V034
Volatiles and redox in the mantle
Session ID#: 250693
Session Description:
The redox state of the Earth’s mantle is controlled by the interplay between iron and volatile elements (H, C, S), owing to their multivalent nature. It is also characterized by spatial and temporal variability, but the scale of this variability remains a matter of debate. Mantle samples from various depths and tectonic settings provide windows into the redox reactions that occur within mantle domains, as determined by measurements of iron oxidation state (Fe2 , Fe3 , Fe0), stability of volatile-bearing phases (diamond, sulfide, carbonate, etc.) and oxybarometry calculations. In this session we welcome contributions aimed at understanding the redox state and evolution of the mantle, the transport and storage of mantle volatiles, and the interactions between fluids, melts, metals and minerals across a wide range of depths (i.e. upper mantle, lower mantle and transition zone). We aim to bring together petrological, analytical, modelling, experimental and theoretical approaches.
Co-Sponsor(s):
Index Terms:
1012 Reactions and phase equilibria [GEOCHEMISTRY]
1025 Composition of the mantle [GEOCHEMISTRY]
1038 Mantle processes [GEOCHEMISTRY]
1065 Major and trace element geochemistry [GEOCHEMISTRY]
Primary Convener: Patrick Beaudry, Johns Hopkins University, Department of Earth & Planetary Sciences, Baltimore, United States
Conveners: Kate Kiseeva, American Museum of Natural History, New York, United States and Hongluo Zhang, China University of Geosciences, State Key Laboratory of Geological Processes and Mineral Resources, Beijing, China
Contrasting histories for Late Paleozoic orogenic peridotites from Eastern Alaska and Northern British Columbia (1847424)
John Gregory Shellnutt1, Kuo-Lung Wang2, Yoshiyuki Iizuka2 and Wei-Yu Chen3, (1)NTNU National Taiwan Normal University, Taipei, Taiwan, (2)Academia Sinica, Institute of Earth Sciences, Taipei, Taiwan, (3)Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan
Reevaluating the Oxidation States of Arc Magmas (1849166)
Yves Moussallam, Columbia University, Lamont-Doherty Earth Observatory, New York, NY, United States, Guillaume Georgeais, Lamont -Doherty Earth Observatory, Palisades, United States and Dr. Shuo Ding, Lamont-Doherty Earth Observatory, Palisades, United States
Water contents of oceanic lithospheric mantle decoded from petit-spot mantle xenoliths (1876988)
Yuto Sato1, Norikatsu Akizawa2, Akira Ishikawa Dr3, Kenji Shimizu4, Takayuki Ushikubo4, Shiki Machida5 and Naoto Hirano6, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kochi Institute for Core Sample Research, Kanagawa, Japan, (2)Hiroshima University, Higashi-Hiroshima, Japan, (3)Institute of Science Tokyo, Tokyo, Japan, (4)JAMSTEC, Kochi Institute for Core Sample Research, Kochi, Japan, (5)Chiba Institute of Technology, Ocean Resources Research Center for Next Generation, Chiba, Japan, (6)Tohoku University, Center for Northeast Asian Studies, Sendai, Japan
Geochemistry and Redox State of the Wyoming Craton from Eclogite Xenoliths from the District Line Kimberlites (1900887)
Kate Kiseeva1, Rondi Davies2, Michael C. Jollands3, Hongluo Zhang4, Nester Korolev1, Shuai Ma5, Ilya Kupenko6 and Alexander I Chumakov6, (1)American Museum of Natural History, New York, United States, (2)City University of New York, New York, United States, (3)Gemological Institute of America, New York, United States, (4)China University of Geosciences, State Key Laboratory of Geological Processes and Mineral Resources, Beijing, China, (5)University College Cork, Cork, Ireland, (6)ESRF European Synchrotron Radiation Facility, Grenoble, France
Oxyhydrides – A Potential Overlooked Component of Mantle Hydration (1921236)
William R Palfey, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Sonjong Hwang, California Institute of Technology, Chemical Engineering, Pasadena, United States, Wiliiam A. Goddard III, California Institute of Technology, Materials and Process Simulation Center (MSC), Pasadena, United States and George R Rossman, California Institute of Technology, Geological and Planetary Sciences, Pasadena, CA, United States
Exploring the upper mantle ‘redox geodynamics’ at subduction zones (Invited) (1948056)
Antoine Benard1, Alan B Woodland2, Kevin Klimm2, Nathalie Bolfan-Casanova1, Julien Monteux1, Jessy Dominique1 and Muriel Laubier1, (1)Université Clermont Auvergne, Laboratoire Magmas et Volcans, Clermont-Ferrand, France, (2)Univ Frankfurt, Frankfurt, Germany
Partial Melting of Hydrous Carbonated Pyroxenite at 3 GPa: Implication for Genesis of Primitive Arc Magmas (1964065)
Dr. Sujoy Ghosh, PhD1, Mr. Jitendra Kumar Dash1, Sagnik Sarkar1 and Dwijesh Ray2, (1)Indian Institute of Technology Kharagpur, Geology and Geophysics, Kharagpur, India, (2)Physical Research Laboratory, Planetary Sciences Division, Ahmedabad, India
