Core Data from the Deep Sea Drilling Project

Leg : 84    Top/Bottom Interval(mm):   20/   0  Describer: Helm, R.
Hole: 566C  Top of Core Depth(m)   :   109.10   Rock Type: METAMORPHIC
Core:   5   Sample Midpoint(m)     :   109.12   Sect/Pc #:  1/

ROCK = SERPENTINITE*

Groundmass - MAGNETITE

Alteration - CARBONATE                 (   15%)
             Location: SERP
             DOLOMITE, BLOCKY, RHOMBS;

             SERPENTINITE              (   60%)
             SHEARED*




Leg : 84    Top/Bottom Interval(mm):   20/   0  Describer: Ogawa, Y.
Hole: 566C  Top of Core Depth(m)   :   109.10   Rock Type: METAMORPHIC
Core:   5   Sample Midpoint(m)     :   109.12   Sect/Pc #:  1/

ROCK = SERPENTINITE
       ORIGINALLY HARZBURGITE;
       Texture: FIBROUS, GRANULAR, COARSE*

Phenocrysts- ORTHOPYROXENE             (   10%)

             OPAQUE MINERAL            (   25%)

Alteration - CARBONATE
             Location: VEIN
             SPORADIC*




Leg : 84    Top/Bottom Interval(mm):  100/ 120  Describer: Helm, R.
Hole: 566C  Top of Core Depth(m)   :   117.20   Rock Type: METAMORPHIC
Core:   6   Sample Midpoint(m)     :   117.31   Sect/Pc #:  1/

ROCK = SERPENTINITE*

Phenocrysts- OLIVINE                   (   15%)

             CLINOPYROXENE             (    3%)
             Size(mm):          2
             DIOPSIDE;

             CHROMITE                  (    2%)
             Size(mm):      0.5-2
             PORPHYROCLASTIC;

             ORTHOPYROXENE             (   10%)
             Size(mm):          2  Morphology: BASTITE
             PARTIALLY BASTITE, PORPHYROCLASTIC CPX
             EXSOLUTION*

Groundmass - MAGNETITE                 (    3%)

Alteration - CARBONATE                 (   TR%)
             Replacing: SERPENTINITE
             DOLOMITE;

             SERPENTINITE
             Replacing: OPX, OL

             ZEOLITE                   (   TR%)
             Replacing: OL
             BRUCITE;

             TALC                      (    3%)
             Replacing: SERP, OPX




Leg : 84    Top/Bottom Interval(mm):  310/ 330  Describer: Bloomer, S.
Hole: 566C  Top of Core Depth(m)   :   117.20   Rock Type: METAMORPHIC
Core:   6   Sample Midpoint(m)     :   117.52   Sect/Pc #:  1/

ROCK = SERPENTINITE
       SOURCE IS INITIAL REPORTS*

Groundmass - SERPENTINITE              ( 75.2%)

             OPAQUE MINERALS           (  0.2%)

             BASTITE                   ( 18.3%)

             OLIVINE                   (  1.2%)

             ORTHOPYROXENE             (  1.0%)

             SPINEL                    (  1.0%)

             CLINOPYROXENE             (  2.9%)
             VEINS;

             OTHER                     (  0.1%)

             COMBINATION               (  0.2%)
             INCLUDES TALC+TREMOLITE*




Leg : 84    Top/Bottom Interval(mm):  130/ 140  Describer: Bloomer, S.
Hole: 566C  Top of Core Depth(m)   :   126.90   Rock Type: METAMORPHIC
Core:   7   Sample Midpoint(m)     :   127.04   Sect/Pc #:  1/

ROCK = SERPENTINITE
       SOURCE IS INITIAL REPORTS*

Groundmass - SERPENTINITE              ( 88.6%)

             OPAQUE MINERALS           (  1.4%)

             BASTITE                   (  6.9%)

             OLIVINE                   (  0.0%)

             ORTHOPYROXENE             (  0.0%)

             SPINEL                    (  0.1%)

             CLINOPYROXENE             (  1.1%)

             OTHER                     (  1.9%)
             VEINS, PERCENTAGES OBTAINED BY POINT COUNT*




Leg : 84    Top/Bottom Interval(mm):    0/   0  Describer: Bourgois, J.
Hole: 566C  Top of Core Depth(m)   :    88.10   Rock Type: SEDIMENTARY
Core: H 2   Sample Midpoint(m)     :    90.17   Sect/Pc #: CC/

ROCK = DRILLING BRECCIA
       5% CARB, 25% PLAG, 1% MICA, 4% HEAVY MINS, 33%
       VOLCANIC FRAG POSSIBLY ANDESITIC LAVA, 2% MAGN,
       20% CARB IN MATRIX, LABRADORITE EXTINCTION ANGLE
       33 DEGREES*

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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