Ethane enrichment and propane depletion in subsurface gases indicate gas hydrate occurrence in marine sediments at southern Hydrate Ridge offshore Oregon

July 2, 2004

Journal Article

Ethane enrichment and propane depletion in subsurface gases indicate gas hydrate occurrence in marine sediments at southern Hydrate Ridge offshore Oregon

Abstract

The recongnition of finely disseminated gas hydrate in deep marine sediments heavily depends on various indirect techniques because this mineral quickly decomposes upon recovery from in situ pressure and temperature conditions. Here, we discuss molecular properties of closely spaced gas voids (formed as a result of core recovery) and gas hydrates from an area of relatively low gas flux at the flanks of the southern Hydrate Ridge Offshore Oregon (ODP Sites 1244, 1245 and 1247).

Revised: February 22, 2005 | Published: July 2, 2004

Citation

Milkov A.V., G.E. Claypool, Y. Lee, M.E. Torres, W.S. Borowski, H. Tomaru, and R. Sassen, et al. 2004. Ethane enrichment and propane depletion in subsurface gases indicate gas hydrate occurrence in marine sediments at southern Hydrate Ridge offshore Oregon. Organic Geochemistry 35, no. 9:1067 - 1080. PNWD-SA-6717.