V24A:
Deep Carbon: From the Mantle to the Surface and Back Again I

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Session ID#: 18009

Session Description:
The forms and fluxes of carbon in Earth determine its long-term fate on the planet. Carbon may be recycled to the surface through volcanism, relaminate the deep crust or sink into the mantle at subduction zones. Mantle-destined carbon may form diamonds or rise again as fluids and/or melts that feed volcanic systems. Quantifying carbon fluxes between these reservoirs is the subject of intense research, utilising field observations, experiments and numerical modelling. This research addresses fundamental questions: does carbon subduction affect surface abundances over geological time? Or is carbon returned efficiently to surface reservoirs via metamorphism, migration, magmatism and eruption? Is the net flux of carbon into or out of Earth and did the net flux change through time? This session brings together scientists studying carbon, its forms, quantities, movements and origins in the Earth system, from geochemistry to petrology, volcanology, geodynamics, thermodynamics, geophysics, paleoclimate and geology.
Primary Convener:  Terry A Plank, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States
Conveners:  Rajdeep Dasgupta, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States and Michael Richard Burton, University of Manchester, Manchester, M13, United Kingdom
Chairs:  Michael Richard Burton, University of Manchester, Manchester, M13, United Kingdom and Terry A Plank, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States
OSPA Liaison:  Terry A Plank, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States
Index Terms:

1012 Reactions and phase equilibria [GEOCHEMISTRY]
1025 Composition of the mantle [GEOCHEMISTRY]
1031 Subduction zone processes [GEOCHEMISTRY]
8430 Volcanic gases [VOLCANOLOGY]

Abstracts Submitted to this Session:

Geodynamics of melting in the Asthenosphere (Invited) (124202)
Fabrice Gaillard1, Guillaume C M Richard2, Malcolm Massuyeau3, Leila Hashim4, David Sifre3 and Pascal Tarits5, (1)ISTO, UMR 7327 Université d’Orléans-CNRS-BRGM, Orleans, France, (2)Université d'Orléans, OSUC / ISTO Institut des Sciences de la Terre d'Orléans, Orléans, France, (3)CNRS, Paris Cedex 16, France, (4)ISTO Institut des Sciences de la Terre d'Orléans, Orléans Cedex 2, France, (5)University of Western Brittany, Brest, France
Effects of Pressure and Temperature on the Kinetics of Iron-magnesite Redox Reaction: Implication for the Genesis of Ultradeep Diamonds (167411)
Feng Zhu, University of Michigan Ann Arbor, Department of Earth and Environmental Sciences, Ann Arbor, MI, United States, Jie Li, University of Michigan Ann Arbor, Department of Earth and Environmental Sciences, Ann Arbor, United States, Jiachao Liu, Michigan State University, Earth and Environmental Sciences, East Lansing, United States, Xiaojing Lai, China University of Geosciences, Wuhan, China, Bin Chen, University of Hawaii at Manoa, Honolulu, United States and Yue Meng, Carnegie Institution of Washington, HPCAT, Argonne, IL, United States
Carbonate melts in the hydrous upper mantle and their role in H2O controlled metasomatic mantle transformation (152183)
Daniel Weidendorfer, University of California Los Angeles, Los Angeles, CA, United States, Craig E Manning, University of California Los Angeles, Earth, Planetary and Space Sciences, Los Angeles, CA, United States and Max W Schmidt, ETH Zurich, Zurich, Switzerland
Melt focusing and CO2 extraction at mid-ocean ridges: simulations of reactive two-phase flow (128311)
Tobias Keller, University of Oxford, Oxford, United Kingdom, Richard F Katz, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom and Marc M Hirschmann, University of Minnesota Twin Cities, Department of Earth and Environmental Sciences, Minneapolis, United States
Thermodynamic Constraints on Carbonate Stability and Volatile Carbon Production in Subduction Zone Environments (197606)
Jennifer Shannon Gorce and Mark J Caddick, Virginia Tech, Blacksburg, VA, United States
Ins and outs of a complex subduction zone: C cycling along the Sunda margin, Indonesia (169237)
Brian M House, University of California Los Angeles, Los Angeles, CA, United States, Gray E Bebout, Lehigh University, Dept. Earth and Environmental Sciences, Bethlehem, PA, United States, David R Hilton, University of California San Diego, Earth Sciences, La Jolla, CA, United States and IODP Expedition 362 scientists
Extensive decarbonation of continuously hydrated subducting slabs (158037)
Fabio Arzilli, University of Manchester, Manchester, United Kingdom, Michael Richard Burton, University of Manchester, Manchester, M13, United Kingdom, Giuseppe La Spina, University of Manchester, SEES, Manchester, United Kingdom and Colin Macpherson, University of Durham, Department of Earth Sciences, Durham, United Kingdom
Stability of Aqueous Carbon Species in Subduction Zone Fluids (183890)
Meghan R Guild, Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States and Everett Shock, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States

See more of: Volcanology, Geochemistry and Petrology