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 (2012): Expedition 334 summary. IODP Management International, Washington, DC, United States, In: 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, Proceedings of the Integrated Ocean Drilling Program; Costa Rica Seismogenesis Project, Program A, Stage 1 (CRISP-A1); Expedition 334 of the riserless drilling platform from and to Puntarenas, Costa Rica; Sites U1378-U1381, 13 March-12 April 2011, 334, georefid:2012-045536

Abstract:
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 - Characterization of lithological, physical, and frictional properties of upper plate material; - Estimation of subduction channel thickness and the rate of subsidence caused by subduction erosion; - Characterization of the fluid flow system and thermal structure of the erosive margin; and - 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 riserdrilling 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 were taken at both sites to examine slope sediment and the underlying upper plate basement. Coupling LWD data with data from sediment and basement samples provides important information about tectonic, hydrologic, and seismic features along this erosive convergent margin.
Coverage:
West: -84.4002 East: -84.0202 North: 8.4051 South: 8.2543
Relations:
Expedition: 334
Site: 334-U1378
Site: 334-U1379
Site: 334-U1380
Site: 334-U1381
Expedition: 344
Site: 344-U1380
Site: 344-U1381
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.2204/iodp.proc.334.101.2012 (c.f. for more detailed metadata)
Data download: application/pdf
This metadata in ISO19139 XML format