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Core Data from the Deep Sea Drilling Project


Leg : 29    Top/Bottom Interval(mm):  550/ 800  Analyst: Ovenshine, A.T.
Hole: 283   Sample Midpoint (m)    :   589.30
Core:  18   Top of Core Depth (m)  :   588.50
Sect:  1    Top of Section Depth(m):   589.05

LITHOLOGY: BASALT;

  Piece No.  : PCES 1 (55-60), 2 (60-64), 3 (65-71), 4 (72-78);

  Texture    : FELDSPAR LATHS, DEVITRIFIED BASALTIC GLASS AND IS
               LIGHT GREENISH GREY;

  Structure  : CALCITE AND SERPENTINE VEINLETS, PCE 4 HAS A 2 CM
               DARK RED PALAGONITE VEINLET WHICH SUGGESTS INTER-
               PILLOW GLASS;

  Comments   : DEVITRIFIED BASALTIC GLASS, LIGHT GREENISH GREY
               (5 G 7/1), SEE LITHOLOGIC DESCRIPTION IN THE
               INITIAL REPORT FOR MORE INFORMATION;

  Groundmass : FELDSPAR                  (  < 2%)
               ROCK CONSISTS OF LESS THAN OR EQUAL TO 2 PERCENT
               FELDSPAR LATHS IN GROUNDMASS OF CLAY + ZEOLITE +
               SERPENTINE;

  Replacement: CLAY

               ZEOLITE

               SERPENTINITE
               ROCK CONSISTS OF LESS THAN OR EQUAL TO 2 PERCENT
               FELDSPAR LATHS IN GROUNDMASS OF CLAY + ZEOLITE +
               SERPENTINE;

               CALCITE

               PALAGONITE

               SERPENTINITE
               CALCITE AND SERPENTINE VEINLETS, PCE 4 HAS A DARK
               RED PALAGONITE VEINLET;


Leg : 29    Top/Bottom Interval(mm):  800/1000  Analyst: Ovenshine, A.T.
Hole: 283   Sample Midpoint (m)    :   589.50
Core:  18   Top of Core Depth (m)  :   588.50
Sect:  1    Top of Section Depth(m):   589.30

LITHOLOGY: BASALT;
           BASALTIC BRECCIA;

  Piece No.  : PCES 5 (80-83), 6 (83-100);

  Texture    : TECTONIC OR AUTOBRECCIA CONSISTS OF AMYGDALOIDAL
               BASALT (80 PERCENT), DARK DEVITRIFIED GLASS
               FRAGMENTS (5 PERCENT);

  Structure  : TECTONIC OR AUTOBRECCIA CONSISTS OF AMYGDALOIDAL
               BASALT (80 PERCENT) + CALCITE VEINS (15 PERCENT)
               + DARK DEVITRIFIED GLASS FRAGMENTS (5 PERCENT),
               MINOR DARK GREEN SERPENTINE VEINLETS;

  Alteration : ALTERED BASALTIC BRECCIA;

  Comments   : DARK GREENISH-GREY (5 GY 3/1);

  Vesicles   : Size(mm):        1   Percent:
               TECTONIC OR AUTOBRECCIA IS 80 PERCENT AMYGDALOIDAL
               BASALT, AMYGDULES AVERAGE 1 MM;

  Groundmass : GLASS
               DARK DEVITRIFIED GLASS FRAGMENTS;

  Replacement: CALCITE
               CALCITE VEINS;

               SERPENTINITE
               DARK GREEN SERPENTINE VEINLETS;


Leg : 29    Top/Bottom Interval(mm): 1000/1500  Analyst: Ovenshine, A.T.
Hole: 283   Sample Midpoint (m)    :   590.00
Core:  18   Top of Core Depth (m)  :   588.50
Sect:  1    Top of Section Depth(m):   589.50

LITHOLOGY: BASALT;

  Piece No.  : PCES 7 (100-106), 8 (105-110), 9 (110-117),
               10 (111-116), 11 (118-131), 12 (132-139),
               13 (139-150);

  Texture    : ZONES OF BRECCIATION;

  Structure  : ALTERED BASALT CUT BY CALCITE AND SERPENTINE
               VEINLETS UP TO 1 CM;

  Comments   : DARK GREENISH GREY (5 GY 3/1), ZONES OF BRECCIATION;

  Alteration : EXTENSIVELY ALTERED;

  Replacement: SERPENTINITE

               CALCITE
               ALTERED BASALT CUT BY CALCITE AND SERP VEINLETS;


Leg : 29    Top/Bottom Interval(mm):    0/ 800  Analyst: Ovenshine, A.T.
Hole: 283   Sample Midpoint (m)    :   590.30
Core:  19   Top of Core Depth (m)  :   589.50
Sect:  1    Top of Section Depth(m):   589.50

LITHOLOGY: BASALT;

  Piece No.  : PCES 1 (0-13), 2 (14-18), 3 (19-22), 4 (22-27),
               5 (27-31), 6 (32-38), 7 (40-47), 8 (48-51),
               9 (51-54), 10 (52-59), 11 (55-59), 12 (60-64),
               13 (64-69), 14 (70-76), 15 (75-79);

  Texture    : CHILLED RIM, (SEE STRUCTURE FOR ADDITIONAL
               INFORMATION);

  Structure  : FRAGMENT (PCE 6 INTERVAL 32-38 CM) CONTAINS A
               FRAGMENT OF THE UPPER SURFACE OF A PILLOW SHOWING A
               DEVITRIFIED GLASS VENEER AND A CHILLED RIM GRADING
               DOWNWARD TO HOLOCRYSTALLINE ALTERED BASALT - THIS
               FRAGMENT STRONGLY SUGGESTS THAT THE BASALT WAS
               EITHER A PILLOW FLOW OR A BROKEN PILLOW BRECCIA;

  Alteration : EXTENSIVELY ALTERED;

  Comments   : LITHOLOGY SIMILAR TO CORE 18 SECTION 1 INTERVAL
               100-150 CM, FRAGMENT OF THE UPPER SURFACE OF
               PILLOW SHOWING A DEVITRIFIED GLASS VENEER - SEE
               STRUCTURE FOR ADDITIONAL INFORMATION, SEE CORE FORM
               AND LITHOLOGIC DESCRIPTION IN THE INITIAL REPORT FOR
               FURTHER DETAILS;


    

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.

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