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Geological setting of chemosynthetic communities in the Monterey Fan Valley system

Deep Sea Research Part A, Oceanographic Research Papers

By:
, , , , , , , , , ,
DOI: 10.1016/0198-0149(90)90069-8

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Abstract

Alvin dives and camera tows within the "meander area" of the Monterey and Ascension Fan Valleys have located nine chemosynthetic communities over depths ranging from 3000 to 3600 m over a distance of 55 km. Most of the observed communities consist largely of Calyptogena phaseoliformis, but Solemya (species unknown) and a pogonophoran (genus Polybrachia), have also been identified. The ??13C values (-35.0 to -33.6 per mil) and the presence of APS reductase and ATP sulfurylase in the C. phaseoliformis tissue is consistent with sulfur chemoautotrophy. Two reduced organic matter sources for the H2S are proposed: (1) older beds exposed by the deep erosion (up to 400 m) of the fan valleys and (2) concentrations of anaerobically decomposd organic matter buried in the valley floor. ?? 1990.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Geological setting of chemosynthetic communities in the Monterey Fan Valley system
Series title:
Deep Sea Research Part A, Oceanographic Research Papers
DOI:
10.1016/0198-0149(90)90069-8
Volume
37
Issue:
11
Year Published:
1990
Language:
English
Publisher:
Elsevier
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1651
Last page:
1667
Number of Pages:
17