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Methane sources, distributions, and fluxes from vent sites at Hydrate Ridge, Cascadia Margin

Creator:

Heeschen, Katja U., Collier, Robert W., de Angelis, Marie A., Suess, Erwin, Rehder, Gregor, Linke, Peter, and Klinkhammer, Gary P.

Abstract:

To constrain the fluxes of methane (CH4) in the water column above the accretionary wedge along the Cascadia continental margin, we measured methane and its stable carbon isotope signature (δ¹³C-CH₄). The studies focused on Hydrate Ridge (HR), where venting occurs in the presence of gas-hydrate-bearing sediments. The vent CH₄ has...

Resource Type:

Article

Full Text:

cold vent sites at Hydrate Ridge, Cascadia Margin Katja U. Heeschen,1,2,3 Robert W. Collier,1 Marie A
Nitrous oxide studies in two marine environments : an unpolluted estuary and the interstitial water of a deep-sea sediment

Creator:

De Angelis, Marie Agatha

Resource Type:

Masters Thesis

Full Text:

and The interstitial Water of a D eepSea Sediment by Marie Agatha de Angelis A THESIS submitted
Is methane venting at the seafloor recorded by δ13C of benthic foraminifera shells?

Creator:

Torres, Marta E., Mix, Alan C., Kinports, K., Haley, Brian A., Klinkhammer, Gary P., McManus, James, and de Angelis, M. A.

Abstract:

The isotopic composition of the dissolved inorganic carbon (DIC) collected at sites of active methane discharge on Hydrate Ridge, Oregon, reveals anaerobic methane oxidation mediated by bacteria, with δ13CDIC reaching values as low as –48‰ in the upper 4 cm of the sediment. In spite of the high sulfide levels...

Resource Type:

Article

Full Text:

. Klinkhammer,1 J. McManus,1 and M. A. de Angelis2 Received 2 July 2002; revised 12 February 2003; accepted 12