115-125), 3C (125-140), 3D (145-150); Structure : CALCITE+PYRITE+CLAY VEINS PLUS TRANSPARENT AND WHITE ZEOLITE VEINS; Texture : GLASSY MARGINS WITH 4 BASALT UNITS, INTERVAL(125-150 IS MEDIUM-GRAINED; Comments : 3 BASALT UNITS, UNIT 1 OCCURS FROM 0-49CM, UNIT 2 OCCURS FROM 50-104CM, UNIT 3 OCCURS FROM 116-150CM; Replacement: CALCITE ( RARE%) CHLORITE CLAY MINERALS ZEOLITE TRANSPARENT AND WHITE; Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 760.49 Core: 48 Top of Core Depth (m) : 756.00 Sect: 3 Top of Section Depth(m): 759.00 LITHOLOGY: PILLOW BASALT; SAME PILLOW BASALT AS ABOVE SECTION; Piece No. : PCE 1A (0-25), 1B (26-29), 2A (31-40), 2B (40-50), 2C (50-56), 2D (56-63), 2E (63-74), 2F (73-79), 3A (81-85), 3B (86-97), 3C (97-109), 3D (106-115), 4A (118-125), 4B (125-130), 4C (131-140), 4D (140-149); Structure : PILLOW BASALT WITH CALCITE+CHLORITE+CLAY VEINS PLUS TRANSPARENT AND WHITE ZEOLITE VEINS, INTERVAL (135-137) VEINS OF DRUSE OF FIBROUS-RADIATING ZEOLITE ARE PRESENT; Texture : 3 BASALT UNITS WITH GLASSY MARGINS, INTERVAL (115-117) IS APHANITIC; Alteration : EXT PCES 1A+2A+2B+2D+3B+4A-4D; Comments : 3 BASALT UNITS, INTERVAL (0-30) IS THE SAME UNIT (4) AS THE PREVIOUS SECTION (48-2), UNIT 1 INTERVAL (30-80), UNIT 2 INTERVAL (80-118), UNIT 3 INTERVAL (118-150); Replacement: CALCITE ( RARE%) CHLORITE CLAY MINERALS ZEOLITE TRANSPARENT AND WHITE; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 762.00 Core: 48 Top of Core Depth (m) : 756.00 Sect: 4 Top of Section Depth(m): 760.50 LITHOLOGY: PILLOW BASALT; SAME PILLOW BASALT AS ABOVE SECTION; Piece No. : PCE 1A (0-10), 2A (11-18), 2B (18-26), 2C (26-39), 2D (40-56), 2E (56-70), 2F (70-75), 3A (76-96), 3B (96-100), 3C (100-110), 4A (110-121), 4B (121-126), 4C (126-135), 4D (135-150); Structure : PILLOW BASALT, CALCITE(RARE)+CHLORITE+CLAY VEINS, INTERVAL (101-102) THICK VEIN OF FIBROUS-RADIATED PINK ZEOLITE WITH CUBIC PYRITE; Texture : SLIGHTLY PHYRIC, 3 NEW BASALT UNITS WITH GLASSY MARGINS; Alteration : PCES 2A-2D+3A+4A ARE ALTERED; Comments : INTERVAL (0-10) IS BOTTOM OF PREVIOUS UNIT FROM SECTION 48-4, 4 NEW BASALT UNITS, UNIT 1 INTERVAL (10-74), UNIT 2 INTERVAL (76-109), UNIT 3 INTERVAL (111-150); Replacement: CALCITE ( RARE%) CHLORITE CLAY MINERALS ZEOLITE TRANSPARENT AND WHITE, ALSO FIBROUS RADIATED PINK; PYRITE CUBIC; Leg : 61 Top/Bottom Interval(mm): 0/1100 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 763.10 Core: 48 Top of Core Depth (m) : 756.00 Sect: 5 Top of Section Depth(m): 762.00 LITHOLOGY: PILLOW BASALT; SIMILAR TO ABOVE SECTIONS; Piece No. : PCE 1A (0-14), 1B (15-20), 1C (20-26), 1D (27-35), 1E (35-42), 1F (43-52), 2 (61-71), 3 (73-79), 4 (80-86), 5 (88-95), 6 (96-99), 7 (99-100), 8 (101-105), 9 (107-110); Structure : PILLOW BASALT WITH CALCITE(RARE)+CHLORITE+CLAY VEINS AND ZEOLITE VEINS; Texture : SLIGHTLY PHYRIC, INTERVAL (60-110) (CORE CATCHER) IS APHANITIC WITH GLASSY PILLOW AND FINE-GRAINED; Comments : INTERVAL (0-60) IS THE BOTTOM OF THE UNIT FROM THE PREVIOUS SECTION (48-4), PCES IN INTERVAL (60-110) (CORE CATCHER) DO NOT HAVE KNOWN ORIENTATIONS; Replacement: CALCITE ( RARE%) CHLORITE CLAY MINERALS ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 766.49 Core: 49 Top of Core Depth (m) : 765.00 Sect: 1 Top of Section Depth(m): 765.00 LITHOLOGY: APHYRIC TO CPX-PLAG MICROPHYRIC BASALT; Piece No. : PCE 1 (0-5), 2 (5-10), 3 (11-18), 4 (20-26), 5 (29-34), 6 (36-41), 7 (45-54), 8A (55-60), 8B (60-65), 8C (65-75), 8D (75-89), 8E (89-95), 8F (95-104), 8G (103-110), 8H (109-120) 8I (122-149); Structure : VEINS FILLED WITH CHLORITE+PYRITE; Texture : APHYRIC TO MICROPHYRIC, HYALOPILITIC-ESPECIALLY LOWER PART OF PCE 7, AT INTERVAL (56-58) IS A MEDIUM LIGHT GRAY (N6) CHILLED MARGIN, INTERVAL (56-68) IS FINE-GRAINED, INTERVAL (68-103) IS FINE- GRAINED, INTERVAL (103-150) IS MEDIUM-GRAINED AND INTERSERTAL TO INTERGRANULAR; Comments : PCES 1-7 WERE NEAR CONTACT WITH SEDIMENT OR LOWER IGNEOUS ROCK, AT INTERVAL (56-68) BASALT IS MEDIUM LIGHT GRAY (N6), AT INTERVAL (68-150) BASALT COLOR IS MEDIUM DARK GRAY (N4); Alteration : SLIGHTLY; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS, AT INTERVAL (0-54) CPX>PLAG IN ABUNDANCE, AT INTERVAL (68-103) PLAG>CPX IN ABUNDANCE; Replacement: CHLORITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1410 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 767.91 Core: 49 Top of Core Depth (m) : 765.00 Sect: 2 Top of Section Depth(m): 766.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-17), 1B (16-30), 1C (31-40), 1D (40-48), 2 (50-62), 3 (64-73), 4 (75-82), 5A (84-102), 5B (104-120), 6 (127-140); Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE+PYRITE; Texture : SLIGHTLY MEDIUM TO MEDIUM-GRAINED, INTERSERTAL TO INTERGRANULAR; Alteration : SLIGHTLY; Comments : SAME UNIT AS IN THE LOWER PART OF SECTION 49-1; Phenocrysts: PLAGIOCLASE MICROPHENOS; CLINOPYROXENE MICROPHENOS, AT INTERVAL (0-74) CPX ABOUT EQUAL TO PLAG IN ABUNDANCE, AT INTERVAL (74-141) PLAG>CPX IN ABUNDANCE; Leg : 61 Top/Bottom Interval(mm): 0/1420 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 769.42 Core: 49 Top of Core Depth (m) : 765.00 Sect: 3 Top of Section Depth(m): 768.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1 (2-20), 2A (22-27), 2B (28-40), 3 (40-55), 4 (55-79), 5A (80-95), 5B (95-119), 6 (124-140); Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE+PYRITE; Texture : DOLERITE, SLIGHTLY MEDIUM TO MEDIUM-GRAINED, INTERGRANULAR TO INTERSERTAL; Alteration : SLIGHTLY; Comments : SAME UNIT AS IN SECTIONS 49-1 AND 49-2; Replacement: CHLORITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 600 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 770.10 Core: 49 Top of Core Depth (m) : 765.00 Sect: 4 Top of Section Depth(m): 769.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1 (2-20), 2A (24-37), 2B (37-47), 3 (51-58); Structure : MASSIVE DOLERITE SILL; Texture : DOLERITE, SLIGHTLY MEDIUM TO MEDIUM-GRAINED, INTERSERTAL TO INTERGRANULAR; Alteration : SLIGHTLY SEE SECTION 49-1; Comments : SAME UNIT AS SECTION 49-4; Leg : 61 Top/Bottom Interval(mm): 0/1190 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 775.19 Core: 50 Top of Core Depth (m) : 774.00 Sect: 1 Top of Section Depth(m): 774.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-12), 1B (12-29), 1C (26-60), 1D (58-85), 1E (81-94), 1F (95-112); Texture : HOMOGENEOUS MEDIUM-GRAINED, SUBOPHITIC TO INTERGRANULAR; Structure : MASSIVE DOLERITE SILL; Alteration : SLIGHTLY; Comments : SAME UNIT AS CORE 49; Phenocrysts: PLAGIOCLASE Size(mm): 0.8 CLINOPYROXENE MICROPHENOS, EQUAL AMOUNT TO PLAG, OFTEN FORMING AGGREGATES; Groundmass : PLAGIOCLASE CLINOPYROXENE MAGNETITE MICROLITES; Replacement: CHLORITE Minerals Replaced: CPX SPOTTED DISTRIBUTION; Leg : 61 Top/Bottom Interval(mm): 0/1280 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 776.78 Core: 50 Top of Core Depth (m) : 774.00 Sect: 2 Top of Section Depth(m): 775.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-50), 1B (50-64), 1C (64-125); Texture : INTERVAL (0-35) IS MEDIUM TO SLIGHTLY COARSE- GRAINED, REMAINS SLIGHTLY COARSE-GRAINED TO 150CM WITH THE EXCEPTION OF GRANOPHYRIC SCHLIEREN AT 101-102CM AND 119-121CM, MEDIUM-GRAINED BASALT IS SUBOPHITIC TO INTERGRANULAR, THE SLIGHTLY COARSE- GRAINED BASALT IS SUBOPHITIC, MICROPHENOS IN THE SLIGHTLY COARSE-GRAINED BASALT ARE MORE FREQUENTLY ABSORBED THAN IN THE MEDIUM-GRAINED BASALT, THE GRANOPHYRE LAYERS ARE MADE OF PHENOS OF PLAG AND CPX AND MAGN PLUS A SMALL AMOUNT OF MICROPEGMATITE; Structure : MASSIVE DOLERITE SILL; Phenocrysts: PLAGIOCLASE Size(mm): 1.5 CLINOPYROXENE MAGNETITE MICROPHENOS; Replacement: CHLORITE Minerals Replaced: CPX SPOTTY DISTRIBUTION; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 778.50 Core: 50 Top of Core Depth (m) : 774.00 Sect: 3 Top of Section Depth(m): 777.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-36), 1B (36-47), 1C (47-110), 1D (110-127), 1E (128-150); Texture : COARSE-GRAINED, SUBOPHITIC TO OPHITIC; Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE+ZEOLITE(PHILLIPSITE)+PYRITE, GRANOPHYRE SCHLIEREN OCCURS AT 14 TO 18CM (2 TO 3MM PHENOS) AND 47 TO 53CM (2 TO 3MM PHENOS) AND 124 TO 133CM (5MM PHENOS); Alteration : MOD; Comments : SAME UNIT AS SECTION 50-2; Phenocrysts: PLAGIOCLASE MICROPHENOS, 2 TO 3MM AT INTERVALS (14-18) AND (47-53), 5MM AT INTERVAL (124-133); Replacement: CHLORITE ZEOLITE PHILLIPSITE; PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 779.99 Core: 50 Top of Core Depth (m) : 774.00 Sect: 4 Top of Section Depth(m): 778.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-15), 1B (15-27), 1C (27-66), 1D (67-81), 1E (82-105), 1F (105-149); Texture : GRAIN SIZE DECREASES DOWNWARD FROM COARSE TO SLIGHTLY COARSE, SUBOPHITIC TO INTERSERTAL, (SEE SECTION 50-4); Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE+ZEOLITE(PHILLIPSITE) AND PYRITE; Alteration : MOD; Comments : SAME UNIT AS SECTION 50-3; Replacement: CHLORITE ZEOLITE PHILLIPSITE; PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1410 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 781.41 Core: 50 Top of Core Depth (m) : 774.00 Sect: 5 Top of Section Depth(m): 780.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-18), 1B (19-39), 1C (39-47), 1D (47-55), 1E (55-71), 1F (72-76), 1G (76-85), 1H (87-100), 1I (100-108), 1J (107-117), 1K (117-125), 1L (125-130), 1M (130-141); Texture : GRAIN SIZE DECREASING SLIGHTLY FROM SLIGHTLY COARSE TO MEDIUM, INTERGRANULAR TO INTERSERTAL (SEE 50-2); Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE+ZEOLITE(PHILLIPSITE)+PYRITE; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 50-4; Replacement: CHLORITE ZEOLITE PHILLIPSITE; PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 782.98 Core: 50 Top of Core Depth (m) : 774.00 Sect: 6 Top of Section Depth(m): 781.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-10), 1B (12-20), 1C (21-30), 1D (30-35), 1E (35-50), 1F (50-62), 1G (62-70), 1H (70-76), 1I (77-90), 1J (91-99), 1K (100-120), 1L (120-130), 1M (131-148); Texture : HOMOGENEOUSLY MEDIUM-GRAINED, INTERGRANULAR TO INTERSERTAL (SEE 50-1); Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE+ZEOLITE(PHILLIPSITE)+PYRITE; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 50-5; Leg : 61 Top/Bottom Interval(mm): 0/1460 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 779.96 Core: 51 Top of Core Depth (m) : 778.50 Sect: 1 Top of Section Depth(m): 778.50 LITHOLOGY: MICRODOLERITES; MASSIVE BASALT SILL; Piece No. : PCE 1A (0-6), 1B (5-15), 1C (15-22), 1D (22-32), 1E (33-35), 1F (35-56), 1G (57-62), 1H (62-66), 1I (67-71), 1J (71-96), 1K (96-100), 1L (105-115), 1M (115-129), 1N (129-145); Texture : HOMOGENEOUSLY MEDIUM-GRAINED MICRODOLERITE, NO VISIBLE VARIATION OF GRAIN SIZE; Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH PYRITE+ CHLORITE+CLAY; Alteration : FRESH GNDMASS IS VERY FRESH EXCEPT SMALL DISSEMINATED PALE GREEN CLAY PSEUDOMORPHS AFTER OL(?); Replacement: CHLORITE CLAY MINERALS Minerals Replaced: OL DISSEMINATED PALE GREEN CLAY PSEUDOMORPHS AFTER OL?; ZEOLITE Groundmass : PLAGIOCLASE CLINOPYROXENE MAGNETITE OLIVINE ID UNCERTAIN; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 781.50 Core: 51 Top of Core Depth (m) : 778.50 Sect: 2 Top of Section Depth(m): 780.00 LITHOLOGY: MICRODOLERITES; MASSIVE BASALT SILL; SAME MICRODOLERITE AS SECTION 51-1; Piece No. : PCE 1A (0-12), 1B (12-20), 1C (20-23), 1D (23-30), 1E (30-35), 1F (36-44), 1G (44-51), 1H (42-61), 1I (62-75), 1J (75-85), 1K (85-94), 1L (94-98), 1M (98-106), 1N (107-115), 1O (116-150); Texture : HOMOGENEOUSLY MEDIUM-GRAINED MICRODOLERITE; Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH PYRITE+ CHLORITE+CLAY; Alteration : SLIGHTLY GNDMASS IS VERY FRESH EXCEPT SMALL DISSEMINATED PALE GREEN CLAY PSEUDOMORPHS AFTER OL(?); Groundmass : PLAGIOCLASE CLINOPYROXENE MAGNETITE OLIVINE ID UNCERTAIN; Replacement: PYRITE CHLORITE CLAY MINERALS Minerals Replaced: OL PALE GREEN CLAY PSEUDOMORPHS; ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/ 530 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 782.03 Core: 51 Top of Core Depth (m) : 778.50 Sect: 3 Top of Section Depth(m): 781.50 LITHOLOGY: MICRODOLERITES; SAME MICRODOLERITE AS SECTION 51-2; Piece No. : PCE 1A (0-16), 1B (16-21), 1C (22-30), 1D (30-53); Texture : APHYRIC, MEDIUM-GRAINED; Structure : VEINS FILLED WITH PYRITE+CHLORITE+CLAY+ZEOLITE; Alteration : SLIGHTLY; Groundmass : PLAGIOCLASE CLINOPYROXENE MAGNETITE OLIVINE ID UNCERTAIN; Replacement: PYRITE CHLORITE CLAY MINERALS Minerals Replaced: OL PALE GREEN CLAY PSEUDOMORPHS; ZEOLITE Leg : 61 Top/Bottom Interval(mm): 530/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 783.00 Core: 51 Top of Core Depth (m) : 778.50 Sect: 3 Top of Section Depth(m): 782.03 LITHOLOGY: MICRODOLERITE; Piece No. : PCE 1E (53-60), 1F (61-75), 1G (75-90), 1H (90-100), 1I (100-110), 1J (110-121), 1K (121-150); Texture : GRADUALLY MORE FINE-GRAINED THAN ABOVE, AT (140-148) A ROUNDED APHANITIC SEPARATION APPEARS TO BE DUE TO LOCAL QUENCH NEAR BOTTOM OF SILL; Structure : VEINS FILLED WITH PYRITE+CHLORITE+CLAY+ZEOLITE; Alteration : SLIGHTLY; Replacement: PYRITE CHLORITE CLAY MINERALS ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/ 230 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 783.23 Core: 51 Top of Core Depth (m) : 778.50 Sect: 4 Top of Section Depth(m): 783.00 LITHOLOGY: BASALT SILL; Piece No. : PCE 1A (0-6), 1B (6-11), 1C (11-17), 1D (17-23); Texture : FINE-GRAINED TO APHANITIC; Structure : BOTTOM OF SILL, VEINS FILLED WITH PYRITE+CHLORITE+ CLAY+ZEOLITE; Alteration : SLIGHTLY; Leg : 61 Top/Bottom Interval(mm): 230/ 300 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 783.30 Core: 51 Top of Core Depth (m) : 778.50 Sect: 4 Top of Section Depth(m): 783.23 LITHOLOGY: BASALTIC GLASS; Piece No. : PCE 1E (23-30); Texture : COARSE PCE OF DARK-BROWN GLASS; Structure : CUT BY ZEOLITE VEINS; Alteration : SLIGHTLY ALTERED AROUND OUTER SURFACE TO CHLORITE+HEMATITE+ CLAY; Replacement: CHLORITE HEMATITE CLAY MINERALS ZEOLITE Comments : DARK BROWN; Leg : 61 Top/Bottom Interval(mm): 300/ 950 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 783.95 Core: 51 Top of Core Depth (m) : 778.50 Sect: 4 Top of Section Depth(m): 783.30 LITHOLOGY: APHANITIC BASALT TO MICRODOLERITES; Piece No. : PCE 2 (32-94); Texture : APHANITIC BASALT WITH GLASSY MARGINS AND FINE- GRAINED TO MEDIUM-GRAINED MICRODOLERITES; Alteration : SLIGHTLY; Comments : SMALL PCES FROM CORE CATCHER; Leg : 61 Top/Bottom Interval(mm): 0/1460 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 788.96 Core: 52 Top of Core Depth (m) : 787.50 Sect: 1 Top of Section Depth(m): 787.50 LITHOLOGY: DOLERITE; Piece No. : PCE 1 (1-139); Texture : A FEW (<1%) CPX PHENOS (0.5MM) IN A VERY HOMOGENEOUS DIABASE, MINOR GRAIN SIZE VARIATION IS APPARENT; Structure : VEINS OF GREEN CLAY (84-37)+QTZ (105-112)+PYRITE; Alteration : SLIGHTLY THERE ARE A FEW PATCHES OF BROWN CLAY; Comments : CLEARLY ONE UNIT; Replacement: CLAY GREEN AND BROWN CLAY; PYRITE Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): 0.5 Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 790.48 Core: 52 Top of Core Depth (m) : 787.50 Sect: 2 Top of Section Depth(m): 789.00 LITHOLOGY: DOLERITE; Piece No. : PCE 1 (0-148); Structure : GREEN CLAY VEINS ARE COMMON; Texture : HOMOGENEOUS COARSE-GRAINED DOLERITE, NO VISIBLE CLAY PATCHES AS IN SECTION 52-1; Replacement: CLAY MINERALS GREEN CLAY FILLING VEINS; Leg : 61 Top/Bottom Interval(mm): 0/1210 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 791.71 Core: 52 Top of Core Depth (m) : 787.50 Sect: 3 Top of Section Depth(m): 790.50 LITHOLOGY: DOLERITE; SIMILAR TO THAT DESIRED ABOVE; Piece No. : PCE 1 (0-65), 2 (67-72), 3 (75-85), 4 (87-100), 5 (101-106), 6 (110-128); Texture : FINE-GRAINED, GRAIN SIZE DECREASES DOWNWARD; Alteration : SAME ALTERATION AS PREVIOUS SECTION; Comments : GREY MATRIX; Phenocrysts: ( 1-2%) Size(mm): 0.2-0.5 MAFIC PHENOS; Replacement: CLAY MINERALS GREEN CLAY FILLING VEINS; Leg : 61 Top/Bottom Interval(mm): 0/ 510 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 792.51 Core: 52 Top of Core Depth (m) : 787.50 Sect: 4 Top of Section Depth(m): 792.00 LITHOLOGY: FINE-GRAINED BASALT; SIMILAR TO THE BOTTOM OF 52-3; Piece No. : PCE 1 (1-41), 2 (44-50); Texture : FINE-GRAINED, PCE 2 (43-52) HAS A THIN (49-50) PCE OF GLASS IN CONTACT WITH FINE-GRAINED BASALT NEAR THE BOTTOM OF PCE 2; Alteration : SLIGHTLY; Comments : ONLY PCE 2 IS ORIENTED, ALL OTHER PCES ARE UNORIENTED AND OUT OF STRATIGRAPHIC ORDER; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 793.50 Core: 53 Top of Core Depth (m) : 792.00 Sect: 1 Top of Section Depth(m): 792.00 LITHOLOGY: CPX-PLAG MICROPHYRIC BASALT; MASSIVE BASALT; Piece No. : PCE 1A (0-16), 1B (16-22), 1C (21-31), 1D (32-41), 1E (42-50), 2 (54-60), 3 (62-73), 4A (76-85), 4B (85-100), 5 (101-104), 6 (114-125), 7A (129-140), 7B (140-150); Texture : MICROPHYRIC, UNIT 1 (PCES 1A-2) IS FINE-GRAINED, THIN (1CM) GLASSY MARGINS AT THE TOP AND BOTTOM OF THE UNIT, GRAIN SIZE INCREASES IN INTERVAL (1-25) TO A FINE-GRAIN SIZE AND DECREASES IN INTERVAL (25-59), APHYRIC TO HYALOPILITIC, IN UNIT 2 (PCES 3-7B) BASALT IS FINE-GRAINED WITH THIN (2CM) UPPER GLASSY MARGIN, GRAIN SIZE INCREASES DOWNWARD FROM 62CM; Structure : MASSIVE BASALT, VEINS FILLED WITH CHLORITE+PYRITE; Alteration : SLIGHTLY; Comments : UNIT 1 (0-60) AND UNIT 2 (61-150); Phenocrysts: CLINOPYROXENE MICROPHENOS; PLAGIOCLASE MICROPHENOS; Groundmass : CLINOPYROXENE PLAGIOCLASE Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 794.95 Core: 53 Top of Core Depth (m) : 792.00 Sect: 2 Top of Section Depth(m): 793.50 LITHOLOGY: BASALT SILL; Piece No. : PCE 1 (1-18), 2A (23-34), 2B (34-45), 3A (50-57), 3B (57-66), 3C (67-72), 3D (73-84), 3E (84-105), 3F (105-111), 3G (112-120), 3H (120-128), 3I (129-137), 3J (136-145); Texture : PCES 1-3F ARE HYALOPILITIC, PCES 3G-3J ARE INTERSERTAL, GRAIN SIZE INCREASES DOWNWARD FROM FINE TO SLIGHTLY MEDIUM; Structure : BASALT SILL, VEINS ARE FILLED WITH CHLORITE+ZEOLITE+ PYRITE; Alteration : SLIGHTLY; Comments : SAME UNIT AS LOWER ONE IN SECTION 53-1; Replacement: CHLORITE ZEOLITE PYRITE FILLING VEINS; Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 798.99 Core: 54 Top of Core Depth (m) : 797.50 Sect: 1 Top of Section Depth(m): 797.50 LITHOLOGY: OL-CPX-PLAG MICROPHYRIC BASALT; MASSIVE PILLOW BASALT; Piece No. : PCE 1 (1-5), 2A (8-20), 2B (23-25), 3 (30-40), 4 (42-47), 5A (50-60), 5B (60-65), 6 (69-78), 7A (83-90), 7B (90-100), 7C (100-105), 8A (112-115), 8B (117-120), 8C (120-130), 8D (130-140), 8E (140-149); Texture : MICROPHYRIC, GLASSY UNITS BETWEEN UNITS ARE 1-2CM, INNER PART OF EACH UNIT IS SLIGHTLY MEDIUM TO FINE- GRAINED (APHANITIC), UNIT 1 IS WITHOUT AN UPPER PART AND ONLY HAS A LOWER CHILLED MARGIN, UNITS 2-4 HAVE LOWER AND UPPER GLASSY MARGINS, UNIT 5 ONLY HAS A GLASSY UPPER MARGIN; Structure : PILLOW BASALT; Alteration : SLIGHTLY; Comments : UNIT 1 IS INTERVAL (0-20), UNIT 2 IS INTERVAL (20-58), UNIT 3 IS INTERVAL (58-90), UNIT 4 IS INTERVAL (90-120), UNIT 5 IS INTERVAL (120-NEXT SECTION); Phenocrysts: OLIVINE CLINOPYROXENE PLAGIOCLASE Groundmass : CLINOPYROXENE PLAGIOCLASE MAGNETITE GLASS IN GNDMASS; Leg : 61 Top/Bottom Interval(mm): 0/1300 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 800.30 Core: 54 Top of Core Depth (m) : 797.50 Sect: 2 Top of Section Depth(m): 799.00 LITHOLOGY: MASSIVE PILLOW BASALT; CONTINUED FROM 54-1; Piece No. : PCE 1A (0-17), 1B (18-32), 1C (29-42), 1D (42-51), 2 (55-65), 3A (67-76), 3B (77-84), 3C (84-93), 3D (92-97), 3E (100-110), 3F (110-119), 3G (119-127); Texture : MICROPHYRIC, INNER PART OF EACH UNIT IS SLIGHTLY MEDIUM TO FINE-GRAINED, NO DISTINCT GLASSY MARGINS; Structure : PILLOW BASALT, VEINS OF ZEOLITE(PHILLIPSITE?)+ CHLORITE, MASSIVE; Alteration : SLIGHTLY; Comments : UNIT 5 IS INTERVAL (0-66) AND IS CONTINUED FROM BASALT UNIT OF SECTION 54-1, UNIT 6 IS INTERVAL (66-120?); Phenocrysts: OLIVINE CLINOPYROXENE PLAGIOCLASE Groundmass : CLINOPYROXENE PLAGIOCLASE MAGNETITE GLASS IN GNDMASS; Replacement: CHLORITE ZEOLITE POSSIBLY PHILLIPSITE; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 802.50 Core: 55 Top of Core Depth (m) : 801.00 Sect: 1 Top of Section Depth(m): 801.00 LITHOLOGY: MICRODOLERITES; Piece No. : PCE 1A (0-5), 1B (5-15), 2 (17-30), 3 (33-42), 4 (45-55), 5 (57-64), 6 (70-75), 7A (78-86), 7B (87-92), 8A (95-103), 8B (103-112), 8C (112-120), 9 (122-130), 10 (132-137), 11 (141-149); Texture : TWO UNITS OF MICRODOLERITES DIVIDED BY GLASSY MARGINS, TEXTURE NEAR THE GLASSY MARGINS ARE MICRO- EQUIGRANULAR-WHICH GRADES TO MICRODOLERITES IN THE INTERIOR OF THE UNITS; Structure : VEINS ARE FILLED WITH ZEOLITE DRUSES AND PYRITE+ CHLORITE+CLAY AND CALCITE+CLAY; Alteration : SLIGHTLY; Comments : UNIT 1 IS INTERVAL (0-30), UNIT 2 IS INTERVAL (30-93), UNIT 3 IS INTERVAL (93-130), UNIT 4 IS INTERVAL (130-150); Vesicles : VESICULAR NEAR THE GLASSY MARGINS; Phenocrysts: OLIVINE PLAGIOCLASE Groundmass : PLAGIOCLASE CLINOPYROXENE GLASS IN GNDMASS; MAGNETITE PYROXENE Replacement: CLAY MINERALS Minerals Replaced: OL ZEOLITE CHLORITE CALCITE Leg : 61 Top/Bottom Interval(mm): 0/1050 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 803.55 Core: 55 Top of Core Depth (m) : 801.00 Sect: 2 Top of Section Depth(m): 802.50 LITHOLOGY: MICRODOLERITES; SAME MICRODOLERITES AS IN SECTION 55-1; Piece No. : PCE 1 (0-10), 2 (11-20), 3 (24-32), 4 (37-60), 5 (65-75), 6 (77-90), 7 (91-101); Texture : UNIT 1 DOLERITES ARE THE SAME AS IN SECTION 55-1, IN UNIT 2 SOME SMALL PCES WITH GLASSY MARGINS, IN UNIT MEDIUM-GRAINED-SLIGHTLY PHYRIC MICRODOLERITES SIMILA TO THOSE FROM THE INTERIOR OF SILLS; Structure : VEINS ARE PYRITE+CHLORITE+CLAY; Alteration : SLIGHTLY; Comments : UNIT 1 IS INTERVAL (0-35), UNIT 2 IS INTERVAL (35-62), UNIT 3 (62-104); Phenocrysts: OLIVINE PLAGIOCLASE Groundmass : PLAGIOCLASE CLINOPYROXENE GLASS IN GNDMASS; MAGNETITE PYROXENE Replacement: CLAY MINERALS Minerals Replaced: OL PYRITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 808.00 Core: 56 Top of Core Depth (m) : 806.50 Sect: 1 Top of Section Depth(m): 806.50 LITHOLOGY: MICRODOLERITE; MINERAL COMPOSITION AND TEXTURE AND ALTERATION SAME AS IN ABOVE SECTIONS 55-1+2; Piece No. : PCE 1 (1-4), 2 (6-10), 3 (12-27), 4A (30-35), 4B (35-45), 4C (45-55), 4D (55-43), 4E (63-72), 4F (72-95), 4G (95-112), 4H (112-126), 4I (125-135), 4J (135-145), 4K (145-150); Texture : GRAIN SIZE GRADUALLY CHANGES FROM APHANITIC MICRODOLERITE OR BASALT (AT 0CM) TO MEDIUM-GRAINED DOLERITE (AT 75CM) AND GRADUALLY BACK TO APHANITIC (TO 150CM) MICRODOLERITE OR BASALT; Structure : VEINS FILLED WITH PYRITE+CHLORITE+CLAY; Alteration : SLIGHTLY; Replacement: PYRITE CHLORITE CLAY Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 809.50 Core: 56 Top of Core Depth (m) : 806.50 Sect: 2 Top of Section Depth(m): 808.00 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 1 (0-5), 2 (8-12), 3 (17-22), 4 (25-30), 5 (32-38), 6A (42-50), 6B (50-57), 6C (58-65), 6D (65-71), 7 (75-80), 8 (83-90), 9 (94-100), 10 (100-110), 11 (112-120), 12 (124-130), 13 (131-140), 14 (143-150); Texture : IN (0-25) AND (72-150) GLASSY ZONES ARE 1-2CM THICK, IN INTERVAL (25-72) FINE-GRAINED BASALT GRADES DOWNWARD TO MICRODOLERITE (50CM) AND BACK TO FINE-GRAINED BASALT (72CM); Structure : INTERVALS (0-25) AND (72-150) SMALL PCES OF ALTERED PILLOWED BASALTS, ELONGATION OF GLASSY PILLOW BOTH SUB-HORIZONTALLY AND SUB-VERTICALLY; Alteration : SLIGHTLY; Structure : FROM 92 TO 98CM OCCURS A THICK VEIN IN THE GLASSY MARGIN-THE VEIN IS COARSE FAN-SHAPED AND XTLN AND FILLED WITH TRANSPARENT ZEOLITE; Comments : THERE ARE 4 COOLING UNITS AT (0-25) AND (25-80) AND (80-150?); Replacement: PYRITE CHLORITE CLAY ZEOLITE TRANSPARENT; Leg : 61 Top/Bottom Interval(mm): 0/1030 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 810.53 Core: 56 Top of Core Depth (m) : 806.50 Sect: 3 Top of Section Depth(m): 809.50 LITHOLOGY: APHYRIC BASALT; DOLERITE; Piece No. : PCE 1 (0-5), 2 (7-101); Texture : APHYRIC, FRAGMENTS OF PILLOWED BASALTS AND FINE- GRAINED MICRODOLERITES; Structure : PILLOWED BASALT FRAGMENTS; Alteration : SLIGHTLY; Comments : STRATIGRAPHIC POSITION OF PCES UNKNOWN; Vesicles : Location: Filling: OPAL COARSE VUGS ARE FILLED WITH OPAL; Replacement: OPAL Leg : 61 Top/Bottom Interval(mm): 0/ 70 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 815.57 Core: 57 Top of Core Depth (m) : 815.50 Sect: 1 Top of Section Depth(m): 815.50 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 1 (1-7); Texture : LOWER MARGIN OF PILLOW LAVA, GLASSY AT 5-7CM; Structure : PILLOW BASALT WITH CRACKS AND VEINS OF PYRITE+ CHLORITE+CLAY AND ZEOLITE; Alteration : SLIGHTLY; Replacement: PYRITE CLAY MINERALS CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 80/ 510 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 816.01 Core: 57 Top of Core Depth (m) : 815.50 Sect: 1 Top of Section Depth(m): 815.58 LITHOLOGY: BASALT; Piece No. : PCE 2 (8-17), 3 (20-27), 4 (29-40), 5 (43-51); Texture : WITHOUT LOWER GLASSY MARGIN; Structure : PILLOW BASALT WITH CRACKS AND VEINS OF PYRITE+ CHLORITE+CLAY AND ZEOLITE; Alteration : SLIGHTLY; Comments : SINGLE UNIT; Replacement: PYRITE CLAY MINERALS CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 520/ 610 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 816.11 Core: 57 Top of Core Depth (m) : 815.50 Sect: 1 Top of Section Depth(m): 816.02 LITHOLOGY: APHYRIC TO HYALOPILITIC BASALT; Piece No. : PCE 6 (52-61); Texture : APHYRIC TO HYALOPILITIC, FROM 52 TO 54CM IS THE UPPE GLASSY MARGIN WHICH IS APHYRIC TO HYALOPILITIC, THE CORE OF THE UNIT IS APHANITIC TO INTERSERTAL WITH PLAG AND CPX MICROPHENOS; Structure : PILLOW BASALT WITH CRACKS OR VEINS FILLED WITH PYRITE+CHLORITE+CLAY AND ZEOLITE; Alteration : SLIGHTLY; Replacement: PYRITE CLAY MINERALS CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 620/1490 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 816.99 Core: 57 Top of Core Depth (m) : 815.50 Sect: 1 Top of Section Depth(m): 816.12 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 7 (62-68), 9 (91-100), 11 (119-126), 13 (144-149); Structure : PILLOW BASALT WITH CRACKS OR VEINS FILLED WITH PYRITE+CLAY+CHLORITE AND ZEOLITE; Alteration : SLIGHTLY; Comments : INNER PART OF PILLOW LAVA; Replacement: PYRITE CLAY MINERALS CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 710/1400 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 816.90 Core: 57 Top of Core Depth (m) : 815.50 Sect: 1 Top of Section Depth(m): 816.21 LITHOLOGY: PLAG-CPX MICROPHYRIC BASALT; Piece No. : PCE 8 (71-90), 10 (104-116), 12 (128-140); Texture : MICROPHYRIC, ALMOST FINE-GRAINED TO SLIGHTLY MEDIUM- GRAINED, SMALL CRUSHED PARTICLES; Structure : PILLOW BASALT WITH CRACKS OR VEINS FILLED WITH PYRITE+CLAY+CHLORITE AND ZEOLITE; Alteration : SLIGHTLY; Phenocrysts: PLAGIOCLASE CLINOPYROXENE MICROPHENOS; Replacement: ZEOLITE CHLORITE CLAY MINERALS PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 40 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 824.54 Core: 58 Top of Core Depth (m) : 824.50 Sect: 1 Top of Section Depth(m): 824.50 LITHOLOGY: BASALT; Piece No. : PCE 1 (1-4); Structure : BASALT CAVITY FILLED WITH ZEOLITE (ANALCITE?); Alteration : SLIGHTLY; Replacement: ZEOLITE Size(mm): 1-2 AVERAGE 1-2MM LONG WITH A MAXIMUM OF 5MM, POSSIBLY ANALCITE; Leg : 61 Top/Bottom Interval(mm): 40/ 770 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 825.27 Core: 58 Top of Core Depth (m) : 824.50 Sect: 1 Top of Section Depth(m): 824.54 LITHOLOGY: BASALT; Piece No. : PCE 2 (6-18), 3A (20-30), 3B (30-47), 3C (47-62), 3D (62-77); Texture : SLIGHTLY MEDIUM-GRAINED (INTERSERTAL); Structure : BASALT WITH VEINS FILLED WITH CHLORITE+PYRITE+CLAY AND ZEOLITE; Alteration : SLIGHTLY; Replacement: ZEOLITE CHLORITE PYRITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 770/ 950 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 825.45 Core: 58 Top of Core Depth (m) : 824.50 Sect: 1 Top of Section Depth(m): 825.27 LITHOLOGY: PLAG-CPX MICROPHYRIC BASALT; Piece No. : PCE 3E (78-88), 4 (90-95); Texture : MICROPHYRIC, PCE 3E IS SLIGHTLY FINE-GRAINED AND HYALOPILITIC, PCE 4 IS FINE-GRAINED; Structure : BASALT WITH VEINS FILLED WITH CHLORITE+PYRITE+CLAY AND ZEOLITE; Alteration : SLIGHTLY; Phenocrysts: PLAGIOCLASE CLINOPYROXENE MICROPHENOS; Replacement: CLAY MINERALS CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 950/1060 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 825.56 Core: 58 Top of Core Depth (m) : 824.50 Sect: 1 Top of Section Depth(m): 825.45 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 5 (99-106); Texture : APHYRIC, FINE-GRAINED WITH GLASSY MARGIN(2CM THICK); Structure : ZEOLITE VEIN NOTED; Alteration : SLIGHTLY SPOT OF ZEOLITE NOTED; SLIGHTLY; Replacement: ZEOLITE Leg : 61 Top/Bottom Interval(mm): 1060/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 826.00 Core: 58 Top of Core Depth (m) : 824.50 Sect: 1 Top of Section Depth(m): 825.56 LITHOLOGY: BASALT; Piece No. : PCE 6 (109-115), 7 (117-122), 8 (125-132), 9 (135-140), 10 (145-150); Texture : PCES 6-10 EXCLUDING 7 ARE SMALL CRUSHED FINE-GRAINED PARTICLES WITH GLASSY MARGINS (1-2CM THICK); Structure : BASALT WITH VEINS OF CHLORITE+PYRITE+CLAY AND ZEOLITE, PCE 7 HAS A ZEOLITE AND FE.OXIDE VEIN; Alteration : SLIGHTLY; Comments : DIFFERENT UNIT THAN ABOVE; Replacement: ZEOLITE PYRITE CHLORITE CLAY MINERALS FERROUS OXIDE Leg : 61 Top/Bottom Interval(mm): 0/ 200 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 826.20 Core: 58 Top of Core Depth (m) : 824.50 Sect: 2 Top of Section Depth(m): 826.00 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 1 (1-8), 2 (10-20); Texture : APHYRIC, FINE-GRAINED, ANHEDRAL; Structure : VEINS FILLED WITH ZEOLITE AND CHLORITE; Alteration : SLIGHTLY; Comments : SAME UNIT AS LOWER UNIT OF SECTION 58-1; Groundmass : CLINOPYROXENE ANHEDRAL CRYSTALS; Replacement: ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 200/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 827.50 Core: 58 Top of Core Depth (m) : 824.50 Sect: 2 Top of Section Depth(m): 826.20 LITHOLOGY: CPX-PLAG MICROPHYRIC BASALT; Piece No. : PCE 3A (22-36), 3B (30-51), 4A (52-60), 4B (60-70), 4C (70-80), 4D (80-86), 5 (92-110), 6 (111-118), 7A (120-130), 7B (130-140), 7C (140-150); Texture : MICROPHYRIC, FINE TO SLIGHTLY MEDIUM-GRAINED (HYALOPILITIC TO INTERSERTAL); Structure : VEINS FILLED WITH ZEOLITE AND CHLORITE-PARTICULARLY DEVELOPING IN PCES 3B+5+7A+7B; Alteration : SLIGHTLY; Comments : SAME UNIT AS LOWER UNIT OF SECTION 58-1; Phenocrysts: CLINOPYROXENE PLAGIOCLASE MICROPHENOS; Groundmass : CLINOPYROXENE PLAGIOCLASE MAGNETITE PLUS GLASS, ALL MICROLITES; Replacement: ZEOLITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/ 420 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 827.92 Core: 58 Top of Core Depth (m) : 824.50 Sect: 3 Top of Section Depth(m): 827.50 LITHOLOGY: CPX MICROPHYRIC BASALT; Piece No. : PCE 1 (1-10), 2A (15-21), 2B (22-42); Texture : MICROPHYRIC, INTERVAL (1-35) IS SLIGHTLY FINE- GRAINED, INTERVAL (35-42) IS SLIGHTLY MEDIUM TO MEDIUM-GRAINED, APHANITIC; Structure : VEINS FILLED WITH ZEOLITE+CHLORITE+PYRITE; Alteration : FRESH; Phenocrysts: CLINOPYROXENE AMOUNT AND SIZE OF CPX MICROPHENOS IS INTERVAL (35-42) ARE LARGER THAN UPPER PART; Replacement: ZEOLITE PYRITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 420/1430 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 828.93 Core: 58 Top of Core Depth (m) : 824.50 Sect: 3 Top of Section Depth(m): 827.92 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 3 (45-80), 4A (82-92), 4B (91-109), 4C (110-120), 4D (120-130), 4E (130-143); Texture : APHYRIC, TOP OF PCE 3 IS FINE-GRAINED, IN PCES 3-4E GRADUALLY INCREASING GRAIN SIZE FROM FINE TO SLIGHTLY FINE, APHANITIC, IN INTERVAL (42-60) CPX MICROPHENOS; Structure : VEINS ARE FILLED WITH ZEOLITE+PYRITE+CHLORITE; Alteration : SLIGHTLY; Replacement: ZEOLITE PYRITE CHLORITE Phenocrysts: CLINOPYROXENE CPX PHENOS IN INTERVAL (42-60); Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 830.50 Core: 58 Top of Core Depth (m) : 824.50 Sect: 4 Top of Section Depth(m): 829.00 LITHOLOGY: CPX MOD PHYRIC BASALT; Piece No. : PCE 1A (1-29), 1B (30-37), 2A (41-55), 2B (54-65), 3 (67-77), 4 (80-83), 7 (106-125), 8A (128-138), 8B (140-150); Texture : MOD PHYRIC, FINE-GRAINED, APHANITIC; Structure : VEINS ARE FILLED WITH ZEOLITE+CHLORITE+PYRITE; Alteration : FRESH TO SLIGHTLY; Phenocrysts: CLINOPYROXENE Replacement: PYRITE CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 830.50 Core: 58 Top of Core Depth (m) : 824.50 Sect: 4 Top of Section Depth(m): 829.00 LITHOLOGY: CPX SLIGHTLY MICROPHYRIC BASALT; Piece No. : PCE 5 (86-94), 6 (95-104); Texture : SLIGHTLY MICROPHYRIC, FINE-GRAINED; Structure : VEINS ARE FILLED WITH ZEOLITE+CHLORITE+PYRITE; Alteration : FRESH TO SLIGHTLY; Phenocrysts: CLINOPYROXENE (NOS; %) Replacement: CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 630 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 831.13 Core: 58 Top of Core Depth (m) : 824.50 Sect: 5 Top of Section Depth(m): 830.50 LITHOLOGY: CPX SLIGHTLY PHYRIC BASALT; Piece No. : PCE 1 (1-6), 2 (10-20), 3 (22-34), 4A (36-45), 4B (45-50) 5 (54-61); Texture : SLIGHTLY PHYRIC, FINE-GRAINED, APHANITIC; Structure : VEINS ARE FILLED WITH ZEOLITE+CHLORITE+PYRITE; Alteration : FRESH; Phenocrysts: CLINOPYROXENE Replacement: PYRITE CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 834.95 Core: 59 Top of Core Depth (m) : 833.50 Sect: 1 Top of Section Depth(m): 833.50 LITHOLOGY: CPX SLIGHTLY PHYRIC BASALT; Piece No. : PCE 1 (1-81), 2 (84-136); Texture : SLIGHTLY PHYRIC, PHENOS IN A MATRIX OF DIABASIC TO FINE-GRAINED EQUIGRANULAR TEXTURED BASALT, GRAIN SIZE IS SLIGHTLY COARSER THAN THE FINE-GRAINED BASALT IN THE LOWER PORTION OF THE SECTION, CLAY PATCHES OCCUR IN THE COARSE-GRAINED PORTIONS; Structure : BASALT SILL, VEINS ARE FILLED WITH CLAY+ZEOLITE+ PYRITE; Alteration : SLIGHTLY CLAY PATCHES IN COARSE-GRAINED PORTIONS; Comments : A PORTION OF ONE COOLING UNIT (INTRUSIVE) IS REPRESENTED IN THIS SECTION; Phenocrysts: CLINOPYROXENE ( 1-2%) Size(mm): <=1 Groundmass : PLAGIOCLASE AUGITE OPAQUE MINERALS COMPOSTION OF COARSE-GRAINED GNDMASS PLUS ALTERATION PRODUCTS; Replacement: CLAY MINERALS ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1250 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 836.25 Core: 59 Top of Core Depth (m) : 833.50 Sect: 2 Top of Section Depth(m): 835.00 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; SAME MINERALOGY AND TEXURE AND ALTERATION AS COARSE PORTION OF THE LAST SECTION; Piece No. : PCE 1 (0-119); Texture : SPARSELY PHYRIC, FINE-GRAINED, GRAIN SIZE DECREASES SLIGHTLY DOWNWARD; Structure : DOLERITE SILL; Alteration : SLIGHTLY; Comments : THE TOP OF A SECOND UNIT (INTRUSIVE) IS REPRESENTED IN THIS SECTION; Phenocrysts: CLINOPYROXENE ( 1-2%) Size(mm): <=1 Groundmass : PLAGIOCLASE AUGITE OPAQUE MINERALS COMPOSTION OF COARSE-GRAINED GNDMASS PLUS ALTERATION PRODUCTS; Replacement: CLAY MINERALS ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1330 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 837.83 Core: 59 Top of Core Depth (m) : 833.50 Sect: 3 Top of Section Depth(m): 836.50 LITHOLOGY: DOLERITE; EXACTLY LIKE THAT OF SECTION 2 IN EVERY RESPECT; Piece No. : PCE 1 (1-117), 2 (120-133); Texture : MEDIUM TO COARSE-GRAINED; Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 839.49 Core: 59 Top of Core Depth (m) : 833.50 Sect: 4 Top of Section Depth(m): 838.00 LITHOLOGY: DOLERITE; SAME AS SECTIONS 3 AND 2; Piece No. : PCE 1 (0-75), 2 (77-90), 3 (94-149); Texture : MEDIUM TO COARSE-GRAINED DOLERITE, MAFIC PHENOS IN A FINE-GRAINED MATRIX; Alteration : SLIGHTLY; Comments : SAME UNIT AS IN SECTIONS 59-2 AND 59-3; Phenocrysts: ( 1-2%) Size(mm): 0.2-0.5 MAFIC PHENOS; Leg : 61 Top/Bottom Interval(mm): 0/ 140 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 839.64 Core: 59 Top of Core Depth (m) : 833.50 Sect: 5 Top of Section Depth(m): 839.50 LITHOLOGY: DOLERITE SILL; CONTINUED FROM SECTION 59-4; Structure : SILL; Comments : UNIT 2; Leg : 61 Top/Bottom Interval(mm): 140/1400 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 840.90 Core: 59 Top of Core Depth (m) : 833.50 Sect: 5 Top of Section Depth(m): 839.64 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; PILLOW BASALT; Piece No. : PCE 1 (14-38), 2 (40-47), 3 (50-57), 4 (60-66), 5 (70-85), 6 (88-92), 7 (93-112), 8 (115-138); Texture : SPARSELY PHYRIC, FINE-GRAINED, GLASSY MARGINS OCCUR AT 15CM+89CM+113-115CM, THE INTERIOR BASALT IS MADE OF A FEW PHENOS OF CPX IN A GLASSY TO VARIOLITIC AND EQUIGRANULAR MATRIX OF APHANITIC DARK AND LIGHT GRAY BASALT, SOME COARSER GRAINED FRAGMENTS HAVE SPOTTED TEXTURES; Structure : FOUR PILLOW BASALT UNITS, VEINS FILLED WITH PYRITE AND GREEN CLAY; Comments : FOUR BASALT UNITS (14-59)+(59-85)+(85-113)+ (113-140); Phenocrysts: CLINOPYROXENE ( 1%) Size(mm): <0.5 INTERIOR OF BASALT; Replacement: ZEOLITE PYRITE CLAY MINERALS GREEN CLAY; Leg : 61 Top/Bottom Interval(mm): 0/ 500 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 841.50 Core: 59 Top of Core Depth (m) : 833.50 Sect: 6 Top of Section Depth(m): 841.00 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; PILLOW BASALT; SAME AS BOTTOM OF SECTION 5; Piece No. : PCE 1 (0-50) (TOP); Texture : SPARSELY PHYRIC; Structure : PILLOW BASALT; Phenocrysts: CLINOPYROXENE ( 1%) Size(mm): <0.5 Leg : 61 Top/Bottom Interval(mm): 500/1470 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 842.47 Core: 59 Top of Core Depth (m) : 833.50 Sect: 6 Top of Section Depth(m): 841.50 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 1 (50-57) (BOTTOM), 2 (63-70), 3 (71-74), 4 (76-80), 5 (82-95), 6 (96-102), 7 (104-125), 8 (127-147); Texture : GLASSY MARGINS OCCUR AT 74CM+90CM+95CM+125CM; Structure : FOUR PILLOW BASALT UNITS; Comments : FOUR BASALT UNITS (50-74)+(74-90)+(90-125)+ (125-150); Leg : 61 Top/Bottom Interval(mm): 0/ 640 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 843.14 Core: 59 Top of Core Depth (m) : 833.50 Sect: 7 Top of Section Depth(m): 842.50 LITHOLOGY: PILLOW BASALT; SAME AS PREVIOUS SECTION; Piece No. : PCE 1 (0-11), 2 (13-50), 3 (54-61); Texture : FINE-GRAINED, A THIN GLASSY MARGIN (1-2CM) OCCURS AT THE TOP OF THE SECTION; Structure : PILLOW BASALT, VEINS FILLED WITH PYRITE+ZEOLITE+ CLAY; Comments : THESE FRAGMENTS (PCES 1+2) WERE IN THE CORE CATCHER AND THEIR STRATIGRAPHIC ORIENTATION IS UNKNOWN; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 843.98 Core: 60 Top of Core Depth (m) : 842.50 Sect: 1 Top of Section Depth(m): 842.50 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; PILLOW BASALT; Piece No. : PCE 1 (0-4), 2 (5-22), 3 (26-30), 4 (34-39), 5 (41-47), 6 (50-62), 7 (65-75), 8 (77-82), 9 (85-135), 10 (137-148); Texture : SPARSELY PHYRIC, GLASSY MARGINS 1-2CM THICK OCCUR FROM (0-40)+(40-74)+(74-113)+(113-150), UNITS RANGE IN TEXTURE FROM GLASSY TO EQUIGRANULAR, INTERVALS (0-4) AND (85-104) ARE COARSE-GRAINED; Structure : PILLOW BASALT, VEINS ARE FILLED WITH PYRITE+CLAY+ PHILLIPSITE AND ARE MORE ABUNDANT THAN IN PREVIOUS CORES; Alteration : SPOTS OF PYRITE+CLAY+PHILLIPSITE ARE MORE ABUNDANT THAN PREVIOUS CORES; Comments : SEVERAL PILLOW UNITS; Phenocrysts: CLINOPYROXENE ( 1%) Size(mm): 0.2-0.4 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS THE COARSER FRAGMENTS HAVE HOLOXTALLINE GNDMASS OF PLAG+CPX+OP.MINS+ALTERATION PRODUCTS; Replacement: PYRITE CLAY MINERALS PHILLIPSITE Leg : 61 Top/Bottom Interval(mm): 0/1310 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 845.31 Core: 60 Top of Core Depth (m) : 842.50 Sect: 2 Top of Section Depth(m): 844.00 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; PILLOW BASALT; IDENTICAL IN ALL RESPECTS TO SECTION 1; Piece No. : PCE 1 (1-15), 2 (19-51), 3 (54-61), 4 (64-102), 5 (106-115), 6 (119-129); Texture : SPARSELY PHYRIC; Structure : PILLOW BASALT; Alteration : CONCENTRATION OF PHIL OCCURS AT 71CM; Comments : FOUR UNITS OF PILLOW BASALTS; Phenocrysts: CLINOPYROXENE ( 1%) Size(mm): 0.2-0.4 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS THE COARSER FRAGMENTS HAVE HOLOXTALLINE GNDMASS OF PLAG+CPX+OP.MINS+ALTERATION PRODUCTS; Replacement: PYRITE CLAY MINERALS PHILLIPSITE IN VEINS; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 847.00 Core: 60 Top of Core Depth (m) : 842.50 Sect: 3 Top of Section Depth(m): 845.50 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; PILLOW BASALT; IDENTICAL IN ALL RESPECTS TO THE PREVIOUS SECTION; Piece No. : PCE 1 (1-40), 2 (40-51), 3 (57-60), 4 (64-106), 5 (108-135), 6 (136-149); Texture : SPARSELY PHYRIC, SLIGHTLY COARSER GRAINED REGION AT INTERVAL (30-60); Structure : PILLOW BASALT; Comments : TWO UNITS OF PILLOW BASALTS; Phenocrysts: CLINOPYROXENE ( 1%) Size(mm): 0.2-0.4 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS THE COARSER FRAGMENTS HAVE HOLOXTALLINE GNDMASS OF PLAG+CPX+OP.MINS+ALTERATION PRODUCTS; Replacement: PYRITE CLAY MINERALS PHILLIPSITE IN VEINS; Leg : 61 Top/Bottom Interval(mm): 0/ 900 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 847.90 Core: 60 Top of Core Depth (m) : 842.50 Sect: 4 Top of Section Depth(m): 847.00 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; Piece No. : PCE 1 (0-20), 2 (21-89); Texture : SPARSELY PHYRIC, APHANITIC GNDMASS, MOST OF THE FRAGMENTS (20-90) ARE COARSER BASALTS WITH A HOLOXTALLINE GNDMASS; Comments : FROM 29 TO 90CM ARE FRAGMENTS FROM THE CORE CATCHER AND THEIR ORIENTATION AND STRATIGRAPHIC POSITION ARE UNKNOWN; Phenocrysts: CLINOPYROXENE ( 1%) Size(mm): 0.2-0.4 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS THE COARSER FRAGMENTS HAVE HOLOXTALLINE GNDMASS OF PLAG+CPX+OP.MINS+ALTERATION PRODUCTS; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 853.00 Core: 61 Top of Core Depth (m) : 851.50 Sect: 1 Top of Section Depth(m): 851.50 LITHOLOGY: PILLOW-LIKE BASALT; Piece No. : PCE 1 (0-5), 2 (8-17), 3 (20-29), 4 (30-35), 5 (37-44), 6A (46-55), 6B (55-61), 6C (62-66), 6D (66-84), 7A (87-105), 7B (103-117), 7C (117-124), 8A (125-140), 8B (140-149); Texture : IN PCES 1+2 DECREASING GRAIN SIZE DOWNWARD FROM SLIGHTY MEDIUM TO GLASSY LOWER MARGIN AND APHANITIC WITH SPARSE SPOTS OF CPX MICROPHENOS, PCES 3+4 HAVE GLASSY UPPER MARGINS AND PCE 6C HAS A GLASSY LOWER MARGIN, PCES 3-6C ARE FINE-GRAINED, IN PCES 6D-8B INCREASING GRAIN SIZE DOWNWARD AND PCE 6D HAS A GLASSY UPPER MARGIN AND IS FINE-GRAINED, PCES 7A-8B ARE SLIGHTLY MEDIUM TO MEDIUM-GRAINED AND INTERSERTAL TEXTURE; Structure : PILLOW-LIKE BASALT, VEINS ARE FILLED WITH ZEOLITE (PHIL) AND PYRITE; Alteration : SLIGHTLY; Replacement: ZEOLITE PHIL; PYRITE Phenocrysts: CLINOPYROXENE MICROPHENOS, SPARSE IN PCES 1+2; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 854.50 Core: 61 Top of Core Depth (m) : 851.50 Sect: 2 Top of Section Depth(m): 853.00 LITHOLOGY: PILLOW-LIKE BASALT; SAME AS SECTION 61-1; Piece No. : PCE 1A (0-17), 1B (19-30), 2A (34-36), 2B (36-58), 3 (60-80), 4 (85-91), 5 (95-100), 6 (100-110), 7 (115-120), 8A (124-129), 8B (129-132), 8C (135-135), 8D (136-140), 9 (143-150); Texture : PCES 1A-2B ARE MEDIUM-GRAINED, PCES 3-5 ARE SLIGHTLY MEDIUM TO SLIGHTLY FINE-GRAINED, PCES 6+7 ARE FINE- GRAINED AND WITHOUT A GLASSY LOWER MARGIN, PCES 8A- 8D ARE FINE-GRAINED AND WITHOUT GLASSY UPPER MARGIN ON BOTH SIDES; Structure : PILLOW-LIKE BASALT, VEINS ARE FILLED WITH ZEOLITE+ CHLORITE+PYRITE; Alteration : SLIGHTLY; Comments : THE UNIT IS CONTINUED FROM SECTION 61-1; Replacement: ZEOLITE CHLORITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 700 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 855.20 Core: 61 Top of Core Depth (m) : 851.50 Sect: 3 Top of Section Depth(m): 854.50 LITHOLOGY: CPX-OL MICROPHYRIC BASALT; Piece No. : PCE 1A (0-10), 1B (10-15), 1C (15-20), 2 (22-33), 3 (35-50), 4 (55-66); Texture : MICROPHYRIC, TOP OF PCE 1A IS AN UPPER GLASSY MARGIN (2-3CM) AND THE LOWER PORTION IS MICROPHYRIC, PCES 1B+1C ARE SLIGHTLY FINE-GRAINED, PCES 2-4 ARE SLIGHTLY MEDIUM TO MEDIUM-GRAINED; Structure : VEINS ARE FILLED WITH CHLORITE+PYRITE+ZEOLITE; Alteration : FRESH; Comments : THIS SECTION IS THE SAME UNIT AS IN SECTION 61-2; Phenocrysts: CLINOPYROXENE MICROPHENOS; OLIVINE MICROPHENOS; Replacement: PYRITE ZEOLITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 700/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 856.00 Core: 61 Top of Core Depth (m) : 851.50 Sect: 3 Top of Section Depth(m): 855.20 LITHOLOGY: PLAG-CPX BASALT; Piece No. : PCE 5A (75-100), 5B (100-110), 5C (110-138), 5B (138-147); Texture : MEDIUM-GRAINED, EQUIGRANULAR; Structure : IN PCE 5A MANY CHLORITE+PYRITE+ZEOLITE VEINS; Alteration : SLIGHTLY PCE 5A; FRESH PCE 5B; Comments : THIS SECTION IS THE SAME UNIT AS IN SECTION 61-2; Groundmass : CLINOPYROXENE PLAGIOCLASE Replacement: CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1000 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 857.00 Core: 61 Top of Core Depth (m) : 851.50 Sect: 4 Top of Section Depth(m): 856.00 LITHOLOGY: PLAG-CPX BASALT; SINGLE BASALT UNIT CONTINUED FROM PREVIOUS SECTION; Piece No. : PCE 1A (0-25), 1B (26-52), 1C (50-70), 1D (65-84), 1E (83-100); Texture : PCES 1A-1C ARE MEDIUM-GRAINED (EQUIGRANULAR), IN PCES 1D+1E DECREASING GRAIN SIZE DOWNWARD FROM MEDIUM TO FINE-GRAINED, AT THE BOTTOM OF PCE 1E IS A CHILLED MARGIN AND IS FINE-GRAINED; Structure : VEINS ARE FILLED WITH CHLORITE+PYRITE+ZEOLITE; Alteration : FRESH PCES 1A+1C-1E AND INTERVAL (45-52) OF PCE 1B ARE FRESH; Comments : ONE OF TWO BASALT UNITS IN THIS SECTION; Groundmass : CLINOPYROXENE PLAGIOCLASE Replacement: CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 1000/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 857.50 Core: 61 Top of Core Depth (m) : 851.50 Sect: 4 Top of Section Depth(m): 857.00 LITHOLOGY: CPX SPARSELY MICROPHYRIC BASALT; Piece No. : PCE 2 (103-120), 3 (123-150); Texture : PCE 2 IS A CHILLED MARGIN AND IS FINE-GRAINED, IN PCE 3 INCREASING GRAIN SIZE DOWNWARDS FROM SLIGHTLY FINE-GRAINED TO SLIGHTLY MEDIUM-GRAINED WITH SPARSE SPOTS OF CPX MICROPHENOS; Structure : VEINS ARE FILLED WITH CHLORITE+PYRITE+ZEOLITE; Alteration : FRESH SLIGHTLY FRESH; Comments : SINGLE BASALT UNIT; Texture : SPARSELY MICROPHYRIC; Phenocrysts: CLINOPYROXENE MICROPHENOS; Replacement: CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 859.00 Core: 61 Top of Core Depth (m) : 851.50 Sect: 5 Top of Section Depth(m): 857.50 LITHOLOGY: CPX PHYRIC BASALT; Piece No. : PCE 1A (0-6), 1B (6-40), 1C (35-55), 1D (56-72), 1E (75-86), 2A (92-105), 2B (107-112), 3 (118-138), 4 (140-150); Texture : PHYRIC, SLIGHTLY MEDIUM-GRAINED; Structure : VEINS ARE FILLED WITH CHLORITE+ZEOLITE+PYRITE; HOMOGENEOUS; Alteration : SLIGHTLY; Comments : SAME UNIT AS PREVIOUS SECTION; Phenocrysts: CLINOPYROXENE Replacement: CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 300 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 859.30 Core: 61 Top of Core Depth (m) : 851.50 Sect: 6 Top of Section Depth(m): 859.00 LITHOLOGY: CPX PHYRIC BASALT; Piece No. : PCE 1 (0-14), 2 (18-28); Texture : PHYRIC, SLIGHTLY MEDIUM-GRAINED; Structure : HOMOGENEOUS, VEINS ARE FILLED WITH CHLORITE+ZEOLITE+ PYRITE; Alteration : SLIGHTLY; Comments : CONTINUED FROM PREVIOUS SECTION; Phenocrysts: CLINOPYROXENE Replacement: CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 861.90 Core: 62 Top of Core Depth (m) : 860.50 Sect: 1 Top of Section Depth(m): 860.50 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 1A (0-17), 1B (18-27), 2B (101-140); Texture : PCES 1A+1B ARE FINE-GRAINED, PCE 2B IS SLIGHTLY MEDIUM-GRAINED; Structure : PILLOW BASALT, VEINS ARE FILLED WITH CHLORITE+ ZEOLITE(PHIL)+PYRITE; Alteration : SLIGHTLY; Replacement: CHLORITE ZEOLITE PHIL; PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 861.90 Core: 62 Top of Core Depth (m) : 860.50 Sect: 1 Top of Section Depth(m): 860.50 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; Piece No. : PCE 1B (27-32), 1C (32-46), 1D (47-61), 1E (62-73), 1F (74-83); Texture : SPARSELY PHYRIC, PCES 1B-1F ARE SLIGHTLY FINE- GRAINED WITH SPARSE SPOTS OF CPX MICROPHENOS AND APHANITIC GNDMASS, PCE 2A IS SLIGHTLY MEDIUM- GRAINED AND EQUIGRANULAR WITH SPARSE SPOTS OF CPX PHENOS; Structure : VEINS ARE FILLED WITH CHLORITE+ZEOLITE(PHIL)+ PYRITE; Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE ( <1%) IN PCES 1B(27CM)-1F; CLINOPYROXENE ( 1-3%) CPX SPOTS IN PCE 2A; Replacement: CHLORITE ZEOLITE PHIL PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 863.48 Core: 62 Top of Core Depth (m) : 860.50 Sect: 2 Top of Section Depth(m): 862.00 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 1A (1-36), 1B (37-46), 2E (130-132); Texture : PCE 1A AND TOP OF PCE 1B (TO 46CM) IS SLIGHTLY MEDIUM-GRAINED AND EQUIGRANULAR, BOTTOM OF 2E IS FINE-GRAINED; Structure : VEINS ARE FILLED WITH CHLORITE+PYRITE+ZEOLITE; Comments : CONTINUED FROM PREVIOUS SECTION; Replacement: CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 863.48 Core: 62 Top of Core Depth (m) : 860.50 Sect: 2 Top of Section Depth(m): 862.00 LITHOLOGY: CPX MICROPHYRIC BASALT; PILLOW BASALT; Piece No. : PCE 1B (37-60), 1C (60-65), 2A (69-81), 2B (83-90), 2C (92-109), 2D (110-125), 2E (125-132), 2F (134-147); Texture : MICROPHYRIC, BOTTOM OF PCE 1B (FROM 46CM) TO TOP OF PCE 1C (TO 130) AND PCE 2A (FROM 73CM) TO PCE 2E (TO 130CM) AND PCE 2F (FROM 137CM) TO BOTTOM OF PCE 2F ARE SLIGHTLY MEDIUM-GRAINED AND EQUIGRANULAR; Structure : PILLOW BASALT, VEINS ARE FILLED WITH CHLORITE+ PYRITE+ZEOLITE; Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE MICROPHENOS; Replacement: PYRITE ZEOLITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 863.48 Core: 62 Top of Core Depth (m) : 860.50 Sect: 2 Top of Section Depth(m): 862.00 LITHOLOGY: APHYRIC BASALT; PILLOW BASALT; Piece No. : PCE 1C (60-65), 2A (69-81), 2F (134-147); Texture : APHYRIC, BOTTOM OF PCE 1C (FROM 62CM) AND TOP OF PCE 2A (TO 73CM) AND TOP OF PCE 2F ARE FINE- GRAINED; Structure : PILLOW BASALT, VEINS ARE FILLED WITH CHLORITE+ PYRITE+ZEOLITE; Alteration : SLIGHTLY; Replacement: PYRITE ZEOLITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 864.98 Core: 62 Top of Core Depth (m) : 860.50 Sect: 3 Top of Section Depth(m): 863.50 LITHOLOGY: CPX MICROPHYRIC BASALT; PILLOW BASALT; Piece No. : PCE 1 (1-11), 2 (16-24), 3 (25-36), 4 (40-44), 5A (46-5), 5B (55-69), 5C (69-73), 5D (74-78), 5E (78-92), 6 (93-110), 7A (113-115), 7B (116-121), 7C (122-131), 8 (134-150); Texture : MICROPHYRIC, PCES 1-3 ARE SLIGHTLY MEDIUM TO SLIGHTLY FINE-GRAINED, PCE 4 IS FINE-GRAINED, TOP OF PCE 5A IS A GLASSY CHILLED MARGIN, INTERVAL (100-110) OF PCE 6 IS FINE-GRAINED, PCE 7B HAS A LATERAL GLASSY CHILLED MARGIN, PCES 7C+8 ARE FINE- GRAINED; Structure : PILLOW BASALT, VEINS ARE FILLED WITH PYRITE+CHLORITE +ZEOLITE, ZEOLITE VEIN OR CAVITY NOTED AT BOUNDARY AT 47CM; Alteration : SLIGHTLY; Comments : CONTINUED FROM LOWER UNIT OF PREVIOUS SECTION; Phenocrysts: CLINOPYROXENE SPOTS OF CPX MICROPHENOS IN PCES 1-3, IN PCES 5A- 5C INCREASING GRAIN SIZE OF CPX MICROPHENOS, IN PCES 5D-6 (TO 100CM) DECREASING GRAIN SIZE OF CPX MICROPHENOS, IN PCES 7C+8 RARE SPOTS OF CPX MICROPHENOS; Replacement: CHLORITE PYRITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/ 380 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 865.38 Core: 62 Top of Core Depth (m) : 860.50 Sect: 4 Top of Section Depth(m): 865.00 LITHOLOGY: PILLOW BASALT; Piece No. : PCE 1 (0-35); Texture : FINE-GRAINED WITH RARE SPOTS OF CPX MICROPHENOS (<1MM), ONE RELATIVE LARGE PCE HAS A GLASSY MARGIN; Structure : PILLOW BASALT, SMALL CRUSHED PARTICLES; Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE Size(mm): <1 Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 866.00 Core: 63 Top of Core Depth (m) : 864.50 Sect: 1 Top of Section Depth(m): 864.50 LITHOLOGY: MICRODOLERITE; Piece No. : PCE 1 (0-6), 2 (10-25), 3 (25-34), 4A (38-45), 4B (45-61), 4C (61-90), 4D (90-115), 5A (117-130), 5B (131-150); Texture : GLASSY AND APHANITIC, MEDIUM-GRAINED IN MIDDLE OF UNIT INTERVAL, FROM 35 TO 38CM IS AN ASH-LIKE COARSE-GRAINED ROCK WITH COARSE CRYSTALS SURROUNDED BY ALTERED APHANITIC MATERIAL; Structure : PYRITE+CHLORITE+CLAY VEINS AND ZEOLITE VEINS ARE PRESENT, FROM 10 TO 24CM ARE THIN DENDRITIC VEINS OF FINE-GRAINED MORE XTALLINE MICRODOLERITES IN APHANITIC ONES; Comments : THREE UNITS-(0-25) AND (25-45) AND (45-150); Vesicles : VESICULAR NEAR CONTACTS OF UNITS; Groundmass : PLAGIOCLASE CLINOPYROXENE Replacement: PYRITE CHLORITE CLAY MINERALS ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1010 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 867.01 Core: 63 Top of Core Depth (m) : 864.50 Sect: 2 Top of Section Depth(m): 866.00 LITHOLOGY: MICRODOLERITE; SAME MICRODOLERITES AS ABOVE; Piece No. : PCE 1A (0-15), 1B (15-35), 2 (36-47), 3 (50-62), 4A (65-75), 4B (75-81), 4C (81-100); Structure : INTERVAL (65-80) THIN DENDRITIC VEINS OF FINE- GRAINED MICRODOLERITES IN APHANITIC (QUENCHED) ROCKS OF CHILLED MARGIN, PYRITE+CHLORITE+CLAY VEINS ARE PRESENT; Texture : CHILLED MARGIN; Replacement: CHLORITE PYRITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1420 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 870.92 Core: 64 Top of Core Depth (m) : 869.50 Sect: 1 Top of Section Depth(m): 869.50 LITHOLOGY: MASSIVE BASALT SILL; CPX SPARSELY MICROPHYRIC BASALT; Piece No. : PCE 1A (0-17), 1B (16-43), 1C (43-85), 1D (85-117), 1E (118-141); Texture : SLIGHTLY MEDIUM-GRAINED, EQUIGRANULAR WITH SPARSE SPOTS OF CPX MICROPHENOS (<1MM) IN APHANITIC GNDMASS, LOWER PART SLIGHTY LESS CPX MICROPHYRIC THAN UPPER PART; Structure : HOMOGENEOUS MASSIVE BASALT, IN PCE 1A SOME VEINS ARE FILLED WITH CHLORITE+ZEOLITE; Alteration : FRESH; Phenocrysts: CLINOPYROXENE Size(mm): <1 SPARSE SPOTS OF CPX MICROPHENOS, LOWER PART IS SLIGHTLY LESS MICROPHYRIC THAN UPPER PART; Replacement: CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1270 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 872.27 Core: 64 Top of Core Depth (m) : 869.50 Sect: 2 Top of Section Depth(m): 871.00 LITHOLOGY: MASSIVE BASALT SILL; PLAG-CPX SPARSELY MICROPHYRIC BASALT; Piece No. : PCE 1A (0-25), 1B (25-59), 1C (60-115), 1D (115-127); Texture : SLIGHTLY MEDIUM-GRAINED IN PCE 1A AND INCREASING TO MEDIUM TO SLIGHTLY COARSE-GRAINED IN PCE 1D, EQUIGRANULAR TO SUBOPHITIC; Structure : MASSIVE BASALT SILL, IN PCES 1B+1C+1D VEINS ARE FILLED WITH ZEOLITE+CHLORITE+PYRITE; SLIGHTLY; Comments : CONTINUED UNIT FROM PREVIOUS SECTION; Phenocrysts: CLINOPYROXENE PLAGIOCLASE MICROPHENOS; Groundmass : COMBINATION INCLUDES PLAG+CPX+MAGN MICROLITES; Replacement: ZEOLITE CHLORITE Minerals Replaced: CPX PYRITE CLAY MINERALS Minerals Replaced: CPX Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 873.90 Core: 64 Top of Core Depth (m) : 869.50 Sect: 3 Top of Section Depth(m): 872.50 LITHOLOGY: MASSIVE BASALT SILL; Piece No. : PCE 1A (0-40), 1B (40-59), 1C (60-69), 1D (70-79), 1E (79-84), 1F (84-100), 2 (104-130); Texture : PCES 1A+1B ARE SLIGHTLY COARSE-GRAINED WITH SPARSE SPOTS OF CPX PHENOS (1.0-1.5MM) AND ARE INTERGRANULAR TO SUBOPHITIC, IN PCES 1C-2 DECREASING GRAIN SIZE DOWNWARDS FROM SLIGHTLY COARSE TO MEDIUM- GRAINED, THE SIZE OF CPX PHENOS SPOTS ARE LESS THAN THAN OF THE UPPER SECTION (<1.0MM); Structure : IN PCES 1B-1D VEINS ARE PREVALENT, VEINS ARE FILLED BY CHLORITE+ZEOLITE+PYRITE, MASSIVE BASALT SILL; Alteration : SLIGHTLY; Comments : CONTINUED FROM PREVIOUS SECTION; Phenocrysts: CLINOPYROXENE Size(mm): 1.0-1.5 Replacement: CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 875.45 Core: 64 Top of Core Depth (m) : 869.50 Sect: 4 Top of Section Depth(m): 874.00 LITHOLOGY: MASSIVE BASALT SILL; Piece No. : PCE 1A (1-20), 1B (22-35), 2A (37-50), 2B (50-52), 3 (55-65), 4A (67-73), 4B (75-81), 5 (86-101), 6A (106-132), 6B (134-145); Texture : IN PCES 1A-1B DECREASING GRAIN SIZE DOWNWARDS FROM SLIGHTLY MEDIUM TO FINE-GRAINED AND HAVE SPARSE SPOTS OF CPX(<1MM), IN PCES 2A-6A(105CM) CPX MICROPHENOS ARE PRESENT AND GRAIN SIZE IS INCREASING DOWNWARD FROM SLIGHTLY FINE TO SLIGHTLY COARSE GRAINED, IN PCES 6A(105CM)-6B CPX MICROPHENOS ARE PRESENT AND DECREASING GRAIN SIZE FROM SLIGHTLY COARSE TO MEDIUM-GRAINED; Structure : MASSIVE BASALT SILL, VEINS ARE FILLED WITH PYRITE+ CHLORITE+ZEOLITE; Alteration : SLIGHTLY; Comments : TWO BASALT UNITS MAY OCCUR-(0-35) AND (35-150?), INTERVAL (0-35) IS CONTINUED FROM 64-3; Phenocrysts: CLINOPYROXENE Size(mm): <1 Replacement: ZEOLITE PYRITE CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 877.00 Core: 64 Top of Core Depth (m) : 869.50 Sect: 5 Top of Section Depth(m): 875.50 LITHOLOGY: MASSIVE BASALT; Piece No. : PCE 1A (0-10), 1B (10-22), 1C (22-32), 1D (32-40), 2 (43-53), 3 (56-65), 4A (68-81), 4B (84-90), 4C (91-96), 4D (96-102), 4E (102-106), 4F (106-110), 5 (112-130), 6 (130-149); Texture : PCES 1A-1D ARE DECREASING IN GRAIN SIZE FROM MEDIUM TO FINE-GRAINED, TOP OF PCE 2 AND BOTTOM OF PCE 4F ARE FINE-GRAINED, PCE 4B IS CORE OF THIS UNIT (43- 110) AND MEDIUM-GRAINED WITH SPARSE SPOTS OF CPX MICROPHENOS (<1MM), PCE 5 IS MADE OF MANY SMALL CRUSHED FINE-GRAINED PARTICLES, PCE 6 IS MEDIUM- GRAINED WITH CPX MICROPHENOS; Structure : MASSIVE BASALT, VEINS ARE FILLED WITH PYRITE+ CHLORITE+ZEOLITE; Alteration : SLIGHTLY; Comments : THREE BASALT UNITS EXIST-(0-40) AND (40-110) AND (110-150?); Phenocrysts: CLINOPYROXENE Size(mm): <1 IN PCES 4B AND 6; Replacement: PYRITE CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 877.95 Core: 65 Top of Core Depth (m) : 876.50 Sect: 1 Top of Section Depth(m): 876.50 LITHOLOGY: DIABASE; MASSIVE BASALT SILL; Piece No. : PCE 1 (1-20), 2 (22-47), 3 (50-66), 4 (70-74), 5 (76-142); Texture : MEDIUM-GRAINED DIABASE, SUBOPHITIC; Structure : MASSIVE AND HOMOGENEOUS BASALT SILL, VEINS ARE FILLED WITH CHLORITE (OR GREEN CLAY) AND PYRITE AND ZEOLITE; Alteration : SLIGHTLY A FEW CLAY REPLACEMENT PATCHES ARE FOUND, ALTERATION IS MAINLY OBVIOUS AS HEAVY VEINING; Comments : BELONGS TO A SINGLE COOLING UNIT; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): <0.7 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS ALTERATIONS ARE IN GNDMASS; Replacement: CHLORITE OR CLAY; PYRITE ZEOLITE Comments : NO LINER USED-ANY PCE MAY BE OUT OF STRATIGRAPHIC ORDER OR MAY BE INCORRECTLY ORIENTED; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 879.48 Core: 65 Top of Core Depth (m) : 876.50 Sect: 2 Top of Section Depth(m): 878.00 LITHOLOGY: DIABASE; MASSIVE BASALT SILL; SAME AS PREVIOUS SECTION IN ALL RESPECTS; Piece No. : PCE 1 (1-148); Texture : MEDIUM-GRAINED DIABASE, SUBOPHITIC; Structure : MASSIVE AND HOMOGENEOUS BASALT SILL, VEINS ARE FILLED WITH CHLORITE (OR GREEN CLAY) AND PYRITE AND ZEOLITE; Alteration : SLIGHTLY A FEW CLAY REPLACEMENT PATCHES ARE FOUND, ALTERATION IS MAINLY OBVIOUS AS HEAVY VEINING; Comments : BELONGS TO A SINGLE COOLING UNIT; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): <0.2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS ALTERATIONS ARE IN GNDMASS; Replacement: CHLORITE OR CLAY; PYRITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1310 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 880.81 Core: 65 Top of Core Depth (m) : 876.50 Sect: 3 Top of Section Depth(m): 879.50 LITHOLOGY: DIABASE; MASSIVE BASALT SILL; SAME AS PREVIOUS SECTION IN ALL RESPECTS EXCEPT FOR INCREASED ABUNDANCE OF VEINS; Piece No. : PCE 1 (0-22), 2 (25-59), 3 (60-127); Structure : MASSIVE BASALT SILL, HEAVY VEINING WITH LIGHT GREEN CLAY AND PYRITE-VEINS UP TO 3MM THICK; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): <0.2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERALS ALTERATIONS ARE IN GNDMASS; Replacement: CHLORITE OR CLAY; PYRITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 884.45 Core: 66 Top of Core Depth (m) : 883.00 Sect: 1 Top of Section Depth(m): 883.00 LITHOLOGY: MASSIVE DOLERITE SILL; SAME PETROLOGY AND MINERALOGY AND VEINS AS 65-3; Piece No. : PCE 1A (0-20), 1B (20-40), 1C (40-45), 1D (45-60), 1E (60-80), 1F (80-148); Structure : MASSIVE DOLERITE SILL; Alteration : SLIGHTLY; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 885.98 Core: 66 Top of Core Depth (m) : 883.00 Sect: 2 Top of Section Depth(m): 884.50 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS ABOVE; Piece No. : PCE 1A (0-20), 1B (20-27), 1C (25-60), 1D (60-75), 1E (75-92), 1F (92-111), 1G (111-125), 1H (124-148); Texture : DOLERITE, MEDIUM-GRAINED SUBOPHITIC; Structure : MASSIVE DOLERITE SILL WITH CHLORITE+PYRITE+CLAY VEINS; Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): .2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 887.50 Core: 66 Top of Core Depth (m) : 883.00 Sect: 3 Top of Section Depth(m): 886.00 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS ABOVE; Piece No. : PCE 1A (0-15), 1B (15-40), 1C (40-70), 1D (70-90), 1E (88-106), 1F (104-150); Texture : MEDIUM-GRAINED SUBOPHITIC DOLERITE; Structure : MASSIVE DOLERITE SILL WITH CHLORITE+PYRITE+CLAY VEINS; Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): .2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL Leg : 61 Top/Bottom Interval(mm): 0/1360 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 888.86 Core: 66 Top of Core Depth (m) : 883.00 Sect: 4 Top of Section Depth(m): 887.50 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS ABOVE EXCEPT INTERVAL (110-130) IS MORE FINE GRAINED; Piece No. : PCE 1A (0-15), 1B (16-35), 1C (35-61), 1D (61-85), 1E (85-106), 1F (107-131); Texture : SAME EXCEPT INTERVAL (110-130) IS SLIGHTLY MORE FINE GRAINED MICRODOLERITE; Structure : MASSIVE DOLERITE SILL WITH CHLORITE+PYRITE+CLAY VEINS; Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): .2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL Replacement: CHLORITE PYRITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1340 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 890.34 Core: 66 Top of Core Depth (m) : 883.00 Sect: 5 Top of Section Depth(m): 889.00 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS INTERVAL (110-130) OF SECTION 66-4; Piece No. : PCE 1A (0-25), 1B (25-50), 1C (50-68), 1D (69-85), 1E (85-130); Texture : SAME AS ABOVE, MICRODOLERITIC; Structure : MASSIVE DOLERITE SILL WITH CHLORITE+PYRITE+CLAY VEINS; Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): .2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL Replacement: CHLORITE PYRITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 892.00 Core: 66 Top of Core Depth (m) : 883.00 Sect: 6 Top of Section Depth(m): 890.50 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS SECTION 66-5; Piece No. : PCE 1A (0-25), 1B (25-50), 1C (50-60), 1D (60-76), 1E (76-87), 1F (87-100), 1G (101-110), 1H (110-124), 1I (125-150); Texture : SUBOPHITIC MICRODOLERITE, MEDIUM-GRAINED AS INTERVAL (110-130) OF SECTION 66-4; Structure : MASSIVE DOLERITE SILL WITH CHLORITE+PYRITE+CLAY VEINS; Alteration : SLIGHTLY; Comments : SAME UNIT AS 65-1; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): .2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL Replacement: CHLORITE PYRITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/ 370 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 892.37 Core: 66 Top of Core Depth (m) : 883.00 Sect: 7 Top of Section Depth(m): 892.00 LITHOLOGY: MASSIVE DOLERITE SILL; SAME AS ABOVE; Piece No. : PCE 1A (0-12), 1B (14-37); Texture : SUBOPHITIC MICRODOLERITE, MEDIUM-GRAINED AS IN INTERVAL (110-130) OF SECTION 66-4; Structure : MASSIVE DOLERITE SILL, VEINING OCCURS; Alteration : SLIGHTLY ALTERATION OCCURS AS HEAVY VEINING; Comments : SAME UNIT AS 65-1; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): .2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL Replacement: CHLORITE PYRITE CLAY MINERALS Leg : 61 Top/Bottom Interval(mm): 0/1310 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 893.31 Core: 67 Top of Core Depth (m) : 892.00 Sect: 1 Top of Section Depth(m): 892.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-8), 1B (9-13), 1C (14-61), 1D (61-86), 1E (85-110), 1F (110-129); Texture : A FEW (<1%) PHENOS OF CPX IN A COARSE-GRAINED DIABASE MATRIX; Structure : MASSIVE DOLERITE SILL, A RATHER THICK SILL, VEINS CONSIST OF GREEN AND WHITE CLAY (NO PYRITE OR CALCITE OR ZEOLITE AS BEFORE); Alteration : SLIGHTLY ALTERATION CONSISTS OF CLAY PATCHES IN THE ROCK AS WELL AS VEINS; Comments : STILL PART OF THE SAME UNIT; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): .2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL ALTERATION PRODUCTS IN GNDMASS; Replacement: CLAY GREEN AND WHITE; Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 894.95 Core: 67 Top of Core Depth (m) : 892.00 Sect: 2 Top of Section Depth(m): 893.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-40), 1B (40-91), 1C (91-114), 1D (110-145); Texture : A FEW (<1%) PHENOS OF CPX IN A COARSE-GRAINED DIABASE MATRIX; Structure : MASSIVE DOLERITE SILL, A RATHER THICK SILL, VEINS CONSIST OF GREEN AND WHITE CLAY (NO PYRITE OR CALCITE OR ZEOLITE AS BEFORE); Alteration : SLIGHTLY ALTERATION CONSISTS OF CLAY PATCHES IN THE ROCK AS WELL AS VEINS; Comments : STILL PART OF THE SAME UNIT AS SECTION 67-1; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): .2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL ALTERATION PRODUCTS IN GNDMASS; Replacement: CLAY GREEN AND WHITE; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 896.50 Core: 67 Top of Core Depth (m) : 892.00 Sect: 3 Top of Section Depth(m): 895.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-11), 1B (11-37), 1C (37-87), 1D (86-150); Texture : A FEW (<1%) PHENOS OF CPX IN A COARSE-GRAINED DIABASE MATRIX; Structure : MASSIVE DOLERITE SILL, A RATHER THICK SILL, VEINS CONSIST OF GREEN AND WHITE CLAY (NO PYRITE OR CALCITE OR ZEOLITE AS BEFORE); Alteration : SLIGHTLY ALTERATION CONSISTS OF CLAY PATCHES IN THE ROCK AS WELL AS VEINS; Comments : SAME UNIT AS SECTION 67-1; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): .2 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL ALTERATION PRODUCTS IN GNDMASS; Replacement: CLAY GREEN AND WHITE; Leg : 61 Top/Bottom Interval(mm): 0/1460 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 897.96 Core: 67 Top of Core Depth (m) : 892.00 Sect: 4 Top of Section Depth(m): 896.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-23), 1B (25-36), 1C (36-68), 1D (65-117), 1E (117-122), 1F (120-145); Texture : A FEW (<1%) PHENOS OF CPX IN A COARSE-GRAINED DIABASE MATRIX; Structure : MASSIVE DOLERITE SILL, A RATHER THICK SILL, VEINS CONSIST OF GREEN AND WHITE CLAY (NO PYRITE OR CALCITE OR ZEOLITE AS BEFORE); Alteration : SLIGHTLY ALTERATION CONSISTS OF CLAY PATCHES IN THE ROCK AS WELL AS VEINS; Comments : SAME UNIT AS SECTION 67-1; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): 0.2-0.6 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL ALTERATION PRODUCTS IN GNDMASS; Replacement: CLAY GREEN AND WHITE; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 899.48 Core: 67 Top of Core Depth (m) : 892.00 Sect: 5 Top of Section Depth(m): 898.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-44), 1B (44-62), 1C (62-81), 1D (81-110), 1E (110-120), 1F (121-148); Texture : A FEW (<1%) PHENOS OF CPX IN A COARSE-GRAINED DIABASE MATRIX; Structure : MASSIVE DOLERITE SILL, A RATHER THICK SILL, VEINS CONSIST OF GREEN AND WHITE CLAY (NO PYRITE OR CALCITE OR ZEOLITE AS BEFORE); Alteration : SLIGHTLY ALTERATION CONSISTS OF CLAY PATCHES IN THE ROCK AS WELL AS VEINS; Comments : SAME UNIT AS SECTION 67-1; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): 0.2-0.6 Groundmass : PLAGIOCLASE CLINOPYROXENE OPAQUE MINERAL ALTERATION PRODUCTS IN GNDMASS; Replacement: CLAY GREEN AND WHITE; Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 900.90 Core: 67 Top of Core Depth (m) : 892.00 Sect: 6 Top of Section Depth(m): 899.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-6), 1B (6-17), 1C (17-30), 1D (30-52), 1E (48-72), 1F (71-83), 1G (79-102), 1H (101-116), 1I (117-140); Texture : A FEW (<1%) PHENOS OF CPX IN A COARSE-GRAINED DOLERITE MATRIX; Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH GREEN AND WHITE CLAY; Alteration : SLIGHTLY ALTERATION CONSISTS OF CLAY PATCHES IN THE ROCK AND IN VEINS; Comments : SAME UNIT AS SECTION 67-1; Phenocrysts: CLINOPYROXENE ( <1%) Groundmass : PLAGIOCLASE CLINOPYROXENE MAGNETITE ALTERATION PRODUCTS ARE IN GNDMASS; Replacement: CLAY GREEN AND WHITE CLAY; Leg : 61 Top/Bottom Interval(mm): 0/ 800 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 901.80 Core: 67 Top of Core Depth (m) : 892.00 Sect: 7 Top of Section Depth(m): 901.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (1-23), 1B (24-44), 1C (44-52), 1D (52-70), 1E (70-78); Texture : A FEW (<1%) PHENOS OF CPX IN A COARSE-GRAINED DOLERITE MATRIX; Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH GREEN AND WHITE CLAY; Alteration : SLIGHTLY ALTERATION CONSISTS OF CLAY PATCHES IN THE ROCK AND IN VEINS; Comments : SAME UNIT AS SECTION 67-1; Phenocrysts: CLINOPYROXENE ( <1%) Groundmass : PLAGIOCLASE CLINOPYROXENE MAGNETITE ALTERATION PRODUCTS ARE IN GNDMASS; Replacement: CLAY GREEN AND WHITE CLAY; Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 902.40 Core: 68 Top of Core Depth (m) : 901.00 Sect: 1 Top of Section Depth(m): 901.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-10), 1B (11-35), 1C (35-59), 1D (60-90), 1E (90-125), 1F (125-140); Texture : SUBOPHITIC TO INTERGRANULAR MEDIUM TO SLIGHTLY COARSE-GRAINED; Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE; Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE Size(mm): <1 OFTEN FORMS AGGREGATES; PLAGIOCLASE Size(mm): <1 Groundmass : CLINOPYROXENE PLAGIOCLASE MAGNETITE MICROLITES; Replacement: CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1120 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 903.62 Core: 68 Top of Core Depth (m) : 901.00 Sect: 2 Top of Section Depth(m): 902.50 LITHOLOGY: MASSIVE DOLERITE SILL; CONTINUED FROM PREVIOUS SECTION; Piece No. : PCE 1A (0-59), 1B (59-69), 1C (70-82), 1D (82-110); Texture : IN PCES 1A-1D DECREASING GRAIN SIZE DOWNWARD FROM SLIGHTLY COARSE TO MEDIUM-GRAINED (INTERSERTAL TO SUBOPHITIC), IN PCE 1D GRAIN SIZE ABRUPTLY CHANGES TO FINE WITH SPARSE SPOTS OF CPX MICROPHENOS (1.0- 1.5MM) (HYALOPILITIC), THE BOTTOM OF PCE 1D IS FINE- GRAINED; Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED MAINLY BY CHLORITE; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 68-1; Phenocrysts: CLINOPYROXENE Size(mm): 1.0-1.5 SPARSE SPOTS OF CPX MICROPHENOS; Replacement: CHLORITE FILLING VEINS; Leg : 61 Top/Bottom Interval(mm): 1120/1360 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 903.86 Core: 68 Top of Core Depth (m) : 901.00 Sect: 2 Top of Section Depth(m): 903.62 LITHOLOGY: DOLERITE BRECCIA; Piece No. : PCE 2 (115-135); Texture : FINE-GRAINED BRECCIATED DOLERITE PARTICLES; Alteration : SLIGHTLY; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 905.50 Core: 68 Top of Core Depth (m) : 901.00 Sect: 3 Top of Section Depth(m): 904.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1 (1-10), 2A (15-25), 2B (25-35), 2C (35-41), 2D (43-50), 2E (50-65), 3 (68-75), 4 (77-105), 5 (108-126), 6 (130-150); Texture : PCE 1 IS SLIGHTLY FINE-GRAINED, PCE 2A IS MEDIUM- GRAINED, PCE 2B IS FINE-GRAINED BUT ALTERED, PCES 2C+2D ARE SLIGHTLY FINE-GRAINED, IN PCES 2E-4 GRAIN SIZE INCREASES FROM SLIGHTLY FINE-GRAINED TO MEDIUM- GRAINED, IN PCES 4-6 GRAIN SIZE DECREASES; Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED MAINLY BY CHLORITE (RARE PYRITE); Alteration : SLIGHTLY; Replacement: CHLORITE PYRITE RARE, IN VEINS; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 907.00 Core: 68 Top of Core Depth (m) : 901.00 Sect: 4 Top of Section Depth(m): 905.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1 (0-5), 2A (8-18), 2B (19-26), 3 (30-43), 4A (45-53), 4B (54-75), 5A (77-95), 5B (95-100), 6 (103-114), 7 (115-135), 8 (138-150); Texture : PCE 1 IS CONTINUED FROM PREVIOUS SECTION AND FINE- GRAINED WITH CPX MICROPHENOS (<1MM), PCES 2A-2B ARE FINE-GRAINED, IN PCES 3-8 GRAIN SIZE INCREASES DOWNWARD FROM SLIGHTLY MEDIUM-GRAINED TO SLIGHTLY COARSE-GRAINED; Structure : MASSIVE DOLERITE SILL WITH CHLORITE+PYRITE VEINS; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 68-3; Phenocrysts: CLINOPYROXENE Size(mm): <1 IN PCE 1; Replacement: CHLORITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1300 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 908.30 Core: 68 Top of Core Depth (m) : 901.00 Sect: 5 Top of Section Depth(m): 907.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1 (1-10), 2A (12-38), 2B (39-67), 3 (70-101), 4 (105-130); Texture : SLIGHTLY DECREASING GRAIN SIZE DOWNWARD FROM SLIGHTLY COARSE TO MEDIUM-GRAINED, THE MEDIUM- GRAINED PCE IS EQUIGRANULAR; Structure : MASSIVE DOLERITE SILL WITH CHLORITE VEINS; Alteration : SLIGHTLY; Comments : SAME UNIT AS PREVIOUS SECTION; Replacement: CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/ 450 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 908.95 Core: 68 Top of Core Depth (m) : 901.00 Sect: 6 Top of Section Depth(m): 908.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1 (0-13), 2 (15-25), 3 (25-29), 4 (30-43); Texture : PCE 1 IS MEDIUM-GRAINED, PCES 2+3 ARE SLIGHTLY FINE- GRAINED, PCE 4 IS SLIGHTLY FINE-GRAINED; Structure : MASSIVE DOLERITE SILL, PCE 4 CONSISTS OF SMALL CRUSHED PARTICLES, POSSIBLE SILL BOUNDARY AT 44CM; Alteration : SLIGHTLY; Leg : 61 Top/Bottom Interval(mm): 0/1310 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 911.31 Core: 69 Top of Core Depth (m) : 910.00 Sect: 1 Top of Section Depth(m): 910.00 LITHOLOGY: MICRODOLERITE SILLS; Piece No. : PCE 1A (0-5), 1B (5-8), 2 (11-20), 3A (24-35), 3B (37-50), 4A (52-65), 4B (65-72), 5A (74-76), 5B (77-82), 5C (82-87), 6 (71-106), 7 (109-115), 8 (119-130); Texture : FINE-GRAINED TO GLASSY NEAR CONTACTS, MEDIUM-GRAINED IN SILL INTERIOR; Structure : SILL, CHLORITE-CLAY VEINS; Alteration : EXT HEAVILY ALTERED NEAR VEINS; Comments : THREE UNITS, INTERVALS (0-9) AND (10-72) AND (74-130); Replacement: CHLORITE CLAY Leg : 61 Top/Bottom Interval(mm): 0/1250 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 912.75 Core: 69 Top of Core Depth (m) : 910.00 Sect: 2 Top of Section Depth(m): 911.50 LITHOLOGY: MICRODOLERITE SILLS; Piece No. : PCE 1 (0-10), 2A (14-20), 2B (20-25), 2C (25-30), 3 (35-38), 4 (40-50), 5 (52-65), 6A (69-75), 6B (75-82), 6C (81-91), 7 (92-125); Texture : IN INTERVAL (65-120) ARE SMALL PCES OF FINE-GRAINED MICRODOLERITES; Structure : INTERVAL (0-65) IS THE BOTTOM OF SILL FROM SECTION 69-1, CHLORITE+CLAY VEINS; Alteration : EXT; Replacement: CHLORITE CLAY Leg : 61 Top/Bottom Interval(mm): 0/ 970 Analyst: Shcheka, S.A. Hole: 462A Sample Midpoint (m) : 913.97 Core: 69 Top of Core Depth (m) : 910.00 Sect: 3 Top of Section Depth(m): 913.00 LITHOLOGY: MICRODOLERITE; SILL; Piece No. : PCE 1A (0-10), 2 (11-20), 3 (24-45), 4A (48-52), 4B (54-65), 4C (65-72), 4D (73-76), 5A (80-90), 5B (90-95); Texture : FINE-GRAINED TO APHANITIC AND GLASSY NEAR CONTACTS, MEDIUM-GRAINED IN SILL INTERIORS; Structure : SILL, VEINS FILLED WITH CHLORITE AND CLAY; Alteration : EXT; Comments : TWO UNITS-INTERVALS (0-22) AND (22-95); Replacement: CLAY CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/ 250 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 919.25 Core: 70 Top of Core Depth (m) : 919.00 Sect: 1 Top of Section Depth(m): 919.00 LITHOLOGY: HYALOCLASTITE AND HYALOCLASTITE BRECCIA; SEE SEDIMENT VISUAL DESCRIPTIONS (MAY BE CAVINGS); Piece No. : PCE 1 (0-25); Leg : 61 Top/Bottom Interval(mm): 250/1500 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 920.50 Core: 70 Top of Core Depth (m) : 919.00 Sect: 1 Top of Section Depth(m): 919.25 LITHOLOGY: APHANITIC BASALT; Piece No. : PCE 2 (26-35), 3 (38-71), 4 (73-75), 5 (78-98), 6 (100-121), 7 (124-136), 8 (139-148); Texture : GLASSY TO FINE-GRAINED, INTERIOR PORTIONS OF FLOW UNITS ARE MORE COARSE-GRAINED WITH A PHANERITIC MATRIX; Alteration : A FEW CLAY SPOTS ARE ALSO VISIBLE IN THE MORE PHANERITIC FRAGMENTS; Comments : UNIT BOUNDARY IN PCE 2, POSSIBLE UNIT BOUNDARY AT 100CM INDICATED BY FINER GRAINED BOTTOM OF FRAGMENT 5B HOWEVER THE FINE-GRAINED APOPHYSES INDICATE THAT THIS COULD BE A GRAIN SIZE HETEROGENEITY WITHIN A SINGLE UNIT; Replacement: CLAY Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 922.00 Core: 70 Top of Core Depth (m) : 919.00 Sect: 2 Top of Section Depth(m): 920.50 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 1 (1-29), 2 (31-41), 3 (44-149); Texture : APHYRIC, A FEW SMALL CPX PHENOS ARE VISIBLE, FINE- GRAINED APOPHYSES IN MEDIUM-GRAINED PCE, GRAIN SIZE INCREASES GRADUALLY THROUGH THIS SECTION, THE MIDDLE AND BOTTOM PORTIONS ARE PHANERITIC; Alteration : SLIGHTLY SPOTS OF CLAY AND CHALC AND PYRITE; Comments : PROBABLE UNIT BOUNDARY AT 135CM; Phenocrysts: CLINOPYROXENE ( RARE%) Replacement: CHALCEDONY PYRITE CLAY Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 923.49 Core: 70 Top of Core Depth (m) : 919.00 Sect: 3 Top of Section Depth(m): 922.00 LITHOLOGY: BASALT FRAGMENTS; Piece No. : PCE 1 (0-18), 2 (20-132), 3 (135-148); Texture : GRAIN SIZE VARIATIONS ARE RATHER FREQUENT AND WITHOUT APPARENT PATTERN; Comments : SEVERAL OF THE FRAGMENTS IN THIS SECTION ARE OUT OF STRATIGRAPHIC ORDER, EACH HANDFUL WAS PLACED IN POSITION AS IT WAS WITHDRAWN FROM THE LINERLESS CORE BARREL BUT WITHIN EACH HANDFUL THERE IS NO RELATIVE STRATIGRAPHIC POSITION INFORMATION AVAILABLE, A FEW INDIVIDUAL UNITS ARE REPRESENTED-(0-20) AND (20-63) AND (63-150), THE UNIT BOUNDARY AT 20CM IS UNCERTAIN; Alteration : MANY OF THE FRAGMENTS HAVE ABUNDANT CHALC AND ZEOLITE AND GREEN CLAY AND PYRITE ALTERATION SPOTS; Replacement: CHALCEDONY ZEOLITE PYRITE CLAY GREEN CLAY; Leg : 61 Top/Bottom Interval(mm): 0/ 250 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 923.75 Core: 70 Top of Core Depth (m) : 919.00 Sect: 4 Top of Section Depth(m): 923.50 LITHOLOGY: MEDIUM-GRAINED BASALT; Piece No. : PCE NO PCE NUMBERS ASSIGNED, INTERVAL (0-24); Texture : MEDIUM-GRAINED, SUB-PHANERITIC BASALT WITH PATCHY TEXTURE TYPICAL OF THE FLOW UNITS, FINE-GRAINED APOPLYSES IN MEDIUM-GRAINED BASALT; Leg : 61 Top/Bottom Interval(mm): 0/ 750 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 928.75 Core: 71 Top of Core Depth (m) : 928.00 Sect: 1 Top of Section Depth(m): 928.00 LITHOLOGY: BASALT+BASALTIC BRECCIA+POSSIBLE HYALOCLASTITE ALTERED PILLOW BRECCIA; Piece No. : PCE 1 (1-5), 2 (9-12), 3 (15-20), 4 (25-29), 5 (33-38), 6 (42-54), 7 (57-65), 8 (70-74); Texture : IN PCE 5 APHANITIC FRAGMENTS IN GREEN ALTERED BASALT MATRIX, IN PCE 6 LIGHT GRAY APHANITIC FRAGMENTS AND LIGHT GRAY APHANITIC ZONE AND LIGHT GREEN ALTERED ZONE AND COARSE GRAINED BASALT WITH MANY PYRITE+CALCITE+CLAY BLOTCHES, PCE 8 IS MADE UP OF 1)PYRITE+CA+CLAY ALTERATION POCKET 2)DARK GRAY APHANITIC BASALT 3)LIGHT GRAY SLIGHTLY MORE CRYSTALLINE BASALT(?) AND 4)LIGHT GREEN ALTERED BASALT WITH CLAY VEINLETS; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 932.50 Core: 72 Top of Core Depth (m) : 931.00 Sect: 1 Top of Section Depth(m): 931.00 LITHOLOGY: PLAG-CPX MICROPHYRIC BASALT; Piece No. : MASSIVE BASALT; PCE 1 (1-10), 2A (14-17), 2B (17-25), 2C (25-27), 3 (30-40), 4 (44-51), 5 (55-69), 6A (72-77), 6B (77-90), 7A (72-106), 7B (107-112), 7C (112-120), 7D (121-129), 7E (129-140), 7F (140-145), 7G (145-150); Texture : MICROPHYRIC, MEDIUM TO SLIGHTLY COARSE-GRAINED, SUBOPHITIC TO INTERGRANULAR; Structure : HOMOGENENEOUS MASSIVE BASALT, VEINS ARE FILLED BY CHLORITE; Alteration : SLIGHTLY SLIGHTLY FRESH; Phenocrysts: PLAGIOCLASE Size(mm): 1 CLINOPYROXENE Size(mm): 1 MAGNETITE Size(mm): 1 MAGN ID UNCERTAIN; Groundmass : PLAGIOCLASE CLINOPYROXENE MAGNETITE MICROLITES; Replacement: CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 934.00 Core: 72 Top of Core Depth (m) : 931.00 Sect: 2 Top of Section Depth(m): 932.50 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); Piece No. : PCE 1 (0-9), 2 (11-22), 3 (25-36), 4A (38-48), 4B (50-59), 4C (59-65), 5 (69-112), 6A (114-122), 6B (122-130), 7 (131-150); Texture : INTERVAL (0-78) IS SLIGHTLY COARSE-GRAINED(OPHITIC TO INTERGRANULAR), INTERVAL (78-88) DECREASING GRAIN SIZE DOWNWARD TO SLIGHTLY FINE (HYALOPILITIC), INTERVAL (88-92) IS FINE-GRAINED AND WITH CHILLED MARGIN WITH SPARSE CPX MICROPHENOS (APHYRIC), INTERVAL (92-95) IS SLIGHTLY FINE-GRAINED WITH SPARSE CPX MICROPHENOS, INTERVAL (95-150) IS SLIGHTLY COARSE-GRAINED TO MEDIUM; Structure : MASSIVE SILL; Alteration : SLIGHTLY; Phenocrysts: CLINOPYROXENE FEW, IN CHILLED MARGIN IN INTERVAL (88-92) AND IN INTERVAL (92-95); Leg : 61 Top/Bottom Interval(mm): 0/ 850 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 934.85 Core: 72 Top of Core Depth (m) : 931.00 Sect: 3 Top of Section Depth(m): 934.00 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); CONTINUED FROM SECTION 72-2; Piece No. : PCE 1 (0-5), 2 (5-28), 3 (20-28), 4A (30-40), 4B (40-45), 5 (48-62), 6 (65-70), 7 (71-84); Texture : SLIGHTLY COARSE-GRAINED; Structure : MASSIVE BASALT SILL; Alteration : SLIGHTLY; Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 938.45 Core: 73 Top of Core Depth (m) : 937.00 Sect: 1 Top of Section Depth(m): 937.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-9), 1B (6-15), 1C (15-27), 1D (28-35), 1E (35-50), 1F (51-70), 1G (70-81), 1H (82-90), 1I (90-100), 1J (102-110), 1K (110-122), 1L (120-130), 2 (133-145); Texture : SLIGHTLY COARSE TO COARSE-GRAINED, OPHITIC TO EQUIGRANULAR, THIS DOLERITE IS COMPOSED OF PHENOS OF PLAG AND CPX AND SOME MAGN; Structure : MASSIVE DOLERITE SILL, VEINS ARE FILLED WITH CHLORITE AND ZEOLITE; Alteration : SLIGHTLY; Phenocrysts: PLAGIOCLASE CLINOPYROXENE Groundmass : MAGNETITE PLAGIOCLASE CLINOPYROXENE Replacement: CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1490 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 939.99 Core: 73 Top of Core Depth (m) : 937.00 Sect: 2 Top of Section Depth(m): 938.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1 (1-10), 2A (13-21), 2B (24-30), 3 (33-45), 4A (48-53), 4B (54-57), 4C (48-65), 5 (69-77), 6A (80-85), 6B (85-93), 7 (95-116), 8 (120-130), 9A (134-140), 9B (140-143), 9C (145-149); Texture : SLIGHTLY COARSE TO COARSE-GRAINED; Structure : MASSIVE DOLERITE SILL; Alteration : SLIGHTLY; Comments : SAME UNIT AS PREVIOUS SECTION; Leg : 61 Top/Bottom Interval(mm): 0/ 600 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 940.60 Core: 73 Top of Core Depth (m) : 937.00 Sect: 3 Top of Section Depth(m): 940.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1 (0-7), 2 (12-15), 3A (18-23), 3B (24-27), 4 (30-34), 5 (36-45), 6 (46-60); Texture : IN PCE 1 SMALL CRUSHED PARTICLES ARE COARSE TO SLIGHTLY COARSE-GRAINED, PCE 2 IS COARSE TO SLIGHTLY COARSE-GRAINED, PCE 3A IS COARSE-GRAINED WITH MEGACRYSTS OF CPX (3-4MM)-THE MARGINS OF THESE CRYSTALS ARE REPLACED TO CLAY MINERALS, PCES 4+5 ARE SLIGHTLY MEDIUM-GRAINED, PCE 6 IS MEDIUM-GRAINED; Structure : MASSIVE DOLERITE SILL; Alteration : SLIGHTLY; Comments : POSSIBLE BOUNDARY AT 28CM; Phenocrysts: CLINOPYROXENE Size(mm): 3-4 CRYSTAL MARGINS ARE ALTERED TO A CLAY MINERAL; Replacement: CLAY MINERALS Minerals Replaced: CPX Leg : 61 Top/Bottom Interval(mm): 0/1420 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 947.42 Core: 74 Top of Core Depth (m) : 946.00 Sect: 1 Top of Section Depth(m): 946.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-10), 1B (12-20), 1C (21-34), 1D (35-60), 1E (60-76), 1F (76-85), 1G (84-92), 1H (92-95), 1I (95-106), 1J (107-115), 1K (115-125), 1L (125-135), 1M (135-141); Texture : PCES 1A-1M ARE MEDIUM-GRAINED WITH RARE MICROPHENOS OF CPX (SUBOPHITIC TO INTERSERTAL); Structure : MASSIVE DOLERITE SILL, IN PCES 1D+1E VEINS OF ZEOLITE+CHLORITE+PYRITE+MAGN(SMALL AMOUNT); Alteration : SLIGHTLY IN PCES 1D+1E ARE ALTERATION PATCHES OF THE SAME VEIN MATERIAL; Phenocrysts: CLINOPYROXENE ( RARE%) Replacement: ZEOLITE CHLORITE PYRITE MAGNETITE SMALL AMOUNTS OF MAGN; Leg : 61 Top/Bottom Interval(mm): 0/1470 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 948.97 Core: 74 Top of Core Depth (m) : 946.00 Sect: 2 Top of Section Depth(m): 947.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-15), 1B (15-20), 1C (20-48), 1D (49-72), 1E (73-106), 1F (107-146); Texture : PCE 1A IS MEDIUM-GRAINED, PCES 1B-1F ARE MEDIUM TO SLIGHTLY COARSE-GRAINED (OPHITIC TO INTERGRANULAR); Structure : MASSIVE DOLERITE SILL WITH VEINS FILLED WITH CHLORITE AND ZEOLITE; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 74-1; Replacement: CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1250 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 950.25 Core: 74 Top of Core Depth (m) : 946.00 Sect: 3 Top of Section Depth(m): 949.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-12), 1B (15-40), 1C (60-63), 1D (65-87), 1E (87-105), 1F (105-122); Texture : SLIGHTLY COARSE-GRAINED; Structure : MASSIVE DOLERITE SILL WITH VEINS OF CHLORITE AND ZEOLITE; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 74-2; Leg : 61 Top/Bottom Interval(mm): 0/1470 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 951.97 Core: 74 Top of Core Depth (m) : 946.00 Sect: 4 Top of Section Depth(m): 950.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-28), 1B (29-50), 1C (50-84), 1D (85-115), 1E (115-138), 1F (138-141), 1G (142-145); Texture : PCES 1B-1G ARE SLIGHTLY COARSE-GRAINED; Structure : MASSIVE DOLERITE SILL, IN PCE 1A INTERVAL (22-27) GRANOPHYRE SCHLIEREN; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 74-3; Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 953.45 Core: 74 Top of Core Depth (m) : 946.00 Sect: 5 Top of Section Depth(m): 952.00 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1A (0-15), 1B (14-27), 1C (27-32), 1D (31-50), 1E (50-56), 1F (57-70), 1G (70-77), 1H (78-90), 1I (91-107), 1J (128), 2 (120-130), 3 (130-145); Texture : SLIGHTLY COARSE-GRAINED; Structure : MASSIVE DOLERITE SILL, CHLORITE AND ZEOLITE VEINS; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 74-4; Replacement: CHLORITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/ 150 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 953.65 Core: 74 Top of Core Depth (m) : 946.00 Sect: 6 Top of Section Depth(m): 953.50 LITHOLOGY: MASSIVE DOLERITE SILL; Piece No. : PCE 1 (0-13); Texture : SLIGHTLY COARSE-GRAINED; Structure : MASSIVE DOLERITE SILL; Alteration : SLIGHTLY; Comments : SAME UNIT AS SECTION 74-5; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 954.50 Core: 75 Top of Core Depth (m) : 953.00 Sect: 1 Top of Section Depth(m): 953.00 LITHOLOGY: DIABASE; Piece No. : PCE 1 (5-10), 2A (13-25), 2B (25-32), 3A (33-43), 3B (39-46), 4 (48-67), 5A (70-80), 5B (74-87), 5C (83-120), 5D (115-132), 5E (126-140), 5F (140-150); Texture : HOLOXTALLINE MEDIUM-GRAINED DIABASIC(?) GNDMASS, MICROPHENOS OF PYX AND PLAG; Structure : JOINTS ARE LINED WITH DARK GREENISH BLACK CHLORITE(?), SECTION OF ROCK IS MEGASCOPICALLY HOMOGENEOUS; Alteration : SLIGHTLY; Comments : COLOR IS N5 GRAY; Phenocrysts: PLAGIOCLASE PYROXENE MICROPHENOS; Replacement: CHLORITE DARK GREENISH BLACK, ID UNCERTAIN; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 956.00 Core: 75 Top of Core Depth (m) : 953.00 Sect: 2 Top of Section Depth(m): 954.50 LITHOLOGY: DIABASE; Piece No. : PCE 1A (2-10), 1B (5-16), 1C (15-42), 1D (41-51), 1E (41-65), 1F (65-77), 2 (80-92), 3 (94-100), 4A (102-120), 4B (120-147); Texture : PYX AND PLAG MICROPHENOS IN A HOLOXTALLINE MEDIUM- GRAINED GNDMASS, NO SIGNIFICANT TEXTURAL VARIATIONS; Structure : JOINTS FREQUENTLY COATED WITH SLICKENSIDES AND A GREENISH-BLACK COATING, MEGASCOPICALLY HOMOGENEOUS; Alteration : SLIGHTLY VERY SLIGHT ALTERATION, PERHAPS WEATHERING; Comments : COLOR IS N5 GRAY; Phenocrysts: PLAGIOCLASE PYROXENE MICROPHENOS; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 957.50 Core: 75 Top of Core Depth (m) : 953.00 Sect: 3 Top of Section Depth(m): 956.00 LITHOLOGY: DIABASE; Piece No. : PCE 1A (3-6), 1B (4-10), 1C (10-22), 2 (25-47), 3A-3E (49-60), 4A (61-80), 4B (75-97), 4C (97-106), 4D (106-115), 5 (115-140); Texture : PYX AND FELDSPAR (LATHS) MICROPHENOS IN A HOLOXTALLINE MEDIUM-GRAINED DIABASIC (?) GNDMASS; Structure : HOMOGENEOUS ROCK WITH RARE VEINS (THIN LAYERS ON JOINTS), MOST BREAKS ARE ALONG THESE VEINS; Alteration : SLIGHTLY; Comments : COLOR IS N5 GRAY, PCE 5 PLACED IN SHRINK TUBING FOR CUTTING (MAY AFFECT MAGNETIC STUDIES); Phenocrysts: FELDSPAR PYROXENE MICROPHENOS; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 959.00 Core: 75 Top of Core Depth (m) : 953.00 Sect: 4 Top of Section Depth(m): 957.50 LITHOLOGY: DIABASE; Piece No. : PCE 1 (2-24), 2 (25-35), 3 (36-45), 4A (47-55), 4B (55-75), 5A (78-80), 5B (80-102), 5C (102-127), 6A (131-143), 6B (143-150); Texture : MICROPHENOS OF PYX AND PLAG IN A HOLOXTALLINE MEDIUM GRAINED GNDMASS; Structure : JOINTING IS IRREGULAR BUT MORE COMMON THAN IN SECTIONS 1-3,MOST JOINTS LINED BY PALE GREEN FIBROUS MATERIAL, TEXTURE IS MEGASCOPICALLY HOMOGENEOUS THROUGHOUT; Alteration : SLIGHTLY PARTICULARLY ALONG JOINTS; Comments : COLOR N5 GRAY, PCES 1+4B+5C WERE PUT IN SHRINK TUBING FOR CUTTING, MAY AFFECT PALEOMAGNETICS; Phenocrysts: PLAGIOCLASE PYROXENE MICROPHENOS; Replacement: PALE GREEN FIBROUS MINERAL LINING JOINTS; Leg : 61 Top/Bottom Interval(mm): 0/1440 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 960.44 Core: 75 Top of Core Depth (m) : 953.00 Sect: 5 Top of Section Depth(m): 959.00 LITHOLOGY: DIABASE; Piece No. : PCE 1 (1-20), 2 (22-55), 3 (57-66), 4 (70-82), 5 (85-90), 6 (93-107), 7 (110-123), 8 (125-140); Texture : HOLOXTALLINE MEDIUM-GRAINED GNDMASS, EXCELLENT SLICKENSIDE DEVELOPMENT AT THE BASE OF PCE 4 WITH SOME PYRITE CRYSTALS(DARK GREEN TO BLACK); Structure : MEGASCOPICALLY HOMOGENEOUS EXCEPT FOR A FEW PATCHES OF SLIGHTLY MORE MAFIC REGIONS-MOSTLY NEAR THE BASE OF PCE 7 AND THE TOP OF PCE 8; Comments : COLOR IS N5 GRAY; Phenocrysts: PYROXENE MICROPHENOS; Groundmass : PYROXENE PLAGIOCLASE Replacement: PYRITE DARK GREEN TO BLACK IN COLOR; Leg : 61 Top/Bottom Interval(mm): 0/ 720 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 958.72 Core: 76 Top of Core Depth (m) : 958.00 Sect: 1 Top of Section Depth(m): 958.00 LITHOLOGY: BASALT(DIABASE); Piece No. : PCE 1 (5-10), 2 (11-20), 3 (22-35), 4 (35-54), 5 (56-70); Texture : HOLOXTLLINE GNDMASS, PCES 1-4 HAVE DIABASIC TEXTURE, PCE 5 APPEARS FINER GRAINED THAN OTHERS BUT EXHIBITS NO TEXTURAL VARIATION; Structure : MEGASCOPICALLY HOMOGENEOUS, PCE 5 CONTAINS GREEN ALTERATION MINERAL+PYRITE+ZEOLITE ALONG FRACTURE ZONE; Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N5 GRAY, PCE 3 IS RUBBLE (BAGGED); Phenocrysts: PYROXENE Groundmass : PYROXENE PLAGIOCLASE Replacement: PYRITE ZEOLITE Alteration : MOD; Comments : COLOR IS N5 GRAY, INTERVAL BETWEEN PCES 3E AND 4A INTERPRETED AS CONTACT SEPARATING TWO COOLING UNITS- NO GLASS FOUND HOWEVER; Groundmass : PLAGIOCLASE PYROXENE Replacement: PYRITE Size(mm): TO 7 ABUNDANT; ZEOLITE ID UNCERTAIN; CALCITE ID UNCERTAIN; A GREEN MINERAL IS PRESENT IN VEINS THAT FILL FRACTURES; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 968.50 Core: 77 Top of Core Depth (m) : 967.00 Sect: 1 Top of Section Depth(m): 967.00 LITHOLOGY: DIABASE; APPEARS IDENTICAL TO BASALT DESCRIBED IN CORE 76 EXCEPT FOR VARIATION OF GRAIN SIZE; Piece No. : PCE 1 (2-10), 2 (12-31), 3A (34-54), 3B (52-55), 3C (55-66), 3D (66-69), 3E (68-73), 4A (80-87), 4B (87-101), 4C (101-112), 4D (112-120), 4E (120-135), 4F (135-142), 4G (142-149); Texture : HOLOCRYSTALLINE, NO GLASS FOUND, GRAIN SIZE DECREASES DOWNWARD FROM TOP TO BOTTOM OF PCE 3E THEN COARSENS FROM TOP OF PCE 4A TO END OF SECTION; Structure : ROCK IS HIGHLY FRACTURED AND CONTAINS A GREEN MINERAL AND ABUNDANT PYRITE (AS MUCH AS 7MM ACROSS) AND ZEOLITE(?) AND CALCITE(?) IN VEINS THAT FILL FRACTURES, OPTICAL EXAMINATION OF WHITE VEIN MATERIAL IN PCE 4F REVEALS CALCITE-NO ZEOLITE NOTED; Comments : INTERVAL BEYWEEN PCES 3E AND 4A INTERPRETED AS CONTACT SEPARATING TWO COOLING UNITS, BASALT IS N5 GRAY; Groundmass : PLAGIOCLASE PYROXENE Replacement: PYRITE Size(mm): TO 7 ZEOLITE ID UNCERTAIN; CALCITE Leg : 61 Top/Bottom Interval(mm): 0/1420 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 969.92 Core: 77 Top of Core Depth (m) : 967.00 Sect: 2 Top of Section Depth(m): 968.50 LITHOLOGY: DIABASE; Piece No. : PCE 1A (2-7), 1B (7-13), 1C (14-20), 1D (20-27), 2A (30-32), 2B (31-39), 2C (40-48), 2D (48-59), 2E (59-69), 2F (70-89), 2G (89-101), 2H (102-111), 2I (111-119), 2J (119-132), 2K (131-140); Texture : HOMOGENEOUS HOLOCRYSTALLINE ROCK COMPOSED OF INTERLOCKING PLAG AND PYX FORMING A DIABASIC TEXTURE; Structure : NUMEROUS FRACTURES AND VEINS FILLED WITH PYRITE AND ZEOLITE(?); Alteration : MOD LITTLE OR NO OBVIOUS ALTERATION OF ROCK AWAY FROM VEINS; Comments : BASALT IS N5-N6 GRAY; Groundmass : PLAGIOCLASE PYROXENE Replacement: PYRITE ZEOLITE Leg : 61 Top/Bottom Interval(mm): 0/1340 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 971.34 Core: 77 Top of Core Depth (m) : 967.00 Sect: 3 Top of Section Depth(m): 970.00 LITHOLOGY: DIABASE; Piece No. : PCE 1A (1-30), 1B (30-40), 1C (40-55), 1D (55-65), 2A (70-72), 2B (71-85), 3A (86-90), 3B (89-96), 3C (96-102), 3D (102-107), 3E (107-115), 4 (118-130); Texture : DIABASIC TEXTURE; Structure : MEGASCOPICALLY HOMOGENEOUS, NUMEROUS FRACTURES SOME OF WHICH CONTAIN VEINS CONSISTING OF PYRITE+ ZEOLITE(?)+A DARK GREEN ALTERATION; Alteration : FRESH TO SLIGHTLY; Comments : N5 GRAY; Groundmass : PLAGIOCLASE PYROXENE Replacement: PYRITE ZEOLITE ID UNCERTAIN; A DARK GREEN ALTERATION MINERAL ALSO IN VEINS; Leg : 61 Top/Bottom Interval(mm): 0/1360 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 977.36 Core: 78 Top of Core Depth (m) : 976.00 Sect: 1 Top of Section Depth(m): 976.00 LITHOLOGY: DIABASE; Piece No. : PCE 1 (2-5), 2A (6-10), 2B (10-18), 2C (19-21), 2D (20-34), 2E (34-41), 2F (41-49), 2G (48-55), 3A (56-70), 3B (71-80), 3C (80-90), 4 (91-105), 5 (107-115), 6 (118-125), 7 (128-132); Texture : FINE-GRAINED DIABASE, SCATTERED AUGITE MICROPHENOS; Structure : MEGASCOPICALLY HOMOGENEOUS, MANY FRACTURES LINED WITH A GREENISH BLACK COATING AND CALCITE CRYSTALS, Texture : SOME FRACTURES CONTAIN PYRITE; Alteration : SLIGHTLY; Comments : COLOR IS N6 GRAY; Phenocrysts: AUGITE SCATTERED MICROPHENOS; Replacement: CALCITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1370 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 978.87 Core: 78 Top of Core Depth (m) : 976.00 Sect: 2 Top of Section Depth(m): 977.50 LITHOLOGY: DIABASE; Piece No. : PCE 1A (2-11), 1B (12-18), 1C (19-22), 2A (25-35), 2B (35-50), 3 (52-65), 4 (67-70), 5 (71-81), 6 (84-92), 7A (95-108), 7B (108-117), 8 (120-135); Texture : PCES 1-4 ARE HOMOGENEOUSLY FINE-GRAINED, PCES 5-8 ARE SLIGHTLY COARSER-GRAINED, SCATTERED AUGITE MICROPHENOS; Structure : SEVERAL FRACTURES LINED WITH A GREENISH BLACK COATING, SOME CALCITE AND PYRITE CRYSTALS ALONG THE FRACTURES, HOMOGENEOUSLY FINE-GRAINED; Alteration : SLIGHTLY; Comments : COLOR IS N6 GRAY; Phenocrysts: AUGITE SCATTERED AUGITE MICROPHENOS; Replacement: CALCITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 980.45 Core: 78 Top of Core Depth (m) : 976.00 Sect: 3 Top of Section Depth(m): 979.00 LITHOLOGY: DIABASE; Piece No. : PCE 1 (3-15), 2A (17-31), 2B (31-36), 3 (40-48), 4A (50-60), 4B (59-70), 4C (70-75), 5 (78-82), 6 (85-90), 7 (94-100), 8 (103-110), 9 (102-120), 10 (121-132), 11 (135-141); Texture : PCES 1-4B ARE HOMOGENEOUSLY MEDIUM-GRAINED, THE BOTTOM OF 4C BECOMES FINER GRAINED AND REMAINS FINE-GRAINED THROUGH PCE 11, SCATTERED AUGITE MICROPHENOS; Structure : SEVERAL FRACTURES LINED WITH A GREENISH BLACK COATING-OFTEN WITH SLICKENSIDES, SOME CALCITE CRYSTALS ALONG FRACTURES; Alteration : SLIGHTLY; Comments : COLOR IS N6 GRAY, PCES 2+4 HEAT TREATED DURING WRAPPING TO BE SAVED; Phenocrysts: AUGITE SCATTERED AUGITE MICROPHENOS; Replacement: CALCITE GREENISH BLACK COATING LINING FRACTURES; Leg : 61 Top/Bottom Interval(mm): 0/1460 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 986.46 Core: 79 Top of Core Depth (m) : 985.00 Sect: 1 Top of Section Depth(m): 985.00 LITHOLOGY: COARSE BASALT OR MEDIUM-GRAINED DIABASE; Piece No. : PCE 1A (3-9), 1B (5-25), 1C (24-32), 1D (32-48), 1E (49-54), 1F (53-60), 1G (63-72), 1H (76-82), 1I (82-91), 1J (91-102), 1K (102-113), 1L (113-125), 1M (122-133), 1N (134-145); Texture : COARSE BASALT OR MEDIUM-GRAINED DIABASE, HOMOGENEOUS IN GRAIN SIZE, SLIGHT GRAIN SIZE DECREASE POSSIBLE IN PCES 1E+1F BUT PROBABLY NOT ENOUGH TO SEPARATE INTO UNITS, SMALL MAFIC CLOTS APPEAR TO BE CPX MICROPHENOS; Structure : VEINED WITH CALCITE+DARK GREEN MINERAL+PYRITE IN PCES 1A+1B+1F+1I+1J+1L, GREATLY FRACTURED AND JOINTED THROUGHOUT, HOMOGENEOUS IN GRAIN SIZE; Alteration : MOD; Comments : PCES 1G+1H HEAT TREATED; Phenocrysts: CLINOPYROXENE SMALL MAFIC CLOTS APPEAR TO BE CPX MICROPHENOS; Replacement: CALCITE PYRITE DARK GREEN MINERAL; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 988.00 Core: 79 Top of Core Depth (m) : 985.00 Sect: 2 Top of Section Depth(m): 986.50 LITHOLOGY: COARSE BASALT OR MEDIUM-GRAINED DIABASE; Piece No. : PCE 1 (4-14), 2A (15-27), 2C (40-50), 2D (48-57), 2E (57-67), 2F (65-70), 2G (72-80), 2H (79-87), 2I (87-100), 2J (96-105), 2K (104-110), 3 (112-120), 4A (120-130), 4B (130-150); Texture : COARSE BASALT OR MEDIUM-GRAINED DIABASE, HOMOGENEOUS IN GRAIN SIZE, DARK MAFIC MINERALS APPEAR TO BE MICROPHENOS; Structure : RARE VEINS OF DARK GREEN MINERAL+CALCITE+PYRITE IN PCES 2B+2D+2H+3; Alteration : SLIGHTLY; Comments : HOMOGENEOUS IN COMPOSITION; Phenocrysts: DARK MAFIC MINERALS APPEAR TO BE MICROPHENOS; Replacement: CALCITE PYRITE DARK GREEN MINERAL IN VEIN; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 989.50 Core: 79 Top of Core Depth (m) : 985.00 Sect: 3 Top of Section Depth(m): 988.00 LITHOLOGY: COARSE BASALT OR MEDIUM-GRAINED DIABASE; Piece No. : PCE 1 (3-18), 2 (20-25), 3A (6-35), 3B (34-42), 3C (40-50), 3D (50-69), 3E (69-85), 3F (85-87), 3G (87-100), 3H (100-110), 3I (110-120), 3J (119-130), 3K (129-135), 3L (135-140), 3M (140-150); Texture : HOMOGENEOUS IN TEXTURE, PCE 1 MAY HAVE SLIGHTLY SMALLER OR FINER GRAIN SIZES THAN REMAINDER BUT DIFFERENCE IS NOT GREAT; Structure : FRACTURED SURFACES ARE COATED WITH DARK GREENISH BLACK MINERAL AND SOME VEINS HAVE CALCITE+PYRITE ALONG WITH THE DARK GREENISH BLACK (CHLORITE?) MINERAL, PYRITE VEIN PARTICULARLY PROMINENT IN PCES 3H AND 3I; Alteration : SLIGHTLY; Comments : RELATIVELY HOMOGENEOUS IN COMPOSITION; Replacement: DARK GREENISH BLACK MINERAL COATING FRACTURE SURFACES, POSSIBLY CHLORITE; PYRITE CALCITE Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 990.95 Core: 79 Top of Core Depth (m) : 985.00 Sect: 4 Top of Section Depth(m): 989.50 LITHOLOGY: COARSE BASALT OR MEDIUM-GRAINED DIABASE; Piece No. : PCE 1A (4-14), 1B (14-26), 1C (26-35), 1D (35-40), 1E (38-45), 1F (46-56), 1G (55-70), 1H (70-82), 1I (75-92), 1J (92-107), 1K (106-117), 1L (17-128), 1M (127-140); Texture : COARSE GRAINED BASALT OR MEDIUM-GRAINED DIABASE, HOMOGENEOUS GRAIN SIZE; Structure : MOST JOINTS COVERED WITH THIN COATING OF DARK GREENISH BLACK MINERAL (CHLORITE?) AND CALCITE AND SOME PYRITE; Alteration : SLIGHTLY; Comments : ROCK RELATIVELY HOMOGENEOUS MEGASCOPICALLY BOTH IN GRAIN SIZE AND COMPOSITION, PCES 1B+1G+1H+1I WERE HEAT TREATED; Replacement: DARK GREENISH BLACK MINERAL COATING FRACTURE SURFACES, POSSIBLY CHLORITE; PYRITE CALCITE Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 992.48 Core: 79 Top of Core Depth (m) : 985.00 Sect: 5 Top of Section Depth(m): 991.00 LITHOLOGY: COARSE BASALT OR MEDIUM-GRAINED DIABASE; Piece No. : PCE 1A (2-22), 1B (22-36), 1C (36-52), 1D (52-57), 1E (55-86), 1F (85-97), 1G (95-101), 1H (100-115), 1I (115-130), 1J (130-142); Texture : COARSE-GRAINED BASALT OR MEDIUM-GRAINED DIABASE, DECREASE IN GRAIN SIZE FROM TOP TO BOTTOM INDICATING PROBABLE BASE OF UNIT; Structure : RARE VEINS OF CHLORITE(?)+CALCITE+PYRITE; Alteration : SLIGHTLY; Comments : OVERLIES GRAYISH RED VOLCANIC CLAYSTONE-RED COLOR MAY BE CAUSED BY BAKING, COMPOSITION SEEMS RELATIVELY HOMOGENEOUS; Leg : 61 Top/Bottom Interval(mm): 0/ 160 Analyst: Hole: 462A Sample Midpoint (m) : 992.66 Core: 79 Top of Core Depth (m) : 985.00 Sect: 6 Top of Section Depth(m): 992.50 LITHOLOGY: SILTSTONE; Comments : ALMOST ENTIRELY ALTERED TO CLAY (SMEC?) AND IS PROBABLY A DEVITRIFIED HYALOCLASTITE; Leg : 61 Top/Bottom Interval(mm): 0/1100 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 996.60 Core: 80 Top of Core Depth (m) : 994.00 Sect: 2 Top of Section Depth(m): 995.50 LITHOLOGY: SEDIMENTS; Leg : 61 Top/Bottom Interval(mm): 1100/1500 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 997.00 Core: 80 Top of Core Depth (m) : 994.00 Sect: 2 Top of Section Depth(m): 996.60 LITHOLOGY: DIABASE; Piece No. : PCE 2 (113-117), 3 (120-132), 4 (135-150); Texture : TOP OF PCE 2 IS FINE-GRAINED, INTERVAL (120-149) IS MEDIUM-GRAINED WITH SCATTERED AUGITE MICROPHENOS; Structure : SEVERAL FRACTURES ARE PRESENT AND ARE COATED WITH USUAL GREENISH BLACK MATERIAL; Comments : COLOR IS N6 GRAY; Phenocrysts: AUGITE SCATTERED AUGITE MICROPHENOS; Replacement: GREENISH BLACK MATERIAL; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 998.50 Core: 80 Top of Core Depth (m) : 994.00 Sect: 3 Top of Section Depth(m): 997.00 LITHOLOGY: DIABASE; Piece No. : PCE 1 (2-20), 2A (24-31), 2B (31-46), 2C (46-60), 2D (59-74), 2E (70-81), 3 (84-97), 4 (99-104), 5A (105-110), 5B (110-119), 6A (120-127), 6B (127-135), 7 (135-148); Texture : FINE-GRAINED; Structure : SEVERAL FRACTURES, OFTEN HAVE CENTRAL PORTION FILLED WITH A DARK GREENISH BLACK MATERIAL THAT IS SURROUNDED BY A LIGHTER GREEN MATERIAL, WHITE CALCITE OCCASIONALLY OCCURS IN THE DARKER CENTRAL PART OF FRACTURES, MEGASCOPICALLY HOMOGENEOUS; Alteration : MOD; Comments : PCE 2E HAS BEEN HEAT TREATED; COLOR IS N6 GRAY; Replacement: DARK GREENISH BLACK MATERIAL SURROUNDED BY A LIGHTER GREEN MATERIAL IN VEINS; CALCITE OCCASIONALLY OCCURS; Leg : 61 Top/Bottom Interval(mm): 0/ 400 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 998.90 Core: 80 Top of Core Depth (m) : 994.00 Sect: 4 Top of Section Depth(m): 998.50 LITHOLOGY: DIABASE; Piece No. : PCE 1 (2-15), 2 (17-25), 3 (27-37); Texture : FINE-GRAINED, SCATTERED AUGITE MICROPHENOS; Structure : RELATIVELY UNFRACTURED, FRACTURE SURFACES COATED WITH A GREENISH BLACK COATING AND FIBROUS MATERIAL, SOME POCKETS OF GLASSY MATERIAL ON THE FRACTURES AT THE TOP OF PCE 2, MEGASCOPICALLY HOMOGENEOUS; Alteration : MOD; Comments : COLOR IS N6 GRAY, PCE 2 HAS BEEN HEAT TREATED; Phenocrysts: AUGITE SCATTERED MICROPHENOS; Replacement: FRACTURE SURFACES COATED WITH A GREENISH BLACK COATING AND FIBEROUS MINERAL; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 999.50 Core: 81 Top of Core Depth (m) : 998.00 Sect: 1 Top of Section Depth(m): 998.00 LITHOLOGY: BASALT; Piece No. : PCE 1 (2-8), 2 (10-15), 3A (17-27), 3B (27-35), 4A (40-55), 4B (55-70), 5A (70-80), 5B (80-90), 5C (85-100), 5D (100-107), 5E (107-110), 6A (112-120), 6B (121-123), 6C (122-126), 6D (126-136), 6E (135-141), 6F (142-145); Texture : SUBOPHITIC TO DIABASIC TEXTURE, NO TEXTURAL CHANGES OBSERVED OVER LENGTH OF SECTION; Structure : MEGASCOPICALLY HOMOGENEOUS, SOMEWHAT FRACTURED, SOME FRACTURES FILLED WITH VEINS OF PYRITE+CALCITE+A DARK GREEN MATERIAL (CHLORITE?, SMECTITE?); Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N5 GRAY; Groundmass : PLAGIOCLASE PYROXENE INTERLOCKING PLAG AND PYX FORMING A SUBOPHITIC TO DIABASIC TEXTURE; Replacement: PYRITE CALCITE A DARK GREEN MATERIAL POSSIBLY CHLORITE OR SMEC; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1001.00 Core: 81 Top of Core Depth (m) : 998.00 Sect: 2 Top of Section Depth(m): 999.50 LITHOLOGY: BASALT; Piece No. : PCE 1A (4-20), 1B (20-27), 2 (30-34), 3A (36-47), 3B (45-59), 3C (60-69), 3D (70-85), 4A (100-115), 4B (115-133), 4C (134-150); Texture : SUBOPHITIC TO DIABASIC TEXTURE, NO TEXTURAL VARIATION WITHIN LENGTH OF SECTION; Structure : MEGASCOPICALLY HOMOGENEOUS, SOME FRACTURING IN ROCK AND SOME OF THESE FRACTURES FILLED WITH PYRITE+ CALCITE+A DARK GREEN MATERIAL (CHLORITE?, SMEC?); Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N5 GRAY, PCE 4C HEATED IN SHRINK-TUBING FOR CUTTING; Groundmass : PLAGIOCLASE PYROXENE Replacement: CALCITE PYRITE A DARK GREEN MATERIAL POSSIBLY CHLORITE OR SMEC; Leg : 61 Top/Bottom Interval(mm): 0/ 870 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1001.87 Core: 81 Top of Core Depth (m) : 998.00 Sect: 3 Top of Section Depth(m): 1001.00 LITHOLOGY: BASALT; Piece No. : PCE 1A (3-10), 1B (10-15), 1C (16-30), 1D (30-47), 2A (50-67), 2B (68-83); Texture : SUBOPHITIC TO OPHITIC TEXTURE; Structure : HOMOGENEOUS THROUGHOUT, PYRITE AND DARK MATERIAL FILL SOME OF THE FRACTURES IN THE ROCK; Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N5 GRAY; Groundmass : PLAGIOCLASE PYROXENE PLAG AND PYX FORM SUBOPHITIC TO OPHITIC TEXTURE; Replacement: PYRITE A DARK MATERIAL IN FRACTURES; Leg : 61 Top/Bottom Interval(mm): 0/ 510 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1003.51 Core: 82 Top of Core Depth (m) : 1003.00 Sect: 1 Top of Section Depth(m): 1003.00 LITHOLOGY: BASALT; Piece No. : PCE 1A (5-8), 1B (10-14), 1C (20-25), 2A (27-28), 2B (27-31), 3 (24-38), 4A (40-48); Texture : TEXTURALLY HOMOGENEOUS DIABASIC BASALT, APPARENT PSEUDOMORPHS AFTER OL PHENOS SET IN A SUBOPHITIC TO OPHITIC GNDMASS; Structure : PYRITE AND A DARK GREEN MATERIAL LINE FRACTURE THAT SEPARATES PCES 4A+4B+4C; Alteration : FRESH TO SLIGHTLY; Comments : CUTTINGS FROM HOLE CONTAINED IN INTERVAL (3-19) SURROUNDS BASALT PCES 1A AND 1B, COLOR IS N5 GRAY, PCE 4 IS ONLY ORIENTABLE SAMPLE RECOVERED; Phenocrysts: OLIVINE ALTERED; Groundmass : PLAGIOCLASE PYROXENE SUBOPHITIC TO OPHITIC TEXTURE; Replacement: PYRITE DARK GREEN MATERIAL LINES FRACTURES; Leg : 61 Top/Bottom Interval(mm): 0/ 130 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 1004.13 Core: 83 Top of Core Depth (m) : 1004.00 Sect: 1 Top of Section Depth(m): 1004.00 LITHOLOGY: DIABASE; Piece No. : PCE 1 (2-11); Texture : FINE-GRAINED HOMOGENEOUS DIABASE, NO PHENOS; Structure : HOMOGENEOUS, NOT FRACTURED; Alteration : MOD; Comments : COLOR N5 GRAY; Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 1006.95 Core: 84 Top of Core Depth (m) : 1005.50 Sect: 1 Top of Section Depth(m): 1005.50 LITHOLOGY: DIABASE; Piece No. : PCE 1 (2-6), 2 (8-31), 3 (34-53), 4A (55-66), 4B (66-80), 5 (82-95), 6A (98-115), 6B (115-142); Texture : FINE-GRAINED HOMOGENEOUS DIABASE, NO PHENOS; Structure : HOMOGENEOUS, SOME SUBHORIZONTAL FRACTURES WITH GREENISH-BLACK COATINGS; Alteration : SLIGHTLY; Comments : COLOR IS N5 GRAY; Leg : 61 Top/Bottom Interval(mm): 0/1180 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 1008.18 Core: 84 Top of Core Depth (m) : 1005.50 Sect: 2 Top of Section Depth(m): 1007.00 LITHOLOGY: DIABASE; Piece No. : PCE 1A (2-27), 1B (27-60), 1C (60-72), 2A (75-92), 2B (92-115); Texture : MEDIUM-GRAINED DIABASE, NO PHENOS; Structure : MEGASCOPICALLY HOMOGENEOUS, SOME SUB-HORIZONTAL FRACTURES WITH A GREENISH-BLACK SURFACE COATING; Alteration : SLIGHTLY; Comments : COLOR IS N5 GRAY; Leg : 61 Top/Bottom Interval(mm): 0/1440 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 1009.94 Core: 84 Top of Core Depth (m) : 1005.50 Sect: 3 Top of Section Depth(m): 1008.50 LITHOLOGY: DIABASE; Piece No. : PCE 1A (2-65), 1B (65-95), 1C (95-100), 1D (101-125), 1E (125-132), 1F (134-142); Texture : MOSTLY FINE-GRAINED DIABASE, POSSIBLY SOME BIOTITE SLICKENSIDES OCCURS OCCASIONALLY, SCATTERED COARSER GRAINED MAFIC MINERAL CONCENTRATIONS ARE MEDIUM-GRAINED; Structure : FRACTURE SURFACES COATED WITH A GREENISH-BLACK COATING AND SOME CALCITE; Alteration : MOD; Comments : COLOR IS N5 GRAY; Groundmass : SCATTERED COARSER MAFIC MINERAL CONCENTRATIONS; Replacement: CALCITE COATING FRACTURE SURFACES; BIOTITE POSSIBLE BIOTITE SLICKENSIDES; Leg : 61 Top/Bottom Interval(mm): 0/1270 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 1011.27 Core: 84 Top of Core Depth (m) : 1005.50 Sect: 4 Top of Section Depth(m): 1010.00 LITHOLOGY: DIABASE; Piece No. : PCE 1A (4-20), 1B (20-42), 1C (42-46), 1D (45-63), 2 (65-102), 3A (105-125), 3B (112-125); Texture : MOSTLY FINE-GRAINED DIABASE, SCATTERED COARSER GRAINED MAFIC MINERAL CONCENTRATIONS ARE MEDIUM- GRAINED; Structure : FRACTURE SURFACES COATED WITH A GREENISH-BLACK MATERIAL THAN CONTAINS SCATTERED PYRITE; Alteration : MOD; Comments : COLOR IS N5 GRAY; Replacement: PYRITE FRACTURE SURFACES COATED WITH A GREENISH-BLACK MATERIAL; Leg : 61 Top/Bottom Interval(mm): 0/1410 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1012.91 Core: 84 Top of Core Depth (m) : 1005.50 Sect: 5 Top of Section Depth(m): 1011.50 LITHOLOGY: DIABASE; Piece No. : PCES 1A (4-16), 1B (16-20), 1C (10-35), 1D (35-67), 1E (66-69), 2A (71-90), 3 (93-110), 4A (111-116), 4B (116-125), 5 (127-140); Texture : SUBOPHITIC TEXTURE; Structure : FRACTURES ARE COMMONLY COATED WITH THIN LAYER OF DARK-GREEN CLAY LIKE MATERIAL, PCES 1A-1D CONTAIN SUB-HORIZONTAL LAYERS OF MAFIC MINERAL CONCENTRATIONS, REMAINDER OF SECTION APPEARS MEGASCOPICALLY HOMOGENEOUS; Alteration : FRESH TO SLIGHTLY; Comments : N5 GRAY COLOR; Groundmass : PLAGIOCLASE PYROXENE Leg : 61 Top/Bottom Interval(mm): 0/1370 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1014.37 Core: 84 Top of Core Depth (m) : 1005.50 Sect: 6 Top of Section Depth(m): 1013.00 LITHOLOGY: BASALT(DIABASE); Piece No. : PCE 1A (5-10), 1B (10-35), 1C (35-43), 1D (43-58), 2 (60-67), 3A (69-86), 3B (86-100), 4 (102-107), 5A (110-126), 5B (127-135); Texture : SUBOPHITIC TEXTURE, GRAIN SIZE APPEARS TO BE FAIRLY UNIFORM THROUGHOUT SECTION; Structure : SLIGHTLY FRACTURED AND LINED WITH DARK CLAY-LIKE MATERIAL; Alteration : FRESH TO SLIGHTLY; Comments : COLOR=N5 GRAY; Groundmass : LOCAL CONCENTRATIONS OF MAFIC MINERALS OCCUR RANDOMLY THROUGHOUT; Replacement: DARK GREEN CLAY-LIKE MATERIAL LINES FRACTURES; Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1015.90 Core: 85 Top of Core Depth (m) : 1014.50 Sect: 1 Top of Section Depth(m): 1014.50 LITHOLOGY: DIABASE; Piece No. : PCE 1A (2-12), 1B (12-21), 1C (21-35), 1D (35-59), 2A (60-70), 2B (70-90), 3 (92-95), 4A (96-110), 4B (110-123), 4C (121-130), 4D (130-139); Texture : SUBOPHITIC TEXTURE, GRAIN SIZE APPEARS TO BE FAIRLY UNIFORM THROUGHOUT SECTION; Structure : SLIGHTLY FRACTURED AND LINED WITH DARK CLAY-LIKE MATERIAL AND FILLED WITH PYRITE; Alteration : FRESH TO SLIGHTLY; Comments : COLOR=N5 GRAY, PCES 1C+1D PUT IN HEAT-SHRINK PLASTICS FOR CUTTING; Leg : 61 Top/Bottom Interval(mm): 0/1430 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1017.43 Core: 85 Top of Core Depth (m) : 1014.50 Sect: 2 Top of Section Depth(m): 1016.00 LITHOLOGY: DIABASE; Piece No. : PCE 1A (2-62), 1B (60-81), 1C (81-101), 1D (101-107), 1E (106-120), 1F (119-126), 2 (128-131), 3 (133-141); Texture : SUBOPHITIC TEXTURE, GRAIN SIZE GENERALLY UNIFORM THROUGHOUT SECTION; Structure : SOMEWHAT FRACTURED, A LIGHT GREEN CLAY-LIKE MATERIAL FILLS SOME OF THE FRACTURES; Alteration : FRESH TO SLIGHTLY; Comments : COLOR=N5 GRAY; Groundmass : PYROXENE PLAGIOCLASE Replacement: A LIGHT GREEN CLAY-LIKE MATERIAL FILLS SOME OF THE FRACTURES; Leg : 61 Top/Bottom Interval(mm): 0/1470 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1018.97 Core: 85 Top of Core Depth (m) : 1014.50 Sect: 3 Top of Section Depth(m): 1017.50 LITHOLOGY: DIABASE; Piece No. : PCE 1A (3-6), 1B (5-16), 2 (18-27), 3A (30-45), 3B (45-61), 3C (60-70), 3D (70-86), 3E (86-87), 3F (86-105), 4A (106-112), 4B (112-119), 5A (120-130), 5B (127-136), 5C (136-145); Texture : SUBOPHITIC TEXTURE, GRAIN SIZE IS GENERALLY UNIFORM THROUGHOUT; Structure : DARK-GREEN CLAY-LIKE MATERIAL FILLS SOME OF THE FRACTURES; Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N5 GRAY, PCES 3C(BAGGED RUBBLE)+5C+LOWER END OF PCE 3B WERE PUT IN HEAT-SHRINK TUBING FOR CUTTING; Groundmass : PYROXENE PLAGIOCLASE Leg : 61 Top/Bottom Interval(mm): 0/1450 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1020.45 Core: 85 Top of Core Depth (m) : 1014.50 Sect: 4 Top of Section Depth(m): 1019.00 LITHOLOGY: DIABASE; Piece No. : PCE 1A (4-15), 1B (15-22), 1C (23-27), 1D (28-47), 2A (50-67), 2B (67-79), 2C (79-86), 2D (86-98), 3 (100-116), 4 (118-126), 5 (128-135), 6 (136-144); Texture : SUBOPHITIC, GRAIN SIZE IS UNIFORM THROUGHOUT; Structure : LIGHT GREEN MATERIAL FILLS VEINS IN PCES 1A-1D AND 2A+2B; Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N5 GRAY; Leg : 61 Top/Bottom Interval(mm): 0/ 310 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1020.81 Core: 85 Top of Core Depth (m) : 1014.50 Sect: 5 Top of Section Depth(m): 1020.50 LITHOLOGY: DIABASE; Piece No. : PCE 1 (4-10), 2A (12-20), 2B (20-30); Texture : SUBOPHITIC, UNIFORM TEXTURE THROUGHOUT; Alteration : FRESH TO SLIGHTLY; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 1027.48 Core: 87 Top of Core Depth (m) : 1026.00 Sect: 1 Top of Section Depth(m): 1026.00 LITHOLOGY: DIABASE; Piece No. : PCE 1 (3-8), 2 (11-15), 3 (17-20), 4A (22-35), 4B (36-45), 5A (47-50), 5B (50-57), 6A (70-72), 6B (71-81), 6C (81-90), 6D (91-100), 6E (101-113), 7 (115-145); Texture : FINE-GRAINED DIABASE; Structure : FRACTURES LINED WITH A GREENISH-BLACK COATING AND SOMETIMES IN SLICKENSIDES; Alteration : MOD; Comments : COLOR IS N6 GRAY, MEGASCOPICALLY SIMILAR ROCK ALONG ENTIRE SECTION; Groundmass : MANY SMALL SCATTERED MAFIC MINERAL CONCENTRATIONS; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 1029.00 Core: 87 Top of Core Depth (m) : 1026.00 Sect: 2 Top of Section Depth(m): 1027.50 LITHOLOGY: DIABASE; Piece No. : PCE 1A (4-15), 1B (15-25), 1C (26-27), 2A (30-39), 2B (40-48), 3A (50-56), 3B (50-56), 3C (57-60), 4A (61-70), 4B (70-78), 4C (79-91), 4D (92-100), 4E (100-117), 4F (111-128), 4G (128-140), 4H (139-146); Texture : FINE-GRAINED MOSTLY HOMOGENEOUS; Structure : FRACTURES ARE COVERED WITH THE USUAL GREENISH-BLACK Texture : COATING, SOME PYRITE CRYSTALS ARE PRESENT ALONG THE FRACTURES, MEGASCOPICALLY HOMOGENEOUS; Alteration : MOD; Comments : COLOR IS N5 GRAY; Replacement: PYRITE Groundmass : SCATTERED POORLY DEFINED MAFIC MINERAL CONCENTRATIONS; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1034.00 Core: 88 Top of Core Depth (m) : 1032.50 Sect: 1 Top of Section Depth(m): 1032.50 LITHOLOGY: DIABASE; Piece No. : PCE 1 (4-7), 2A (10-21), 2B (22-26), 3A (28-30), 3B (32-33), 4A (35-50), 4B (49-57), 4C (52-70), 4D (69-77), 5A (80-95), 5B (95-116), 5C (116-128), 5D (129-135), 5C (135-148); Texture : SUBOPHITIC TEXTURE, GRAIN SIZE IS MEGASCOPICALLY UNIFORM; Structure : NUMEROUS SUB-HORIZONTAL FRACTURES, MOST ARE FILLED WITH A DARK-GREEN CLAY-LIKE MATERIAL; Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N5 GRAY; Leg : 61 Top/Bottom Interval(mm): 0/1400 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1035.40 Core: 88 Top of Core Depth (m) : 1032.50 Sect: 2 Top of Section Depth(m): 1034.00 LITHOLOGY: DIABASE; Piece No. : PCE 1A (3-10), 1B (10-14), 1C (5-35), 1D (35-54), 1E (54-105), 1F (105-130), 1G (130-138); Texture : MOST OF SECTION EXHIBITS A SUBOPHITIC TEXTURE BUT SOME AREAS ARE COARSER GRAINED; Structure : DARK-GREEN CLAY-LIKE MATERIAL FILLS MOST OF THE FRACTURES; Alteration : FRESH TO SLIGHTLY; Comments : MAY BE MICROPEGMATITES BUT CONTACTS ARE ALL GRADATIONAL AND MAY SIMPLY REPRESENT LOCAL INHOMOGENEITIES IN ORIGINAL MAGMA; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1037.00 Core: 88 Top of Core Depth (m) : 1032.50 Sect: 3 Top of Section Depth(m): 1035.50 LITHOLOGY: DIABASE; Piece No. : PCE 1A (3-30), 1B (30-41), 2 (42-45), 3 (47-56), 4 (59-70), 5A (71-81), 5B (82-80), 5C (90-100), 6 (101-103), 7A (105-118), 7B (120-131), 7C (131-136), 7D (136-142), 7E (143-148); Texture : SUBOPHITIC, SOME AREAS ARE COARSER GRAINED THAN BULK OF ROCK; Structure : FEW FRACTURES ARE PRESENT THAT ARE FILLED BY A DARK- GREEN CLAY-LIKE MATERIAL; Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N5 GRAY, CONTACTS ARE GRADATIONAL AND MAY REPRESENT INHOMOGENEITIES IN ORIGINAL MAGMA OR POSSIBLY MICROPEGMATITES; Leg : 61 Top/Bottom Interval(mm): 0/ 220 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1037.22 Core: 88 Top of Core Depth (m) : 1032.50 Sect: 4 Top of Section Depth(m): 1037.00 LITHOLOGY: DIABASE; Piece No. : PCE 1A (4-12), 1B (13-20); Texture : UNIFORM SUBOPHITIC TEXTURE; Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N5 GRAY; Leg : 61 Top/Bottom Interval(mm): 0/1470 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1037.97 Core: 89 Top of Core Depth (m) : 1036.50 Sect: 1 Top of Section Depth(m): 1036.50 LITHOLOGY: DIABASE; Piece No. : PCE 1 (3-10), 2 (12-17), 3 (20-30), 4 (34-45), 5A (46-57), 5B (57-74), 6A (76-81), 6B (81-93), 7 (104-115), 8 (119-126), 9 (129-145); Texture : UNIFORM SUBOPHITIC TEXTURE THROUGHOUT SECTION; Alteration : FRESH TO SLIGHTLY; Comments : COLOR=N5 GRAY; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1039.50 Core: 89 Top of Core Depth (m) : 1036.50 Sect: 2 Top of Section Depth(m): 1038.00 LITHOLOGY: BASALT; Piece No. : PCE 1 (4-20), 2A (23-27), 2B (28-42), 2C (42-50), 2D (50-56), 3 (48-61), 4 (63-66), 5 (69-75), 6A (77-86), 6B (87-95), 6C (95-101), 6D (102-113), 7 (115-125), 8A (128-140), 8B (140-146), 8C (147-150); Texture : SUBOPHITIC IN UPPER PART OF PCE 1 TO APHANITIC IN LOWER PART OF PCE 1 AND REMAINS FINE-GRAINED THROUGHOUT REST OF SECTION; Structure : FRACTURING OF THE ROCK IS GREATER DOWN SECTION, THE FRACTURES ARE FILLED WITH PYRITE+ZEOLITE(?)+DARK GREEN CLAY-LIKE MATERIAL, PCE 3 APPEARS TO REPRESENT PART OF A LARGE VEIN THAT CONTAINS CALCITE AND A TRANSPARENT WHITE MINERAL TENTATIVELY IDENTIFIED AS THOMPSONITE(PARALLEL EXTINCTION, LOW BIREFRINGENCE,GOOD CLEAVAGE, RI APPROX. 1.51-1.53); Alteration : FRESH TO MOD LOCAL PATCHES OF ZEOLITE(?) AND A DARK GREEN ALTERATION MINERAL OCCUR LOCALLY-ESPECIALLY IN PCE 2B; Comments : PCES 2D+6A-6D+7+8A-8C PLACED IN HEAD-SHRINK TUBING FOR CUTTING; Replacement: SMALL DARK GRAINS ARE PRESENT IN ROCK THAT APPEAR TO BE OL PSEUDOMORPHS; PYRITE CALCITE ZEOLITE ID UNCERTAIN; A TRANSPARENT WHITE MINERAL TENTATIVELY IDENTIFIED AS THOMPSONITE; Leg : 61 Top/Bottom Interval(mm): 0/1380 Analyst: Windom, K Hole: 462A Sample Midpoint (m) : 1040.88 Core: 89 Top of Core Depth (m) : 1036.50 Sect: 3 Top of Section Depth(m): 1039.50 LITHOLOGY: BASALT; Piece No. : PCE 1A (2-11), 1B (13-22), 1C (24-30), 2 (32-35), 3A (36-39), 3B (40-42), 4 (45-47), 5A (50-55), 5B (55-62), 5C (62-72), 6 (74-77), 7 (80-85), 8 (86-90), 9A (93-100), 9B (100-107), 10A (117-127), 10B (129-136); Texture : TOP OF SECTION IS FINE-GRAINED GRADING TO COARSER GRAINED AT BOTTOM WHERE TEXTURE BECOMES SUBOPHITIC; Structure : DEGREE OF FRACTURING SEEMS TO BE ASSOCIATED WITH GRAIN SIZE WITH THE FINE-GRAINED PORTIONS BEING THE MOST HIGHLY FRACTURED, MANY OF THE FRACTURES ARE FILLED WITH PYRITE+AN UNKNOWN WHITE MINERAL+A DARK GREEN MINERAL, A VERY DENSE-LOOKING (FINE-GRAINED) LIGHT GREEN MATERIAL IS PRESENT IN PCES 5A-5C; Alteration : FRESH TO SLIGHTLY; Comments : COLOR IS N6 GRAY FOR THE FINE-GRAINED PORTIONS AND N5 GRAY FOR THE COARSE-GRAINED PORTIONS, PCES 5A-5C+ 9A-9C WERE PUT IN HEAT-SHRINK PLASTIC FOR CUTTING; Replacement: PYRITE AN UNKNOWN WHITE MINERAL AND A DARK GREEN MINERAL; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 1043.00 Core: 90 Top of Core Depth (m) : 1041.50 Sect: 1 Top of Section Depth(m): 1041.50 LITHOLOGY: BASALT; Piece No. : PCE 1 (4-12), 2A (12-27), 2B (27-34), 3A (35-45), 3B (45-54), 3C (55-62), 4 (65-71), 5A (74-92), 5B (92-110), 5C (110-117), 6 (120-122), 7A (123-130), 7B (130-145), 7C (143-150); Texture : FINE TO MEDIUM-GRAINED FROM TOP TO BOTTOM; Structure : GREATLY FRACTURED, SOME GREEN AND WHITE VEINS- CHLORITE+ZEOLITE, GREENISH BLACK VEINS AND JOINT COATINGS, SOME N8 VERY LIGHT GRAY VEINS, PYRITE VEIN AT 143CM; Alteration : MOD; Comments : TOP OF COOLING UNIT NEAR TOP OF SECTION BECOMING COARSER GRAINED TOWARDS BASE; N5 MEDIUM GRAY, GREENISH BLACK VEINS ARE 5GY2/1; Replacement: CHLORITE ZEOLITE PYRITE Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 1044.50 Core: 90 Top of Core Depth (m) : 1041.50 Sect: 2 Top of Section Depth(m): 1043.00 LITHOLOGY: MEDIUM-GRAINED BASALT; Piece No. : PCE 1A (2-11), 1B (11-20), 1C (20-35), 1D (35-40), 1E (37-49), 1F (49-55), 2A (56-65), 2B (65-72), 2C (72-800, 2D (82-87), 2E (88-95), 2F (95-100), 2G (100-110), 2H (110-120), 3A (122-135), 3B (135-146); Texture : MEDIUM-GRAINED; Structure : 5GY2/1 GREENISH BLACK VEINS AND JOINT COATINGS, SOME COATINGS, SOME N8 VERY LIGHT GRAY VEINS, GREATLY FRACTURED; Alteration : MOD ALTERED AROUND JOINTS AND VEINS; Comments : BASALT IS N5 MEDIUM GRAY; Replacement: GREENISH BLACK CRYSTALS MAY BE REPLACED OL OR AUGITE PHENOS; Leg : 61 Top/Bottom Interval(mm): 0/1500 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 1046.00 Core: 90 Top of Core Depth (m) : 1041.50 Sect: 3 Top of Section Depth(m): 1044.50 LITHOLOGY: MEDIUM-GRAINED BASALT; Piece No. : PCE 1A (2-15) 1B (14-27), 1C (27-36), 1D (35-45), 1E (45-55), 1F (56-65), 1G (65-75), 1H (74-90), 1I (90-95), 2A (97-119), 2B (117-130), 3 (130-142), 4 (144-147); Texture : MEDIUM-GRAINED; Structure : FAIRLY HOMOGENEOUS THROUGHOUT SECTION, SOME VEINS FILLED WITH ZEOLITE+CHLORITE(?)+RARE PYRITE, MAJOR VEINS IN PCES 1B+1E+2A; Alteration : MOD ALTERED PARTICULARLY ALONG JOINTS; Comments : BASALT IS N6 MEDIUM GRAY, DARK SEGREGATION(?) IN PCE 1G; Replacement: ZEOLITE CHLORITE ID UNCERTAIN; PYRITE RARE; Leg : 61 Top/Bottom Interval(mm): 0/1440 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 1047.44 Core: 90 Top of Core Depth (m) : 1041.50 Sect: 4 Top of Section Depth(m): 1046.00 LITHOLOGY: MEDIUM-GRAINED BASALT; Piece No. : PCE 1 (2-10), 2 (11-15), 3 (15-22), 4A (23-35), 4B (35-51), 4C (51-70), 4D (70-83), 4E (82-105), 5 (107-110), 6 (111-137); Texture : MEDIUM-GRAINED, FAIRLY HOMOGENEOUS IN GRAIN SIZE THROUGHOUT SECTION; Structure : FRACTURED WITH VEINS FILLED WITH ZEOLITES+ CHLORITE(?)+PYRITE, PYRITE VEIN IN PCE 4A-4C, ZEOLITE VEINS IN PCE 5; Alteration : MOD Comments : BASALT COLOR IS N6 GRAY; Replacement: ZEOLITE CHLORITE ID UNCERTAIN; PYRITE Leg : 61 Top/Bottom Interval(mm): 0/ 930 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 1048.43 Core: 90 Top of Core Depth (m) : 1041.50 Sect: 5 Top of Section Depth(m): 1047.50 LITHOLOGY: MEDIUM-GRAINED BASALT; Piece No. : PCE 1A (3-22), 1B (21-30), 1C (30-36), 2 (37-45), 3 (45-52), 4 (53-65), 5 (66-71), 6 (72-75), 7 (77-80), 8 (82-85), 9 (88-91); Texture : MEDIUM-GRAINED THROUGHOUT; Structure : FRACTURED-HORIZONTAL JOINTS IN PCES 3+4, VEINS ARE PRESENT IN PCE 1; Alteration : MOD; Comments : ENTIRE CORE 90 SEEMS TO BE IN SAME FLOW OR INTRUSIVE UNIT, BASALT COLOR IS N6 MEDIUM GRAY; Leg : 61 Top/Bottom Interval(mm): 0/ 100 Analyst: Vallier, T. Hole: 462A Sample Midpoint (m) : 1050.60 Core: 91 Top of Core Depth (m) : 1050.50 Sect: 1 Top of Section Depth(m): 1050.50 LITHOLOGY: MEDIUM-GRAINED BASALT; Piece No. : PCE 1 (3-7); Texture : MEDIUM-GRAINED; Structure : FRACTURED; Alteration : MOD; Comments : BASALT COLOR IS N6, ONLY RECOVERY FROM CORE 91; Leg : 61 Top/Bottom Interval(mm): 0/ 100 Analyst: Seifert, K. Hole: 462A Sample Midpoint (m) : 1059.60 Core: 92 Top of Core Depth (m) : 1059.50 Sect: 1 Top of Section Depth(m): 1059.50 LITHOLOGY: DIABASE; Piece No. : PCE 1 (3-8); Texture : MEDIUM-GRAINED; Structure : FEW SUBPARALLEL FRACTURES; Alteration : MOD; Comments : DIABASE COLOR IS N5 GRAY, ONLY ONE PCE RECOVERED FROM CORE 92; Leg : 61 Top/Bottom Interval(mm): 0/1480 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 625.48 Core: B 1 Top of Core Depth (m) : 624.00 Sect: 1 Top of Section Depth(m): 624.00 LITHOLOGY: MASSIVE BASALT SILL (DOLERITE); BIT CORE; Piece No. : PCE NO PCE NUMBERS ASSIGNED; Structure : MASSIVE BASALT SILL, VEIN MATERIAL NOT VISIBLE TO Texture : THE UNAIDED EYE; RELATIVELY COARSE-GRAINED DOLERITIC ROCK, IN INTERVAL (20-30) IS PCE WITH THE COARSEST GRAIN SIZE, FEW (<1%) CPX PHENOS (1MM IN SIZE); Alteration : SLIGHTLY ALTERATION IS NOT VISIBLE TO THE UNAIDED EYE; Comments : NONE OF THE PCES ARE ORIENTED AND THEIR RELATIVE STRATIGRAPHIC POSITION IS NOT KNOWN EITHER; Phenocrysts: CLINOPYROXENE ( <1%) Size(mm): 1 FEW CPX PHENOS; Leg : 61 Top/Bottom Interval(mm): 0/ 200 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 625.70 Core: B 1 Top of Core Depth (m) : 624.00 Sect: 2 Top of Section Depth(m): 625.50 LITHOLOGY: CPX SPARSELY PHYRIC BASALT; DOLERITE; CORE CATCHER SAMPLE OF BIT CORE; Piece No. : PCE NO PCE NUMBERS ASSIGNED; Structure : MASSIVE BASALT SILL, CALCITE-CHLORITE VEINS; Texture : SPARSELY PHYRIC; Phenocrysts: CLINOPYROXENE ( 1%) Size(mm): 1 Replacement: CALCITE IN VEINS; CHLORITE IN VEINS; Leg : 61 Top/Bottom Interval(mm): 0/1070 Analyst: Tokuyama, H. Hole: 462A Sample Midpoint (m) : 691.07 Core: B 2 Top of Core Depth (m) : 690.00 Sect: 1 Top of Section Depth(m): 690.00 LITHOLOGY: CPX-PLAG MICROPHYRIC BASALT (DOLERITE SILL); Piece No. : PCE 1 (1-6), 2 (10-16), 3 (20-27), 4 (30-37), 5 (40-45), 6 (48-51), 7 (56-60), 8 (64-78), 9 (80-92), 10 (95-105); Structure : DOLERITE SILL WITH CHLORITE VEINS; Texture : GRAINED AND HOLOPILITIC, PCES 4-7 ARE MEDIUM-GRAINED AND ARE INTERSERTAL, PCE 8+10 ARE MEDIUM TO SLIGHTLY COARSE-GRAINED AND ARE INTERSERTAL TO INTERGRANULAR; Alteration : SLIGHTLY; Comments : ORIENTATION AND STRATIGRAPHIC ORDER ARE NOT KNOWN FOR THE PCES RECOVERED; Phenocrysts: CLINOPYROXENE MICROPHENOS; PLAGIOCLASE MICROPHENOS; Groundmass : CLINOPYROXENE MICROLITES; PLAGIOCLASE MICROLITES; MAGNETITE MICROLITES, IN ADDITION PCES 1+2 ALSO HAVE MICROLITES OF PLAG; Replacement: CHLORITE Leg : 61 Top/Bottom Interval(mm): 0/ 300 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 946.30 Core: X 1 Top of Core Depth (m) : 946.00 Sect: 1 Top of Section Depth(m): 946.00 LITHOLOGY: BASALT AND DIABASE FRAGMENTS; Piece No. : PCE 1 (0-30); Texture : 9 FRAGMENTS OF BASALTIC ROCK, 8 ARE MEDIUM-GRAINED DIABASE SIMILAR TO THAT OF CORE 73 AND ONE PCE IS FINE-GRAINED BASALT SIMILAR TO THAT OF CORE 72; Comments : NONE OF THESE PCES HAVE ORIENTATION OR STRATIGRAPHIC POSITION, THEY WERE COLLECTED IN TOOL FISHING OPERATION; Leg : 61 Top/Bottom Interval(mm): 30/0430 Analyst: Robinson, P.T. Hole: 462A Sample Midpoint (m) : 946.43 Core: X 1 Top of Core Depth (m) : 946.00 Sect: 1 Top of Section Depth(m): 946.03 LITHOLOGY: SEDIMENTARY ROCK; Piece No. : PCE 2 (30-43); Comments : SMALL (0.5-2CM) PCES OF SEDIMENTARY ROCK; |
Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]
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