Chairs: Ake Fagereng, University of Cape Town, Department of Geological Sciences, Cape Town, South Africa, Matt Ikari, MARUM - University of Bremen, Bremen, Germany, Laura M Wallace, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States and Kohtaro Ujiie, University of Tsukuba, Tsukuba, Japan
Primary Conveners: Ake Fagereng, University of Cape Town, Department of Geological Sciences, Cape Town, South Africa; Cardiff University, School of Earth and Ocean Sciences, Cardiff, United Kingdom
Co-conveners: Matt Ikari, MARUM, University of Bremen, Bremen, Germany, Kohtaro Ujiie, University of Tsukuba, Tsukuba, Japan and Laura M Wallace, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States
OSPA Liaisons: Ake Fagereng, University of Cape Town, Department of Geological Sciences, Cape Town, South Africa
Microscale Relationships Between Fault Rock Fabric and Structural Style in Megathrusts – Observations from Tohoku-Oki Via J-Fast.
Virginia G Toy, University of Otago, Dunedin, New Zealand, Ake Fagereng, University of Cape Town, Department of Geological Sciences, Cape Town, South Africa, James D Kirkpatrick, Colorado State University, Fort Collins, CO, United States, Francesca Remitti, University of Modena and Reggio Emilia, Modena, Italy, Christie D Rowe, McGill University, Montreal, QC, Canada, Kohtaro Ujiie, University of Tsukuba, Tsukuba, Japan and Monica Wolfson-Schwehr, University of New Hampshire Main Campus, Durham, NH, United States
Boron Isotope Constraints on Fluid-Rock Interactions in the Shallow Megathrust at the Japan Trench
Tsuyoshi Ishikawa, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Jun Matsuoka, Marine Works Japan Ltd., Kochi, Japan, Jun Kameda, The University of Tokyo, Tokyo, Japan, James C Sample, Northern Arizona University, Flagstaff, AZ, United States, James J Mori, Kyoto University, Kyoto, Japan and Frederick M Chester, Texas A & M University, Geology & Geophysics, College Station, TX, United States
Studying Near-Trench Characteristics of the 2011 Tohoku-Oki Megathrust Rupture Using Differential Multi-Beam Bathymetry before and after the Earthquake
Tianhaozhe Sun1, Toshiya Fujiwara2, Shuichi Kodaira3, Kelin Wang1,4 and Jiangheng He4, (1)School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada, (2)R&D Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan, (3)R&D Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan, (4)Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada
Incoming sediments and its deformation observed on high resolution seismic profiles in the northern Japan Trench axis region
Yasuyuki Nakamura1, Shuichi Kodaira1, Mikiya Yamashita1, Seiichi Miura1, Gou Fujie1, Michael Strasser2, Ken Ikehara3, Toshiya Kanamatsu4 and Kazuko Usami3, (1)Japan Agency for Marine-Earth Science and Technology, R&D Center for Earthquake and Tsunami, Yokohama, Japan, (2)ETH Zurich, Zurich, Switzerland, (3)Marine Geology Research Group, Geological Survey of Japan, AIST, Tsukuba, Japan, (4)Japan Agency for Marine-Earth Science and Technology, R&D Center for Earthquake and Tsunami, Yokosuka, Japan
JDASH – Japan Trench Deep-sea Research for Assessing Shallow Seismic Slips and Their History
Ryota Hino, Tohoku University, International Research Institute of Disaster Science, Sendai, Japan, Shuichi Kodaira, IFREE JAMSTEC, Yokohama, Japan, Toshiya Kanamatsu, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Masanao Shinohara, University of Tokyo, Bunkyo-ku, Japan and Yoshihiro Ito, Kyoto University, Kyoto, Japan
Drilling into the deep interior of the Nankai accretionary prism: Preliminary results of IODP NanTroSEIZE Expedition 348
Takehiro Hirose, JAMSTEC, Kochi Institute for Core Sample Research, Nankoku City, Kochi, Japan, Harold J Tobin, University of Wisconsin Madison, Madison, WI, United States, Demian M Saffer, Pennsylvania State University, University Park, PA, United States, Sean Toczko, JAMSTEC Japan Agency for Marine-Earth Science and Technology, CDEX, Kanagawa, Japan and Lena Maeda, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
Physical properties of the Nankai inner accretionary prism sediments at Site C0002, IODP Expedition 348.
Manami Kitamura, Hiroshima University, Higashi-Hiroshima, Japan, Hiroko Kitajima, Texas A & M University, College Station, TX, United States, Pierre Henry, CEREGE - Col France, Aix-En-Provence, France, Robert D Valdez, II, Pennsylvania State University, State College, PA, United States, Matthew Josh, CSIRO Earth Science and Resource Engineering Perth, Perth, WA, Australia, Harold J Tobin, University of Wisconsin Madison, Madison, WI, United States, Demian M Saffer, Pennsylvania State University, University Park, PA, United States, Takehiro Hirose, JAMSTEC, Kochi Institute for Core Sample Research, Nankoku City, Kochi, Japan, Sean Toczko, JAMSTEC Japan Agency for Marine-Earth Science and Technology, CDEX, Kanagawa, Japan and Lena Maeda, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
Stress-state and micro-scale deformations in the hangingwall of the splay fault: Preliminary results from the Site C0002, IODP Expedition 348
Yuzuru Yamamoto1, Weiren Lin1, Yuhji Yamamoto2, Kevin M Brown3, Ana Crespo-Blanc4, Makoto Otsubo5, Hiroki Sone6, Pierre Henry7 and Expedition 348 Scientists8, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Kochi University, Kochi, Japan, (3)Scripps Institution of Oceanography, La Jolla, CA, United States, (4)University of Granada, Granada, Spain, (5)Tsukuba, Japan, (6)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (7)CEREGE - Col France, Aix-En-Provence, France, (8)Texas A & M University, College Station, TX, United States
Wellbore failures and its constraints on the in-situ stress state in the Nankai Trough accretionary prism, Site C0002, IODP Expedition 348
Hiroki Sone1, Maria Jose Jurado2, Brian Boston3, Yuzuru Yamamoto4, Harold J Tobin5, Demian M Saffer6 and Takehiro Hirose4, (1)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (2)Inst de Ciencias de la Tierra, Barcelona, Spain, (3)University of Hawaii at Manoa, Honolulu, HI, United States, (4)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (5)University of Wisconsin Madison, Madison, WI, United States, (6)Pennsylvania State University, University Park, PA, United States
Paleostress analysis of a subduction zone megasplay fault - An example from the Nobeoka Thrust, Japan
Ryoji Kawasaki1, Mari Hamahashi1, Yoshitaka Hashimoto2, Makoto Otsubo3, Asuka Yamaguchi1, Yujin Kitamura4, Jun Kameda5, Yohei Hamada6, Rina Fukuchi1 and Gaku Kimura1, (1)University of Tokyo, Bunkyo-ku, Japan, (2)University of Kochi, Kochi, Japan, (3)Tsukuba, Japan, (4)Kagoshima University, Kagoshima, Japan, (5)Hokkaido University, Sapporo, Japan, (6)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
Deformation-induced diagenesis and microbial activity in the Nankai accretionary prism
Vincent Famin1,2, Muriel Andreani3, Anne-Marie Boullier4, Hugues Raimbourg5 and Valerie Magnin4, (1)Institut de Physique du Globe de Paris, Paris, France, (2)Université de La Réunion, Laboratoire Géosciences-IPGP, 97744 Saint Denis, France, (3)University Claude Bernard Lyon 1, Villeurbanne, France, (4)ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, (5)ISTO Institut des Sciences de la Terre d'Orléans, Orléans Cedex 2, France
Ten Years of Slow Slip Events Observed by cGPS Network in the Nicoya Peninsula, Costa Rica
Yan Jiang, Geological Survey of Canada Pacific, Vancouver, BC, Canada, Robert McCaffrey, Portland State University, Portland, OR, United States, Timothy H Dixon, University of South Florida Tampa, Tampa, FL, United States, Rocco Malservisi, University of South Florida, Tampa, FL, United States and Marino Protti, Observatorio Vulcanológico y Sismológico de Costa Rica, Heredia, Costa Rica
Physical property and Textural transition across the Unconformity and Major Seismic Reflectors in the Upper plate of the Costa Rica Subduction zone offshore Osa Peninsula
Mari Hamahashi1, Elizabeth Screaton2, Wataru Tanikawa3, Yoshitaka Hashimoto4, Kylara M Martin5, Saneatsu Saito3 and Gaku Kimura1, (1)University of Tokyo, Bunkyo-ku, Japan, (2)Univ Florida, Gainesville, FL, United States, (3)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (4)University of Kochi, Kochi, Japan, (5)Naval Research Laboratory, Stennis Space Center, MS, United States
Structural interpretation and physical property estimates based on COAST 2012 seismic reflection profiles offshore central Washington, Cascadia subduction zone
Susanna I Webb1, Harold J Tobin1, Erik D Everson2, Will Fortin3, W Steven Holbrook2, Graham Kent4 and Katie M Keranen5, (1)University of Wisconsin Madison, Madison, WI, United States, (2)Univ Wyoming, Laramie, WY, United States, (3)University of Wyoming, Laramie, WY, United States, (4)Organization Not Listed, Washington, DC, United States, (5)Cornell University, Ithaca, NY, United States
Detailed Velocity and Density models of the Cascadia Subduction Zone from Prestack Full-Waveform Inversion
Will Fortin1, W Steven Holbrook2, Subhashis Mallick1, Erik D Everson2, Harold J Tobin3 and Katie M Keranen4, (1)University of Wyoming, Laramie, WY, United States, (2)Univ Wyoming, Laramie, WY, United States, (3)University of Wisconsin Madison, Madison, WI, United States, (4)Cornell University, Ithaca, NY, United States
Numerical Experiments Into the Style of Accretion and Megathrust Behavior Along the Hikurangi Margin, New Zealand
Susan M Ellis1, Francesca Ghisetti2, Philip Barnes3, Agnes G Reyes1, Ake Fagereng4, Francis Henrys5, Daniel H N Barker1 and Stuart A Henrys1, (1)GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, (2)TerraGeologica, Christchurch, New Zealand, (3)NIWA National Institute of Water and Atmospheric Research, Wellington, New Zealand, (4)University of Cape Town, Department of Geological Sciences, Cape Town, South Africa, (5)Victoria University of Wellington, School of Geography, Environment and Earth Sciences, Wellington, New Zealand
Coulomb stress variations associated with slow slip, tectonic tremor, and seismicity along the northern Hikurangi Margin, New Zealand
Erin K Todd, University of California Santa Cruz, Santa Cruz, CA, United States, Charles A Williams, GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, Stephen C Bannister, GNS Science, Lower Hutt, New Zealand, Susan Y Schwartz, University of California-Santa Cruz, Santa Cruz, CA, United States and Laura M Wallace, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States
Transient crustal deformation due to slow slip observed on ocean bottom pressure recorders in the Hikurangi margin
Yoshihiro Ito1, Laura M Wallace2, Stuart A Henrys3, Kimihiro Mochizuki4, Charles A Williams3, Ryota Hino5, Hiroshi Ichihara6, Daisuke Inazu7, Syuichi Suzuki8, Takeo Yagi4, Tatsuya Kubota9, Daisuke Haijima10, Bill Fry3 and Stephen C Bannister11, (1)Kyoto University, Kyoto, Japan, (2)University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, (3)GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, (4)University of Tokyo, Bunkyo-ku, Japan, (5)Tohoku University, International Research Institute of Disaster Science, Sendai, Japan, (6)JAMSTEC, Yokosuka, Japan, (7)NIED National Research Institute for Earth Science and Disaster Prevention, Tsukuba, Japan, (8)Tohoku Univ, Sendai, Japan, (9)Tohoku Univ., Sendai, Japan, (10)Earthquake Research Institute, University of Tokyo, Arakawa-ku, Japan, (11)GNS Science, Lower Hutt, New Zealand
Contrasting slip zone mineralogy of major thrusts in ancient subduction complexes: examples from the Pasagshak Point Thrust in Alaska and the Nobeoka Thrust in Japan
Asuka Yamaguchi1, Rina Fukuchi1, Koichiro Fujimoto2, Tsuyoshi Ishikawa3, Yasuhiro Kato4, Tatsuo Nozaki5, Francesca Meneghini6, Christie D Rowe7, Casey Moore8, Akito Tsutsumi9 and Gaku Kimura4, (1)Atmosphere and Ocean Research Institute University of Tokyo, Tokyo, Japan, (2)Tokyo Gakugei University, Koganei, Japan, (3)JAMSTEC, Nankoku, Kochi, Japan, (4)University of Tokyo, Bunkyo-ku, Japan, (5)JAMSTEC, Yokosuka Kanagawa, Japan, (6)University of Pisa, PISA, Italy, (7)McGill University, Montreal, QC, Canada, (8)University of California Santa Cruz, Santa Cruz, CA, United States, (9)Kyoto University, Kyoto, Japan
