AGU 05 Session: From the Mantle to the Surface and Bac

This session will examine terrestrial volatiles (C, N, H2O, S, rare gases, and halogens) in the Earth's interior, including their characteristics in different mantle phases/reservoirs, their role during melting, and their cycling history to/from the exosphere. We invite contributions on topics ranging from: (1) Extraction of volatiles during mantle melting and the role of volatiles in basaltic magmatism and associated degassing at volcanoes. (2) Petrologic, mineralogic, and geochemical studies pertaining to cycling of volatiles in subduction zones and the return of volatiles to the crust and exosphere at convergent margins and/or delivery of volatiles to the deep mantle. (3) Storage of volatiles as trace constituents in principal mantle minerals and in minor phases such as diamonds, carbonates, fluids, grain boundaries, and other trace phases. We welcome contributions from geochemists, petrologists, mineral physicists, and geophysicists studying all aspects of deep Earth volatile cycles, including geochemical and geophysical studies of Earth materials, experimental investigations of chemical and physical properties of volatile-bearing phases, modeling studies ranging from theoretical mineral physics of volatiles in mantle phases to global volatile geochemical cycling, and constraints on volatile storage and cycling from observational geophysics.