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Core Data from the Deep Sea Drilling Project


Leg : 70    Top/Bottom Interval(mm):    0/ 320  Analyst: Schrader, E.L.
Hole: 506G  Sample Midpoint (m)    :    29.82
Core:   2   Top of Core Depth (m)  :    29.50
Sect:  1    Top of Section Depth(m):    29.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 1 (2-5), 3 (17-22), 4 (24-32);

  Texture    : APHYRIC, PCE 1 IS MEDIUM-GRAINED, PCE 3 IS FINE-
               GRAINED, PCE 4 IS FINE-GRAINED TO HOLOXTALLINE,
               CHILLED MARGIN PRESENT IN PCE 4;

  Alteration : FRESH
               IN PCE 1 DUST OF GREEN AND BLUE SECONDARY MINERAL
               (CLAY?) COATING UNCUT SURFACES, IN PCE 3 UNCUT
               SURFACES ARE COATED WITH DUST OF SECONDARY CLAY
               MINERAL;

  Comments   : CHILLED MARGIN APPEARS TO BE THE BOTTOM OF A
               COOLING UNIT (UNIT 1?);

  Vesicles   : Size(mm):     <0.5   Percent:
               IN PCE 1 PINPOINT VESICLES EVENLY DISTRIBUTED
               AND EMPTY;

               Location:            Filling: CLAY
               IN PCE 3 VESICLES ARE SCATTERED THROUGHOUT,
               VESICLES NEAR RIMS ARE FILLED WITH LIGHT BLUE
               CLAY-INTERIOR VESICLES ARE EMPTY;

               Size(mm):    0.5-1   Percent:
               Location:            Filling: CLAY
               IN PCE 4 VESICLES ARE SCATTERED THROUGHOUT,
               VESICLES NEAREST QUENCHED MARGIN ARE FILLED WITH
               BLUE CLAY, INTERIOR VESICLES ARE MOSTLY CLEAN;

  Replacement: CLAY MINERALS
               BLUE;


Leg : 70    Top/Bottom Interval(mm):  180/ 250  Analyst: Schrader, E.L.
Hole: 506G  Sample Midpoint (m)    :    29.75
Core:   2   Top of Core Depth (m)  :    29.50
Sect:  1    Top of Section Depth(m):    29.68

LITHOLOGY: OL-PLAG SPARSELY PHYRIC BASALT;

  Piece No.  : PCE 2 (18-25);

  Texture    : VERY SPARSELY PHYRIC, MEDIUM-GRAINED;

  Alteration : FRESH;

  Comments   : COOLING UNIT 1;

  Vesicles   : Size(mm):   <0.5-1   Percent:
               SCATTERED THROUGHOUT, VESICLES GRADE TO VUGS, 2
               VESICLES CONTAIN VERY GLASSY SECONDARY MINERALS
               OR PRIMARY SILICATES CRYSTALLIZED WITHIN,
               REMAINING VESICLES CLEAN;

  Phenocrysts: OLIVINE

               PLAGIOCLASE

  Replacement: SILICATE
               CRYSTALLIZED IN VESICLES;


Leg : 70    Top/Bottom Interval(mm):  360/ 610  Analyst: Schrader, E.L.
Hole: 506G  Sample Midpoint (m)    :    30.11
Core:   2   Top of Core Depth (m)  :    29.50
Sect:  1    Top of Section Depth(m):    29.86

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 5 (36-44), 7 (55-61);

  Texture    : APHYRIC, PCE 5 IS FINE-GRAINED, PCE 7 IS MEDIUM-
               GRAINED, ON PCE 7 1MM RIND ON ONE SIDE;

  Structure  : CRACK IN PCE 5-FRESH;

  Alteration : FRESH
               IN PCE 7 MINOR COATING OF SECONDARY CLAY ON ONE
               EXTERIOR SURFACE;

  Comments   : COOLING UNIT 2 (BART);

  Vesicles   : Size(mm):    0.5-1   Percent:
               Location:            Filling: SILICATES
               IN PCE 5 SCATTERED VESICLES ARE EMPTY EXCEPT FOR
               PRIMARY SILICATES, IN PCE 7 PINPOINT VESICLES
               ARE SCATTERED THROUGHOUT;


Leg : 70    Top/Bottom Interval(mm):  470/ 700  Analyst: Schrader, E.L.
Hole: 506G  Sample Midpoint (m)    :    30.20
Core:   2   Top of Core Depth (m)  :    29.50
Sect:  1    Top of Section Depth(m):    29.97

LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;

  Piece No.  : PCE 6 (47-52), 8 (63-70);

  Texture    : VERY SPARSELY PHYRIC, PCE 6 IS FINE-GRAINED, PCE
               7 IS VERY FINE-GRAINED;

  Alteration : VERY THIN ALTERATION RIND IS PRESENT IN PCE 6,
               FAINT ALTERATION RIND IS PRESENT IN PCE 8;

  Comments   : COOLING UNIT 2;

  Vesicles   :
               Location:            Filling: CLAY
               IN PCE 6 VESICLES NEAR RIM COATED WITH SECONDARY
               BLUE CLAY, IN PCE 8 SOME VESICLES IN RIND COATED
               BY SECONDARY CLAY MINERAL, SOME VESICLES ON
               EXPOSED SURFACES FILLED WITH BLUE CLAY;

  Replacement: CLAY MINERALS
               BLUE CLAY IN VESICLES;


Leg : 70    Top/Bottom Interval(mm):  720/1270  Analyst: Schrader, E.L.
Hole: 506G  Sample Midpoint (m)    :    30.77
Core:   2   Top of Core Depth (m)  :    29.50
Sect:  1    Top of Section Depth(m):    30.22

LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;

  Piece No.  : PCE 9 (72-80), 11 (93-98), 13 (106-111),
               15 (120-126);

  Texture    : VERY SPARSELY PHYRIC, PCES 9+11 ARE VERY FINE-
               GRAINED, PCE 13 IS FINE-GRAINED, PCE 15 IS MEDIUM-
               GRAINED;

  Alteration : FRESH
               PCE 9 IS FRESH, UNCUT SURFACE PARTLY COATED WITH
               SECONDARY BLUE CLAY MINERAL;

  Comments   : COOLING UNIT 3?;

  Vesicles   : Size(mm):      0.5   Percent:
               ONE 0.5MM VESICLE IN PCE 9;

               Size(mm):     <0.1   Percent:
               Location:            Filling: CLAY
               MANY LITTLE VESICLES PARTLY COATED ON THE INSIDE
               WITH BLUE-GREEN CLAY;

               Size(mm):      0.5   Percent:
               PCE 11 IS VESICULAR AND EMPTY;

               Location:            Filling: CLAY
               IN PCE 17 VESICLES PARTLY COATED WITH BLUE CLAYS
               AND COATED OR FILLED WITH BROWNISH RED MATERIALS,
               PCE 15 IS VESICULAR-VESICLES ARE ALMOST EMPTY,
               TWO VESICLES ARE FILLED WITH GLASSY MINERALS;

  Phenocrysts: PLAGIOCLASE

  Replacement: CLAY MINERALS
               BLUE CLAY FILLING VESICLES;


Leg : 70    Top/Bottom Interval(mm):  820/1170  Analyst: Schrader, E.L.
Hole: 506G  Sample Midpoint (m)    :    30.67
Core:   2   Top of Core Depth (m)  :    29.50
Sect:  1    Top of Section Depth(m):    30.32

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 10 (82-90), 12 (100-103), 14 (113-117);

  Texture    : APHYRIC, PCE 10 IS VERY FINE-GRAINED, PCE 12 IS
               FINE-GRAINED, PCE 14 IS MEDIUM-GRAINED;

  Alteration : FRESH
               PCE 14 IS FRESH, ALTERATION RIM IN PCE 10;

  Comments   : COOLING UNIT 3;

  Vesicles   : Size(mm):      0.2   Percent:
               Location:            Filling: CALCITE,CLAY
               IN PCE 10 ONE VESICLE FILLED WITH CALCITE, PIN
               POINT VESICLES DISTRIBUTED-EMPTY IN FRESH PART,
               VESICLES IN ALTERATION RIM PARTLY FILLED WITH
               BLUE CLAY;

               Location:            Filling: CLAY
               PCE 12 IS VESICULAR, COATED WITH LIGHT BLUE TO
               DARK GREEN CLAYS AND BROWNISH RED MATERIAL, IN
               PCE 14 PINPOINT VESICLES EMPTY;

  Replacement: CALCITE

               CLAY MINERALS


    

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.

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