Lin, Weiren et al. (2010): Present-day principal horizontal stress orientations in the Kumano forearc basin of the southwest Japan subduction zone determined from IODP NanTroSEIZE drilling Site C0009

Leg/Site/Hole:
IODP 319
IODP 319 C0009
Identifier:
2011-075832
georefid

10.1029/2010GL043158
doi

Creator:
Lin, Weiren
Japan Agancy for Marine-Earth Science and Technology, Kochi Institute for Core Sample Research, Nankoku, Japan
author

Doan, Mai-Linh
Universite Joseph Fourier, France
author

Moore, J. Casey
University of California at Santa Cruz, United States
author

McNeill, Lisa
University of Southampton, United Kingdom
author

Byrne, Timothy B.
University of Connecticut, United States
author

Ito, Takatoshi
Tohoku University, Japan
author

Saffer, Demian
Pennsylvania State University, United States
author

Conin, Marianne
University Aix Marseille III, France
author

Kinoshita, Masataka
University of Wisconsin-Madison, United States
author

Sanada, Yoshinori
University of Massachusetts at Amherst, United States
author

Moe, Kyaw Thu
Kyoto University, Japan
author

Araki, Eiichiro
University of Texas at Austin, United States
author

Tobin, Harold
Queensland University of Technology, Australia
author

Boutt, David
Kiel University, Germany
author

Kano, Yasuyuki
Universite de Picardie Jules Verne, France
author

Hayman, Nicholas W.
University of Michigan, United States
author

Flemings, Peter
Universite de Lausanne, Switzerland
author

Huftile, Gary J.
National Central University, Taiwan
author

Cukur, Deniz
Australian National University, Australia
author

Buret, Christophe
Florida State University, United States
author

Schleicher, Anja M.
Chiba University, Japan
author

Efimenko, Natalia
Osaka University, Japan
author

Kawabata, Kuniyo
German Research Center for Geosciences, Germany
author

Buchs, David M.
University of Bremen, Germany
author

Jiang, Shijun
author

Kameo, Koji
author

Horiguchi, Keika
author

Wiersberg, Thomas
author

Kopf, Achim
author

Kitada, Kazuya
author

Eguchi, Nobuhisa
author

Toczko, Sean
author

Takahashi, Kyoma
author

Kido, Yukari
author

Identification:
Present-day principal horizontal stress orientations in the Kumano forearc basin of the southwest Japan subduction zone determined from IODP NanTroSEIZE drilling Site C0009
2010
Geophysical Research Letters
American Geophysical Union, Washington, DC, United States
37
13
A 1.6 km riser borehole was drilled at site C0009 of the NanTroSEIZE, in the center of the Kumano forearc basin, as a landward extension of previous drilling in the southwest Japan Nankai subduction zone. We determined principal horizontal stress orientations from analyses of borehole breakouts and drilling-induced tensile fractures by using wireline logging formation microresistivity images and caliper data. The maximum horizontal stress orientation at C0009 is approximately parallel to the convergence vector between the Philippine Sea plate and Japan, showing a slight difference with the stress orientation which is perpendicular to the plate boundary at previous NanTroSEIZE sites C0001, C0004 and C0006 but orthogonal to the stress orientation at site C0002, which is also in the Kumano forearc basin. These data show that horizontal stress orientations are not uniform in the forearc basin within the surveyed depth range and suggest that oblique plate motion is being partitioned into strike-slip and thrusting. In addition, the stress orientations at site C0009 rotate clockwise from basin sediments into the underlying accretionary prism.
Coverage:Geographic coordinates:
North:33.3000
West:136.2000East: 137.0000
South:32.5000

Solid-earth geophysics; basins; boreholes; Expedition 319; fore-arc basins; fractures; Integrated Ocean Drilling Program; IODP Site C0009; Kumano Basin; Nankai Trough; NanTroSEIZE; North Pacific; Northwest Pacific; orientation; Pacific Ocean; Philippine Sea Plate; plate boundaries; plate tectonics; rotation; stress; subduction zones; well-logging; West Pacific;

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