V018
Volatile Cycling in Subduction Zones: a Holistic Approach from Slab to Surface
Session ID#: 160527
Session Description:
Convergent margins are host to voluminous volatile fluxes, which have considerable environmental and economic consequences. There is growing interest for the potential role of slab-derived volatile species in the mantle wedge, both as recycling and redox agents. This session is intended to bridge gaps between the various approaches used to investigate the cycling of sulfur and other volatiles and halogens from slab-related fluid devolatilization to volcanic and hydrothermal outputs at the surface. We welcome cross-disciplinary contributions that explore, but are not limited to, volatile solubility, speciation and isotope systematics in volcanic and intrusive rocks, exhumed high-P metamorphic rocks, volcanic gases, fluid inclusions, ore-forming magmatic-hydrothermal systems, as well as experimental and theoretical studies. We also encourage studies that indirectly address volatile cycles, for example by investigating redox-sensitive trace element mobility. Collectively, these various perspectives aim to drive our community towards a more holistic understanding of the intricate relationships between the sources and fluxes of volatiles in subduction zones and their associated redox mechanisms.
Index Terms:
1030 Geochemical cycles [GEOCHEMISTRY]
1031 Subduction zone processes [GEOCHEMISTRY]
3612 Reactions and phase equilibria [MINERALOGY AND PETROLOGY]
8430 Volcanic gases [VOLCANOLOGY]
Primary Convener: Patrick Beaudry, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, United States
Conveners: Herve Rezeau, University of Arizona, Department of Geosciences, Tucson, United States, Michelle Muth, Smithsonian National Museum of Natural History, Washington, DC, United States and Alicia M Cruz-Uribe, University of Maine, Orono, ME, United States
Oxygen fugacity range of subducting crust inferred from fractionation of trace elements during fluid-present slab melting in the presence of anhydrite versus sulfide (Invited) (1073939)
Proteek Chowdhury, University of California, Riverside, Department of Earth and Planetary Sciences, Riverside, CA, United States, Rajdeep Dasgupta, Rice University, Department of Earth, Environmental, and Planetary Sciences, Houston, TX, United States, Patrick Phelps, Rice University, Houston, TX, United States, Gelu Costin, Rice University, Earth, Environmental, and Planetary Sciences, Houston, United States and Cin-Ty Lee, Rice Univ, Houston, TX, United States
Sulfur Isotope Systematics of Island Arc Cumulates: Polaris Alaskan-type Ultramafic-Mafic Intrusion, North American Cordillera (1077011)
Dejan Milidragovic1, James A Nott2, Dylan W Spence2, Dirk Schumann3, James S Scoates2 and Richard A Stern4, (1)Geological Survey of Canada Pacific, Vancouver, BC, Canada, (2)Pacific Centre for Isotopic and Geochemical Research, University of British Columbia, Vancouver, BC, Canada, (3)Fibics Incorporated, Ottawa, ON, Canada, (4)Canadian Centre for Isotopic Microanalysis, University of Alberta, Edmonton, AB, Canada
Oxidation of Slab-derived Fluids by Subducted Metasedimentary Rocks and its Impact on the Oxygen Fugacity of Arc Magmas and the Mantle (Invited) (1095492)
Jay James Ague1, Santiago Tassara2, Megan Holycross3, Ji-Lei Li4, Elizabeth Cottrell5, Esther Martina Schwarzenbach6, Charalampos Fassoulas7 and Timm John6, (1)Yale University, Department of Earth and Planetary Sciences, New Haven, CT, United States, (2)Yale University, Department of Earth and Planetary Sciences, New Haven, United States, (3)Cornell University, Department of Earth and Atmospheric Sciences, Ithaca, NY, United States, (4)Chinese Academy of Sciences, Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Beijing, China, (5)Smithsonian, NMNH, Department of Mineral Sciences, Washington, DC, United States, (6)Free University of Berlin, Institut für Geologische Wissenschaften, Berlin, Germany, (7)University of Crete, Natural History Museum of Crete, Heraklion, Greece
Viscosity of Albite-H2O Fluids by Molecular Dynamics: Implications for Subduction-Zone Melts (1096801)
Yang Li, University of California Los Angeles, Los Angeles, CA, United States, Craig E Manning, Univ California Los Angeles, Los Angeles, CA, United States, Jie Deng, University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, CA, United States and Lars P Stixrude, University of California Los Angeles, Department of Earth, Planetary and Space Sciences, Los Angeles, United States
Nitrogen Behavior in Metabasic Rocks from a Low-Angle Subduction Zone: Insights From Amphibolite and Epidote-Blueschists from the Qiantang Metamorphic Belt, Central Tibet (1103744)
Ananya Mallik, University of Arizona, Geosciences, Tucson, AZ, United States, Anna M Rebaza, University of Arizona, Tucson, AZ, United States, Long Li, University of Alberta, Edmonton, AB, Canada, Yifan Du, University of Alberta, Department of Earth & Atmospheric Sciences, Edmonton, Canada, Ahmed Sami Alshams, University of Arizona, Department of Geosciences, Tucson, United States and Paul A Kapp, Univ Arizona, Tucson, AZ, United States
Hydrocarbon Signatures in Ophiolitic Diamonds, New Caledonia (1133149)
Daniel Patias1, Jonathan C Aitchison1, Renjie Zhou1, Jitraporn Vongsvivut2, Trevor R Ireland1 and Dominique Cluzel3, (1)The University of Queensland, School of Earth and Environmental Sciences, Brisbane, QLD, Australia, (2)Australian Nuclear Science and Technology Organization, Clayton, VIC, Australia, (3)Université de la Nouvelle-Calédonie, Institut des Sciences Exactes et Appliquées, Nouméa, New Caledonia
Ophiolitic biodiamonds – some of subduction’s little gems (1136230)
Jonathan C Aitchison1, Dominique Cluzel2, Trevor R Ireland3, Daniel Patias3 and Renjie Zhou3, (1)University of Queensland, School of Earth and Environmental Sciences, St Lucia, QLD, Australia, (2)Université de la Nouvelle-Calédonie, Institut des Sciences Exactes et Appliquées, Nouméa, New Caledonia, (3)The University of Queensland, School of Earth and Environmental Sciences, Brisbane, QLD, Australia
F, Cl, and H2O Contents of Nominally Anhydrous Minerals in Variably Metasomatized North American Sub-Continental Lithospheric Mantle Xenoliths (1156401)
George Segee-Wright, University of Texas at Austin, Austin, United States, John C Lassiter, University of Texas at Austin, Dept. of Geological Sciences, Jackson School of Geosciences, Austin, TX, United States, Jaime Barnes, University of Texas at Austin, Department of Geological Sciences, Austin, TX, United States, Véronique Le Roux, Woods Hole Oceanographic Inst, Geology & Geophysics Department, Woods Hole, MA, United States and Brian Monteleone, Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
The partitioning of ferric and ferrous iron between garnet and melt in subduction zones (1177910)
Megan Holycross, Cornell University, Department of Earth and Atmospheric Sciences, Ithaca, NY, United States and Elizabeth Cottrell, Smithsonian, NMNH, Department of Mineral Sciences, Washington, DC, United States
Sulfur isotope fractionation during arc crust formation and differentiation: Evidence from the Talkeetna island arc, south-central Alaska (1186277)
Herve Rezeau1,2, Oliver E Jagoutz2, Patrick Beaudry2, Gareth Izon2, Shuhei Ono2 and Peter B Kelemen3, (1)University of Arizona, Department of Geosciences, Tucson, United States, (2)Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, United States, (3)Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, United States
