Pacific Coastal & Marine Science Center
Monterey Bay Studies
|Hydrocarbons Associated with Fluid Venting Process in Monterey Bay, California
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).