T24C:
Subduction across Scales VII


Session ID#: 10738

Session Description:
Both risk assessment and lithosphere dynamics call for a better understanding of subduction zones, particularly along and across the  subduction interface.

How can we bridge the gap between observations made at rock and plate scale, or between signals lasting from seconds to million years? Are we able to image and understand physical conditions and processes at work along the subduction interface at relevant scales, such as years and meters?

Time has come to further our understanding of the nature and structure of the subduction interface and elucidate which lithologies are incorporated and how, which rheological behaviours prevail, which fluids are there and where, or what is their exact bearing on earthquake ruptures.

Building on the recent wealth of geophysical and petrological data and models gathered on the plate-slab interface, we welcome stimulating contributions from all disciplines, seeking to foster joint collaboration and bridge the gap between the various communities.

Primary Convener:  Philippe Agard, Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP, Paris, France
Conveners:  Kelin Wang, Geological Survey of Canada, Pacific Geoscience Centre, Sidney, BC, Canada, Luce Fleitout, Ecole Normale Supérieure Paris, Paris, France and Bradley R Hacker, University of California Santa Barbara, Department of Earth Science, Santa Barbara, CA, United States
Chairs:  Stephan V. Sobolev, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Jesse A Hutchinson, University of Victoria, Ocean Networks Canada, Victoria, BC, Canada
OSPA Liaison:  Younghee Kim, Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea, Republic of (South)

Cross-Listed:
  • G - Geodesy
  • MR - Mineral and Rock Physics
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1242 Seismic cycle related deformations [GEODESY AND GRAVITY]
3613 Subduction zone processes [MINERALOGY AND PETROLOGY]
7240 Subduction zones [SEISMOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Cross-Scale Modelling of Subduction from Minute to Million of Years Time Scale (Invited) (60407)
Stephan V. Sobolev, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Iskander A. Muldashev, GFZ German Research Centre for Geosciences, Section 2.5 Geodynamic Modelling, Potsdam, Germany
Temperature- and stress-dependent rheologic structure beneath Japan inferred from postseismic displacements following the 2011 Tohoku-oki earthquake (79008)
Andrew Mark Freed1, Akinori Hashima2, Thorsten W Becker3, David A Okaya4, Hiroshi Sato2 and Yuki Hatanaka5, (1)Purdue University, West Lafayette, IN, United States, (2)University of Tokyo, Bunkyo-ku, Japan, (3)University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States, (4)University of Southern California, Los Angeles, CA, United States, (5)Geospatial Information Authority of Japan, Tsukuba, Japan
Afterslip and Viscoelastic Relaxation Model Inferred from the Large Scale Postseismic Deformation Following the 2010 Mw 8,8 Maule Earthquake (Chile) (68873)
Emilie Klein1, Luce Fleitout2, Christophe Vigny1 and Jean-Didier Garaud3, (1)Ecole Normale Supérieure, PSL Research University, CNRS UMR 8538, Laboratoire de Géologie, Paris, France, (2)Ecole Normale Supérieure Paris, Paris, France, (3)ONERA Châtillon, Châtillon Cedex, France
Three-dimensional Thermal Model of the Mexican Subduction Zone (66429)
Juan Carlos Rosas1, Felipe da Cruz Pimentel1, Claire A Currie2, Jiangheng He3 and Robert N Harris4, (1)University of Alberta, Edmonton, AB, Canada, (2)University of Alberta, Department of Physics, Edmonton, AB, Canada, (3)Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada, (4)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
Effects of Two Subducting Slabs on the Temperature Distribution Along the Subduction Faults in the Kanto Region, Japan (59458)
Ikuko Wada, University of Minnesota Twin Cities, Earth and Environmental Sciences, Minneapolis, United States and Jiangheng He, Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada
The Interdependence of Plate Coupling Processes, Subduction Rate, and Asthenospheric Pressure Drop across Subducting Slabs (78489)
Leigh Royden, Massachusetts Institute of Technology, Cambridge, MA, United States, Adam Holt, University of Miami, Rosenstiel School of Marine, Atmospheric, and Earth Science, Miami, FL, United States and Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States
The dynamics of double slab subduction from numerical and semi-analytic models (76913)
Adam Holt, University of Miami, Rosenstiel School of Marine, Atmospheric, and Earth Science, Miami, FL, United States, Leigh Royden, Massachusetts Institute of Technology, Cambridge, MA, United States and Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States
3D Geometry and Kinematics of the Taiwan Arc-continent Collision (69166)
Sara Carena, Ludwig Maximilians University of Munich, Munich, Germany, John Suppe, NTU National Taiwan University, Taipei, Taiwan and Yih-Min Wu, Academia Sinica, Institute of Earth Sciences, Taipei, Taiwan

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