T33F:
Fluid Migration Through Subduction Zones: Observations and the Consequences on Geodynamic Processes and Natural Hazards

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Session ID#: 31184

Session Description:
Water plays a vital role in the Earth's evolution. At subduction plate boundaries, vast quantities of fluid are exchanged between the Earth, ocean and atmosphere; however, water transport through subduction zones is only partially understood. Volatile cycling is fundamental to the petrogenesis and eruption of arc magmas. Fluids and dehydration reactions may also play a key role in the earthquake cycle. This session will address some key scientific questions of volatile cycling. What is the role of the slab mantle as a vessel for transporting water into the subduction zone? What are the pathways of volatiles through the subduction system thereby impacting geodynamic processes (e.g. mantle flow)? How are volatile pathways manifested in seismic, volcanic and mineralization potential? We welcome contributions from a range of studies on diverse subduction environments from various disciplines (e.g., but not limited to: geophysical imaging, rock physics, geochemistry, geodynamic modelling).
Primary Convener:  Stephen Paul Hicks, University of Southampton, Southampton, United Kingdom
Conveners:  Lidong Bie, University of Liverpool, Liverpool, L69, United Kingdom and Andreas Rietbrock, University of Liverpool, Liverpool, United Kingdom
Chairs:  Lidong Bie, University of Liverpool, Liverpool, L69, United Kingdom, Stephen Paul Hicks, University of Southampton, Southampton, SO14, United Kingdom and Andreas Rietbrock, Karlsruhe Institute of Technology, Geophysical Institute, Karlsruhe, Germany
OSPA Liaison:  Stephen Paul Hicks, University of Southampton, Southampton, SO14, United Kingdom

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

7230 Seismicity and tectonics [SEISMOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]
8185 Volcanic arcs [TECTONOPHYSICS]
8439 Physics and chemistry of magma bodies [VOLCANOLOGY]

Abstracts Submitted to this Session:

Imaging hydration and dehydration across the Cascadia subduction zone (Invited) (Invited) (258405)
Geoffrey A Abers1, Peter E van Keken2, Bradley R Hacker3,4, Michael Everett Mann1, Kayla Crosbie1 and Kenneth Creager5, (1)Cornell University, Ithaca, NY, United States, (2)Carnegie Institution for Science Washington, Washington, DC, United States, (3)University of California Santa Barbara, Department of Earth Science, Santa Barbara, CA, United States, (4)University of California Santa Barbara, Santa Barbara, CA, United States, (5)Univ Washington, Seattle, WA, United States
Plateau subduction, intraslab seismicity and the Denali Volcanic Gap (245839)
Michael G Bostock, University of British Columbia, Vancouver, BC, Canada, Lindsay Yuling Chuang, Georgia Institute of Technology Main Campus, Earth and Atmospheric Science, Atlanta, GA, United States, Aaron Wech, U.S. Geological Survey, Alaska Volcano Observatory, Anchorage, AK, United States and Alexandre P Plourde, Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada
Heterogeneity in Subducting Slab Influences Fluid Properties, Plate Coupling and Volcanism: Hikurangi Subduction Zone, New Zealand (211811)
Donna Eberhart-Phillips, Martin Reyners and Stephen C Bannister, GNS Science, Lower Hutt, New Zealand
Velocity Structure of the Subducted Yakutat Terrane, Alaska: Insights from Guided Waves (254938)
Sophie Coulson1, Thomas Garth2 and Andreas Rietbrock2, (1)Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States, (2)University of Liverpool, Liverpool, United Kingdom
Numerical Investigation of Dewatering and Fluid Pressure in the Western Nankai Subduction Zone: Implications of Lithostratigraphic Controls (Invited) (275231)
Andre Huepers, University of Bremen, MARUM – Center for Marine Environmental Sciences, Bremen, Germany, Demian M Saffer, Penn State University, Department of Geosciences, University Park, PA, United States and Achim Kopf, University of Bremen, Bremen, Germany
Numerical simulations of water transport in subduction zone: Influences of serpentinized layer in oceanic slabs on subduction dynamics (247499)
Atsushi Nakao, Earthquake Research Institute, University of Tokyo, Tokyo, Japan, Iwamori Hikaru, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan, Tomoeki Nakakuki, Hiroshima Univ, Higashi-Hiroshima, Japan, Yujiro Suzuki, ERI, Univ. Tokyo, Tokyo, Japan and Hitomi Nakamura, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan

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