Geology and geochemistry of gas-charged sediment on Kodiak Shelf, Alaska
Geo-Marine Letters
By: M. A. Hampton and K. A. Kvenvolden
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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.
Study Area
| 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 |
| Description | 7 p. |
| First page | 141 |
| Last page | 147 |
| Country | United States |
| State | Alaska |
| Other Geospatial | Kodiak Shelf |
| Google Analytic Metrics | Metrics page |