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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:: DEFORMATION AND FLUID VENTING ACROSS HYDRATE RIDGE, CASCADIA MARGIN Tréhu, A.M., Bohrmann, G., Torres, M.E

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:: OF SOUTHERN HYDRATE RIDGE Tréhu, A.M., Bohrmann, G., Torres, M.E., and Colwell, F.S. (Eds

Creator:: Chevallier, Johanna
Abstract:: A 3D seismic volume was acquired summer 2000 over the southern end of Hydrate Ridge (FIR), an anomalously shallow ridge 100 km offshore Newport, Oregon. The survey followed a succession of scientific expeditions aimed at studying the gas hydrates present in the shallow subsurface that gave the name to the...
Resource Type:: Masters Thesis
Full Text:: aimed at understanding fluid flow in accretionary prisms (e.g. Bohrmann et al., 1998, Trehu et al

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:: . Wallmann, A. M. Tréhu, G. Bohrmann, W. S. Borowski, and H. Tomaru (2004), Gas hydrate dynamics at the

Creator:: Tréhu, Anne Martine, Stakes, Debra S., Bartlett, Cindy D., Chevallier, Johanna, Duncan, Robert A., Goffredi, Shana K., Potter, Susan M., and Salamy, Karen A.
Abstract:: Seismic data and seafloor samples indicate the presence of free gas, gas hydrate, and fluid seeps south of the Gorda Escarpment, a topographic feature that marks the eastern end of the Gorda/Pacific transform plate boundary southwest of Cape Mendocino, California. In spite of high sedimentation rates and high biological productivity,...
Resource Type:: Article

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