Iodp Expedition 311: Cascadia Margin Gas Hydrates Site U1328 Summary
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چکیده
Site U1328 (Scientific Prospectus Site CAS-06A) is located within a seafloor cold-vent field, with dimensions 2 km by 4 km, consisting of at least four vents associated with nearsurface faults. The cold vents are characterized by near-vertical seismic blank (or wipe-out) zones that are between 80 and several 100 m wide, and show a clear E-W trend as identified from 3D seismic imaging. The most prominent vent in the field, referred to as Bullseye vent, is the target of this site and has been the subject of intensive geophysical and geochemical studies since 1999. Site U1328 is different than all of the other sites visited during this expedition in that it represents an area of active, focused fluid flow. A number of seismic surveys cross this site, including two single channel seismic (SCS) 3D surveys and a regional multichannel seismic (MCS) data set.
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Iodp Expedition 311: Cascadia Margin Gas Hydrates Site U1329 Summary
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