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Creator:: Tréhu, Anne Martine and Bangs, Nathan Lawrence Bailey
Abstract:: In the past several years, international interest in gas hydrates in marine sediments has increased considerably because of increasing recognition that the large volume of gas stored in hydrates or trapped beneath them is a significant fraction of the global methane budget, and may therefore be a source of energy...
Resource Type:: Technical Report
Full Text:: University Corvallis OR Nathan Bangs Institute for Geophysics University of Texas at Austin Austin TX

Creator:: Bangs, Nathan Lawrence Bailey, Musgrave, Robert J., and Tréhu, Anne Martine
Abstract:: High‐resolution three‐dimensional (3‐D) seismic reflection data acquired on the R/V Thomas G. Thompson in 2000 reveal a pair of bottom simulating reflections (BSRs) across a broad region of southern Hydrate Ridge, offshore Oregon. The primary BSR (BSRp) is a regionally extensive reflection that lies 120–150 m below seafloor and exhibits...
Resource Type:: Article
Full Text:: hydrate stability zone following postglacial warming, offshore Oregon Nathan L. B. Bangs University of

Creator:: Tréhu, Anne Martine, Bangs, Nathan Lawrence Bailey, and Guerin, Gilles
Abstract:: Three successful vertical seismic profiles (VSPs) were acquired during Ocean Drilling Program (ODP) Leg 204 at South Hydrate Ridge. The data confirm earlier results from ocean bottom seismometer data and analysis of moveout from common midpoint reflection data that the average velocity between the seafloor and the bottom-simulating reflector (BSR)...
Resource Type:: Article
Full Text:: DURING LEG 2041 Anne M. Tréhu,2 Nathan L. Bangs,3 and Gilles Guerin4 ABSTRACT Three successful

Creator:: Chevallier, Johanna, Tréhu, Anne Martine, Bangs, Nathan Lawrence Bailey, Johnson, Joel E., and Meyer, H. Jack
Abstract:: This paper presents a seismic sequence and structural analysis of a high-resolution three-dimensional seismic reflection survey that was acquired in June 2000 in preparation for Ocean Drilling Program (ODP) Leg 204. The seismic data were correlated with coring and logging results from nine sites drilled in 2002 during Leg 204....
Resource Type:: Article
Full Text:: TECTONIC EVOLUTION OF SOUTHERN HYDRATE RIDGE1 Johanna Chevallier,2,3 Anne M. Tréhu,2 Nathan L. Bangs,4

Creator:: Johnson, Joel E., Goldfinger, Chris, Tréhu, Anne M., Bangs, Nathan Lawrence Bailey, Torres, Marta E., and Chevallier, Johanna
Abstract:: Hydrate Ridge is an accretionary thrust ridge located on the lower slope of the central Cascadia convergent margin. Structural mapping based on two-dimensional and three-dimensional multichannel seismic reflection profiles and gridded bathymetry coupled with deep-towed sidescan sonar data and Ocean Drilling Program (ODP) biostratigraphy suggests that seafloor fluid venting patterns...
Resource Type:: Article
Full Text:: , CASCADIA MARGIN1 Joel E. Johnson,2,3 Chris Goldfinger,3 Anne M. Tréhu,3 Nathan L.B. Bangs,4 Marta E

Creator:: Tréhu, Anne Martine, Flemings, Peter B., Bangs, Nathan Lawrence Bailey, Chevallier, Johanna, Gracia, Eulalia, Johnson, Joel E., Liu, C. S., Liu, Xiaoli, Riedel, Michael, and Torres, Marta E.
Abstract:: Log and core data document gas saturations as high as 90% in a coarse-grained turbidite sequence beneath the gas hydrate stability zone (GHSZ) at south Hydrate Ridge, in the Cascadia accretionary complex. The geometry of this gas-saturated bed is defined by a strong, negative-polarity reflection in 3D seismic data. Because...
Resource Type:: Article
Full Text:: south Hydrate Ridge Anne M. Tréhu,1 Peter B. Flemings,2 Nathan L. Bangs,3 Johanna Chevallier,1

Creator:: Brown, K. M., Bangs, Nathan Lawrence Bailey, Froelich, Peter N., Zheng, Y., Didyk, Borys M., Prior, D., Rochford, E. L., Torres, Marta E., Kurnosov, V. B., Lindsley - Griffin, N., Osozawa, S., and Waseda, A.
Abstract:: The subduction of the oceanic spreading center at the Chile Triple Junction is marked by a substantial thermal perturbation and marked changes in the hydrogeologic and aqueous geochemical regimes in the overthrust plate. Ridge subduction substantially changes the fluid chemistry in the wedge through variably hydrating the oceanic basement, accretionary...
Resource Type:: Article
Full Text:: 980, Japan. 12 J APEX Research Center, 1-2-1 Hamada, Mihama-ku, Chiba 261, Japan. maturation or

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