Core Data from the Deep Sea Drilling Project

Leg : 70    Top/Bottom Interval(mm):  110/ 140  Describer: Schrader, E.L.
Hole: 506G  Top of Core Depth(m)   :    29.50   Rock Type: IGNEOUS
Core:   2   Sample Midpoint(m)     :    29.63   Sect/Pc #:  1/PCE 2

ROCK = CPX-PLAG-OL SPARSELY PHYRIC BASALT;
       Texture: SPARSELY PHYRIC,AXIOLITIC,MEDIUM-GRAINED,
       INTERSERTAL,HYALOPILITIC*

Phenocrysts- OLIVINE                   (  <<1%)
             Size(mm):    .75X.75  Morphology: SUBHEDRAL
             IN RIPPED OUT AREA,QUESTIONABLE ID;

             PLAGIOCLASE               (  <<1%)
             Size(mm):      .5X.3  Morphology: LATHY-EQUANT
             VERY RARE,ZONED;

             CLINOPYROXENE             (   <1%)
             Size(mm):      .4X.3  Morphology: ANHEDRAL

Groundmass - PLAGIOCLASE               (   50%)
             Size(mm):      .5X.1  Morphology: SKELETAL
             MATURE SHEAF TEXTURE;

             CLINOPYROXENE             (   35%)
             Size(mm):      .1X.1  Morphology: ANHEDRAL
             INTERGROWN WITH PLAG;

             MAGNETITE                 (   10%)
             Morphology: SKELETAL
             INTERSTITIAL TO SILICATES;

             GLASS                     (    5%)
             INTERSTITIAL TO SILICATES*

Vesicles   -
             Size(mm):       .3
             Percent:     1
             Location: SCATTERED
             Filling: EMPTY
             Shape: ROUND




Leg : 70    Top/Bottom Interval(mm):  310/ 330  Describer: Schrader, E.L.
Hole: 506G  Top of Core Depth(m)   :    29.50   Rock Type: IGNEOUS
Core:   2   Sample Midpoint(m)     :    29.82   Sect/Pc #:  1/PCE 4

ROCK = PLAG-CPX MOD PHYRIC BASALT;
       Texture: FINE-GRAINED,VARIOLITIC,MOD PHYRIC;
       Where sampled: FLOW INTERIOR*

Phenocrysts- PLAGIOCLASE               (   <5%)
             Size(mm):      .4X.2  Morphology: LATHY
             ZONED,OFTEN OCCUR AS GLOMEROCRYSTS;

             CLINOPYROXENE             (   <5%)
             Size(mm):    .08X.04  Morphology: ANHEDRAL
             OFTEN OCCUR AS GLOMEROCRYSTS*

Groundmass - MAGNETITE                 (    2%)
             INTERSTITIAL;

             GLASS                     (    5%)
             INTERSTITIAL;

             OTHER                     (   90%)
             Size(mm):   .01X.001  Morphology: ACICULAR
             MICROLITES,APPROX COMP PLAG/CPX,IN THE FORM OF
             VARIOLES*

Alteration - CLAY MINERALS             (    1%)
             Location: FILLING VOIDS
             MORE COMMON NEAR ROCK BOUNDARY*

Vesicles   -
             Size(mm):      .01
             Percent:   1-3
             Location: SCATTERED
             Filling: SMEC NEAR RIM
             Shape: ROUND

             Filling: OF ROCK+GLASS+

             Filling: EMPTY




Leg : 70    Top/Bottom Interval(mm):  900/ 930  Describer: Schrader, E.L.
Hole: 506G  Top of Core Depth(m)   :    29.50   Rock Type: IGNEOUS
Core:   2   Sample Midpoint(m)     :    30.42   Sect/Pc #:  1/PCE 1D

ROCK = PLAG SPARSELY PHYRIC BASALT;
       Texture: SPARSELY PHYRIC,HYALOPILITIC,MEDIUM-GRAINED;
       Where sampled: FLOW INTERIOR*

Phenocrysts- PLAGIOCLASE               (  <<1%)
             Size(mm):      .2X.1  Morphology: EQUANT-LATHY
             VERY RARE,ZONED AND STRAINED*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):     .1X.01  Morphology: SKELETAL LATHS
             SUBOPHITIC TEXTURE;

             CLINOPYROXENE             (   40%)
             Size(mm):    .05X.04  Morphology: ANHEDRAL

             MAGNETITE                 ( 5-10%)
             Morphology: SKELETAL
             INTERSTITIAL TO SILICATES;

             GLASS                     (10-15%)
             INTERSTITIAL TO SILICATES*

Alteration - CLAY MINERALS             (  <<1%)
             Location: NEAR ONE EDGE
             FILLING PRIMARY VOIDS*

Vesicles   -
             Size(mm):    .1X.1
             Percent:   2-3
             Location: SCATTERED
             Filling: SMEC NEAR ROCK
             Shape: ROUND

             Filling: BOUNDARY

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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