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Title

NanTroSEIZE Stage 3: NanTroSEIZE Plate Boundary Deep Riser 3 Expedition 348

AuthorsTobin, H.; Hirose, T.; Saffer, D.; Toczko, S.; Maeda, L.; Kubo, Y.; Boston, B.; Broderick, A.; Brown, K.; Crespo-Blanc, A.; Even, E.; Fuchida, S.; Fukuchi, R.; Hammerschmidt, S.; Henry, P.; Josh, M.; Jurado, Maria José ; Kitajima, H.; Kitamura, M.; Maia, A.; Otsubo, M.; Sample, J.; Schleicher, A.; Sone, H.; Song, C.; Valdez, R.; Yamamoto, Y.; Yang, K.; Sanada, Y.; Kido, Y.; Hamada, Y.
Issue Date2015
PublisherIntegrated Ocean Drilling Program
CitationNanTroSEIZE Stage 3: NanTroSEIZE Plate Boundary Deep Riser 3Expedition 348 (2015)
AbstractThe Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) is a multidisciplinary investigation of fault mechanics and seismogenesis along subduction megathrusts and includes reflection and refraction seismic imaging, direct sampling by drilling, in situ measurements, and long-term monitoring in conjunction with laboratory and numerical modeling studies. The fundamental objectives of NanTroSEIZE are to characterize the nature of fault slip and strain accumulation, fault and wall rock composition, fault architecture, and state variables throughout an active plate boundary system. As part of the NanTroSEIZE program, operations during Integrated Ocean Drilling Program (IODP) Expedition 348 were planned to extend and case riser Hole C0002F, begun during IODP Expedition 326 in 2010 and continued during Expedition 338 in 2012, from 860 to 3600 meters below the seafloor (mbsf). Riser operations during Expedition 348 were carried out and deepened the hole to 3058 mbsf, a new maximum depth record in scientific ocean drilling. Operations included installation and cementing of 13⅜ inch casing to 2008.9 mbsf and an 11¾ inch liner to 2922.5 mbsf, stabilizing the borehole for future deepening. Reaching this depth required two sidetracking operations from the original Hole C0002F, resulting in the designation of Holes C0002N and C0002P for the successively deeper sidetracks. During drilling, a suite of logging-while-drilling (LWD) and measurement-while-drilling (MWD), mud-gas, and cuttings data were collected over the interval from 2162.5 to 3058.5 mbsf in Hole C0002P, and a partial suite was collected in Hole C0002N. The interval from 2163 to 2218 mbsf was cored with the rotary core barrel (RCB). Planned future riser drilling operations will deepen the hole to penetrate the plate boundary fault at ~4600–5200 mbsf.
URIhttp://hdl.handle.net/10261/181881
Identifiersdoi: 10.2204/iodp.proc.348.101.2015
issn: 1930–1014
Appears in Collections:(ICTJA) Comunicaciones congresos
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