Volatiles (e.g., H2O, CO2, Cl, F, S) play a fundamental role in Earth’s dynamic systems and profoundly contribute to the well-being and sustainability of life, making our planet unique. This is largely because volatiles influence planetary scale processes, including those that connect Earth’s deep and surface systems, such as melting, mineral stability and element mass transfer. These global cycles involve an efficient transfer of volatiles from our planet’s surface to its interior via subduction zones, mobilization by melts and fluids, and eventually emission to the atmosphere via volcanism. Volatiles may also be stored in the mantle, and possibly be re-mobilized.
The investigation of volatiles in melts and fluids through novel and multi-disciplinary approaches continues to yield important insights into the inner workings of our planet. This session aims to gather contributions from scientists involved in the broad spectrum of volatile cycles, with a focus on the principal carriers of these elements: melts and fluids. We welcome contributions from the different fields of petrology and geochemistry, via investigations of natural samples and experimental studies.
We particularly invite contributions on: i) deep volatile cycles of H2O, CO2, halogens and S; ii) volatile mobilization and transfer during subduction in COHNS fluids and silicate melts; iii) volatiles in metasomatic processes; iv) volatile properties in fluids and melts ; v) volatile storage in the lithospheric mantle; vi) volatile emissions and storage in volcanic systems.