Sakaguchi, Arito et al. (2011): Seismic slip propagation to the updip end of plate boundary subduction interface faults; vitrinite reflectance geothermometry on Integrated Ocean Drilling Program NanTro SEIZE cores
Leg/Site/Hole:
Related Expeditions:
IODP 316 C0004
Identifier:
ID:
2011-038856
Type:
georefid
ID:
10.1130/G31642.1
Type:
doi
Creator:
Name:
Sakaguchi, Arito
Affiliation:
Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Institute for Frontier Research on Earth Evolution (FREE), Kanagawa, Japan
Role:
author
Name:
Chester, Frederick
Affiliation:
Texas A&M University, United States
Role:
author
Name:
Curewitz, Daniel
Affiliation:
Syracuse University, United States
Role:
author
Name:
Fabbri, Olivier
Affiliation:
Universite de Franche-Comte, France
Role:
author
Name:
Goldsby, David
Affiliation:
Brown University, United States
Role:
author
Name:
Kimura, Gaku
Affiliation:
University of Tokyo, Japan
Role:
author
Name:
Li Chunfeng
Affiliation:
Tongji University, China
Role:
author
Name:
Masaki, Yuka
Affiliation:
Kochi University, Japan
Role:
author
Name:
Screaton, Elizabeth J.
Affiliation:
University of Florida, United States
Role:
author
Name:
Tsutsumi, Akito
Affiliation:
Kyoto University, Japan
Role:
author
Name:
Ujiie, Kohtaro
Affiliation:
Tsukuba University, Japan
Role:
author
Name:
Yamaguchi, Asuka
Affiliation:
Role:
author
Identification:
Title:
Seismic slip propagation to the updip end of plate boundary subduction interface faults; vitrinite reflectance geothermometry on Integrated Ocean Drilling Program NanTro SEIZE cores
Year:
2011
Source:
Geology (Boulder)
Publisher:
Geological Society of America (GSA), Boulder, CO, United States
Volume:
39
Issue:
4
Pages:
395-398
Abstract:
Seismic faulting along subduction-type plate boundaries plays a fundamental role in tsunami genesis. During the Integrated Ocean Drilling Program (IODP) Nankai Trough Seismogenic Zone Experiment (NanTro SEIZE) Stage 1, the updip ends of plate boundary subduction faults were drilled and cored in the Nankai Trough (offshore Japan), where repeated large earthquakes and tsunamis have occurred, including the A.D. 1944 Tonankai (Mw=8.1) earthquake. Samples were obtained from the frontal thrust, which connects the deep plate boundary to the seafloor at the toe of the accretionary wedge, and from a megasplay fault that branches from the plate boundary decollement. The toe of the accretionary wedge has classically been considered aseismic, but vitrinite reflectance geothermometry reveals that the two examined fault zones underwent localized temperatures of more than 380 degrees C. This suggests that frictional heating occurred along these two fault zones, and implies that coseismic slip must have propagated at least one time to the updip end of the megasplay fault and to the toe of the accretionary wedge.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:33.1300 West:136.4300 East:
136.4300 South:33.1300
Keywords: Solid-earth geophysics; accretionary wedges; cores; coseismic processes; decollement; displacements; earthquakes; faults; friction; geologic hazards; geologic thermometry; Integrated Ocean Drilling Program; IODP Site C0004; Nankai Trough; NanTroSEIZE; natural hazards; North Pacific; Northwest Pacific; Pacific Ocean; plate boundaries; plate tectonics; seismotectonics; subduction; tectonics; thrust faults; tsunamis; vitrinite reflectance; West Pacific;
.