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Summary Information for Field Activity 2008-029-FA

Area of Operations: Cascadia margin, Vancouver Island, Canada, North Pacific
48.60 deg N 127.04 deg W
Barkley Canyon, Vancouver Island, Canada, North Pacific
48.31 deg N 126.06 deg W

Dates: July 29, 2008 to August 12, 2008

Chief scientist: John Pohlman

   Michael Riedel, McGill University; Ross Haacke, Geological Survey of Canada

Objectives: 1) To determine the timing and cause of submarine slumps at the frontal ridge; 2) to investigate the role of gas hydrate in the mechanisms controlling and responding to submarine slumping; and 3) to determine the potential for fluid and gas venting and formation of gas hydrate in and around the slump sites.

Type of Activity: Sampling; Seismic profiling;

Information to be derived: Samples and chemical analysis;

Summary: Acquired pore water and sediment samples for numerous chemical and isotopic analyses to aid in interpreting the cause and history of submarine landslides along the base of the Northern Cascadia Margin and the cycling of methane carbon and higher hydrocarbons at several mid-slope seep sites. About 75% of the pore water samples collected have been analyzed for sulfate and chloride concentration.

Contact: John Pohlman (jpohlman@usgs.gov)

InfoBank: uses the identifier T-29-08-NP. Visit this site for more information.

Related Links:

Platform Info:
JOHN P TULLY

Publications resulting from these data

Pohlman, J.W., Riedel, M., Waite, W., Rose, K., and Lapham, L.,2008, Application of rhizon samplers to obtain high-resolution pore fluid records during geochemical investigations of gas hydrate systems: Fire in the Ice, U.S. Department of Energy/National Energy Technology Laboratory, Methane Hydrate Newsletter, Fall 2008, p. 16-17. (Also available at http://www.netl.doe.gov/technologies/oil-gas/publications/Hydrates/Newsletter/HMNewsFall08.pdf)

Enkin, R., Esteban, L., Haacke, R., Hamilton, T.S., Hogg, M., Lapham, L., Middleton, G., Neelands, P., Pohlman, J., Riedel, M., Rose, K., Schlesinger, A., Standen, G., Stephenson, A., Taylor, S., Waite, W., and Wang, X.,2008, Investigating gas hydrate as a factor in accretionary margin frontal ridge slope failures and cold seep biogeochemistry: Fire in the Ice, U.S. Department of Energy/National Energy Technology Laboratory, Methane Hydrate Newsletter, Fall 2008, p. 9-12. (Also available at http://www.netl.doe.gov/technologies/oil-gas/publications/Hydrates/Newsletter/HMNewsFall08.pdf)

Data Types and Locations:

GeochemistryLogsPhotosSamplesSeismics

 

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