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    Gas and gas hydrate distribution around seafloor seeps in Mississippi Canyon, Northern Gulf of Mexico, using multi-resolution seismic imagery

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    Wood et al.pdf (1.140Mb)
    Date
    2008-05-10
    Author
    Wood, Warren T.  Concept link
    Hart, Patrick E.  Concept link
    Hutchinson, Deborah R.  Concept link
    Dutta, Nadar  Concept link
    Snyder, Fred  Concept link
    Coffin, Richard B.  Concept link
    Gettrust, Joseph F.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/2619
    As published
    https://doi.org/10.1016/j.marpetgeo.2008.01.015
    DOI
    10.1016/j.marpetgeo.2008.01.015
    Keyword
     Methane hydrate; Seafloor seep 
    Abstract
    To determine the impact of seeps and focused flow on the occurrence of shallow gas hydrates, several seafloor mounds in the Atwater Valley lease area of the Gulf of Mexico were surveyed with a wide range of seismic frequencies. Seismic data were acquired with a deep-towed, Helmholz resonator source (220–820 Hz); a high-resolution, Generator-Injector air-gun (30–300 Hz); and an industrial air-gun array (10–130 Hz). Each showed a significantly different response in this weakly reflective, highly faulted area. Seismic modeling and observations of reversed-polarity reflections and small scale diffractions are consistent with a model of methane transport dominated regionally by diffusion but punctuated by intense upward advection responsible for the bathymetric mounds, as well as likely advection along pervasive filamentous fractures away from the mounds.
    Description
    This paper is not subject to U.S. copyright. The definitive version was published in Marine and Petroleum Geology 25 (2008): 952-959, doi:10.1016/j.marpetgeo.2008.01.015.
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    • Energy and Geohazards
    Suggested Citation
    Marine and Petroleum Geology 25 (2008): 952-959
     

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