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Core Data from the Deep Sea Drilling Project


Leg : 70    Top/Bottom Interval(mm):    0/ 680  Analyst: Hubberten, H.-W.
Hole: 507B  Sample Midpoint (m)    :    31.68
Core:   1   Top of Core Depth (m)  :    31.00
Sect:  1    Top of Section Depth(m):    31.00

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 19 (1-5), 20 (7-13);

  Texture    : APHYRIC, FINE-GRAINED, 3 PLAG PHENOS IN PCE 19;

  Structure  : IN PCE 20 A SMALL FRACTURE IS COATED WITH BLUE CLAY;

  Alteration : FRESH
               WEATHERING RIM AT TWO SIDES;

  Comments   : COOLING UNIT SEPARATE FROM BELOW;

  Vesicles   :
               Location:            Filling: CLAY
               NUMEROUS VESICLES, EMPTY IN FRESH PART, IN THE
               WEATHERING RIM THEY ARE COATED WITH BLUE-GREEN
               CLAY OR FILLED WITH DARK GREEN MATERIAL;

  Phenocrysts: PLAGIOCLASE
               3 PLAG PHENOS IN PCE 19 OCCUR ON A SURFACE OF
               4:3CM;

  Replacement: CLAY MINERALS
               BLUE-GREEN CLAY IN VESICLES;


Leg : 70    Top/Bottom Interval(mm):  160/ 600  Analyst: Hubberten, H.-W.
Hole: 507B  Sample Midpoint (m)    :    31.60
Core:   1   Top of Core Depth (m)  :    31.00
Sect:  1    Top of Section Depth(m):    31.16

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 21 (16-24), 22 (24-28), 23 (29-35),
               24 (37-49), 25 (51-60);

  Texture    : APHYRIC, COARSE-GRAINED;

  Structure  : THIN VEINLET OF PYRITE IN THE LOWER HALF OF PCE 25;

  Alteration : FRESH
               IN PCE 25 PYRITE OCCURS AS THIN PATCHES ON THE
               OUTSIDE OF THE SAMPLE;

  Comments   : COOLING UNIT 2?, END OF COOLING UNIT AT PCE 25;

  Vesicles   : Size(mm):      2-3   Percent:
               Location:            Filling: CALCITE,ZEOLITE
               Shape   : ROUND TO

               Location:            Filling:
               Shape   : IRREGULAR
               NUMEROUS AMYGDULES WITH ROUND TO IRREGULAR
               SAMPLES, FILLED WITH CALCITE(?) AND WHITE-BLUE
               ZEOLITE(?) CRYSTALS, THE WALLS ARE COATED WITH
               BLUISH MATERIAL, IN PCE 25 VESICLES ARE ALMOST
               EMPTY;

  Replacement: CALCITE
               IN VESICLES, ID UNCERTAIN;

               ZEOLITE
               WHITE-BLUE ZEOLITE CRYSTALS, ID UNCERTAIN;

               PYRITE


Leg : 70    Top/Bottom Interval(mm):  630/ 680  Analyst: Hubberten, H.-W.
Hole: 507B  Sample Midpoint (m)    :    31.68
Core:   1   Top of Core Depth (m)  :    31.00
Sect:  1    Top of Section Depth(m):    31.63

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 26 (63-68);

  Texture    : APHYRIC, FINE-GRAINED, GLASSY RIMS ON TWO SIDES;

  Alteration : PYRITE OCCURS NEAR THE GLASSY SURFACE AND WITHIN
               THE SAMPLE, PARTLY OXIDIZED TO RED BROWN MATERIAL;

  Vesicles   : Size(mm):     <0.1   Percent:
               Location:            Filling: CLAY
               NUMEROUS SMALL VESICLES COATED WITH BLUE CLAY;

  Replacement: PYRITE

               CLAY MINERALS
               BLUE CLAY COATING VESICLES;


Leg : 70    Top/Bottom Interval(mm):  720/ 790  Analyst: Hubberten, H.-W.
Hole: 507B  Sample Midpoint (m)    :    31.79
Core:   1   Top of Core Depth (m)  :    31.00
Sect:  1    Top of Section Depth(m):    31.72

LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;

  Piece No.  : PCE 27 (72-79);

  Texture    : SPARSELY PHYRIC, FINE-GRAINED;

  Alteration : FRESH
               ALTERATION RIM AT TOP AND BOTTOM AND LEFT SIDE,
               RED BROWN GNDMASS ALTERATION IN THE WEATHERING
               RIM;

  Vesicles   : Size(mm):     <0.2   Percent:
               Location:            Filling: CLAY
               EMPTY IN THE FRESH PART AND COATED OR FILLED
               WITH BLUE CLAY IN THE WEATHERING RIM;

  Phenocrysts: PLAGIOCLASE

  Replacement: CLAY MINERALS
               BLUE CLAY COATS OR FILLS VESICLES IN WEATHERING
               RIM;


    

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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