P-wave and S-wave velocity structure of northern Cascadia margin gas hydrates
نویسندگان
چکیده
منابع مشابه
Iodp Expedition 311: Cascadia Margin Gas Hydrates Site U1329 Summary
The objectives of coring and downhole logging at this site are tied to completing the transect of scientific drill sites across the Northern Cascadia Margin to further constrain models for the formation of marine gas hydrate in a subduction zone acretionary prism. The depth to the BSR rapidly becomes shallower around this site and is only half the depth (~125 mbsf) than at Site U1327 (~225) mbs...
متن کاملIodp Expedition 311: Cascadia Margin Gas Hydrates Site U1325 Summary
Site U1325 (Prospectus Site CAS-02C) is located near the southwestern end of the marginperpendicular transect established during Expedition 311 and is within a major slope basin that developed eastward of the deformation front behind a steep ridge of accreted sediments. Bathymetry data show that the seafloor in the western part of this slope basin is relatively flat with water depths around 220...
متن کاملIodp Expedition 311: Cascadia Margin Gas Hydrates Site U1328 Summary
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 ...
متن کاملIodp Expedition 311: Cascadia Margin Gas Hydrates Site U1327 Summary
Site U1327 (Scientific Prospectus Site CAS-01B) is located near ODP Site 889/890 approximately at the mid-slope of the accretionary prism over a clearly defined BSR, estimated to be at a depth of 223 mbsf. The primary research objectives for this site are linked to the transect-concept of this expedition. Site 889/890 has provided critical baseline data for the development of the objectives of ...
متن کاملP and S Wave Velocity Determination
There are three general methods that can be used to determine formation velocities from full waveform logs. The first approach is to make use of the data from the entire waveform. This type of velocity analysis is performed either in the frequency domain (I.e. f-k analysis or the two station method) or in the time domain (I.e. velocity spectral analysis). The second approach is to identify the ...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2011
ISSN: 0956-540X
DOI: 10.1111/j.1365-246x.2011.05215.x