Integrated Ocean Drilling Program Expedition 334 preliminary report; Costa Rica Seismogenesis Project (CRISP); sampling and quantifying input to the seismogenic zone and fluid output; 13 March-12 April 2011

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doi: 10.2204/
Author(s): Vannucchi, Paola; Ujiie, Kohtaro; Stroncik, Nicole; Malinverno, Alberto; Arroyo, Ivonne; Barckhausen, Udo; Conin, Marianne J.; Foley, Susan Murr; Formolo, Michael J.; Harris, Robert N.; Heuret, Arnauld; Huftile, Gary J.; Kameda, Jun; Kim, Gil Young; Kutterolf, Steffen; Martino, Amanda J.; McCay, Gillian A.; Nuzzo, Marianne; Ohkushi, Ken'ichi; Saito, Saneatsu; Sak, Peter B.; Solomon, Evan A.; Stipp, Michael; Torres, Marta E.; Tsutsumi, Akito; Uno, Masaoki; Usui, Yoichi; Vadakkeyakath, Yatheesh; Yamamoto, Yuzuru; Zhao, Xixi; Zhu Junjiang
Integrated Ocean Drilling Program, Expedition 334 Scientists, College Station, TX
Author Affiliation(s): Primary:
University of Florence, Earth Science Department, Florence, Italy
University of Tsukuba, Japan
Integrated Ocean Drilling Program, United States
Lamont-Doherty Earth Observatory, United States
Leibniz Institute for Marine Sciences, Germany
Federal Institute for Geosciences and Natural Resources, Germany
CNRS/Centre Européen de Recherche et d'Enseignement Géosciences de l'Environnement, France
Florida State University, United States
University of Tulsa, United States
Oregon State University, United States
Université de Montpellier II, France
Queensland University of Technology, Australia
University of Tokyo, Japan
Korea Institute of Geoscience and Mineral Resources, South Korea
Pennsylvania State University, United States
University of Edinburgh, United Kingdom
Geological Survey of Portugal, Portugal
Kobe University, Japan
Japan Agency for Marine-Earth Science and Technology, Japan
Dickinson College, United States
University of Washington, United States
Kyoto University, Japan
Tokyo Institute of Technology, Japan
AIST/Geological Survey of Japan, Japan
National Institute of Oceanography, India
University of California-Santa Cruz, United States
Chinese Academy of Sciences, South China Sea Institute of Oceanology, China
Source: Preliminary Report (Integrated Ocean Drilling Program), Vol.334, 78p. Publisher: IODP Management International, College Station, TX, United States. ISSN: 1932-9423
Note: In English. 112 refs.
Summary: Integrated Ocean Drilling Program Expedition 334, also known as the Costa Rica Seismogenesis Project (CRISP), was designed to understand the processes that control nucleation and seismic rupture of large earthquakes at erosional subduction zones. CRISP involved the only known erosional end-member of convergent margins within reach of scientific drilling. With a relatively thin sediment cover, fast convergence rate, abundant seismicity, subduction erosion, and change in subducting plate relief along strike, CRISP offered excellent opportunities to learn the causes of 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. The primary goals of Expedition 334 were 1. Characterization of lithological, physical, and frictional properties of upper plate material; 2. Estimation of subduction channel thickness and the rate of subsidence caused by subduction erosion; 3. Characterization of the fluid flow system and thermal structure of the erosive margin; and 4. Determination of the change in the stress field across the updip limit of the seismogenic zone. In order to accomplish these objectives, coring was conducted at three slope sites (Sites U1378 and U1380 on the middle slope and Site U1379 on the upper slope) and at one site on the Cocos plate (Site U1381). Expedition 334 is also the first step toward deep riser drilling through the aseismic and seismic plate boundary; both slope sites might serve as pilot holes for a potential future riser drilling project. Sites U1378 and U1379 were first characterized by logging while drilling (LWD) to document in situ physical properties, stratigraphic and structural features, and stress state, in addition to continuous core sampling to the target depth. Cores at both sites were taken to examine slope sediments and the underlying upper plate basement. The coupling of LWD data with data from sediment and basement samples provides important information about tectonic, hydrologic, and seismic features along this erosive convergent margin.
Year of Publication: 2011
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; 19 Geophysics, Seismology; Algae; Basalts; Basement; Biostratigraphy; Boreholes; CRISP; Caribbean Plate; Caribbean region; Cenozoic; Central America; Chemostratigraphy; Chronostratigraphy; Cocos Plate; Cores; Costa Rica; Costa Rica Seismogenesis Project; Crust; Drilling; Earthquakes; East Pacific; Epicenters; Expedition 334; Foraminifera; Genesis; Geochemistry; Hydrochemistry; IODP Site U1378; IODP Site U1379; IODP Site U1380; IODP Site U1381; Igneous rocks; Integrated Ocean Drilling Program; Invertebrata; Lithostratigraphy; Magnetostratigraphy; Marine drilling; Marine sediments; Microfossils; Nannofossils; Neogene; North Pacific; Northeast Pacific; Oceanic crust; Pacific Ocean; Physical properties; Plantae; Plate convergence; Plate tectonics; Pore water; Protista; Quaternary; Sediments; Subduction; Subduction zones; Tephrostratigraphy; Tertiary; Volcanic rocks; Well logs
Coordinates: N083432 N083532 W0840438 W0840438
N084051 N084051 W0840201 W0840201
N083600 N083600 W0844024 W0844024
N082543 N082543 W0840928 W0840928
Record ID: 2011055249
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