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Subsurface temperatures beneath Southern Hydrate Ridge

Creator:: Tréhu, Anne Martine
Abstract:: During Ocean Drilling Program Leg 204, 80 in situ measurements of subseafloor temperature were made; 68 of these showed good frictional pulses on insertion and extraction from the seafloor and were used to constrain the subsurface temperature. Considering uncertainties from various sources, uncertainties in the in situ temperatures are estimated...
Resource Type:: Article
Full Text:: the sediment derived from a variety of different gas hydrate proxies (Tréhu et al., 2004a). Gas

Near-offset vertical seismic experiments during leg 204

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:: ) D ep th ( m sb f) 2%-4% 4%-10%30%-40% B A F1. Drilling sites, p. 12. A.M. TRÉHU ET AL

Leg 204 synthesis : gas hydrate distribution and dynamics in the Central Cascadia accretionary complex

Creator:: Tréhu, Anne Martine, Torres, Marta E., Bohrmann, G., and Colwell, Frederick
Abstract:: Ocean Drilling Program (ODP) Leg 204 to Hydrate Ridge, located on the continental slope offshore Oregon (USA), was the first drilling expedition dedicated to understanding gas hydrate processes in accretionary complexes and provided a testbed for a number of different techniques for estimating the gas hydrate content of sediments. It...
Resource Type:: Article
Full Text:: nc e (k m ) F5. Horizon A properties, p. 30. A.M. TRÉHU ET AL. LEG 204 SYNTHESIS: GAS HYDRATE

Seismic sequence stratigraphy and tectonic evolution of Southern Hydrate Ridge

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

North-south variability in the history of deformation and fluid venting across Hydrate Ridge, Cascadia margin

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:: ., Pfannkuche, O., Tréhu, A., Klinkhammer, G., Whiticar, M.J., Eisenhauer, A., Teichert, B., and Elvert, M

A 3-D Tomographic Model of the P-wave Velocity Structure of the Central Cascadia Forearc

Creator:: Kenyon, Christopher Bradford
Abstract:: Signals from the R/V Langseth’s tuned airgun array were recorded on an array of 33 EarthScope FlexArray seismometers deployed in the Oregon Coast Range from 43.5° to 45°N as part of the 2012 Ridge2Trench experiment to image the structure of the Juan de Fuca plate. This segment of the Juan...
Resource Type:: Masters Thesis
Full Text:: Anne M. Tréhu Signals from the R/V Langseth’s tuned airgun array were recorded on an array

Seismicity at the Cascadia plate boundary beneath the Oregon continental shelf

Creator:: Williams, Mark Charles
Abstract:: Since 2003, 39 small earthquakes have been detected offshore central Oregon in the nominally locked part of the Cascadia subduction zone, where very little seis- mic activity has been recorded in spite of a paleo-seismic record of great subduction events. Although the regional earthquake bulletin reports depths of 29 and...
Resource Type:: Masters Thesis
Full Text:: further north is later- ally continuous and present at the southern cluster location. Tréhu et al. (A. M

Two Advances in Practical Alternative Energy: Thermotolerant Hydrogenase Concentration and Methane Hydrate Grain Size Proxies.

Creator:: Sullivan, Nichole D.
Abstract:: Methane hydrates and biohydrogen are two disparate subjects that are of interest in the growing field of alternative energy research. However, before commercial use becomes a viable option, each has challenges that need to be overcome. Methane hydrates require large investments of time and capital to locate. In this thesis,...
Resource Type:: Honors College Thesis
Full Text:: medium in a constant-temperature room under continuous light at 30 µE m-2 s-1. The culture was purged

Finite difference wavefield modeling of large-aperture data from the 1993 Mendocino Triple Junction Seismic Experiment

Creator:: Lendl, Christof
Abstract:: This thesis presents elastic finite difference simulations of two dimensional wavefield propagation for line-9, recorded during the 1993 part of the multi-institutional, multi-year Mendocino Triple Junction (MTJ) Seismic Experiment. Line-9 is a high-resolution, large-aperture seismic profile oriented in north-south direction, extending from the subduction regime north of the MTJ to...
Resource Type:: Masters Thesis
Full Text:: ACKNOWLEDGMENT My first thanks go to my advisor Anne Tréhu, who has been a continuous source of support and

Structure of the crust beneath Lake Superior from forward modeling of large aperture seismic data

Creator:: Shay, John T.
Abstract:: Both travel times and amplitudes of large offset refracted and reflected arrivals observed during GLIMPCE (Great Lakes International Multidisciplinary Program on Crustal Evolution) along line A in Lake Superior have been modeled using two-dimensional ray tracing techniques. Forward modeling was used to iteratively refine an initial velocity model that was...
Resource Type:: Masters Thesis
Full Text:: - 8904413 awarded to Dr. A. M. Trehu. With completion of this work in sight, I fmally get to treat myself

ScholarsArchive@OSU

Subsurface temperatures beneath Southern Hydrate Ridge

Near-offset vertical seismic experiments during leg 204

Leg 204 synthesis : gas hydrate distribution and dynamics in the Central Cascadia accretionary complex

Seismic sequence stratigraphy and tectonic evolution of Southern Hydrate Ridge

North-south variability in the history of deformation and fluid venting across Hydrate Ridge, Cascadia margin

A 3-D Tomographic Model of the P-wave Velocity Structure of the Central Cascadia Forearc

Seismicity at the Cascadia plate boundary beneath the Oregon continental shelf

Two Advances in Practical Alternative Energy: Thermotolerant Hydrogenase Concentration and Methane Hydrate Grain Size Proxies.

Finite difference wavefield modeling of large-aperture data from the 1993 Mendocino Triple Junction Seismic Experiment

Structure of the crust beneath Lake Superior from forward modeling of large aperture seismic data

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