NOAA logo, National Centers for Environmental Information, National Oceanic and Atmospheric Administration NSF logo, National Science Foundation, Division of Ocean Sciences

Core Data from the Deep Sea Drilling Project


Leg : 60    Top/Bottom Interval(mm):    0/ 400  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   558.90
Core:  60   Top of Core Depth (m)  :   558.50
Sect:  1    Top of Section Depth(m):   558.50

LITHOLOGY: SEDIMENT;


Leg : 60    Top/Bottom Interval(mm):  400/1480  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   559.98
Core:  60   Top of Core Depth (m)  :   558.50
Sect:  1    Top of Section Depth(m):   558.90

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (40-52), 2 (53-60), 3 (62-66), 4 (69-71),
               5 (73-77), 6 (80-83), 7 (86-93), 8 (94-101),
               9 (103-110), 10 (113-117), 11 (120-130),
               12 (132-138), 13 (140-148);

  Texture    : APHYRIC, FINE TO MEDIUM GRAINED, NEARLY HOLOXTLN,
               MESOSTASIS ALTERED TO BROWN CLAY;

  Structure  : SOME CLAY ON EXTERIOR FRACTURE SURFACES IS PINK IN
               COLOR, CORE IS PART OF MASSIVE FLOW POSSIBLY 30
               METERS THICK;

  Alteration : MOD
               SOME SAMPLES VERY FRESH LOOKING;

  Comments   : COLOR IS GREENISH GREY (5Y5/1);

  Vesicles   : Size(mm):    0.1-3   Percent: 30-40
               Location:            Filling: CARB

  Replacement: CARBONATE
               AS VESICLE AND OUTER SURFACE COATING;

               CLAY MINERALS


Leg : 60    Top/Bottom Interval(mm):    0/ 990  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   560.99
Core:  60   Top of Core Depth (m)  :   558.50
Sect:  2    Top of Section Depth(m):   560.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-10), 2 (13-19), 3A (23-30), 3B (34-37),
               4 (40-43), 5 (47-48), 6A (52-56), 6B (58-64),
               6C (65-69), 7 (72-76), 8 (78-99);

  Texture    : APHYRIC, FINE TO MEDIUM GRAINED, INTERSERTAL,
               HOLOXTLN, MESOSTASIS ALTERED TO BROWN CLAY POSSIBLY
               THROUGH OXIDATION;

  Structure  : SOME CLAY ON EXTERIOR FRACTURE SURFACES PINK IN
               COLOR;

  Alteration : MOD;

  Comments   : GREENISH GREY (5Y5/1), CLAY DISCOLORATION IN PCE 3;

  Vesicles   : Size(mm):    0.1-2   Percent: 40-50
               Location:            Filling: CARB

  Replacement: CARBONATE
               AS VESICLE AND OUTER SURFACE COATING;

               CLAY MINERALS


Leg : 60    Top/Bottom Interval(mm):    0/1470  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   569.47
Core:  61   Top of Core Depth (m)  :   568.00
Sect:  1    Top of Section Depth(m):   568.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (1-12), 2 (15-23), 3 (26-32), 4 (35-40),
               5 (43-54), 6 (57-62), 7 (64-68), 8 (72-80),
               9 (83-90), 10 (94-107), 11 (110-117),
               12 (120-123), 13 (125-132), 14 (135-147);

  Texture    : APHYRIC, FINE TO MEDIUM GRAINED, NEARLY HOLOXTLN,
               MESOSTASIS ALTERED TO BROWN AND APPLE GREEN CLAY
               MINERALS;

  Structure  : MINOR VEINS OF YELLOW GREEN CLAY;

  Alteration : MOD
               ALTERATION RINDS IN SEVERAL PCES, ROCK HAS BEEN
               OXIDIZED;

  Comments   : BROWN TO YELLOW GREEN TO APPLE GREEN CLAYS PRESENT,
               SOME GREENISH GREY BASALT (5GY5/1);

  Vesicles   : Size(mm):    0.1-1   Percent: 20-30
               Location:            Filling: CARB

  Replacement: CARBONATE
               IN VESICLES AND AS COATINGS ON EXTERIOR SURFACES;

               CLAY MINERALS


Leg : 60    Top/Bottom Interval(mm):    0/ 950  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   570.45
Core:  61   Top of Core Depth (m)  :   568.00
Sect:  2    Top of Section Depth(m):   569.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (3-8), 2 (12-18), 3 (21-23), 4 (28-31),
               5 (35-39), 6 (42-48), 7 (53-62), 8 (64-73),
               9 (76-83), 10 (82-95);

  Texture    : APHYRIC, SIMILAR TO PREVIOUS SECTION;

  Alteration : MOD;

  Comments   : GENERALLY GREENER;

  Vesicles   : LESS VESICULAR THAN PREVIOUS SECTION, CARB AND
               CLAY.MIN FILL VESICLES;

  Replacement: CARBONATE
               IN VESICLES AND AS COATINGS ON EXTERIOR SURFACES;

               CLAY MINERALS


Leg : 60    Top/Bottom Interval(mm):    0/1250  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   578.75
Core:  62   Top of Core Depth (m)  :   577.50
Sect:  1    Top of Section Depth(m):   577.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (3-14), 2 (16-24), 3 (26-40), 4 (44-53),
               5 (56-57), 6 (65-71), 7 (73-81), 8 (84-87),
               9 (90-93), 10 (96-105), 11 (109-113), 12 (118-125);

  Texture    : APHYRIC, SIMILAR TO PREVIOUS SECTION, GRAIN SIZE
               CONSISTENT;

  Structure  : CLEAR TO BLACKISH GREEN CLAY ON EXTERIOR FRACTURE
               SURFACES;

  Alteration : MOD;

  Comments   : GREENISH GREY (5GY5/1) TO OLIVE GREY (5Y4/2) ON
               OXIDATION RINDS, ONE SMALL FRAGMENT OF ORANGE PINK
               SEDIMENT IN PCE 1;

  Replacement: CARBONATE

               CLAY MINERALS


Leg : 60    Top/Bottom Interval(mm):    0/ 840  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   587.84
Core:  63   Top of Core Depth (m)  :   587.00
Sect:  1    Top of Section Depth(m):   587.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (2-13), 2 (15-17), 3 (20-29), 4 (32-35),
               5 (36-45), 6 (47-54), 7 (56-61), 8 (63-68),
               9 (70-78), 10 (81-84);

  Texture    : APHYRIC, FINE TO MEDIUM GRAINED, FINER GRAINED THAN
               PREVIOUS CORE, LESS CLAY ALTERATION OF THE
               MESOSTASIS;

  Structure  : SOME GREENISH BLACK CLAYS COAT EXTERIOR SURFACES OF
               FRACTURES;

  Alteration : MOD;

  Comments   : PCE 1 CONSISTS OF PCES OF PINKISH ORANGE CLAYSTONE
               WHICH MAY BE DRILLING BRECCIA FROM ABOVE DURING
               DRILLING, GREENISH GREY CARB (5G4/1);

  Replacement: CARBONATE

               CLAY MINERALS


Leg : 60    Top/Bottom Interval(mm):    0/ 530  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   597.03
Core:  64   Top of Core Depth (m)  :   596.50
Sect:  1    Top of Section Depth(m):   596.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (1-13), 2 (17-38), 3 (42-47), 4 (50-53);

  Texture    : APHYRIC, FINE TO MEDIUM GRAINED, MESOSTASIS SLIGHTLY
               ALTERED;

  Structure  : GREENISH BLACK CLAY ON EXTERIOR SURFACES IN PCES
               3-4;

  Alteration : MOD;

  Comments   : SEVERAL PCES IN PCE 1 ARE SEDIMENTARY AND POSSIBLY
               REWORKED FROM UPPER PART OF HOLE, BASALT GREENISH
               GREY (5Y4/1), NOT OBVIOUSLY OXIDIZED;

  Vesicles   : Size(mm):    0.1-1   Percent: 20-30

  Replacement: CARBONATE
               NOT OBVIOUS;


Leg : 60    Top/Bottom Interval(mm):    0/1500  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   607.50
Core:  65   Top of Core Depth (m)  :   606.00
Sect:  1    Top of Section Depth(m):   606.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (1-3), 2 (7-9), 3 (11-16), 4 (18-21),
               5 (25-28), 6 (30-32), 7 (34-38), 8 (57-61),
               9 (72-85), 10A (86-91), 10B (92-97),
               11 (116-122), 12 (123-128), 13 (128-133);

  Texture    : APHYRIC, FINE GRAINED;

  Structure  : HIGHLY FRACTURED BASALT, EXTERIOR FRACTURE SURFACES
               GENERALLY COATED WITH GREENISH BLACK TO APPLE GREEN
               CLAY, PCE 7 AND SOME OF THE FRACTURED MATERIAL
               APPEARS TO BE A PILLOW RIND THAT IS HIGHLY FRACTURED
               AND CONTAINS ZEOLITES IN CAVITIES AND VEINS, CLAY
               CONTENT VERY HIGH IN FRACTURED MATERIAL;

  Alteration : EXT
               CLAY CONTENT VERY HIGH IN FRACTURED MATERIAL;

  Comments   : COLOR OLIVE BLACK (5Y2/1) TO DARK GREENISH GREY
               (5GY4/1);

  Vesicles   : Size(mm):    0.1-3   Percent: 10-40
               VESICLES GENERALLY LINED WITH GREEN CLAY, PCE 10
               HAS VERTICAL VESICLE TRAIN WITH VESICLES <3MM IN
               LENGTH, THEY ARE HIGH IN CLAY CONTENT AND ARE
               GREENISH GREY IN COLOR;

  Replacement: CARBONATE

               CLAY MINERALS

               ZEOLITE


Leg : 60    Top/Bottom Interval(mm):    0/ 180  Analyst: Meijer, A.
Hole: 459B  Sample Midpoint (m)    :   607.83
Core:  65   Top of Core Depth (m)  :   606.00
Sect: CC    Top of Section Depth(m):   607.75

LITHOLOGY: DRILLING FLOUR;

  Piece No.  : PCE 1 (3-18);

  Texture    : CONSISTS OF DRILLING FLOUR MADE UP OF GREENISH BLACK
               TO DARK GREENISH GREY BASALTIC MATERIAL;

  Alteration : ALMOST COMPLETELY ALTERED;


Leg : 60    Top/Bottom Interval(mm):    0/1500  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   617.00
Core:  66   Top of Core Depth (m)  :   615.50
Sect:  1    Top of Section Depth(m):   615.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-7), 2A (10-13), 2B (13-16), 3 (18-25),
               4A (28-31), 4B (32-48), 4C (51-60), 5 (62-65),
               6 (68-71), 7 (73-81), 8 (84-89), 9 (93-112),
               10 (113-122), 11A (124-126), 11B (127-134),
               11C (129-139), 11D (138-143), 12 (146-150);

  Texture    : APHYRIC, MEDIUM GRAINED, GRAIN SIZE IS UNIFORM
               THROUGHOUT, GREEN OR BROWN CLAYS FORM A MATRIX;

  Structure  : FRACTURE SURFACES AND SLICKENSIDES ARE PRESENT,
               FRACTURING IS MORE INTENSE AT THE BOTTOM OF THE
               SECTION FROM PCE 11A-12 ALTHOUGH THE ROCKS ARE
               SIMILAR;

  Alteration : EXT;
               ALMOST COMPLETELY ALTERED
               123-150CM;

  Comments   : DARK GREENISH GREY (5G4/1) TO GREENISH BLACK (5G2/1)
               BASALT, MINOR PATCHES SLIGHTLY BROWN COLOR ON PCES
               3-4A (5YR4/1), FRACTURE SURFACES ARE DARK GREENISH
               BLACK (5GY2/1), SLICKENSIDES ARE PALE GREY AND
               WHITE;

  Vesicles   : Size(mm):      1-5   Percent:
               Location:            Filling: CLAY.MIN
               VESICULARITY GREATEST IN PCES 4A+4C-7;

  Replacement: CLAY MINERALS

               CARBONATE                 (    0%)


Leg : 60    Top/Bottom Interval(mm):    0/1500  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   618.50
Core:  66   Top of Core Depth (m)  :   615.50
Sect:  2    Top of Section Depth(m):   617.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-41), 2 (44-51), 3 (52-70), 4 (72-82),
               5 (84-89), 6A (91-100), 6B (102-106), 6C (102-105),
               7 (107-111), 8A (116-121), 8B (123-128),
               8C (130-136), 8D (135-144), 8E (144-150);

  Texture    : APHYRIC, FRAGMENTS ARE MEDIUM GRAINED, PCES 8A-E ARE
               SLIGHTLY MORE COARSE GRAINED THAN ROCKS HIGHER IN
               THE SECTION;

  Structure  : PCES 1-2+4-5 ARE HIGHLY SHEARED BASALT WITH
               SLICKENSIDES PRESENT;

  Alteration : EXT;
               ALMOST COMPLETELY ALTERED
               0-50CM;

  Comments   : PCES 1-2 ARE DARK GREENISH GREY (5G4/1), PCES
               THROUGH 7 CONTAIN ABUNDANT CLAYS WHICH MAKE THEM
               GREENER THAN THE ROCKS ABOVE OR BELOW, ALTERATION IN
               PCES 8A-E HAS PRODUCED A BROWNISH GREY (5YR4/1)
               STAINING, SLICKENSIDES RANGE FROM WHITE TO GREENISH
               BLACK;

  Vesicles   : Size(mm):            Percent:     2
               PCES 1-2, PCE 3 CONTAINS SOME LARGE VESICLES
               ENCRUSTED WITH GREEN CLAY.MIN;

  Replacement: CLAY MINERALS

               CARBONATE                 (    0%)


Leg : 60    Top/Bottom Interval(mm):    0/ 450  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   618.95
Core:  66   Top of Core Depth (m)  :   615.50
Sect:  3    Top of Section Depth(m):   618.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-10), 2 (13-18), 3 (22-26), 4 (28-36),
               5 (38-45);

  Texture    : APHYRIC, ROCK FRAGMENTS ARE MEDIUM GRAINED BUT
               SLIGHTLY MORE COARSE GRAINED THAN THE ROCKS HIGHER
               IN THE CORE, PCES 4-5 ARE RUBBLY MATERIAL;

  Alteration : EXT;
               ALMOST COMPLETELY ALTERED
               37-45CM;

  Comments   : DARK GREENISH GREY MATRIX (5G4/1) WITH PLACES THAT
               IS STAINED BROWNISH GREY (5YR4/1);

  Vesicles   : Size(mm):            Percent:     5


Leg : 60    Top/Bottom Interval(mm):    0/1470  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   626.47
Core:  67   Top of Core Depth (m)  :   625.00
Sect:  1    Top of Section Depth(m):   625.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-5), 2 (9-12), 3 (14-16), 4A (20-28),
               4B (29-30), 4C (30-37), 4D (35-40), 4E (41-44),
               5 (46-51), 6A (54-66), 6B (67-79), 7 (81-91),
               8A (93-104), 8B (105-112), 8C (112-121),
               8D (121-128), 8E (129-139), 8F (140-142),
               9 (145-147);

  Texture    : APHYRIC, PCE 1 IS PILLOW BASALT RIND WITH THE
               FORMERLY GLASSY MARGIN FRACTURED AND TOTALLY
               REPLACED BY CHLORITE AND CLAYS, PCES 2-4E+8A-9
               ARE MEDIUM GRAINED;

  Structure  : SURFACE OF ALTERED GLASS IN PCE 1 IS SLICKENSIDED,
               PATCHES AND BANDS OF BROWNISH GREY DISCOLORATION
               THROUGHOUT THE FRAGMENTS BUT PARTICULARLY NEAR
               CRACKS AND FRACTURES, FRACTURE SURFACES IN THE ROCKS
               SHOW WHITE TO DARK GREENISH BLACK MINERAL
               ENCRUSTATION AND SOME OF THE MATERIAL IS
               SLICKENSIDED;

  Alteration : EXT;
               ALMOST COMPLETELY ALTERED
               52-90CM;

  Comments   : DISCOLORATION OF BROWNISH GREY (5YR4/1), FRACTURES
               ARE DARK GREENISH BLACK (5GY2/1);

  Vesicles   : Size(mm):            Percent:    10
               PCES 2-4E, PCES 8A-9 ARE NON-VESICULAR, GREEN
               CLAYS FORM VESICLE ENCRUSTATION AND OCCUR
               THROUGHOUT MATRIX;

  Replacement: CLAY MINERALS

               CHLORITE


Leg : 60    Top/Bottom Interval(mm):    0/1090  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   627.59
Core:  67   Top of Core Depth (m)  :   625.00
Sect:  2    Top of Section Depth(m):   626.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1A (3-7), 1B (8-14), 2 (16-29), 3 (30-36),
               4 (38-45), 5 (48-54), 6 (57-63), 7 (65-74),
               8 (76-82), 9 (85-91), 10A (93-102), 10B (103-109);

  Texture    : APHYRIC, ROCK FRAGMENTS SHOW A SLIGHT COARSENING OF
               GRAIN SIZE FROM MEDIUM TO COARSER MEDIUM GRAINED
               FROM TOP TO BOTTOM OF THE SECTION, PCE 9 IS A NUMBER
               OF BASALT PEBBLES AND GREEN CLAY;

  Structure  : PCE 5 SHOWS A CONTACT BETWEEN ALTERED BASALT AND A
               FRACTURE FILLING OR MORE HIGHLY ALTERED BASALTIC
               MATERIAL;

  Alteration : EXT;
               ALMOST COMPLETELY ALTERED
               PCE 9;

  Comments   : BASALT IS DARK GREENISH GREY (5G4/1), OCCASIONAL
               PATCHES OF BROWNISH GREY (5YR4/1) TO MOD YELLOWISH
               BROWN (10YR5/4) INDICATE DIFFERENT KINDS OF
               ALTERATION;

  Vesicles   : Size(mm):            Percent:     1

  Replacement: CLAY MINERALS


Leg : 60    Top/Bottom Interval(mm):    0/ 640  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   635.14
Core:  68   Top of Core Depth (m)  :   634.50
Sect:  1    Top of Section Depth(m):   634.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (2-16), 2 (19-25), 3 (28-42), 4A (45-47),
               4B (48-54), 5 (58-64);

  Texture    : APHYRIC, COARSE TO MEDIUM GRAINED, PCE 2 IS MEDIUM
               GRAINED;

  Structure  : PCES 3-5 SHOW SOME FRACTURING, PCE 4A SHOWS
               SLICKENSIDES;

  Alteration : EXT;

  Comments   : PCE 2 IS SLIGHTLY BROWNER THAN PCE 1 OR THE OTHER
               FRAGMENTS IN THIS SECTION;

  Vesicles   : Size(mm):            Percent:    20
               Location:            Filling: CLAY.MIN
               GREEN CLAY ENCRUSTATION IN PCE 1;

               Size(mm):            Percent:    10
               Location:            Filling: CLAY.MIN
               PCE 2, GREEN CLAYS ALSO;

               Size(mm):            Percent:    <5
               PCES 3-5;

  Replacement: CLAY MINERALS
               REPLACING MATRIX MINERALS;


Leg : 60    Top/Bottom Interval(mm):    0/1500  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   645.50
Core:  69   Top of Core Depth (m)  :   644.00
Sect:  1    Top of Section Depth(m):   644.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-6), 2 (10-13), 3 (17-19), 4 (22-25),
               5 (27-39), 6 (42-50), 7 (53-55), 8 (59-61),
               9 (63-66), 10 (69-72), 11 (75-80), 12 (82-88),
               13 (91-95), 14 (97-105), 15 (108-111), 16 (114-119),
               17 (122-130), 18 (133-136), 19 (138-142),
               20 (144-150);

  Texture    : APHYRIC, FINE GRAINED, PCE 16 IS BRECCIATED GLASSY
               FRAGMENTS SET IN A FRIABLE MATRIX WITH MORE COARSE
               GRAINED AND VESICULAR FRAGMENTS INCLUDED IN THE
               MATRIX AS IN PCE 17;

  Alteration : EXT;
               ALMOST COMPLETELY ALTERED
               PCES 16 & 17;

  Comments   : ROCKS ARE DARK GREENISH GREY (5GY4/1) WITH
               OCCASIONAL PCES AND PATCHES OF OLIVE GREY (5Y4/1)
               ALTERATION, MATRIX IN PCE 16 IS GREENISH BLACK
               (5G2/1) TO DARK YELLOWISH BROWN (10YR4/2);

  Vesicles   : Size(mm):       <3   Percent:
               Location:            Filling:
               Shape   : SPHERICAL
               PCES 1-5, PCES 6-15 SHOW SMALLER VESICLES WHICH
               OCCASIONALLY OCCUR IN TRAINS SURROUNDED BY
               DARKER FINER GRAINED MATRIX;


Leg : 60    Top/Bottom Interval(mm):    0/1400  Analyst: Sharaskin, A.
Hole: 459B  Sample Midpoint (m)    :   646.90
Core:  69   Top of Core Depth (m)  :   644.00
Sect:  2    Top of Section Depth(m):   645.50

LITHOLOGY: BASALTIC BRECCIA;

  Piece No.  : PCE 1 (4-16), 2 (19-23), 3A (25-32), 3B (33-36),
               3C (37-42), 4 (45-48), 5 (52-56), 6 (59-63),
               7 (65-69), 8 (72-75), 9 (77-90), 10 (92-96),
               11 (98-105), 12 (106-108), 13 (112-115),
               14 (117-119), 15 (122-130);

  Texture    : APHYRIC, MEDIUM GRAINED, PCES 1+9+11 ARE BASALTIC
               MYLONITES, PCES 3A-C ARE BRECCIAS WITH ANGULAR AND
               SUBANGULAR FRAGMENTS OF BASALTS CEMENTED BY VERY
               FINE GRAINED GREENISH BLACK MATRIX, CEMENTATION IS
               WEAK AND BRECCIAS CAN BE EASILY BROKEN INTO SEPARATE
               PCES, ALL OTHER PCES ARE MORE MASSIVE, THEY ARE JUST
               LARGE FRAGMENTS OF THE BRECCIA;

  Structure  : PCES 1+9+11 CONSIST OF SMALL SLICKENSIDED FRAGMENTS
               OF ALTERED AND SHEARED GREENISH BLACK MYLONITIC
               MATERIAL, PCES 3A-C WHEN BROKEN REVEAL SLICKENSIDED
               SURFACES, PCES 10+15 HAVE THIN VEINS OF CARB AND
               ZEOLITE(<1MM);

  Alteration : EXT
               PCES 2-3C, 7, 10;
               ALMOST COMPLETELY ALTERED
               PCES 1, 9, 11-14;
               MOD
               PCES 4-6, 8, 15;

  Comments   : BASALT IS DARK GREENISH GREY (5G4/1);

  Vesicles   : Size(mm):    0.3-2   Percent:

               Size(mm):      5-8   Percent:
               Location:            Filling:
               Shape   : SPHERICAL
               PCES 10+15;

  Replacement: CARBONATE

               ZEOLITE


Leg : 60    Top/Bottom Interval(mm):    0/ 970  Analyst: Sharaskin, A.
Hole: 459B  Sample Midpoint (m)    :   647.97
Core:  69   Top of Core Depth (m)  :   644.00
Sect:  3    Top of Section Depth(m):   647.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (2-5), 2 (9-12), 3 (15-26), 4 (29-34),
               5 (36-45), 6 (48-71), 7 (74-85), 8 (87-97);

  Texture    : APHYRIC, PCES 1+2+4+6+7 ARE MEDIUM GRAINED VESICULAR
               BASALT SIMILAR TO ROCKS OF PREVIOUS SECTION, THESE
               ROCKS ARE SEPARATED FROM ONE ANOTHER BY MYLONITIC
               ZONES IN PCES 3+5+8 AND THE END OF 6;

  Structure  : SLICKENSIDES ARE OBSERVED ON BASALT PCES AND ON
               MORE DENSE SMALL FRAGMENTS WITHIN THE MYLONITE MASS;

  Alteration : EXT
               PCES 1-2, 4, 6, 7;
               ALMOST COMPLETELY ALTERED
               PCES 3, 5, 8, 56-72CM;


Leg : 60    Top/Bottom Interval(mm):    0/1490  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   654.99
Core:  70   Top of Core Depth (m)  :   653.50
Sect:  1    Top of Section Depth(m):   653.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-6), 2A (8-15), 2B (10-14), 3 (19-29),
               4 (32-38), 5 (40-52), 6 (55-90), 7 (93-113),
               8 (115-130), 9 (132-139), 10 (143-149);

  Texture    : APHYRIC, FINE GRAINED, GRAIN SIZE IN PCE 5 IS FINER
               THAN IN PCES 1-4, PCE 6 IS A BROKEN FRAGMENT OF
               BRECCIATED AND HIGHLY FRACTURED BASALT WHICH IS FINE
               GRAINED AND APHYRIC AS THE BASALT HIGHER IN THE CORE
               BUT IS MORE SEVERELY ALTERED;

  Structure  : PCE 6 IS HIGHLY FRACTURED WITH FRACTURE SURFACES
               HAVING SLICKENSIDES ON THE LOWER PORTION OF THIS
               INTERVAL, PCES 7-10 ARE HIGHLY FRACTURED AND SHEARED
               WITH SLICKENSIDES PREVALENT;

  Alteration : EXT
               PCES 1-5;
               ALMOST COMPLETELY ALTERED
               PCES 6-10;

  Comments   : BASALT IN PCES 1-5 IS BLUISH GREY (5B5/1) WITH
               DIFFUSE PATCHES OF MOD YELLOWISH BROWN (10YR5/4)
               AND CONCENTRATION OF THE SAME COLOR ABOUT FRACTURES
               IN THE ROCK, PCE 6 IS MUCH DARKER GREENISH BLACK
               (5G2/1) WITH SOME PORTIONS BEING GREENER (5GY2/1);
               THERE IS A SMALL AMOUNT OF GREENISH BLACK SEDIMENT
               IN PCE 4 (5G2/1);

  Vesicles   : Size(mm):       <1   Percent:  5-10
               PCES 1-4;

               Size(mm):       <2   Percent:
               PCE 5;


Leg : 60    Top/Bottom Interval(mm):    0/ 550  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   655.55
Core:  70   Top of Core Depth (m)  :   653.50
Sect:  2    Top of Section Depth(m):   655.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-28), 2 (30-55);

  Texture    : APHYRIC, PCE 1 IS APHYRIC FINE GRAINED BASALT MADE
               OF VERY FRIABLE MATERIAL, PCE 2 IS RUBBLE OF
               BRECCIATED BASALT;

  Structure  : PCE 1 IS SHEARED AND SLICKENSIDES ARE ABUNDANT
               THROUGHOUT THE SECTION, PCE 2 SHOWS FEWER
               SLICKENSIDES AND LESS EVIDENCE OF SHEARING;

  Alteration : ALMOST COMPLETELY ALTERED;

  Comments   : PCE 1 IS OLIVE BLACK (5Y2/1) TO GREENISH BLACK
               (5GY2/1);


Leg : 60    Top/Bottom Interval(mm):    0/1500  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   664.50
Core:  71   Top of Core Depth (m)  :   663.00
Sect:  1    Top of Section Depth(m):   663.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (5-8), 2 (11-18), 3 (21-23), 4 (28-32),
               5 (34-44), 6A (46-52), 6B (52-59), 6C (60-70),
               6D (70-83), 7 (86-124), 8 (128-150);

  Texture    : APHYRIC, FINE GRAINED;

  Structure  : PCES 6-7 SHOW SHEARED AND SLICKENSIDED SURFACES
               ALONG FRACTURES;

  Alteration : EXT;

  Comments   : PCES 1-5 ARE DARK GREENISH GREY (5G4/1) WITH LARGE
               PATCHES OF OLIVE GREY DISCOLORATION;

  Vesicles   : Size(mm):       <1   Percent:    10
               PCES 1-5, VESICLES ARE FILLED WITH GREEN OR BROWN
               SECONDARY MINERALS WHICH ARE MOST LIKELY CLAYS,
               VESICLES OCCUR IN TRAINS SURROUNDED BY DARKER
               FINE GRAINED MATRIX, PCES 6-7 SHOW SIMILAR
               VESICULATION;

  Replacement: CLAY MINERALS


Leg : 60    Top/Bottom Interval(mm):    0/1470  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   665.97
Core:  71   Top of Core Depth (m)  :   663.00
Sect:  2    Top of Section Depth(m):   664.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-147);

  Texture    : APHYRIC, HIGHLY FRACTURED FRAGMENTS, NO APPRECIABLE
               CHANGE IN GRAIN SIZE THROUGHOUT SECTION;

  Structure  : FRAGMENTS IN LOWER PORTION ARE CONSIDERABLY MORE
               FRACTURED AND SHOW GREATER NUMBER OF SLICKENSIDED
               SURFACES, VEIN FILLING IN THE FRAGMENTS OF THE UPPER
               15CM IS GREENISH BLACK TO WHITE, DISCOLORATION
               AROUND FRACTURED AREAS;

  Alteration : EXT;

  Comments   : VEIN FILLING IS GREENISH BLACK (5G2/1), FRAGMENTS
               ARE DARK GREENISH GREY (5GY4/1), COLOR OF THE
               FRAGMENTS IS ESSENTIALLY UNIFORM THROUGHOUT THE
               REMAINDER OF THE SECTION, A FEW REGIONS OF DARK
               YELLOWISH BROWN (10YR4/2) AROUND FRACTURES AT 128CM,
               PCES SO FRACTURED THEY WERE NOT REMOVED FROM LINER
               AND NUMBERED;

  Vesicles   : Size(mm):       <1   Percent:
               VESICLES AND VESICLE TRAINS ALIGNED PERPENDICULAR
               TO THE CORE;


Leg : 60    Top/Bottom Interval(mm):    0/1500  Analyst: Fryer, P.
Hole: 459B  Sample Midpoint (m)    :   674.00
Core:  72   Top of Core Depth (m)  :   672.50
Sect:  1    Top of Section Depth(m):   672.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (4-150);

  Texture    : APHYRIC, FINE GRAINED, END OF THE SECTION IS
               BASALTIC BRECCIA WITH MYLONITIZED SECTIONS;

  Structure  : ROCKS ARE INTENSIVELY FRACTURED AND EASILY SPLIT
               ALONG FRACTURES REVEALING SLICKENSIDED SURFACES,
               CONTAINS IRREGULAR VEINS FILLED WITH GREENISH BLACK
               CLAY AND CARB NEAR 74-85CM;

  Alteration : EXT
               45-120CM;
               ALMOST COMPLETELY ALTERED
               0-45CM, 120-150CM;

  Comments   : BASALT IS DARK GREENISH GREY TO GREENISH BLACK,
               UPPER PORTION (3-50CM) AND LOWER (120-150CM) IS
               LIGHT OLIVE GREY IN COLOR DUE TO THE PRESENCE OF
               FE.HYDRX, A PATCH OF THIS COLOR IS ALSO FOUND NEAR
               74-85CM, BASALTIC BRECCIA NEAR END OF SECTION IS
               MYLONITIZED TO OLIVE GREY WITH BLUISH GREEN GREY
               CEMENT;

  Vesicles   : Size(mm):       <1   Percent:    20

               Size(mm):      2-6   Percent:
               RARE AND CONCENTRATED NEAR UPPER PART OF SECTION
               FROM 5-45CM, SOME OF THEM ARE ENCRUSTED WITH
               BLUISH GREEN GREY CLAY MINERAL WHILE OTHERS ARE
               ABSOLUTELY EMPTY;

  Replacement: CLAY MINERALS

               CARBONATE

               FERROUS HYDROX MINS


Leg : 60    Top/Bottom Interval(mm):    0/1500  Analyst: Sharaskin, A.
Hole: 459B  Sample Midpoint (m)    :   683.50
Core:  73   Top of Core Depth (m)  :   682.00
Sect:  1    Top of Section Depth(m):   682.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE NO PCE NUMBERS ASSIGNED;

  Texture    : APHYRIC, SECTION COULD BE DIVIDED INTO THREE PARTS,
               PART 1 IS FROM 0-74CM AND CONSISTS OF MEDIUM TO FINE
               GRAINED BASALTS, GRAIN SIZE DECREASES DOWNWARD AND
               ROCK BECOMES VERY FINE GRAINED BETWEEN 66-74CM, PART
               2 IS FROM 74-94CM AND IS A ZONE WHICH WAS ORIGINALLY
               A HYALOCLASTITE AND IS NOW BRECCIATED, ANGULAR
               GLASSY TO FINE GRAINED BASALTS ARE SET IN A SHEARED
               MASS PRODUCED AFTER DISINTEGRATED ROCK MATERIAL,
               PART 3 IS FROM 94-150CM AND IS FINE GRAINED BASALT
               WHICH IS HIGHLY ALTERED;

  Structure  : PART 1 IS SLIGHTLY FRACTURED, PART 2 IS HIGHLY
               FRACTURED AND SHEARED, PART 3 IS HIGHLY FRACTURED;

  Alteration : EXT;
               ALMOST COMPLETELY ALTERED
               74-150CM;

  Comments   : PART 1 IS DARK GREENISH GREY, PART 3 IS GREENISH
               BLACK, THE NEXT SECTION IS A PROLONGATION OF THIS
               ZONE;

  Vesicles   : Size(mm):       <1   Percent: 15-20
               PART 1;

               Size(mm):       <5   Percent:
               Location:            Filling:
               Shape   : ROUND
               LOWER HALF OF PART 1, PARTS 2-3 ARE ALSO
               VESICULAR;


Leg : 60    Top/Bottom Interval(mm):    0/1500  Analyst: Sharaskin, A.
Hole: 459B  Sample Midpoint (m)    :   685.00
Core:  73   Top of Core Depth (m)  :   682.00
Sect:  2    Top of Section Depth(m):   683.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE NO PCE NUMBERS ASSIGNED;

  Texture    : APHYRIC, SECTION IS A CONTINUOUS PROLONGATION OF
               SECTION 73-1, FINE GRAINED BASALTS SIMILAR TO PART 3
               OF THE PREVIOUS SECTION, ROCKS IN THIS SECTION ARE
               A LITTLE MORE COARSE GRAINED BUT STILL IN THE FINE
               GRAINED CATEGORY;

  Structure  : BASALTS ARE HIGHLY FRACTURED;

  Alteration : ALMOST COMPLETELY ALTERED
               ALTERATION SAME AS ZONE 3 OF CORE 73-1;
               OLIVE GREY ZONE OF ALTERATION FROM 128-137CM;

  Vesicles   : TRAINS OF SUBPARALLEL IRREGULAR VESICLES APPEAR
               WITHIN THE INTERVAL 90-110CM;


Leg : 60    Top/Bottom Interval(mm):    0/1380  Analyst: Sharaskin, A.
Hole: 459B  Sample Midpoint (m)    :   686.38
Core:  73   Top of Core Depth (m)  :   682.00
Sect:  3    Top of Section Depth(m):   685.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE NO PCE NUMBERS ASSIGNED;

  Texture    : APHYRIC, SECTION IS A CONTINUOUS PROLONGATION OF
               SECTION 73-2, FINE TO MEDIUM GRAINED BASALTS, MORE
               MASSIVE THAN IN PREVIOUS SECTIONS;

  Structure  : WELL DEVELOPED SYSTEM OF FRACTURES, ONE DIRECTION
               MAKES AN ANGLE OF 75 DEGREES TO THE LEFT EDGE OF THE
               LINER AND THE OTHER 150 DEGREES--THE ANGLE BETWEEN
               THE TWO DIRECTIONS IS 75-80 DEGREES;

  Alteration : ALMOST COMPLETELY ALTERED
               ALTERATION SAME AS CORE 73-2;

  Comments   : ZONE OF OLIVE GREY COLOR WHICH PROBABLY CONTAINS
               FE.HYDRX FROM 110-117CM, BASALT IS GREENISH GREY TO
               GREENISH BLACK;

  Vesicles   : Size(mm):    0.5-3   Percent:     5
               MORE ABUNDANT BELOW 60CM AND IN THE PCES BETWEEN
               75-110CM, ORIENTED PARALLEL TO THE FIRST DIRECTION
               OF THE FRACTURES, LOWERMOST PART CONTAINS SEPARATE
               PCES OF THESE ROCKS WITH TOTALLY DIFFERENT
               ORIENTATION OF VESICLE TRAINS;

  Replacement: FERROUS HYDROX MINS


    

Introduction


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]

These Web pages are from the Core Data from the Deep Sea Drilling Project Legs 1-96 CD-ROM produced in 1989 and modified in 2000 by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center (now part of the National Centers for Environmental Information), and collocated World Data Center for Marine Geology and Geophysics, Boulder (now part of the World Data Service for Geophysics). Data were compiled in cooperation with the U.S. Science Support Program, of the Joint Oceanographic Institutions, Inc. (now the Consortium for Ocean Leadership), and the U.S. National Science Foundation.

Please see NOAA's privacy and disclaimer information. Send questions or comments to mgg.info@noaa.gov.

Department of Commerce > NOAA > NESDIS > NCEI > doi:10.7289/V54M92G2