The volatile budget and distribution in a terrestrial planet is crucial for its post accretional evolution. For instance, the water content strongly affects the melt viscosity and as a consequence the mode of mantle convection responsible for heat transport and planetary cooling. In recent years, it has been increasingly recognized that the mantle is to date an important reservoir of volatiles with recycling occurring even into deep mantle regions. The volatile distribution in the mantle, the mechanisms and the efficiency of volatile recycling into the mantle and the efficiency of degassing are, however, only poorly understood. This sessions welcomes contributions from experimental, natural and modeling studies and aims to combine geochemical, mineralogical and petrological approaches to increase our understanding of todays Earth’s mantle volatile cycles and their evolution over Earth’s history.

Solicited presentations: Pierre Cartigny (IPGP, France), Christof Kusebauch (GFZ, Germany)

This session is co-organised with the European Association of Geochemistry