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Geology and geochemistry of gas-charged sediment on Kodiak Shelf, Alaska

Geo-Marine Letters

By:
and
DOI: 10.1007/BF02463332

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Abstract

Methane concentrations in some sediment cores from the Kodiak Shelf and adjacent continental slope increase with depth by three or four orders of magnitude and exceed the solubility in water at ambient conditions. Acoustic anomalies in seismic-reflection records imply that methane-rich sediment is widespread. Molecular composition of hydrocarbon gases and isotopic composition of methane indicate gas formation by shallow biogenic processes. Stratigraphic positions of acoustic anomalies in Quaternary glacial and posttransgressive sediments suggest that these units are likely sources of gas. A seep along the extension of a fault may be gas venting from a deeper thermogenic source. ?? 1981 A.M. Dowden, Inc.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Geology and geochemistry of gas-charged sediment on Kodiak Shelf, Alaska
Series title:
Geo-Marine Letters
DOI:
10.1007/BF02463332
Volume
1
Issue:
2
Year Published:
1981
Language:
English
Publisher location:
Springer-Verlag
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geo-Marine Letters
First page:
141
Last page:
147