DI44A:
The Distribution and Pathways of Melts, Fluids, and Volatiles in Subduction Systems: A Multidisciplinary Approach II

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Session ID#: 16733

Session Description:
Subducting slabs transport geodynamically and geochemically significant quantities of volatiles to the Earth’s interior. A large portion of these materials returns to the surface/crust via volcanic arc and back-arc magmatism. The return flux involves processes from slab dehydration to hydration and melting of the mantle wedge to magma transport and eruption within the overriding plate. These processes are inherent to subduction zone dynamics and impact tectonic forces, and also critical for estimating Earth's water budget. Recent datasets, both onshore and offshore, and improved modeling capabilities provide opportunities to study the transport of melts/fluids/volatiles through the subduction system. We welcome stimulating contributions from all subdisciplines - field observations, laboratory results, and modeling - seeking to harness complementary constraints from multiple data types and to foster interdisciplinary collaboration. We particularly welcome studies using amphibious datasets that show the scientific potential of bridging the land/sea barrier.
Primary Convener:  Songqiao Shawn Wei, Scripps Institution of Oceanography, La Jolla, CA, United States
Conveners:  Ikuko Wada, Department of Earth Sciences, Minneapolis, United States, Zachary Eilon, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Jeffrey Alt, University of Michigan Ann Arbor, Earth & Environmental Sciences, Ann Arbor, MI, United States
Chairs:  Zachary Eilon, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Songqiao Shawn Wei, Scripps Institution of Oceanography, La Jolla, CA, United States
OSPA Liaison:  Zachary Eilon, Lamont-Doherty Earth Observatory, Palisades, NY, United States

Cross-Listed:
  • S - Seismology
  • T - Tectonophysics
  • V - Volcanology, Geochemistry and Petrology

Proposed Co-Organized Session with:
  • T - Tectonophysics
Index Terms:

1031 Subduction zone processes [GEOCHEMISTRY]
3613 Subduction zone processes [MINERALOGY AND PETROLOGY]
7240 Subduction zones [SEISMOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Water Recycling in Subduction Zones: The Role of Rehydration in the Generation of Intermediate-Depth Seismicity and the Nature of the Cold Fore-arc Mantle (Invited) (120747)
Peter E van Keken, Carnegie Institution for Science Washington, Washington, DC, United States, Geoffrey A Abers, Cornell University, Ithaca, NY, United States, Bradley R Hacker, University of California Santa Barbara, Santa Barbara, CA, United States, Junichi Nakajima, Tokyo Institute of Technology, Tokyo, Japan, Saeko Kita, Hiroshima University, Higashi-Hiroshima, Japan, Marc W Spiegelman, Columbia University of New York, Palisades, NY, United States and Cian R Wilson, Columbia University of New York, Palisades, United States
The role of the forearc mantle in the deep water cycle in cold subduction zones: importance of supra-slab sources of water in arc magmas (164077)
Julia Ribeiro, Guangzhou Institute of geochemistry, Guangzhou, China and Cin-Ty Lee, Rice University, Houston, TX, United States
Serpentinization and fluids in the forearc mantle (Invited) (131082)
Bruno Reynard, Ecole Normale Supérieure Lyon, Laboratoire de Géologie de Lyon, Lyon, France
Serpentinites, Silica-Carbonate Alteration, and Mercury Ore Deposits in Coast Range California: Implications for the Deep Hydrology of the California Coast Ranges and the Deep Hydrology of the San Andreas Fault System (188317)
Stephen H Kirby, USGS Retired, Menlo Park, United States
Linking Serpentinite Geochemistry with Possible Alteration and Evolution of Supra-Subduction Wedge Mantle (Invited) (139172)
Marco Scambelluri1, Enrico Cannaò1, Samuele Agostini2 and Mattia Gilio1, (1)University of Genova, Italy, Genova, Italy, (2)Consiglio Nazionale delle Ricerche, Pisa, Istituto di Geoscienze e Georisorse, Pisa, Italy
Constraints on Mantle Serpentinization near the Mariana Trench from Earthquake and Ambient Noise Rayleigh Waves (180143)
Chen Cai, Washington University in St Louis, St. Louis, MO, United States, Douglas Wiens, Washington University in St Louis, Earth and Planetary Sciences, St. Louis, MO, United States and Daniel Lizarralde, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Three-dimensional magnetotelluric imaging of Cascadia subduction zone from an amphibious array (193440)
Bo Yang, China University of Geosciences Wuhan, Wuhan, China, Gary D Egbert, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, Kerry Key, Institute of Geophysics and Planetary Physics La Jolla, La Jolla, CA, United States, Paul Bedrosian, USGS, Denver, CO, United States, Dean Livelybrooks, University of Oregon, Eugene, OR, United States and Adam Schultz, Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States
Investigation of Mount St. Helens seismicity and volcanic arc structure with a hybrid passive and active source survey (Invited) (136488)
Brandon Schmandt1, Steven M Hansen2, Margaret Elizabeth Glasgow3, Xiaofeng Meng4, Eric Kiser5, Alan Levander6, Jiangang Han7, Prof. John Emilio Vidale8, Yadong Wang9, Jamie Farrell10, Fan-Chi Lin11, Geoffrey A Abers12 and Kenneth C Creager7, (1)University of New Mexico, Earth and Planetary Sciences, Albuquerque, United States, (2)University of New Mexico Main Campus, Albuquerque, NM, United States, (3)U.S. Geological Survey, Moffett Field, United States, (4)Georgia Institute of Technology Main Campus, Atlanta, GA, United States, (5)University of Arizona, Department of Geosciences, Tucson, United States, (6)Rice University, Earth, Environmental, and Planetary Science, Houston, TX, United States, (7)Applied Physics Laboratory University of Washington, Seattle, WA, United States, (8)University of Washington, Seattle, United States, (9)University of Utah, Department of Geology & Geophysics, Salt Lake City, UT, United States, (10)University of Utah, Department of Geology and Geophysics, Salt Lake City, United States, (11)University of Utah, Salt Lake City, UT, United States, (12)Cornell University, Ithaca, NY, United States

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