Summary for Field Activity Number 2008-029-FA

Alternate Leg ID: 2008-007-PGC; T-29-08-NP

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

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 add 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.

USGS Project Number: 2921-0FP3A - Project Description

Contact: John Pohlman (jpohlman@usgs.gov)

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