Core Data from the Deep Sea Drilling Project

Leg : 43    Top/Bottom Interval(mm):     /      Describer: Houghton, R.
Hole: 387   Top of Core Depth(m)   :   791.90   Rock Type: IGNEOUS
Core:  50   Sample Midpoint(m)     :   791.90   Sect/Pc #:  1/

ROCK = PLAG-PYX PHYRIC BASALT;
       Texture: PHYRIC,FINE-GRAINED,HOLOCRYSTALLINE*

Phenocrysts- PLAGIOCLASE
             Size(mm):       0.75  Morphology: SUBHEDRAL,PRISMATIC
             COMMON,APPROX COMP AN55-78, 0.072-3.24MM IN SIZE,
             AVERAGE 0.75MM,SLIGHT ALTERATION TO SERICITE AND
             SMECTITE GIVES XTLS A TURBID APPEARANCE;

             PYROXENE                  ( RARE%)
             Morphology: SUBANGULAR
             CORRODED,VARIABLE OPTIC ANGLE-ALWAYS POSITIVE AND
             <25% SUGGESTING COMPOSITION BETWEEN PIGEONITE AND
             SUBCALCIC AUGITE, BOTH PHASES CORRODED AND SHOW
             OPTICAL STRAIN*

Groundmass - PLAGIOCLASE
             RANDOMLY ORIENTED,APPROX COMP AN65-76;

             PYROXENE
             Morphology: INTERGRANULAR
             GROUNDMASS A COMPLEX NETWORK OF PLAG+CPX,
             GROUNDMASS TEXTURE VARIES WIDELY THROUGHOUT BUT
             GENERALLY INCREASES IN COMPLEXITY DOWNWARD,FABRIC
             IS COMBINATION OF FEATHER-DUSTER AND TRUE
             FEATHER AND VARIOLITIC AND SHOCK (STOOK) GROUNDMASS
             TEXTURES;

             MAGNETITE
             Morphology: GRANULAR,SKELETAL

Alteration - SERICITE
             Replacing: PLAG

             SMECTITE
             Replacing: PLAG

             MONTMORILLONITE

             CHLORITE

Vesicles   -
             Percent:    <1
             Filling: CALCITE,MONT,

             Filling: CHLORITE
             AMYGDULES*

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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