T21B:
The Varied Roles of Aqueous Fluids near the Subduction Interface I


Submit an Abstract to this Session


Session ID#: 57195

Session Description:
Along the subduction plate interface, water influences the rheological and geophysical properties as well as the rates and products of metamorphic reactions. Recent geologic and seismic studies demonstrate that strong feedbacks exist between the fluid-mediated chemical and petrologic evolution of the rock, deformation processes that control fault slip behavior, and geophysical signals we use to interpret physical conditions at depth. Fluid distribution and flux are thought to vary with depth and the permeability structure near the plate interface. These fluids are proposed to control episodic tremor-and-slip, dehydration-induced seismicity, serpentinization of the mantle wedge, overriding plate alteration, and the 4-D evolution in interface bulk-rock compositions, active deformation mechanisms, and rock strength. We invite contributions addressing the varied influence of aqueous fluids near the subduction interface from across the Earth science community including, but not limited to: experimental studies, geodynamics, petrology/geochemistry, structural geology, and geophysics.
Primary Convener:  Cailey Brown Condit, Massachusetts Institute of Technology, Cambridge, MA, United States
Conveners:  Dr. Besim Dragovic, Ph.D., Boise State University, Department of Geosciences, Boise, ID, United States, Jonathan R Delph, Purdue University, Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States and Melodie E French, Rice University, Earth, Environmental and Planetary Sciences, Houston, TX, United States
Primary Liaison:  Cailey Brown Condit, Massachusetts Institute of Technology, Cambridge, MA, United States
Chairs:  Jonathan R Delph, Purdue University, Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States and Dr. Besim Dragovic, Ph.D., Boise State University, Department of Geosciences, Boise, ID, United States
OSPA Liaison:  Cailey Brown Condit, Massachusetts Institute of Technology, Cambridge, MA, United States
Co-Organized with:
Tectonophysics, and Volcanology, Geochemistry and Petrology

Cross-Listed:
  • MR - Mineral and Rock Physics
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology

Proposed Co-Organized Session with:
  • MR - Mineral and Rock Physics
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1031 Subduction zone processes [GEOCHEMISTRY]
7240 Subduction zones [SEISMOLOGY]
8045 Role of fluids [STRUCTURAL GEOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]

Abstracts Submitted to this Session:

The Ingredients of Slow Fault Slip (Invited) (365361)
Roland Burgmann, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, United States
Cyclical Variations in Fluid Pressure and Composition During Brittle Faulting in an Exhumed Analogue of Shallow Megathrusts (N-Apennines, Italy) From Field, Microstructural and REE Investigations (390219)
Francesca Remitti1, Anna Cerchiari2, Anna Cipriani2,3, Andrea Festa4, Silvia Mittempergher5, Federico Lugli6 and Stefano Lugli2, (1)University of Modena and Reggio Emilia, Department of Chemical and Geological Sciences, Modena, Italy, (2)University of Modena and Reggio Emilia, Modena, Italy, (3)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (4)University of Torino, Department of Earth Sciences, Torino, Italy, (5)Università degli Studi di Milano Bicocca, Milano, Italy, (6)University of Bologna, Department of Cultural Heritage, Bologna, Italy
Mechanism of fluid flow near the plate interface: the importance of a thin, low viscosity layer (387696)
Manabu Morishige, Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
Seismicity, Metamorphism, and Fluid Evolution Across the Northern Cascadia Fore Arc (386253)
Genevieve Savard, Michael G Bostock and Nikolas I Christensen, University of British Columbia, Vancouver, BC, Canada
Records of Contrasting Patterns of Fluid Flow Along the Base of the Mantle Wedge from 30–20 km Depths in the Sanbagawa Belt, Japan (368167)
Simon Richard Wallis, The University of Tokyo, Bunkyo-ku, Japan, Mari Yokota, Nagoya University, Department of Earth and Planetary Sciences, Nagoya, Japan; The University of Tokyo, Department of Earth and Planetary Science, Tokyo, Japan, Yui Kouketsu, Nagoya University, Nagoya, Japan and Shunsuke Endo, Shimane University, Department of Geoscience, Matsue, Japan
Multi-stage history of fluids and faults in serpentinites on Syros, Greece (Invited) (422664)
Emily H. G. Cooperdock1,2, Daniel F Stockli2, Natalie H. Raia3,4 and Jaime Barnes5, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)University of Texas at Austin, Austin, TX, United States, (3)University of Arizona, College of Information Science, Tucson, AZ, United States, (4)University of Minnesota Twin Cities, Department of Earth & Environmental Sciences, Minneapolis, United States, (5)University of Texas at Austin, Department of Earth and Planetary Sciences, Austin, United States
Dehydration embrittlement and compaction instabilities in subduction zones (444050)
Jean Sulem, University Paris-Est, Ecole Nationale des Ponts et Chaussées, Laboratoire Navier, Champs-sur-Marne, France, Nicolas Brantut, University College London, Department of Earth Sciences, London, United Kingdom and Ioannis Stefanou, University Paris-Est, Ecole Nationale des Ponts et Chaussées, Laboratoire Navier, Marne-la-Vallee, France; Ecole Centrale de Nantes, Nantes, France
Seismogenesis of Dual Subduction Beneath Kanto, Central Japan Controlled by Fluid Release (382727)
Shoichi Yoshioka1, Yingfeng Ji2, Vlad Constantin Manea3 and Marina Manea3, (1)Kobe University, Research Center for Urban Safety and Security, Kobe, Japan, (2)Kobe University, Kobe, Japan, (3)Centro de Geociencias, UNAM, Queretaro, Mexico

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