Subduction zone devolatilization: petrology, fluid composition and flow, and tectonic implications (co-organized)
Co-Conveners: Taras Gerya , James Connolly , Catherine Chauvel 
Oral Programme
 / Wed, 05 May, 13:30–17:00  / Room 25
Poster Programme
 / Attendance Wed, 05 May, 17:30–19:00  / Hall XL

The session aims to gather contributions on the major processes and effects related to devolatilization and fluid escape from subducting slabs. Emphasis will be given to: (i) controls on the nature (fluid - melt - supercritical) and composition of fluids; (ii) the subduction zone cycle for volatiles and fluid mobilized elements; and (iii) mechanisms of fluid migration and mass transport.
An understanding of these processes is essential to the interpretation of slab and mantle wedge geochemistry and therefore ultimately determine our model of subduction tectonics.
We welcome contributions based on observations of natural high- and ultrahigh-pressure rocks and fluids and/or results from experimental and numerical modeling studies of relevant systems.