V24B:
New Insights into the Origin and Fate of Subduction Zone Fluids and Melts I

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Session ID#: 18120

Session Description:
Subduction zones are the primary sites of chemical exchange between the Earths’s surface and interior. The release of fluids and silicate melts from the down-going slab results in mass transfer, element cycling, metasomatism, crustal melting, and can trigger earthquakes. Recent advances have lead to novel isotopic and geochemical proxies to fingerprint the origin of subduction-derived fluids and melts both in exhumed subduction materials and arc magmas. We invite submissions offering new insights into the processes governing the production and evolution of fluids and melts from the subducting slab, especially those employing new applications of geochemical and isotopic proxies.  Contributions are sought from all relevant studies involving subduction fluids including, but not limited to, field investigations, stable isotope geochemistry, trace element geochemistry, mineralogy, experiments, and both numerical and thermodynamic modelling.
Primary Convener:  Catherine A. Macris, Indiana University Indianapolis, Department of Earth and Environmental Sciences, Indianapolis, United States
Conveners:  Carrie A Menold, Albion College, Earth & Environment, Albion, MI, United States and Craig E Manning, Univ California Los Angeles, Los Angeles, CA, United States
Chairs:  Catherine A. Macris, Indiana University Indianapolis, Department of Earth and Environmental Sciences, Indianapolis, United States and Carrie A Menold, Albion College, Earth & Environment, Albion, MI, United States
OSPA Liaison:  Catherine A. Macris, Indiana University Indianapolis, Department of Earth and Environmental Sciences, Indianapolis, United States
Index Terms:

1031 Subduction zone processes [GEOCHEMISTRY]
1041 Stable isotope geochemistry [GEOCHEMISTRY]
3610 Geochemical modeling [MINERALOGY AND PETROLOGY]
3653 Fluid flow [MINERALOGY AND PETROLOGY]

Abstracts Submitted to this Session:

Noble Gases Trace Earth’s Subducted Water Flux (194844)
Andrew Smye, Pennsylvania State University Main Campus, Department of Geosciences, University Park, United States, Colin Jackson, Geophysical Laboratory of the Carnegie Institution for Science, Washington, DC, United States, Matthias Konrad-Schmolke, University of Potsdam, Potsdam, Germany, Stephen Wayne Parman, Brown University, DEEPS - Dept of Earth, Environmental and Planetary Sciences, Providence, United States and Chris J. Ballentine, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
Argon, Oxygen, and Boron Isotopic Evidence Documenting 40ArE Accumulation in Phengite during Water-Rich High-Pressure Subduction Metasomatism of Continental Crust (163998)
Carrie A Menold, Albion College, Earth & Environment, Albion, MI, United States, Marty Grove, Stanford University, Earth and Planetary Sciences, Stanford, United States and Natalie Elizabeth Sievers, Stanford University, Stanford, CA, United States
Birth of subduction components preserved in fluid inclusions. (139857)
Simona Ferrando, University of Torino, Department of Earth Sciences, Torino, Italy, Maria-Luce Frezzotti, University Milan Bicocca, Department of Earth and Environmental Sciences, Milan, Italy and Maurizio Petrelli, University of Perugia, Department of Physics and Geology, Perugia, Italy
Experimental Determinations of the Fate of Subduction Zone Fluids and Melts at the Base of the Mantle Wedge Highlight the Similarity of First Melts of Vapor-Saturated Lherzolite and Slab Eclogite (186963)
Timothy L Grove, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, United States and Christy B. Till, Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States
Dissociation of aqueous silica at high P-T and implications for metal complexes in subduction-zone fluids (134827)
Fang Huang, CSIRO, Mineral Resources, Kensington, WA, Australia and Dimitri A Sverjensky, Johns Hopkins University, Department of Earth & Planetary Sciences, Baltimore, MD, United States
Tracing fluid transfer across subduction zones using iron and zinc stable isotopes (Invited) (123030)
Helen M. Williams, University of Cambridge, Cambridge, United Kingdom, Baptiste Debret, Laboratoire G-TIME, Université Libre de Bruxelles, Bruxelles, Belgium, Marie-Laure Pons, University of Durham, Durham, DH1, United Kingdom and Pierre Bouilhol, Durham University, Durham, United Kingdom
Using Li and Its Isotopes as a Tracer of Subduction-Related Metamorphic Fluid-Rock Interactions (Invited) (147923)
Sarah Penniston-Dorland, University of Maryland College Park, Department of Geology, College Park, MD, United States and Dr. Besim Dragovic, Ph.D., University of South Carolina, Columbia, SC, United States
The Global Array of Primitive Arc Melts: the Nature of the Slab Component and its Heterogeneous Addition to the Mantle Wedge (146026)
Max W Schmidt, ETH Zurich, Zurich, Switzerland and Oliver E Jagoutz, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, United States

See more of: Volcanology, Geochemistry and Petrology