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Detailed Reference Information |
Rowe, M.M. and Gettrust, J.F. (1993). Fine structure of methane hydrate-bearing sediments on the Blake Outer Ridge as determined from deep-tow multichannel seismic data. Journal of Geophysical Research 98: doi: 10.1029/92JB01706. issn: 0148-0227. |
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High-resolution, deep-two multichannel seismic data are used to investigate the detailed structure of sediments containing methane hydrate. These data support thick, laterally extensive layers of methane hydrate-bearing sediment underlain by a bottom simulating reflector (BSR) and spatially discontinuous zones of hydrate within the sediments above the BSR depth where no BSR is present. These data resolve normal faults which extend from the surface through the BSR with apparent offsets of up to 20 m. A phase inversion identified at the top of the BSR shows that the material immediately beneath the BSR has anomalously low velocity, consistent with a layer of sediment containing free methane gas. The fault offsets along the BSR are consistent with a pressure change of ~200 kPa (~2 bars) across the fault zone. |
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Abstract |
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Keywords
Marine Geology and Geophysics, Marine seismics, Marine Geology and Geophysics, Instruments and techniques, Exploration Geophysics, Oceanic structures, Information Related to Geographic Region, Atlantic Ocean |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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