DCO Sessions at 2012 AGU Fall Meeting

2012-12-03 - 08:00 - 2012-12-07
San Francisco, CA (USA)


The Deep Carbon Observatory (DCO) will have a substantial presence at the 2012 Fall Meeting of the American Geophysical Union (AGU) in San Francisco on 3-7 December 2012.  DCO collaborators are organizing sessions relevant to all four DCO science directorates. For example, DCO Executive Committee member Robert Hazen is co-organizing a session with Patricia Dove on Co-Evolution of the Geosphere and Biosphere.  DCO Extreme Physics and Chemistry Co-Chairs Giulia Galli and Craig Manning are organizing a session with Abby Kavner on Physics and Chemistry of Deep Carbon. Invited speakers at their session include DCO collaborators Wendy Mao, Artem Ogenov, and Rajeep Dasgupta. DCO collaborator Dionysis Foustoukos is co-organizing sessions on Redox Controls on C-O-H Equilibria in the Earth’s Interior and Serpentinization and Dehydration as a Major Process for Deep Earth Elemental Cycling. DCO Executive Committee member Eiji Ohtani and DCO Reservoirs and Fluxes Scientific Steering Committee member Marc Hirschmann are invited speakers at a session on Volatiles in Earth’s Interior and their Effect on Physical Properties.  Additional details about these sessions are provided below. 

The deadline for submitting abstracts to these and other AGU sessions was 8 August 2012DCO will not hold another Town Hall Meeting at AGU this year, but representatives of the program will be present at DCO-related sessions. Small meetings associated with DCO may be organized in conjunction with the AGU conference.  

B016:  Co-Evolution of the Geosphere and Biosphere
Sponsor:  Biogeosciences
Co-Sponsor:  Volcanology, Geochemistry and Petrology
Convenors:  Patricia M. Dove (Virginia Tech) and Robert M. Hazen (Carnegie Institution of Washington)
Description: Research in the Earth sciences reveals striking correlations between geological events and the origin and evolution of life. Many aspects of Earth's major transitions, including changes in the oceans and atmosphere, shifts in tectonics, and biological innovations that include photosynthesis, eukaryotes, multicellularity, and the rise of skeletal biomineralization, appear to be interdependent. Efforts to interpret these interrelations are uncovering striking examples of the co-dependent geosphere and biosphere. This session will explore these co-dependences through 4 billion years of Earth history.

DI010:  Redox Controls and C-O-H Equilibria in the Earth's Interior
Sponsor:  Study of Earth's Deep Interior 
Co-Sponsors:  Mineral and Rock Physics and Volcanology, Geochemistry, and Petrology 
Convenors:  Vincenzo Stagno (Carnegie Institution of Washington), Carmen Sanchez Valle (ETH Zurich), and Dionysios Foustoukos (Carnegie Institution of Washington)
Description:  The oxygen fugacity in the Earth's interior is likely to be buffered by heterogeneous mineral equilibria in peridotite and eclogite assemblages. This will dramatically affect the composition of C-O-H fluids with consequences for chemical and physical properties of the mantle. This session aims to improve our understanding on the role of C-O-H fluids at high temperature and pressure concerning 1) redox and partial melting processes beneath mid ocean ridges, subduction zones and lithospheric mantle; 2) diamond formation and mineral dissolution; 3) phase equilibria in the C-O-H system and fluid/rock interactions and 4) physical and chemical properties of aqueous fluids. We encourage contributions from experimental petrology, rock and fluid geochemistry with particular interest for in situ analytical techniques, mineral physics and theoretical studies.

DIO15: Volatiles in Earth's Interior and their Effect on Physical Properties
Sponsor:  Study of Earth's Deep Interior
Co-Sponsors:  Mineral and Rock Physics and Volcanology, Geochemistry, and Petrology
Convenors:  Mark Kendrick (University of Melbourne),  Simon Turner (Macquarie University), Arianna Gleason (Stanford University), and Toru Inoue (Ehime University)
Invited Speakers:  Sujoy Mukhopadhyay (Harvard University), Marc Hirschmann (University of Minnesota), Jie Li (University of Michigan), and Eiji Ohtani (Tohoku University)
Description:  The exchange of volatiles, including CO2, H2O, halogens, S, N and noble gases between different reservoirs is a fundamental Earth system process. The capacity of minerals at high temperature and pressure to incorporate water, carbon, halogens and trace volatiles influences mantle solidus temperature, rheology and deep-recycling of surface volatiles into the mantle. We invite novel contributions from petrology, mineral physics (including measurements of elasticity, density, viscosity and electrical conductivity), seismology, trace element/isotope geochemistry and modelling that expand our understanding of volatiles in the mantle and core.

VO37:  Physics and Chemistry of Deep Carbon
Sponsor:  Volcanology, Geochemistry, and Petrology
Co-Sponsors:  Mineral and Rock Physics and Study of Earth's Deep Interior
Conveners:  Abby Kavner (UCLA), Giulia Galli (UC Davis), and Craig E Manning (UCLA)
Invited Speakers:  Wendy Mao, Mario Santoro, Artem Ogenov, and Rajeep Dasgupta
Understanding the terrestrial deep carbon cycle requires improved knowledge of the physical and chemical behavior of carbon at the extreme conditions found in Earth's interior. Novel studies are providing insights into carbon bearing materials at high pressure and temperature, such as polymerized CO2, Fe-C alloys, carbon in silicate and other magmas, and carbon solubility and transport in subduction-zone fluids. We invite contributions describing theoretical, experimental, and/or computational approaches aimed at describing and understanding the physics and chemistry of carbon in the deep Earth and other terrestrial planets.

V040: Serpentinization and Dehydration as Major Processes for Deep Earth Elemental Cycling
Sponsor:  Volcanology, Geochemistry, and Petrology
Co-Sponsors:  Mineral and Rock Physics, Ocean Sciences, Study of Earth's Deep Interior, and Tectonophysics 
Convenors:  Ivan Savon (University of Leeds) and Dionysis Foustoukos (Carnegie Institution of Washington)
Description:  Serpentinites form when water interacts with ultramafic domains. Serpentinites can host variety of trace elements and their formation is responsible for vast isotopic fractionations (H, O, B, Li, Cl, Sr, Nd, etc). Serpentinite dehydration by returning to the deep mantle via subduction or during plate collisions, should have important implications for the elemental cycling and for the stable and radiogenic isotope signatures of the deep earth as a whole. We seek contributions addressing these processes, and with emphasis on the in-situ and bulk rock trace element and isotope geochemistry, textural and mineralogical studies and lab experiments.

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