T34B:
Cumulative Deformation in the Overlying Plate due to Subduction and Related Feedbacks III


Session ID#: 10791

Session Description:
Subduction over time modifies the overriding plate by fractionation, accretion, and tectonic deformation. This can lead to processes such as tectonic shortening (orogeny), regional uplift, weakening by back-arc spreading and volcanism, basin formation, and/or destabilization of the lithosphere. In turn, the composition, strength, and morphology of the overlying plate, which may be the product of a long geological history and have significant along-strike variations, can affect current large-scale subduction dynamics such as slab dip, and ultimately broad-scale plate kinematics in two and three dimensions. Examples of geological settings that bear witness to these processes are found along the Pacific Rim, the Tethys margin, including the Mediterranean mobile belt, and northwestern North America. We seek contributions from all disciplines, including geodesy, geology, geochemistry, seismology, and geodynamics, that document the tectonic evolution of overlying plate deformation and their link to subduction processes.
Primary Convener:  Hiroshi Sato, University of Tokyo, Bunkyo-ku, Japan
Conveners:  David A Okaya, University of Southern California, Los Angeles, CA, United States, Susan M Ellis, GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand and Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, United States
Chairs:  Thomas M Brocher, U.S. Geological Survey, Earthquake Science Center, Menlo Park, CA, United States and Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, United States
OSPA Liaison:  David A Okaya, University of Southern California, Los Angeles, CA, United States

Cross-Listed:
  • G - Geodesy
  • NH - Natural Hazards
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1209 Tectonic deformation [GEODESY AND GRAVITY]
7240 Subduction zones [SEISMOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]
8175 Tectonics and landscape evolution [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Active Deformation in the Overriding Plate Associated with Temporal Changes of the Philippine Sea Plate Motion (Invited) (59091)
Tatsuya Ishiyama1, Hiroshi Sato1 and Anne Van Horne2, (1)Earthquake Research Institute, The University of Tokyo, Tokyo, Japan, (2)University of Wyoming, Department of Geology and Geophysics, Laramie, WY, United States
Mountain building on top of a flipping subduction zone (79736)
Christoph von Hagke, RWTH Aachen University, Institute of Structural Geology, Tectonics and Geomechanics, Aachen, Germany, Mélody Maéva Philippon, University of the French West Indies and Guiana, Fouillole, Finland, Jean-Philippe Avouac, California Institute of Technology, Geological and Planetary Sciences, Pasadena, CA, United States and Michael Gurnis, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States
Late Cenozoic deformation of the Eurasian and Burma Plates due to subduction of the Indian Plate beneath SE Tibetan Plateau and Myanmar (65495)
James Ni, New Mexico State University Main Campus, Las Cruces, NM, United States, William E Holt, Stony Brook University, Department of Geosciences, Stony Brook, NY, United States, Lucy M Flesch, Purdue University, Department of Earth, Atmospheric, and Planetary Sciences, West Lafayette, United States, Eric A Sandvol, University of Missouri, Columbia, MO, United States, Thomas M Hearn, New Mexico State University, Las Cruces, NM, United States and Nicholas C Schmerr, University of Maryland, Department of Geology, College Park, United States
The Cascadia Paradox: Understanding Mantle Flow in the Cascadia Subduction System (Invited) (68550)
Maureen D Long, Yale University, Department of Earth & Planetary Sciences, New Haven, United States
Rotation of the Pacific Northwest and Deformation Across the Yakima Fold and Thrust Belt Estimated with GPS (Invited) (66614)
Robert McCaffrey1, Robert W King2, Matthew Lancaster1, M Meghan Miller3 and Ray E Wells4, (1)Portland State University, Portland, OR, United States, (2)MIT, Cambridge, MA, United States, (3)UNAVCO, Boulder, CO, United States, (4)U.S. Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, Portland, OR, United States
The role of oblique strike-slip faulting in the tectonics of the Puget Lowlands and throughout the Pacific Northwest (Invited) (81829)
Katie M Keranen, Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States
Is the Record of Crustal Strain in the Pacific Northwest in the Holocene, as Revealed by Paleoseismic Investigations, Consistent with Regional Clockwise Rotation in the Cascadia Backarc and Forearc? (Invited) (62868)
Harvey M Kelsey, Humboldt State University, Arcata, CA, United States, Richard J Blakely, USGS Western Regional Offices Menlo Park, Menlo Park, United States, Lydia Staisch, USGS, Menlo Park, CA, United States and Brian L Sherrod, U.S. Geological Survey, Seattle, WA, United States
Dynamic Subsidence across the Late Cretaceous Western Interior Basin in Response to Farallon Slab Subduction (58262)
Shaofeng Liu, China University of Geosciences (Beijing), State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources, Beijing, China, Dag Nummedal, China University of Geosciences Beijing, College of Geosciences & Resources, Beijing, China and Lijun Liu, University of Illinois at Urbana Champaign, Geology, Urbana, United States

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