Carbon Signatures Entombed in Methane-soaked Gas Hydrate
Bearing Sediments: Preliminary Results.

Charles Paull, William Ussler III, Edward Peltzer, Peter Brewer, Rendy Keaten, Patrick Mitts
Monterey Bay Aquarium Research Institute, Moss Landing, California, USA

Juan-Carlos Herguera
CICECE, Ensenada, Mexico

Elena Perez
Los Angeles Museum of Natural History, Los Angeles, California, USA

Jeffrey Nealon
University of Wyoming, Laramie, Wyoming, USA

Thomas Naehr
Texas A&M, Corpus Christy, Texas, USA

Jens Greinert
GEOMAR, Kiel, Germany

John Barron
USGS, Menlo Park, California, USA


ABSTRACT

Extensive ROV-based sampling and exploration of the seafloor along the transform margin on the northeast side of the Guaymas Basin in the Gulf of California was conducted in water depth of 1,407 to 1,736 m. These dives were conducted to observe the nature of fluids venting from the seafloor, to determine the association with gas hydrates, and to measure the record left by methane venting on the carbonates from this area. A gas vent vigorous enough to generate a water column plume traceable for over 800 m above the seafloor located near seafloor gas hydrate exposures, extensive authigenic carbonates, and active chemosynthetic biological communities was encountered along a satellite ridge associated with the Guaymas transform plate margin. The results of this expedition are previewed here.


This page was last updated on 2010412.