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.

The abstract submission deadline is 8 August 2012: http://agu-fm12.abstractcentral.com/

Conveners:

Vincenzo Stagno (Carnegie Institution of Washington): vstagno@ciw.edu

Carmen Sanchez Valle (ETH): carmen.sanchez@erdw.ethz.ch

Dionysios Foustoukos (Carnegie Institution of Washington): dfoustoukos@ciw.edu