Core Data from the Deep Sea Drilling Project

Leg : 63    Top/Bottom Interval(mm):  750/ 780  Describer: Shibata, T.
Hole: 470   Top of Core Depth(m)   :   161.50   Rock Type: IGNEOUS
Core:  18   Sample Midpoint(m)     :   163.76   Sect/Pc #:  2/PCE 1

ROCK = PLAG-OL SPARSELY PHYRIC BASALT;
       Texture: SPARSELY PORPHYRITIC,SUBVARIOLITIC GROUNDMASS;
       Where sampled: GLASSY MARGIN*

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):    0.2-0.3  Morphology: EUHEDRAL
             PSEUDOMORPHED--COMPLETELY ALTERED TO SERPENTINE +
             CLAY,MICROPHENOS;

             PLAGIOCLASE               (    3%)
             Size(mm):    0.2-1.0  Morphology: EUHEDRAL-SUBHEDRAL
             PHENOS + MICROPHENOS;

             SPINEL                    (   TR%)
             Morphology: SUBHEDRAL
             BROWN*

Groundmass - PLAGIOCLASE               (   30%)
             Morphology: SKELETAL,NEEDLES
             NEEDLE DIMENSIONS ARE <0.01 MM X 0.6 MM;

             CLINOPYROXENE             (   30%)
             Morphology: FEATHERY,PLUMOSE

             OPAQUE MINERALS           (    7%)

             MICROCRYST GROUNDMASS     (   25%)

Alteration - CARBONATE
             Location: VESICLES,
             Location: CRACKS

             CLAY MINERALS
             Location: VESICLES,      Replacing: OL PHENOS
             Location: CRACKS
             BROWNISH GREEN;

             SERPENTINITE
             Replacing: OL PHENOS

Vesicles   -
             Size(mm):  0.2-0.4
             Percent:     5
             Filling: CLAY.MIN
             Shape: OVAL
             FILLING IS BROWNISH GREEN CLAY*




Leg : 63    Top/Bottom Interval(mm):  250/ 270  Describer: Shibata, T.
Hole: 470   Top of Core Depth(m)   :   161.50   Rock Type: IGNEOUS
Core:  18   Sample Midpoint(m)     :   164.76   Sect/Pc #:  3/PCE 1D

ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
       INTERGRANULAR-INTERSERTAL GROUNDMASS;
       Where sampled: PILLOW INTERIOR*

Phenocrysts- OLIVINE                   (    2%)
             Size(mm):    0.3-0.5  Morphology: EUHEDRAL
             PSEUDOMORPHS--COMPLETELY ALTERED TO IDDINGSITE +
             CALCITE,MICROPHENOS;

             PLAGIOCLASE               (    5%)
             Size(mm):    0.3-1.0  Morphology: EUHEDRAL
             PHENOS + MICROPHENOS*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):   0.05-0.2  Morphology: SKELETAL,EUHEDRAL

             CLINOPYROXENE             (   40%)
             Size(mm):   0.01-0.2  Morphology: SKELETAL,FEATHERY,EQUANT,

             Morphology: DENDRITIC

             MICROCRYST GROUNDMASS     (   10%)

             OPAQUE MINERALS           (   10%)
             Size(mm):   0.01-0.1  Morphology: ACICULAR-EQUANT

Alteration - CALCITE
             Replacing: OL PHENOS

             IDDINGSITE
             Replacing: OL PHENOS

             CLAY MINERALS
             Location: VESICLES

Vesicles   -
             Size(mm):  0.2-0.4
             Percent:     3
             Filling: CLAY.MIN
             Shape: CIRCULAR
             FILLING IS REDDISH BROWN CLAY*

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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