T028
Interplay between structure, fluids, and deformation processes at subduction zones

Session ID#: 75877

Session Description:
Deformation processes at subduction zones span a vast range of spatial and temporal scales and contribute to the long-term margin evolution and mass transport through the earthquake cycle and beyond. Individual earthquakes and slow slip events involve complex patterns of deformation and fluid effects. Various modes of elastic, viscous, and plastic deformation shape the structure across the plate boundary fault zone, and within both the upper and lower plates during individual events and over longer timescales. Numerous recent onshore and offshore investigations have connected fault slip, fault zone and wall rock properties, and highlight the interplay between structure, fluids, and deformation processes in the subduction system. In this session, we invite contributions studying the key controls of subduction zone deformation, structural evolution, the role of fluids, and the associated geohazards. Multi-disciplinary contributions from geological, geophysical, and laboratory experimental studies, as well as modeling studies that integrate observations, are all welcome.
Index Terms:

8045 Role of fluids [STRUCTURAL GEOLOGY]
8118 Dynamics and mechanics of faulting [TECTONOPHYSICS]
8163 Rheology and friction of fault zones [TECTONOPHYSICS]
8170 Subduction zone processes [TECTONOPHYSICS]

Primary Convener:  Shuoshuo Han, University of Texas Institute for Geophysics, Austin, TX, United States
Conveners:  Tianhaozhe Sun, Pennsylvania State University, Department of Geosciences, University Park, United States, Laura M Wallace, University of Texas Institute for Geophysics, Austin, United States; GNS Science, Lower Hutt, New Zealand and Christie D Rowe, McGill University, Montreal, QC, Canada
Primary Liaison:  Shuoshuo Han, University of Texas Institute for Geophysics, Austin, TX, United States
 
Elastic wave constraints on fluid migration along a shear zone above the inter-plate boundary in the northern Cascadia subduction zone (485501)
Andrew J Calvert1, Genevieve Savard2 and Michael G Bostock2, (1)Simon Fraser University, Burnaby, BC, Canada, (2)University of British Columbia, Vancouver, BC, Canada
 
Sediment compaction and fluid processes in the Nankai Trough forearc inferred from teleseismic body waves (487154)
Takeshi Akuhara, The University of Tokyo, Earthquake Research Institute, Tokyo, Japan, Takeshi Tsuji, Kyushu University, Department of Earth Resources Engineering, Fukuoka, Japan and Takashi Tonegawa, JAMSTEC, Research Institute for Marine Geodynamics, Yokohama, Japan
 
3D seismic investigation of sedimentation and deformation in the Tuaheni Basin, Hikurangi Margin, New Zealand (489682)
Hannah Tilley1, Gregory F Moore1, Shuoshuo Han2, Nathan L Bangs2, Ryuta Arai3, Philip Barnes4 and NZ3D Team, (1)University of Hawaii at Manoa, Earth Sciences, Honolulu, HI, United States, (2)University of Texas Institute for Geophysics, Austin, TX, United States, (3)JAMSTEC, Yokohama, Japan, (4)National Institute of Water & Atmospheric Research, Wellington, New Zealand
 
Influence of Incoming Plate Relief on Overriding Plate Deformation and Earthquake Nucleation: Cocos Ridge Subduction (Costa Rica) (492269)
Sara Martinez-Loriente, Institut de Ciències del Mar - CSIC, Barcelona, Spain, Valenti Sallares, Institute of Marine Sciences - CSIC, Barcelona, Spain, Cesar Ranero, ICREA at CSIC, Barcelona, Spain, Jonas B Ruh, Geological institute, ETH Zurich, Zurich, Switzerland, Udo Barckhausen, Federal Institute for Geosciences and Natural Resources (BGR), Hannover, Germany, Ingo Grevemeyer, GEOMAR, Kiel, Germany, Nathan L Bangs, Univ Texas, Institute for Geophysics, Austin, TX, United States and Eulàlia Gràcia, CMIMA-CSIC, Barcelona, Spain
 
Mechanisms Generating Fluid Overpressure at the Trench of Subduction Zones and Implications for Megathrust Weakening. (494180)
Maria A Nikolinakou, Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX, United States, Baiyuan Gao, University of Texas at Austin, Austin, TX, United States, Peter B Flemings, The University of Texas at Austin, Institute for Geophysics and Department of Geological Sciences, Jackson School of Geosciences, Austin, TX, United States and Demian M Saffer, Pennsylvania State University, University Park, PA, United States
 
Evidence of subduction zone segmentation: Finite-difference tomography and earthquake relocation along the Java margin (497291)
Anne Meylani Magdalena Sirait1, Anne Meltzer2, Josh Stachnik2, Mohamad Ramdhan3 and Nova Heryandoko4, (1)Lehigh University, Bethlehem, PA, United States, (2)Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States, (3)Agency for Meteorology, Climatology and Geophysics (BMKG), Jakarta, Indonesia, Jakarta, Indonesia, (4)Indonesian Agency for Meteorology, Climatology and Geophysics, Jakarta, Indonesia
 
Characterization of porosity in the sediments entering the Northern Hikurangi Margin from Cation Exchange Capacity and IODP Expeditions 372 and 375 data : implications for compaction state, stress and fluid pressure (498262)
Jade Dutilleul, Sylvain Bourlange and Yves Géraud, University of Lorraine Nancy, GeoRessources, Nancy Cedex, France
 
Hydrogeology of the Cascadia subduction zone as illuminated by seismicity (499921)
Simon M Peacock and Michael G Bostock, University of British Columbia, Vancouver, BC, Canada
 
Subduction of rough seafloor facilitates sediment underplating beneath a low velocity prism (503442)
Andrew Gase1, Nathan L Bangs2, Harm J Van Avendonk1, Thomas Luckie3, Daniel H N Barker4, Dan Bassett4, Katrina Jacobs5, David A Okaya6, Stuart A Henrys4, Shuichi Kodaira7, Gou Fujie8, Yojiro Yamamoto9, Adrien F Arnulf10, Laura M Wallace11 and Demian M Saffer12, (1)University of Texas at Austin, Austin, TX, United States, (2)Univ Texas, Institute for Geophysics, Austin, TX, United States, (3)University of Southern California, Los Angeles, CA, United States, (4)GNS Science, Lower Hutt, New Zealand, (5)GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, (6)Univ Southern California, Los Angeles, CA, United States, (7)Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Geodynamics, Yokohama, Japan, (8)R&D Center for Earthquake and Tsunami, JAMSTEC, Yokohama, Japan, (9)JAMSTEC, Yokohama, Japan, (10)Scripps Institution of Oceanography, La Jolla, CA, United States, (11)University of Texas at Austin, Institute for Geophysics, Austin, United States, (12)Pennsylvania State University, University Park, PA, United States
 
Origin and Diagenetic Priming of a Potential Slow-slip Trigger Zone in Volcaniclastic Deposits Flanking a Seamount on the Subducting Plate, Hikurangi Margin, New Zealand (503922)
Kathleen M Marsaglia1, Alison Marie Franco1, Julia Morgan2, Sydney Allen2 and Michael Underwood3, (1)California State University Northridge, Geological Sciences, Northridge, CA, United States, (2)Rice University, Earth and Planetary Sciences, Houston, TX, United States, (3)New Mexico Tech, Earth and Environmental Sciences, Socorro, NM, United States
 
Up-Scale Cascade of Fluid Pathways in an Exhumed Accretionary Wedge – the Link Between Slow Slip, Tremor and Megathrust Earthquakes (504875)
Ismay Vénice Akker1, Christoph Eckart Schrank2, Michael W.M. Jones3, Cameron M. Kewish4,5, Alfons Berger1 and Marco Herwegh1, (1)University of Bern, Institute of Geological Sciences, Bern, Switzerland, (2)Queensland University of Technology, School of Earth, Environmental and Biological Sciences, Brisbane, Australia, (3)Queensland University of Technology, Central Analytical Research Facility, Institute of Future Environments, Brisbane, Australia, (4)Australian Synchrotron, Australian Nuclear Science and Technology Organisation, Melbourne, Australia, (5)La Trobe University, ARC Centre of Excellence in Advanced Molecular Imaging, La Trobe Institute for Molecular Sciences, Melbourne, Australia
 
Earthquakes track subduction fluids from their source in the slab to their sink in the mantle wedge (505255)
Felix Julian Halpaap1, Stephane Rondenay1, Alexander Perrin2, Saskia D B Goes3, Lars Ottemöller1, Florian Millet4, Håkon Austrheim5, Robert Shaw6 and Thomas Eeken7, (1)University of Bergen, Bergen, Norway, (2)Imperial College London, London, SW7, United Kingdom, (3)Imperial College London, Department of Earth Science and Engineering, London, United Kingdom, (4)LGLTPE Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement, Villeurbanne Cedex, France, (5)University of Oslo, Oslo, Norway, (6)Imperial College London, London, United Kingdom, (7)Madison, WI, United States
 
Seismic evidence for megathrust fault-valve behavior during episodic tremor and slip (505985)
Jeremy Gosselin1, Pascal Audet1, Clément Esteve1, Morgan Elyse McLellan2, Stephen Glenn Mosher2 and Andrew Schaeffer3, (1)University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada, (2)University of Ottawa, Ottawa, ON, Canada, (3)Geological Survey of Canada, Sidney, Canada
 
The decisive role of irregular continental margins on ophiolite creation and peridotite exhumation (506084)
Jeroen Van Hunen1, Nicholas Schliffke2, Frédéric Gueydan3, Valentina Magni2 and Mark Benedict Allen2, (1)University of Durham, Department of Earth Sciences, Durham, United Kingdom, (2)University of Durham, Durham, United Kingdom, (3)University of Montpellier II, Montpellier cedex 5, France
 
Anatomy of the Nankai subduction zone. (509399)
Adrien F Arnulf, Institute for Geophysics, Austin, TX, United States, Dan Bassett, GNS Science, Lower Hutt, New Zealand, Alistair J Harding, Scripps Institution of Oceanog, La Jolla, CA, United States, Shuichi Kodaira, Yokohama National University, Yokohama, Japan and Ayako Nakanishi, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
 
Geochemical evidence for source materials of frictional melt: an example from thepseudotachylyte in the Jurassic accretionary complex, central Japan (511144)
Chizuru Ozawa1, Tsuyoshi Ishikawa2 and Kohtaro Ujiie1, (1)University of Tsukuba, Tsukuba, Japan, (2)JAMSTEC, Nankoku, Kochi, Japan
 
Relationship between the Complex Moho Geometries and Deep Low-Frequency Earthquake Activity beneath Eastern Shikoku, Southwest Japan (511715)
Katsuhiko Shiomi, Tetsuya Takeda and Tomotake Ueno, National Research Institute for Earth Science and Disaster Resilience (NIED), Tsukuba, Japan
 
Kinetic, Mechanical, and Fluid Flow Models for the Behavior of the Subduction Interface (511884)
Donald M Fisher, John N Hooker, Andrew Smye and Chris Marone, Pennsylvania State University, Department of Geosciences, University Park, PA, United States
 
Temperature Variations in Tectonic Mélanges: Constraints from Oxygen Isotope Thermometry (512830)
Tsai-Wei Chen1, Donald M Fisher1, Andrew Smye1 and Yoshitaka Hashimoto2, (1)Pennsylvania State University, Department of Geosciences, University Park, PA, United States, (2)University of Kochi, Kochi, Japan
 
Slow slip along subduction megathrust controlled by metasomatism-enhanced viscous shear (512853)
Kohtaro Ujiie1, Kazuya Noro1, Norio Shigematsu2, Ake Fagereng3, Naoki Nishiyama1, Haruna Masuyama1, Christopher Tulley4, Yasushi Mori5 and Hiroyuki Kagi6, (1)University of Tsukuba, Tsukuba, Japan, (2)Geological Survey of Japan, Tsukuba Ibaraki, Japan, (3)Cardiff University, Earth and Ocean Sciences, Cardiff, CF24, United Kingdom, (4)Cardiff University, Cardiff, United Kingdom, (5)Kitakyushu Museum Natl & Human, Kitakyushu, Japan, (6)Univ Tokyo, Tokyo, Japan
 
Microseismic Evidence for Episodic Fluid Release from Subducting Oceanic Crust Associated with Slow Slip in the Northern Hikurangi (513017)
Emily Warren-Smith1, Bill Fry1, Laura M Wallace2, Stephen C Bannister1, Katherine Woods3 and Kimihiro Mochizuki4, (1)GNS Science, Lower Hutt, New Zealand, (2)University of Texas at Austin, Institute for Geophysics, Austin, United States, (3)Victoria University of Wellington, Wellingon, New Zealand, (4)University of Tokyo, Earthquake Research Institute, Bunkyo-ku, Japan
 
Change in stress magnitude with seismic cycles within a coherent unit in the Shimanto Belt, SW Japan (513767)
Hashiguchi Makoto, Kochi University, Kochi, Japan and Yoshitaka Hashimoto, University of Kochi, Kochi, Japan
 
Three-dimensional anisotropic P-wave velocity structure around the shallow plate boundary in the Northern Hikurangi margin, New Zealand (513775)
Ryuta Arai1, Shuichi Kodaira1, Stuart A Henrys2, Nathan L Bangs3, Koichiro Obana1, Gou Fujie1, Seiichi Miura1, Daniel H N Barker2, Dan Bassett2, Rebecca E Bell4, Joanna V Morgan5, Mike Warner5, Kimihiro Mochizuki6, Richard L Kellett2, Valerie Stucker2, Bill Fry2 and NZ3D Team, (1)JAMSTEC, Yokohama, Japan, (2)GNS Science, Lower Hutt, New Zealand, (3)Univ Texas, Institute for Geophysics, Austin, TX, United States, (4)Imperial College London, Department of Earth Science and Engineering, London, SW7, United Kingdom, (5)Imperial College London, London, United Kingdom, (6)Earthquake Research Institute, The University of Tokyo, Tokyo, Japan
 
Transient switching between creep and fracture at and below the base of the megathrust seismogenic zone. (514922)
Christopher J Tulley1, Ake Fagereng1, Kohtaro Ujiie2 and Chris Harris3, (1)Cardiff University, Earth and Ocean Sciences, Cardiff, CF24, United Kingdom, (2)University of Tsukuba, Tsukuba, Japan, (3)University of Cape Town, Department of Geological Sciences, Rondebosch, South Africa
 
Heterogeneous plate interface deformation in an exhumed sediment-starved subgreenschist mélange (515328)
Harold Robert Leah, Cardiff University, Cardiff, CF24, United Kingdom, Ake Fagereng, University of Cape Town, Department of Geological Sciences, Cape Town, South Africa, Niall Groome, Cardiff University, Cardiff, United Kingdom, Agathe Eijsink, MARUM - University of Bremen, Bremen, Germany and David Buchs, Cardiff University, School of Earth and Ocean Sciences, Cardiff, United Kingdom
 
Characteristics on Fault coupling in the Western Solomon Islands based on GPS observations and PS-DInSAR (518585)
Yu-Ting Kuo1, Chin-Shang Ku1,2, Chih-Heng Lu3, Hsin Tung1, Yue-Gau Chen2,4, Yu Wang2, Yu-Nung Nina Lin1, Ray Y Chuang3, Ya-Ju Hsu1, Bor-Shouh Huang1, Frederick W Taylor5 and Douglas Billy6, (1)Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan, (2)Department of Geosciences, National Taiwan University, Taipei, Taiwan, (3)Department of Geography, National Taiwan University, Taipei, Taiwan, (4)Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan, (5)Institute for Geophysics, Austin, TX, United States, (6)Geological Survey Division, Ministry of Mines, Energy & Rural Elect, Honiara, Solomon Islands
 
Role of hydrous minerals in the structure and rheology of the subduction plate interface (Invited) (521537)
Caroline Seyler and James D Kirkpatrick, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada
 
Lateral variation of seismic rupture along the out-of-sequence thrust in Boso Peninsula, central Japan: Preliminary report of the fault-zone drilling (522648)
Yuzuru Yamamoto, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Shun Chiyonobu, Akita University, Akita, Japan and Yohei Hamada, JAMSTEC, Kochi Institute for Core Sample Research, Nankoku, Japan
 
A new view of interseismic coupling at the Hikurangi subduction zone, New Zealand, and relationship to geophysical inferences of fluids (526794)
Laura M Wallace1,2, Charles A Williams Jr1, Ian J Hamling1 and A. John Haines3, (1)GNS Science, Lower Hutt, New Zealand, (2)University of Texas Institute for Geophysics, Austin, United States, (3)GNS Science, Dunedin, New Zealand
 
3D seismic tomography in the rupture area of the 2016 Mw 7.8 Pedernales, Ecuador, earthquake: Imaging seismic properties along the subduction zone interface (534239)
Sergio Leon-Rios1, Hans Agurto-Detzel2, Andreas Rietbrock1, Alexandra Patricia Alvarado3, Susan L Beck4, Philippe Charvis5, Benjamin Edwards6, Yvonne Font5, Tom Garth7, Audrey Galve5, Mariah Chambers Hoskins8, Colton Lynner4, Anne Metlzer9, Jean Mathieu Nocquet10,11, Marc M Regnier12, Frederique Rolandone13, Mario Calixto Ruiz14 and Lillian Soto-Cordero8, (1)Karlsruhe Institute of Technology, Karlsruhe, Germany, (2)Université Côte d’Azur, CNRS, OCA, IRD, Géoazur, Valbonne, France, (3)Instituto Geofísico de la Escuela Politécnica Nacional, Quito, Ecuador, (4)University of Arizona, Tucson, AZ, United States, (5)Géoazur - Université Nice Sophia Antipolis, Université Côte d'Azur, IRD, CNRS, OCA, Valbonne, France, (6)University of Liverpool, Institute for Risk and Uncertainty, Liverpool, United Kingdom, (7)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, (8)Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States, (9)Lehigh University, Bethlehem, United States, (10)Université Côte d'Azur, IRD, CNRS, Géoazur, Valbonne, France, (11)Institut de Physique du Globe de Paris, Paris, France, (12)Géoazur - Université Côte d'Azur - IRD - CNRS - Observatoire de la côte d'Azur, Valbonne, France, (13)Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, Paris, France, (14)Escuela Politécnica Nacional, Instituto Geofísico, Quito, Ecuador
 
Experimental Constrains on Mechanical Behaviors in the Nankai Inner Accretionary Prism (537333)
Szu-Ting Kuo, Texas A&M University College Station, College Station, TX, United States, Manami Kitamura, AIST - National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan and Hiroko Kitajima, Texas A&M University, Center for Tectonophysics and the Department of Geology & Geophysics, College Station, TX, United States
 
Dynamic weakening and seismic slip propagation along the Hikurangi margin shallow subduction fault under realistic pore fluid pressures (537349)
Elena Spagnuolo, INGV (Istituto Nazionale di Geofisica e Vulcanologia), ROMA, Italy, Stefano Aretusini, INGV (Istituto Nazionale di Geofisica e Vulcanologia), Roma, Italy, Francesca Meneghini, University of Pisa, Pisa, Italy, Christopher Harbord, National Institute of Geophysics and Volcanology, Rome, Italy and Giulio Di Toro, University of Padova, Department of Geosciences, Padova, Italy; INGV (Istituto Nazionale di Geofisica e Vulcanologia), Roma 1, Rome, Italy
 
Postseismic Deformation and Stress Perturbation in NE China due to the 2011 Tohoku Earthquake (537439)
Yan Hu, University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China, Min Wang, Institute of Geology, China Earthquake Administration, Beijing, China, Bin Zhao, CEA, Wuhan, China, Mingruo Jiao, Liaoning Earthquake Administration, Shenyang, Liaoning Province, China and Kelin Wang, Geological Survey of Canada, Pacific Geoscience Centre, Sidney, BC, Canada
 
Marine forearc structure of the 2014 Mw 8.1 Iquique earthquake in Northern Chile revealed by relocated hypocenter locations from offshore observations (537862)
Florian Petersen1, Dietrich Lange1, Ingo Grevemeyer1, Heidrun Kopp1,2, Anne M Trehu3, Eduardo Contreras-Reyes4 and Sergio E Barrientos5,6, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)University of Kiel, Kiel, Germany, (3)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (4)University of Chile FCFM, Department of Geophysics, Santiago, Chile, (5)Univ de Chile, Santiago, Chile, (6)University of Chile, National Seismological Center, Santiago, Chile
 
Generation of Sediment Under-Consolidation and low Seismic Vp in Subduction Forearcs – the Role of Megathrust Geometry in Modulating Tectonic Loading (538140)
Tianhaozhe Sun1, Demian M Saffer1 and Susan M Ellis2, (1)Pennsylvania State University, University Park, PA, United States, (2)GNS Science, Lower Hutt, New Zealand
 
Stress state at the toe of the Nankai accretionary margin, with implications for characterization of the decollement (539058)
Marianne Conin1, Yohei Hamada2, Gilles Guerin3, Gregory F Moore4, Makoto Otsubo5, Kohtaro Ujiie6, Armin Dielforder7, Christine Regalla8, Barbara E John9, Dan Faulkner10, Asuka Yamaguchi11, Matt Ikari12, Gaku Kimura13, Hiroko Kitajima14, Demian M Saffer15, Tobin Harold16, Masataka Kinoshita17, Sean Toczko18, Lena Maeda18, Nobu Eguchi18 and IODP Expedition 358 Shipboard Scientific Party, (1)Laboratoire GeoRessources (UMR 7359, Université de Lorraine, CNRS, CREGU), Nancy, France, (2)JAMSTEC, Kochi Institute for Core Sample Research, Nankoku, Japan, (3)Columbia University, Palisades, NY, United States, (4)University of Hawaii at Manoa, Earth Sciences, Honolulu, HI, United States, (5)Geological Survey of Japan, Tsukuba, Japan, (6)University of Tsukuba, Tsukuba, Japan, (7)University of Bern, Bern, Switzerland, (8)McGill University, Montreal, QC, Canada, (9)University of Wyoming, Laramie, WY, United States, (10)University of Liverpool, Liverpool, L69, United Kingdom, (11)University of Tokyo, Kashiwa, Japan, (12)MARUM, University of Bremen, Bremen, Germany, (13)The University of Tokyo, Tokyo, Japan, (14)Texas A&M University, Center for Tectonophysics and the Department of Geology & Geophysics, College Station, TX, United States, (15)Pennsylvania State University, University Park, PA, United States, (16)University of Wisconsin Madison, Madison, United States, (17)Japan Agy Marine Sci Tech, Nankoku Kochi, Japan, (18)JAMSTEC, Yokohama, Japan
 
Seismogenic Zone Characteristics Along the Nicaragua/Costa Rica Subduction Zone (541506)
Melissa M Moore-Driskell, University of North Alabama, Florence, AL, United States, Heather DeShon, Southern Methodist University, Dallas, TX, United States and Robert N Harris, Oregon State University, Corvallis, OR, United States
 
Non-standard applications of seismic data from the Ocean Networks Canada NEPTUNE offshore cabled observatory array (542040)
Joseph James Farrugia1, Earl Davis2, Martin Heesemann3 and Honn Kao2, (1)Ocean Networks Canada, Victoria, BC, Canada, (2)Geological Survey of Canada, Pacific Geoscience Centre, Sidney, BC, Canada, (3)Ocean Networks Canada, University of Victoria, Victoria, BC, Canada
 
Earthquake Distribution and Plate Bending at The Southernmost Mariana Subduction Zone (542116)
Han Chen, The Chinese University of Hong Kong, Earth System Science Programme, Faculty of Science, Hong Kong, China, Hongfeng Yang, Earth System Science Programme, Faculty of Science, Chinese University of Hong Kong, Hong Kong, Hong Kong, Jian Lin, Woods Hole Oceanographic Inst, G & G, Woods Hole, MA, United States; Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, Gaohua Zhu, Chinese University of Hong Kong, Earth System Science Programme, Hong Kong 999077, China and Jiangyang Zhang, Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
 
Consolidation behavior, permeability, and compressional wavespeeds of sediment entering the eastern Aleutian subduction zone: Implications for the evolution of subducted sediments (543176)
Peter Miller, Pennsylvania State University Main Campus, University Park, PA, United States, Parisa Shokouhi, Pennsylvania State University, Engineering Science and Mechanics, University Park, PA, United States and Demian M Saffer, Pennsylvania State University, University Park, PA, United States
 
Earthquake evidence for fore-arc extension at the southernmost Mariana subduction zone (543282)
Gaohua Zhu, Chinese University of Hong Kong, Earth System Science Programme, Hong Kong 999077, China, Hongfeng Yang, Chinese University of Hong Kong, Earth Science System Programme, Hong Kong, Hong Kong, Jian Lin, Woods Hole Oceanographic Inst, G & G, Woods Hole, MA, United States; Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China and Qingyu You, Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China
 
Variations in Structure on the Southern Hikurangi Subduction Zone (544749)
Duncan Stevens1, Lisa Clare McNeill2, Timothy Henstock1, Rebecca E Bell3, Nathan L Bangs4, Harm J Van Avendonk5, Gareth James Crutchley6, Stuart A Henrys7, Daniel H N Barker7 and Dan Bassett7, (1)University of Southampton, Ocean and Earth Science, Southampton, United Kingdom, (2)University of Southampton, Ocean and Earth Science, Southampton, SO14, United Kingdom, (3)Imperial College London, Department of Earth Science and Engineering, London, SW7, United Kingdom, (4)Univ Texas, Institute for Geophysics, Austin, TX, United States, (5)University of Texas at Austin, Austin, TX, United States, (6)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (7)GNS Science, Lower Hutt, New Zealand
 
Probing the nature of the Hikurangi Margin hydrogeologic system – Preliminary results from the SAFFRONZ Expedition (544785)
Irita Evelyn Aylward1, Evan A Solomon2, Marta E Torres3, Theresa L Whorley4, Robert N Harris5, Brendan Thomas Philip6, Jess Hillman7, April Abbott8, Min Luo9, Romina Centurion10, Claire Cecelia McKinley11, Sarah Seabrook12, Jasper Hoffmann13, Declan Andrew14 and Julia Favorito5, (1)University of Washington Seattle, Seattle, WA, United States, (2)Univ Washington, Seattle, WA, United States, (3)Oregon State Univ, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (4)University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States, (5)Oregon State University, Corvallis, OR, United States, (6)University of Washington, Seattle, WA, United States, (7)GNS Science, Lower Hutt, New Zealand, (8)Macquarie University, Earth and Planetary Sciences, Sydney, Australia, (9)Shanghai Ocean University, Lingang, China, (10)University of Washington, School of Oceanography, Seattle, WA, United States, (11)Boston University, Portland, OR, United States, (12)Oregon State University, CEOAS, Corvallis, OR, United States, (13)University of Otago, Geology, Dunedin, New Zealand, (14)University of Auckland, Auckland, New Zealand
 
The Effect of Consolidation State on Pore Pressure Development in the Nankai Accretionary Prism off Muroto Peninsula, SW Japan (545749)
Junli Zhang, Andre Huepers, Stefan Kreiter, Walter Menapace and Achim Kopf, University of Bremen, MARUM – Center for Marine Environmental Sciences, Bremen, Germany
 
Postseismic afterslip and mantle flow at Nankai subduction zone (547189)
Elizabeth M Sherrill1, Kaj M Johnson1 and Douglas W Tebo2, (1)Indiana University, Bloomington, IN, United States, (2)Indiana Department of Environmental Management, Office of Land Quality, Indianapolis, IN, United States
 
Analysis of the Mw 6.7 Coquimbo-La Serena Earthquake of June 14th, 2019: Preliminary Results Determined with a High Density Local Seismic Network (554386)
Diana Comte1,2, Marcelo Farías3, Andrea Paz Navarro-Aránguiz1,2, Steven W Roecker4 and Andreas Rietbrock5, (1)Depto. de Geofísica, FCFM Universidad de Chile, Santiago, Chile, (2)AMTC-FCFM Universidad de Chile, Santiago, Chile, (3)Universidad de Chile, Departamento de Geología, Santiago, Chile, (4)Rensselaer Polytechnic Inst, Earth & Environmental Sciences, Troy, NY, United States, (5)Karlsruhe Institute of Technology, Karlsruhe, Germany
 
The Complex Interplay Between Slab Hydration and Fluid Pathways that Controls Segmentation of Seismicity and Volcanism in the Central Andes (554913)
Jaime Araya Vargas1,2, Naser M Meqbel3, Oliver Ritter3,4, Heinrich Brasse4, Ute Weckmann3,5, Gonzalo A Yanez6,7 and Benigno Godoy2, (1)Pontifical Catholic University of Chile, Department of Structural and Geotechnical Engineering, Santiago, Chile, (2)Centro de Excelencia en Geotermia de los Andes (CEGA), Santiago, Chile, (3)GFZ German Research Centre for Geosciences, Potsdam, Germany, (4)Free University of Berlin, Institute of Geological Sciences, Geophysics Section, Berlin, Germany, (5)University of Potsdam, Institute of Geosciences, Potsdam, Germany, (6)Pontifical Catholic University of Chile, Deparment of Structural and Geotechnical Engineering, Santiago, Chile, (7)National Research Center for Integrated Natural Disasters Management (CIGIDEN), Santiago, Chile
 
Seismic structures of the crust and upper mantle in New Zealand from full-wave ambient noise tomography (555306)
Sampath Rathnayaka, University of Massachusetts Amherst, Amherst, MA, United States and Haiying Gao, University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States
 
Investigation of Phase-Converted Seismic Waves at the Hikurangi Plate Interface, New Zealand (556098)
Mel Zhang, University of Colorado Boulder, Boulder, CO, United States, Anne F Sheehan, University of Colorado at Boulder, Boulder, CO, United States and Jefferson Yarce, University of Colorado at Boulder, Boulder, United States
 
Active source seismic study of upper oceanic crust in the Alaskan and Sumatran trench outer rise systems (558987)
Tanner Michael Acquisto1, Anne Becel2, Satish Chandra Singh3, Donna J Shillington2 and Kerry Key4, (1)Columbia University, Lamont-Doherty Earth Observatory, New York, NY, United States, (2)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (3)IPG Paris, Paris Cedex 05, France, (4)Lamont-Doherty Earth Observatory, Palisades, NY, United States
 
Role of Mechanical Properties of Sediments in the Formation of Landward Versus Seaward Verging Thrust Faults at Accretionary Prisms (560049)
Madeline Hunt, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States, Garrett Ito, Univ Hawaii, Earth Sciences, Honolulu, HI, United States and Marc-Andre Gutscher, CNRS, Paris Cedex 16, France
 
Earthquake reflection imaging of subduction structure beneath the eastern part of the Kii Peninsula, southwestern Japan (565916)
Eiji Kurashimo1, Takashi Iidaka1, Noriko Tsumura2 and Takaya Iwasaki1, (1)University of Tokyo, Bunkyo-ku, Japan, (2)Chiba Univ, Chiba, Japan
 
Intermediate-depth Earthquakes in the Mantle of Subducting Slabs Could Occur Under Hydrated Condition (568167)
Xiang Gao1,2, Kelin Wang3, Ikuko Wada4 and Jiangheng He3, (1)Institute of Oceanology, Chinese Academy of Sciences, Key Laboratory of Marine Geology and Environment, Qingdao, China, (2)Pilot National Laboratory for Marine Science and Technology (Qingdao), Laboratory for Marine Geology, Qingdao, China, (3)Geological Survey of Canada, Pacific Geoscience Centre, Sidney, BC, Canada, (4)University of Minnesota Twin Cities, Department of Earth Sciences, Minneapolis, MN, United States
 
Controlling factors on the shallow co-seismic slip at the Sumatra subduction zone megathrust (574440)
Paola Vannucchi, Royal Holloway University of London, Egham, TW20, United Kingdom, Elena Spagnuolo, National Institute of Geophysics and Volcanology, Rome, Italy, Stefano Aretusini, INGV (Istituto Nazionale di Geofisica e Vulcanologia), Roma, Italy, Giulio Di Toro, University of Padova, Padova, Italy and Stefan Bjorklund Nielsen, University of Durham, Department of Earth Sciences, Durham, United Kingdom
 
Characteristics of the seismic images and its relation to the shallow very low frequency events in the central Nankai trough (574664)
Yasuyuki Nakamura1, Shuichi Kodaira2, Tetsuo No3, Yuka Kaiho4, Gou Fujie5, Kazuya Shiraishi1 and Seiichi Miura4, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Geodynamics, Yokohama, Japan, (3)Japan Agency for Marine-Earth, Yokohama, Japan, (4)JAMSTEC, Yokohama, Japan, (5)R&D Center for Earthquake and Tsunami, JAMSTEC, Yokohama, Japan
 
High Resolution Seismic Velocity Mapping of the Plate Boundary Structures in the Slow Earthquake Gap Zone off Western Kii Peninsula, Nankai Trough (576411)
Yanfang Qin1, Gou Fujie2, Shuichi Kodaira3, Yasuyuki Nakamura4, Yuka Kaiho5, Tetsuo No6 and Seiichi Miura5, (1)Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan, (2)R&D Center for Earthquake and Tsunami, JAMSTEC, Yokohama, Japan, (3)Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Geodynamics, Yokohama, Japan, (4)Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (5)JAMSTEC, Yokohama, Japan, (6)Japan Agency for Marine-Earth, Yokohama, Japan
 
Thermal and Structural Constraints on Megathrust Seismogenic Potential of the Northern Manila Trench Subduction Zone (578335)
Huiwen Tan1, Xiang Gao1, Kelin Wang2 and Jiangheng He2, (1)Institute of Oceanology, Chinese Academy of Sciences, Key Laboratory of Marine Geology and Environment, Qingdao, China, (2)Geological Survey of Canada, Pacific Geoscience Centre, Sidney, BC, Canada
 
Impact of oceanic plate structure on slab hydration and lower-plane seismicity (579523)
Jacob Geersen, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Christian Sippl, Academy of Sciences of the Czech Republic, Prague, Czech Republic
 
Stick-slip frictional behavior of the sedimentary input to the North Sumatran subduction zone (579751)
Katja Stanislowski, Andre Huepers and Matt Ikari, MARUM - University of Bremen, Bremen, Germany
 
Detection of Cascadia Slow Slip in Borehole Pore Pressure Data (580690)
Joshua Edgington, Texas A&M University, Center for Tectonophysics, College Station, TX, United States and Patrick M Fulton, Cornell University, Ithaca, NY, United States
 
Afterslip in the ETS Zone at Nankai Trough, SW Japan (581206)
Kaj M Johnson, Indiana University Bloomington, Earth and Atmospheric Sciences, Bloomington, IN, United States and Elizabeth M Sherrill, Indiana University, Bloomington, IN, United States
 
Role of Metasomatic Reactions of Metabasite on Plate-boundary Shear Localization at Slab-mantle Interface (582841)
Naoki Nishiyama1, Kohtaro Ujiie1, Kazuya Noro1, Yasushi Mori2 and Haruna Masuyama1, (1)University of Tsukuba, Tsukuba, Japan, (2)Kitakyushu Museum Natl & Human, Kitakyushu, Japan
 
Heat flow observations seaward of the Cascadia deformation front offshore Grays Harbor, WA, reveal ongoing hydrothermal circulation in subducting crust and its impact on the thermal regime of the megathrust (592594)
Robert N Harris, Oregon State University, Corvallis, OR, United States, Glenn A Spinelli, New Mexico Tech, Socorro, NM, United States, Michael Hutnak, Right on Q, Santa Cruz, CA, United States and Harlan Paul Johnson, Univ Washington, Seattle, WA, United States
 
Crust/mantle structure, hydration, and dynamic deformation at the southernmost Mariana Trench (593141)
Jian Lin1, Kuiyuan Wan2, Gaohua Zhu3, Min Xu4, Hongfeng Yang5, Fan Zhang6 and Zhiyuan Zhou6, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)University of Chinese Academy of Sciences, Beijing, China, (3)Chinese University of Hong Kong, Earth System Science Programme, Hong Kong 999077, China, (4)CAS Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Guangzhou, China, (5)Chinese University of Hong Kong, Hong Kong, Hong Kong, (6)South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
 
Pythia’s Oasis: Fluid sources and overpressures within the central Cascadia subduction zone revealed by a warm, fluid-dominated, high-flux seafloor seep (596397)
Brendan Thomas Philip1, Evan A Solomon2, Deborah S Kelley3, Theresa L Whorley3, Emily C Roland4, Marta E Torres5, Robert N Harris6, Anne M Trehu7 and Robert W Collier7, (1)University of Washington, Seattle, WA, United States, (2)Univ Washington, Seattle, WA, United States, (3)University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States, (4)University of Washington, School of Oceanography, Seattle, WA, United States, (5)Oregon State Univ, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (6)Oregon State University, Corvallis, OR, United States, (7)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
 
Ultra-Low Temperature (ULT) viscous deformation during subduction, recorded at the leading edge of the mantle wedge, Samail ophiolite (598692)
Peter B Kelemen, Columbia University of New York, Palisades, NY, United States, Greg Hirth, Brown Univeristy, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States, Wenlu Zhu, University of Maryland College Park, College Park, MD, United States, Craig E Manning, Univ California Los Angeles, Los Angeles, CA, United States, Janos L Urai, RWTH Aachen University, Aachen, Germany and Oman Drilling Project Science Team
 
The coupled effects of rehydration and rheology on fluid migration in subduction zones (599125)
Cian R Wilson1, Peter E van Keken1 and Marc W Spiegelman2, (1)Carnegie Institution for Science, Department of Terrestrial Magnetism, Washington, DC, United States, (2)Columbia University, New York, NY, United States
 
Physical properties of the Nankai Trough at Sites C0002, C0024 and C0025, IODP Expedition 358 (604317)
Zirou Jin1, John D Bedford2, Manami Kitamura3, Hiroki Sone1, Katja Stanislowski4, Yohei Hamada5, Achim Kopf4, Junli Zhang6, Hiroko Kitajima7, Demian M Saffer8, Takehiro Hirose5, Matt Ikari9, Kyuichi Kanagawa10, Gaku Kimura11, Masataka Kinoshita12, Harold J Tobin13, Asuka Yamaguchi14, Nobu Eguchi15, Yusuke Kubo15, Lena Maeda15, Sean Toczko15 and IODP Expedition 358 Shipboard Scientific Party, (1)University of Wisconsin-Madison, Geological Engineering Program, Madison, WI, United States, (2)University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom, (3)Hiroshima University, Higashi-Hiroshima, Japan, (4)MARUM - University of Bremen, Bremen, Germany, (5)JAMSTEC, Kochi Institute for Core Sample Research, Nankoku, Japan, (6)University of Bremen, MARUM – Center for Marine Environmental Sciences, Bremen, Germany, (7)Texas A&M University, Center for Tectonophysics and the Department of Geology & Geophysics, College Station, TX, United States, (8)Pennsylvania State University, University Park, PA, United States, (9)MARUM, University of Bremen, Bremen, Germany, (10)Chiba University, Earth Sciences, Chiba, Japan, (11)The University of Tokyo, Tokyo, Japan, (12)Japan Agy Marine Sci Tech, Nankoku Kochi, Japan, (13)University of Washington Seattle Campus, Department of Earth and Space Sciences, Seattle, WA, United States, (14)University of Tokyo, Kashiwa, Japan, (15)JAMSTEC, Yokohama, Japan
 
Effects of Evolving Fluid Pressure and Consolidation State on Shallow Megathrust Deformation (609313)
Ben Belzer and Melodie E French, Rice University, Houston, TX, United States
 
Interplay Between Megathrust Topography and Tsunamigenic Structures Offshore West Mexico (611212)
Rafael Bartolome1, Manel Prada1, Claudia Gras1, Slaven Begovic1, Fadi Awkar2, William Lee Bandy3 and Juanjo Danobeitia4, (1)ICM-CSIC, Barcelona-CSI, Geosciences, Barcelona, Spain, (2)ICM-CSIC, Geosciences, Barcelona, Spain, (3)Universidad Nacional Autonoma de Mexico, Instituto de Geofisica, Mexico City, Mexico, (4)EMSO ERIC, CMO, Rome, Italy
 
The Role of Fluids at the Boundaries of the Subduction Thrust Seismogenic Zone: What do the Rocks Tell Us? (613531)
Ake Fagereng1, Susan M Ellis2, Johann F.A. Diener3, Francesca Remitti4, Harold Robert Leah1, Christopher Tulley5, Adam Beall6, Stephen James5 and Kohtaro Ujiie7, (1)Cardiff University, Cardiff, CF24, United Kingdom, (2)GNS Science, Lower Hutt, New Zealand, (3)University of Cape Town, Department of Geological Sciences, Cape Town, South Africa, (4)Univ. di Modena e Reggio E., Modena, Italy, (5)Cardiff University, Cardiff, United Kingdom, (6)Cardiff University, School of Earth and Ocean Sciences, Cardiff, CF24, United Kingdom, (7)University of Tsukuba, Tsukuba, Japan
 
The strength and consolidation state of sediments from Hikurangi expedition 375 and implications for plate boundary mechanics (613635)
Melodie E French, Rice University, Houston, TX, United States and Julia Morgan, Rice University, Earth and Planetary Sciences, Houston, TX, United States
 
Investigating the role of fluids at three subduction zones along the Ring of Fire with electromagnetic data (Invited) (616867)
Samer Naif1, Kerry Key2, Christine J Chesley1, Steven Constable3 and Robert L Evans4, (1)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (2)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (3)Univ California San Diego, La Jolla, CA, United States, (4)Woods Hole Oceanographic Institution, Woods Hole, MA, United States
 
Along-strike variations in sediment input at the Alaska Peninsula subduction zone from new open access multichannel seismic reflection data of the Alaska Amphibious Community Seismic Experiment (618021)
Anne Becel1, Anne F Sheehan2, Emma K Myers3, Geoffrey A Abers1, David S. Foster4, Lindsay Lowe Worthington5, Aubreya Nicole Adams6, Peter J Haeussler7, Emily C Roland8, Susan Y Schwartz9, Donna J Shillington1, Douglas Wiens10, Spahr C Webb11 and the science party of the AACSE seismic source survey , (1)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (2)University of Colorado at Boulder, Boulder, CO, United States, (3)University of Washington, Earth and Space Sciences, Seattle, WA, United States, (4)US Geological Survey, Woods Hole, MA, United States, (5)University of New Mexico, Albuquerque, NM, United States, (6)Colgate University, Department of Geology, Hamilton, NY, United States, (7)USGS, Anchorage, AK, United States, (8)University of Washington, School of Oceanography, Seattle, WA, United States, (9)University of California-Santa Cruz, Santa Cruz, CA, United States, (10)Washington University in St Louis, St. Louis, MO, United States, (11)Lamont Doherty Earth Observatory, Palisades, NY, United States
 
Hydrological features across the Japan Trench, derived from pressure while drilling of expedition IODP 343 (J-FAST) (618142)
Hamed Amiri and Mai Linh Doan, ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France
 
Plastic deformation, slip segmentation, geodynamic constraints and seafloor uplift in dynamic earthquake rupture models of the Great 2004 Sumatra-Andaman earthquake (619101)
Alice-Agnes Gabriel1, Thomas Ulrich1, Iris van Zelst2, Elizabeth H Madden3 and Ylona van Dinther4, (1)Ludwig Maximilians University of Munich, Munich, Germany, (2)ETH Swiss Federal Institute of Technology Zurich, Department of Earth Sciences, Zurich, Switzerland, (3)Universidade de Brasília, Observatório Sismológico - Instituto de Geociências, Brasília, Brazil, (4)Utrecht University, Earth Sciences, Utrecht, Netherlands
 
Spatial variations in incoming oceanic plate and its implications for subduction zone processes along the Japan Trench (628231)
Gou Fujie, Shuichi Kodaira, Yasuyuki Nakamura, Koichiro Obana and Seiichi Miura, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
 
Global Applicability of Ultramafic Serpentinization and Carbonation Magnetic Mapping (633752)
Paiden Nicole Pruett1, Masako Tominaga2, Andreas Beinlich3, John A. Greene4, Eduardo A. Lima5, Benjamin P Weiss6, Noah Francis Ryoichi Vento7, Estefania Ortiz7 and Patrick N Fulton8, (1)Texas A&M University College Station, College Station, TX, United States, (2)Texas A&M University College Station, Geology and Geophysics, College Station, TX, United States, (3)Curtin University, Perth, WA, Australia, (4)Texas A&M University College Station, Geology and Geophysics, College Station, United States, (5)MIT-Earth & Planetary Sciences, Cambridge, MA, United States, (6)MIT, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, (7)Texas A&M University College Station, Department of Geology and Geophysics, College Station, TX, United States, (8)Texas A&M University, Department of Geology and Geophysics, College Station, TX, United States
See more of: Tectonophysics
<< Previous Session Proposal | Next Session Proposal >>