Search Results - "Keir Becker"

The Deep, Dark Energy Biosphere: Intraterrestrial Life on Earth by Edwards, Katrina J, Becker, Keir, Colwell, Frederick

“…Most ecosystems on Earth exist in permanent darkness, one or more steps removed from the light-driven surface world. This collection of dark habitats is the…”
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Long‐Term Offshore Borehole Fluid‐Pressure Monitoring at the Northern Cascadia Subduction Zone and Inferences Regarding the State of Megathrust Locking by Davis, Earl E., Sun, Tianhaozhe, Heesemann, Martin, Becker, Keir, Schlesinger, Angela

“…The Cascadia subduction megathrust off the Pacific Northwest follows an “end member” seismogenic behavior, producing large (up to moment magnitude 9) but…”
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Subseafloor Cross‐Hole Tracer Experiment Reveals Hydrologic Properties, Heterogeneities, and Reactions in Slow‐Spreading Oceanic Crust by C. Geoffrey Wheat, Keir Becker, Heinrich Villinger, Beth N. Orcutt, Trevor Fournier, Anne Hartwell, Claudia Paul

“…Abstract The permeability, connectivity, and reactivity of fluid reservoirs in oceanic crust are poorly constrained, yet these reservoirs are pathways for…”
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Colonization of subsurface microbial observatories deployed in young ocean crust by Orcutt, Beth N, Bach, Wolfgang, Becker, Keir, Fisher, Andrew T, Hentscher, Michael, Toner, Brandy M, Wheat, C Geoffrey, Edwards, Katrina J

“…Oceanic crust comprises the largest hydrogeologic reservoir on Earth, containing fluids in thermodynamic disequilibrium with the basaltic crust. Little is…”
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Episodic deformation and inferred slow slip at the Nankai subduction zone during the first decade of CORK borehole pressure and VLFE monitoring by Davis, Earl, Kinoshita, Masataka, Becker, Keir, Wang, Kelin, Asano, Youichi, Ito, Yoshihiro

“…With new data recovered in December 2011 and November 2012 from two Ocean Drilling Program (ODP) CORK (circulation obviation retrofit kit) borehole…”
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A Long-Term Geothermal Observatory Across Subseafloor Gas Hydrates, IODP Hole U1364A, Cascadia Accretionary Prism by Becker, Keir, Davis, Earl E., Heesemann, Martin, Collins, John A., McGuire, Jeffrey J.

“…We report 4 years of temperature profiles collected from May 2014 to May 2018 in Integrated Ocean Drilling Program Hole U1364A in the frontal accretionary…”
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Geothermal heating and episodic cold-seawater intrusions into an isolated ridge-flank basin near the Mid-Atlantic Ridge by Becker, Keir, Thomson, Richard E., Davis, Earl E., Villinger, Heinrich, Wheat, C. Geoffrey

“…Six-year records of ocean bottom water temperatures at two locations in an isolated, sedimented deep-water (∼4500 m) basin on the western flank of the…”
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A discrete episode of seismic and aseismic deformation of the Nankai trough subduction zone accretionary prism and incoming Philippine Sea plate by Davis, Earl E., Becker, Keir, Wang, Kelin, Obara, Kazushige, Ito, Yoshihiro, Kinoshita, Masataka

“…New insights into episodic deformation at the Nankai trough subduction zone are provided by data from two Ocean Drilling Program borehole hydrologic…”
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Thermally stimulated "runaway" downhole flow in a superhydrostatic ocean crustal borehole: Observations, simulations, and inferences regarding crustal permeability by Davis, Earl E., LaBonte, Alison, He, Jiangheng, Becker, Keir, Fisher, Andrew

“…An array of boreholes, drilled through a regionally continuous hydrologically confining layer of sediments into extrusive igneous basement rocks of the Juan de…”
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Co-seismic and post-seismic pore-fluid pressure changes in the Philippine Sea plate and Nankai decollement in response to a seismogenic strain event off Kii Peninsula, Japan by Davis, Earl, Becker, Keir, Wang, Kelin, Kinoshita, Masa

“…New pressure data from a pair of Ocean Drilling Program (ODP) hydrologic borehole observatories at ODP Sites 1173 and 808, located off Japan in the subducting…”
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Borehole observations of fluid flow from South Chamorro Seamount, an active serpentinite mud volcano in the Mariana forearc by Wheat, C. Geoffrey, Fryer, Patricia, Fisher, Andrew T., Hulme, Samuel, Jannasch, Hans, Mottl, Michael J., Becker, Keir

“…A sealed borehole observatory (CORK) was deployed on South Chamorro Seamount, an active serpentinite mud volcano in the Mariana forearc to explore…”
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New evidence for age variation and scale effects of permeabilities of young oceanic crust from borehole thermal and pressure measurements by Becker, Keir, Davis, Earl E.

“…In 1996, long-term sealed-hole hydrological observatories with subseafloor temperature and pressure sensors were installed in four cased holes drilled by the…”
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On the fidelity of CORK borehole hydrologic observatory pressure records by DAVIS, Earl, BECKER, Keir

“…Long-term formation pressure monitoring in Ocean Drilling Program (ODP) and Integrated Ocean Drilling Program (IODP) boreholes using evolving Circulation…”
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CORK-Lite: Bringing Legacy Boreholes Back to Life by GEOFFREY WHEAT, C, EDWARDS, Katrina J, PETTIGREW, Tom, JANNASCH, Hans W, BECKER, Keir, DAVIS, Earl E, VILLINGER, Heiner, BACH, Wolfgang

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Temperature and video logs from the upper oceanic crust, Holes 504B and 896A, Costa Rica Rift flank: implications for the permeability of upper oceanic crust by Becker, Keir, Davis, Earl E., Spiess, Fred N., deMoustier, Christian P.

“…In 2001, we revisited thickly sedimented 5.9 Ma crust on the southern flank of the Costa Rica Rift for wireline re-entry of two important ocean crustal…”
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Permeability of a decollement zone: Results from a two-well experiment in the Barbados accretionary complex by Screaton, Elizabeth, Carson, Bobb, Davis, Earl, Becker, Keir

“…Fault zones are hypothesized to play a major role in focusing fluid expulsion from accretionary complexes. A small number of previous investigations have…”
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IODP Expedition 327 and Atlantis Expedition AT 18-07: Observatories and Experiments on the Eastern Flank of the Juan de Fuca Ridge by FISHER, Andrew T, TSUJI, Takeshi, PETRONOTIS, Katerina, GEOFF WHEAT, C, BECKER, Keir, CLARK, Jordan F, COWEN, James, EDWARDS, Katrina, JANNASCH, Hans

“…Integrated Ocean Drilling Program (IODP) Expedition 327 (summer 2010) was designed to resolve the nature of fluid-rock interactions in young, upper volcanic…”
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Deep-ocean temperature variations and implications for errors in seafloor heat flow determinations by Davis, Earl E., Wang, Kelin, Becker, Keir, Thomson, Richard E., Yashayaev, Igor

“…The accuracy with which seafloor heat flow is determined depends on the temporal stability of bottom water temperature. Indirect tests for stability are…”
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A Lack of Dynamic Triggering of Slow Slip and Tremor Indicates That the Shallow Cascadia Megathrust Offshore Vancouver Island Is Likely Locked by McGuire, Jeffrey J., Collins, John A., Davis, Earl, Becker, Keir, Heesemann, Martin

“…Great subduction zone earthquakes vary considerably in the updip extent of megathrust rupture. It is unclear if this diversity reflects variations in…”
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50 Years of Scientific Ocean Drilling by Becker, Keir, Austin, James A., Exon, Neville, Humphris, Susan, Kastner, Miriam, McKenzie, Judith A., Miller, Kenneth G., Suyehiro, Kiyoshi, Taira, Asahiko

“…Nearly a century after the first systematic study of the global ocean and seafloor by HMS Challenger (1871–1876), US scientists began to drill beneath the…”
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