T052
Geophysical, Mechanical, and Geologic Constraints on the Subduction Interface I

Wednesday, 16 December 2020: 04:00-05:00
Virtual
Primary Convener:  Helen A Janiszewski, University of Hawaii at Manoa, Earth Sciences, Honolulu, HI, United States
Conveners:  Cailey Brown Condit, University of Washington, Seattle, WA, United States, Noel M Bartlow, University of California Berkeley, Berkeley, CA, United States and Melodie E French, Rice University, Houston, TX, United States
Primary Liaison:  Helen A Janiszewski, University of Hawaii at Manoa, Earth Sciences, Honolulu, HI, United States
Chairs:  Cailey Brown Condit, University of Washington, Seattle, WA, United States, Noel M Bartlow, University of Missouri, Columbia, MO, United States and Melodie E French, Rice University, Houston, TX, United States
OSPA Liaison:  Cailey Brown Condit, University of Washington, Seattle, WA, United States
04:00
T052-01
Metamorphic thermobarometry captures a rheology-controlled subduction depth limit in exhumed high-pressure/low-temperature rocks exposed on Syros, Greece (Invited) (665346)
Alissa Kotowski, Department of Earth and Planetary Sciences McGill University, Montreal, Canada, Whitney M Behr, Structural Geology and Tectonics Group, Geological institute, ETH Zurich, Zürich, Switzerland and Kyle T Ashley, Virginia Polytechnic Institute, Blacksburg, VA, United States
04:04
T052-02
Does the stability of talc in the mantle wedge control the maximum depth of slab-wedge decoupling in subduction zones? (671224)
Simon M Peacock, University of British Columbia, Vancouver, BC, Canada and Kelin Wang, Geological Survey of Canada, Pacific Geoscience Centre, Sidney, BC, Canada
04:08
T052-03
Rheology of Talc at High P-T Conditions with Implications for Subduction-zone Interface (722565)
Yuval Boneh, Ben-Gurion University of the Negev, Beer Sheva, Israel, Matej Pec, Massachusetts Institute of Technology, Cambridge, MA, United States and Greg Hirth, Brown Univeristy, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States
04:12
T052-04
Metamorphic Controls on Brittle Fracturing in Ductile Shear Zones along the Subduction Interface - Perspectives from the Rock-Record and Phase Equilibrium Models (691057)
Christopher J Tulley, Cardiff University, School of Earth and Ocean Sciences, Cardiff, CF24, United Kingdom, Ake Fagereng, Cardiff University, Cardiff, CF24, United Kingdom, Kohtaro Ujiie, University of Tsukuba, Tsukuba, Japan, Johann F.A. Diener, University of Cape Town, Department of Geological Sciences, Cape Town, South Africa and Chris Harris, University of Cape Town, Department of Geological Sciences, Rondebosch, South Africa
04:16
T052-05
Cascadia low frequency earthquakes along the base of an overpressured subduction shear zone (676373)
Andrew J Calvert, Simon Fraser University, Burnaby, BC, Canada, Michael G Bostock, University of British Columbia, Vancouver, BC, Canada, Genevieve Savard, University of Calgary, Calgary, AB, Canada and Martyn Jonathan Unsworth, University of Alberta, Department of Physics, Edmonton, AB, Canada
04:20
T052-06
A high-density nodal array to study the structure and seismogenic behavior of the southern Cascadia forearc (714392)
Jonathan R Delph, Purdue University, Department of Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States and Amanda Thomas, University of Oregon, Department of Earth Sciences, Eugene, OR, United States
04:24
T052-07
Forearc Mantle Helium as a Constraint on Location of the Seismogenic Zone along the Cascadia Subduction Interface (686704)
Patricia A McCrory1, James E Constantz1, Andrew G Hunt2 and J. Luke Luke Blair1, (1)U.S. Geological Survey, Menlo Park, CA, United States, (2)U.S. Geological Survey, Denver, CO, United States
04:28
T052-08
Constraints on Fluid Transport and Sequestration in the Cascadia Subduction Zone from 3D inversion of an Amphibious Magnetotelluric Array (749938)
Gary D Egbert1, Bo Yang2, Paul Bedrosian3, Kerry Key4, Dean Livelybrooks5, Adam Schultz6, Blake Anthony Parris5 and Anna Kelbert7, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)Zhejiang University, Hangzhou, China, (3)USGS, Geology, Geophysics, and Geochemistry Science Center, Denver, CO, United States, (4)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (5)University of Oregon, Eugene, OR, United States, (6)Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States, (7)USGS Geologic Hazards Science Center, Golden, CO, United States
04:32
Discussion
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