Integrated Ocean Drilling Program Expedition 344 scientific prospectus; Costa Rica seismogenesis project, Program A Stage 2 (CRISP-A2); sampling and quantifying lithologic inputs and fluid inputs and outputs of the seismogenic zone

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doi: 10.2204/iodp.sp.344.2012
Author(s): Harris, Robert; Sakaguchi, Arito; Petronotis, Katerina
Author Affiliation(s): Primary:
Oregon State University, College of Earth, Oceanic, and Atmospheric Sciences, Corvallis, OR, United States
Japan Agency for Marine-Earth Science and Technology, Japan
Texas A&M University, United States
Source: Scientific Prospectus (Integrated Ocean Drilling Program), Vol.344, 76p. Publisher: IODP Management International, College Station, TX, United States. ISSN: 1932-9415
Note: In English. 103 refs.
Summary: The Costa Rica Seismogenesis Project (CRISP) is designed to elucidate the processes that control nucleation and seismic rupture of large earthquakes at erosional subduction zones. CRISP is located at the only known seismogenic zone at an erosional margin within reach of scientific drilling. With a low sediment supply, fast convergence rate, abundant seismicity, subduction erosion, and a change in subducting plate relief along strike, CRISP offers excellent opportunities to better understand earthquake nucleation and rupture propagation. This project complements other deep fault drilling (San Andreas Fault Observatory at Depth and Nankai Trough Seismogenic Zone Experiment) and investigates the first-order seismogenic processes common to most faults and those unique to erosional margins. Expedition 344 is based in part on CRISP Program A (Integrated Ocean Drilling Program Proposal 537A-Full5), which is the first step toward deep riser drilling through the seismogenic zone. This expedition will focus on constraining the boundary conditions of lithology, fluid flow, and thermal structure that trigger unstable slip in the seismogenic zone along a drilling transect at two slope sites. These slope sites may also serve as pilot holes for potential future proposed riser drilling to reach the aseismic/seismic plate boundary.
Year of Publication: 2012
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 19 Geophysics, Seismology; Boreholes; Caribbean Plate; Caribbean region; Central America; Cocos Plate; Costa Rica; Costa Rica Seismogenesis Project; Crust; Drilling; Earthquakes; East Pacific; Expedition 334; Expedition 344; Geophysical methods; Geophysical profiles; Geophysical surveys; IODP Site U1378; IODP Site U1379; IODP Site U1380; IODP Site U1381; Integrated Ocean Drilling Program; Marine drilling; Middle America Trench; North Pacific; Northeast Pacific; Oceanic crust; Pacific Ocean; Planning; Plate tectonics; Seismic methods; Seismic profiles; Seismicity; Subduction zones; Surveys; Vertical seismic profiles; Well logs
Coordinates: N082500 N084500 W0840000 W0841000
Record ID: 2012052274
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