Core Data from the Deep Sea Drilling Project

Leg : 12    Top/Bottom Interval(mm):  310/ 330  Describer: Aumento, F.
Hole: 118   Top of Core Depth(m)   :   750.00   Rock Type: IGNEOUS
Core:  19   Sample Midpoint(m)     :   750.32   Sect/Pc #:  1/

ROCK = OL SPARSELY PHYRIC BASALT
       ENCODED FROM THE IR, OXIDIZED;
       Texture: FINE-GRAINED,VARIOLITIC*

Phenocrysts- OLIVINE                   ( RARE%)
             REPLACED BY SERP AND IDDINGS*

Groundmass - PLAGIOCLASE
             Morphology: ACICULAR
             NETWORK OF XTLS;

             FERROUS OXIDE
             Morphology: SKELETAL

             CLINOPYROXENE
             Morphology: GRANULAR

Alteration - ZEOLITE
             Location: CORES          Replacing: PLAG

Vesicles   -
             Filling: CHLORITE
             BROWN ZEOLITE*




Leg : 12    Top/Bottom Interval(mm):  200/ 210  Describer: Aumento, F.
Hole: 118   Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  20   Sample Midpoint(m)     :   756.21   Sect/Pc #:  1/

ROCK = OL PHYRIC BASALT
       ENCODED FROM IR, HIGHLY OXIDIZED;
       Texture: FINE-GRAINED*

Phenocrysts- OLIVINE
             ALTERED TO SERP AND IDDINGS*

Groundmass - PLAGIOCLASE
             Morphology: ACICULAR TO SKELETAL
             RANDOMLY ORIENTED, SET IN OXIDIZED MATRIX;

             CLINOPYROXENE
             Morphology: GRAINS

             FERROUS OXIDE

Alteration - SERPENTINITE
             Replacing: OL

             IDDINGSITE
             Replacing: OL

             CALCITE
             Location: VEINS

             CHLORITE
             Location: VEINS

             FERROUS MN OXIDE
             Location: VEINS

Vesicles   -
             Filling: CHLORITE
             BROWN TO GREEN*




Leg : 12    Top/Bottom Interval(mm):  200/ 210  Describer: Ryall, P.
Hole: 118   Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  20   Sample Midpoint(m)     :   756.21   Sect/Pc #:  1/

ROCK = OL PHYRIC BASALT
       ENCODED FROM IR*

Groundmass - MAGNETITE
             Morphology: SKELETAL
             UNIFORM DISTRIBUTION,CLASS 1,COMPLETELY WHITENED;

             TITANOMAGNETITE
             UNIFORMLY ALTERED*

Alteration - HEMATITE
              DISSEMINATED*




Leg : 12    Top/Bottom Interval(mm):  670/ 710  Describer: Aumento, F.
Hole: 118   Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  20   Sample Midpoint(m)     :   756.69   Sect/Pc #:  1/

ROCK = OL-PLAG PHYRIC BASALT
       ENCODED FROM IR, OXIDIZED;
       Texture: VARIOLITIC,PHYRIC*

Phenocrysts- OLIVINE
             ALTERED;

             PLAGIOCLASE
             REPLACED TO VARYING DEGREES*

Groundmass - PLAGIOCLASE
             Morphology: ACICULAR TO SKELETAL
             SET IN FINE-GRAINED OXIDIZED GROUNDMASS;

             CLINOPYROXENE
             Morphology: GRANULAR

             FERROUS OXIDE

             OLIVINE
             Morphology: THIN RODS
             REPLACED BY IDDINGS;

             MATRIX
             INDETERMINATE, BEING COMPOSED OF PATCHES OF
             GREEN TO BROWN CHLORITIC MATERIAL*

Alteration - CHLORITE
             Location: GROUNDMASS

             ZEOLITE
             Location: GROUNDMASS     Replacing: PLAG PHENOS

             IDDINGSITE
             Location: GROUNDMASS     Replacing: OL PHENOS

             SERPENTINITE
             Replacing: OL PHENOS

             CALCITE
             Location: VEINS

Vesicles   -
             Filling: CHLORITE
             RED-BROWN*




Leg : 12    Top/Bottom Interval(mm): 1230/1260  Describer: Aumento, F.
Hole: 118   Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  20   Sample Midpoint(m)     :   757.24   Sect/Pc #:  1/

ROCK = OL-PLAG PHYRIC BASALT
       SAME AS (118-20-1,67-71)*




Leg : 12    Top/Bottom Interval(mm): 1260/1350  Describer: Aumento, F.
Hole: 118   Top of Core Depth(m)   :   756.00   Rock Type: IGNEOUS
Core:  20   Sample Midpoint(m)     :   757.31   Sect/Pc #:  1/

ROCK = OL-PLAG PHYRIC BASALT
       SAME AS (118-20-1,67-71)*

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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