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Interstitial water studies on small core samples, Leg 22

Initial reports of the Deep Sea Drilling Project

By:
, ,
DOI: 10.2973/dsdp.proc.22.131.1974

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Abstract

Interstitial waters from Leg 22 in the Indian Ocean revealed two unique results: Site 214, on the Ninetyeast Ridge, penetrated through a 30-meter sequence of fine-grained basalt and reentered hard, silty clay containing carbonate skeletal debris. Such a basalt layer may well have been impervious and extensive enough to seal off underlying (fossil) seawater of Paleocene age. However, except for a marked increase in calcium and a slight increase in chloride, no appreciable changes in pore fluid chemistry could be confirmed. Site 217, at the northernmost end of the Ninetyeast Ridge, demonstrated record concentrations of interstitial calcium in clayey nannofossil oozes and a relatively small but significant increment in chloride with depth. Presumably, these increments signal the existence of evaporitic sediments or evaporite-influenced brines at considerably greater depth than penetrated.

Geospatial Extents

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Interstitial water studies on small core samples, Leg 22
Series title:
Initial reports of the Deep Sea Drilling Project
DOI:
10.2973/dsdp.proc.22.131.1974
Volume
22
Year Published:
1974
Language:
English
Publisher:
Integrated Ocean Drilling Program Management International
Publisher location:
College Station, TX
Contributing office(s):
Coastal and Marine Geology Program
Description:
6 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
657
Last page:
662
Number of Pages:
6
Other Geospatial:
Indian Ocean