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Pacific Coastal & Marine Science Center

Monterey Bay Studies

Monterey Bay Studies


Hydrocarbons Associated with Fluid Venting Process in Monterey Bay, California

Methane Diagram

Methane Carbon and Deuterium Isotopic Composition

Methane in the clam colonies is likely produced by non-clam symbionic bacteria via the carbonate reduction pathway:

CO2 + 8H+ + 8e- <<-->> CH4 + 2 H2O

A small amount of amount of thermogenic methane from depth may account for some methane near carbonate crust site #2 (6/27/94).

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