Geological setting of chemosynthetic communities in the Monterey Fan Valley system
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.
Citation Information
Publication Year | 1990 |
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Title | Geological setting of chemosynthetic communities in the Monterey Fan Valley system |
DOI | 10.1016/0198-0149(90)90069-8 |
Authors | R.W. Embley, S. L. Eittreim, C.H. McHugh, W. R. Normark, G.H. Rau, Barbara Hecker, A.E. DeBevoise, H. Gary Greene, William B. F. Ryan, C. Harrold, C. Baxter |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Deep Sea Research Part A, Oceanographic Research Papers |
Index ID | 70015989 |
Record Source | USGS Publications Warehouse |