Core Data from the Deep Sea Drilling Project

Leg : 25    Top/Bottom Interval(mm):  290/1500  Analyst: Vallier, T.
Hole: 240   Sample Midpoint (m)    :   193.50
Core:   7   Top of Core Depth (m)  :   192.00
Sect:  1    Top of Section Depth(m):   192.29

LITHOLOGY: BASALT;

  Piece No.  : PCES 1 (29-33), 2 (33-39), 3 (39-44), 4 (45-60),
               5 (61-64), 6 (64-66), 7 (65-70), 8 (71-81),
               9 (83-85), 10 (86-91), 11 (92-97), 12 (99-104),
               13 (105-111), 14 (112-119), 15 (121-132),
               16 (133-136), 17 (138-150);

  Texture    : BETWEEN 42 AND 150 CM ROCK IS CRYSTALLINE BASALT +
               FINE TO MEDIUM GRAINED WITH ABUNDANT FRACTURES;

  Structure  : BASALT AT 30-33 CM IS FOLLOWED BY FRAGMENTS RIMMED
               ON TWO SIDES (CIRCULAR FRACTURES) WITH BLACK
               BASALTIC GLASS AND CALCITE THAT INCLUDES ANGULAR
               CHLORITE FRAGMENTS (PCES NUMBERED 2 AND 3), BETWEEN
               42 AND 150 CM BASALT HAS ABUNDANT FRACTURES WITH
               SOME OF WHICH ARE FILLED WITH CALCITE;

  Alteration : MEGASCOPIC EXAMINATION INDICATES THAT
               CHLORITIZATION OF THE BASALT IS QUITE INTENSE;

  Comments   : GREENISH BLACK (5 G 2/1) TO DARK GRAY (N 3),
               BEGINNING WITH MEDIUM GRAY BASALT AT 30-33 CM
               WHICH IS FOLLOWED BY FRAGMENTS RIMMED ON TWO SIDES
               (CIRCULAR FRACTURES) WITH BLACK BASALTIC GLASS
               AND CALCITE THAT INCLUDES ANGULAR CHLORITE FRAGMENTS
               (PCES NUMBERED 2 AND 3), FOR MORE INFORMATION
               SEE CORE FORM AND LITHOLOGIC DESCRIPTION IN THE
               INITIAL REPORTS;

  Vesicles   :
               Location:            Filling: CALCITE
               SOME VUGS LINED WITH CALCITE CRYSTALS;

  Replacement: CHLORITE

               CALCITE
               CALCITE IN SOME FRACTURES;


Leg : 25    Top/Bottom Interval(mm):    0/   0  Analyst:
Hole: 240   Sample Midpoint (m)    :   193.60
Core:   7   Top of Core Depth (m)  :   192.00
Sect: CC    Top of Section Depth(m):   193.60

LITHOLOGY: BASALT BRECCIA;

  Texture    : BRECCIATED BASALT, MEDIUM GRAINED BASALT CLASTS
               CEMENTED BY CALCITE VEINS OF UP TO 1 CM;

  Structure  : MEDIUM GRAINED BASALT CLASTS CEMENTED BY CALCITE
               VEINS OF UP TO 1.0 CM;

  Comments   : FOR MORE INFORMATION SEE CORE FORM AND LITHOLOGIC
               DESCRIPTION IN THE INITIAL REPORTS;

  Replacement: CALCITE
               CALCITE VEINS UP TO 1 CM;


Leg : 25    Top/Bottom Interval(mm):    0/   0  Analyst:
Hole: 240   Sample Midpoint (m)    :   193.10
Core:   8   Top of Core Depth (m)  :   193.00
Sect: CC    Top of Section Depth(m):   193.10

LITHOLOGY: BASALT;

  Texture    : DENSE, CRYSTALLINE, MEDIUM GRAINED;

  Structure  : CHLORITE RIMMED FRACTURES;

  Comments   : FOR MORE INFORMATION SEE CORE FORM AND LITHOLOGIC
               DESCRIPTION IN THE INITIAL REPORTS;

  Replacement: CHLORITE
               CHLORITE RIMMED FRACTURES;

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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