T42C:
Subduction Top to Bottom (ST2B-2) VI

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Session ID#: 16036

Session Description:
From top-to-bottom, many geological, geophysical, petrologic/geochemical, and theoretical advances have been made toward understanding subduction zone processes and dynamics since AGU Geophysical Monograph “Subduction Top to Bottom” was published 20 years ago. This session and a related themed issue in GEOSPHERE are intended to revisit the issues that were explored in the 1996 publication and re-assess them in light of recent advancements as well as explore new discoveries and advances in subduction zone research. We invite the broadest possible range of contributions, including subduction-related hazards (volcanic eruptions, earthquakes and tsunamis) and resources.
Primary Convener:  Gray E Bebout, Lehigh University, Dept. Earth and Environmental Sciences, Bethlehem, PA, United States
Conveners:  David William Scholl, USGS Geological Survey, Emeritus, Earthquake Science Center, Moffett Field, CA, United States, Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, TX, United States and Philippe Agard, Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP, Paris, France
Chairs:  Philippe Agard, Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP, Paris, France and Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, TX, United States
OSPA Liaison:  Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, TX, United States

Cross-Listed:
  • DI - Study of the Earth's Deep Interior
  • MR - Mineral and Rock Physics
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1031 Subduction zone processes [GEOCHEMISTRY]
7240 Subduction zones [SEISMOLOGY]
8104 Continental margins: convergent [TECTONOPHYSICS]
8413 Subduction zone processes [VOLCANOLOGY]

Abstracts Submitted to this Session:

3-D imaging of two episodes of Hikurangi Plateau subduction in the southern South Island of New Zealand (Invited) (119216)
Donna Eberhart-Phillips1, Martin Reyners2, Phaedra Upton1 and David Gubbins3, (1)GNS Science, Lower Hutt, New Zealand, (2)GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, (3)University of Leeds, Leeds, LS2, United Kingdom
Cascadia Seismicity Related to Seamount Subduction as detected by the Cascadia Initiative Amphibious Data (129204)
Emily Morton, University of Nevada Reno, Nevada Seismological Laboratory, Reno, United States, Susan L Bilek, New Mexico Institute of Mining and Technology, Earth and Environmental Science, Socorro, United States and Charlotte A Rowe, Los Alamos National Laboratory, Los Alamos, NM, United States
Latest-Miocene onset of Nankai Trough Subduction due to regional Change in Plate tectonic Framework (Invited) (137787)
Gaku Kimura, Department of Marine Resources and Environment, Tokyo University of Marine Science and Technology, Tokyo, Japan, Hiroaki Koge, Atmosphere and Ocean Research Institute University of Tokyo, Tokyo, Japan, Takeshi Tsuji, Kyushu University, Department of Earth Resources Engineering, Fukuoka, Japan and Gregory F Moore, University of Hawaii at Manoa, Earth Sciences, Honolulu, United States
Evidence for a fluid-rich layer along the Nankai-trough megathrust fault off the Kii Peninsula inferred from receiver function inversion (143418)
Takeshi Akuhara1,2, Kimihiro Mochizuki1, Hitoshi Kawakatsu1 and Nozomu Takeuchi3, (1)Earthquake Research Institute, The University of Tokyo, Tokyo, Japan, (2)University of British Columbia, Department of Earth, Ocean and Atmosphere Sciences, Vancouver, BC, Canada, (3)Earthquake Research Institute, University of Tokyo, Tokyo, Japan
The Role of Proto-Thrusts in Frontal Accretion and Accommodation of Plate Convergence, Hikurangi Subduction Margin, New Zealand (151386)
Philip Barnes, National Institute of Water and Atmospheric Research, Wellington, New Zealand, Francesca Ghisetti, TerraGeologica, Christchurch, New Zealand, Susan M Ellis, GNS Science, Lower Hutt, New Zealand and Julia Morgan, Rice University, Houston, TX, United States
Improved 3D seismic images of dynamic deformation in the Nankai Trough off Kumano (153070)
Kazuya Shiraishi1, Gregory F Moore2, Yasuhiro Yamada3, Masataka Kinoshita4, Yoshinori Sanada1 and Gaku Kimura5, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)University of Hawaii at Manoa, Earth Sciences, Honolulu, United States, (3)JAMSTEC, ODS, Kanagawa, Japan, (4)The University of Tokyo, Earthquake Research Institute, Tokyo, Japan, (5)Department of Marine Resources and Environment, Tokyo University of Marine Science and Technology, Tokyo, Japan
Marine forearc tectonics in the unbroken segment of the Northern Chile seismic gap (155087)
Jacob Geersen1, Jan Behrmann1, Cesar R Ranero2, Ingo Klaucke1, Heidrun Kopp1, Dietrich Lange1, Udo Barckhausen3, Christian J Reichert4 and Juan Diaz-Naveas5, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)ICM-CSIC, Barcelona Center for Subsurface Imaging, ICREA at CSIC, Instituto de Ciencias del Mar, Barcelona, Spain, Barcelona, Spain, (3)BGR Federal Institute for Geosciences and Natural Resources, Hanover, Germany, (4)BGR Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (5)Pontifica Universidad Catolica de Valparaiso, Escuela de Ciencias del Mar, Valparaiso, Chile
Bradley Lake: There and Back Again, Additional Sedimentary Evidence for Earthquakes (170027)
Jason R Patton, Humboldt State University, Arcata, CA, United States and Chris Goldfinger, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States

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