T028:
New Insights On The Cascadia Subduction Zone From Offshore And Amphibious Studies

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Session ID#: 24812

Session Description:
Subduction zones, one of Earth’s fundamental tectonic environments, play a key role in many Earth processes. Consequently, they require study by interdisciplinary methods. However, our understanding of subduction zones has been limited by a lack of offshore and amphibious data. At the Cascadia subduction zone, new data collected over the last several years have helped close this gap, elucidating a wide range of new insights, including the structure of the incoming lithosphere, the role of water and volatiles in the subducting plate, asthenospheric flow above and below the subducting lithosphere, the transition from locking to slipping behavior along the plate interface, and the nature of episodic tremor and slip. We invite contributions broadly related to Cascadia geoscience that focus on new results from seismology, magnetotellurics, geodesy, geodynamics, hazards, paleoseismology, geochemisty and petrology, with particular emphasis on insights gained from the contribution of offshore and amphibious data.
Primary Convener:  Helen A Janiszewski, Columbia University of New York, Palisades, NY, United States
Conveners:  William Bythewood Hawley, University of California Berkeley, Berkeley, CA, United States, Kerry Key, Institute of Geophysics and Planetary Physics La Jolla, La Jolla, CA, United States and Matthew James Cook, Scripps Institution of Oceanography, La Jolla, CA, United States
Co-Organized with:
Tectonophysics, and Seismology

Cross-Listed:
  • G - Geodesy
  • GP - Geomagnetism, Paleomagnetism and Electromagnetism
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1209 Tectonic deformation [GEODESY AND GRAVITY]
3006 Marine electromagnetics [MARINE GEOLOGY AND GEOPHYSICS]
3050 Ocean observatories and experiments [MARINE GEOLOGY AND GEOPHYSICS]
8170 Subduction zone processes [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Sampath Rathnayaka, University of Massachusetts Amherst, Amherst, MA, United States and Haiying Gao, University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States
Emily Morton, New Mexico Institute of Mining and Technology, Earth and Environmental Science, Socorro, NM, United States, Susan L Bilek, New Mexico Tech, Socorro, NM, United States and Charlotte A Rowe, Los Alamos National Laboratory, Los Alamos, NM, United States
Thomas M Brocher, U.S. Geological Survey, Menlo Park, CA, United States
Haiying Gao, University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States
Erin A Wirth1,2, Arthur D Frankel3, John Emilio Vidale4, Ian Stone2, Marafi Nasser2 and William J Stephenson5, (1)University of Washington, Earth and Space Sciences, Seattle, WA, United States, (2)University of Washington, Seattle, WA, United States, (3)USGS, Seattle, WA, United States, (4)Univ Washington, Seattle, WA, United States, (5)U.S. Geological Survey, Denver, CO, United States

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