P19. Advances in geochemical tools for tracing fluid sources and timescales of fluid production and transport in the Earth's crust

Fluids play a critical role in the geochemical evolution of the crust, and fluid flow is the dominant process associated with mass and energy transport throughout Earth's crust and upper mantle. Crustal fluids are multicomponent systems. Furthermore, each constituent can be supplied by multiple sources, such as magma and upper mantle degassing, metamorphic devolatilization of sedimentary rocks, fluid-rock interaction, thermal degradation of organic matter, microbial activity, and meteoric and seawater infiltration. Crustal fluids actively circulating in the crust can preserve and transfer towards the surface important information about the state and evolution of natural systems. The ability to distinguish between different fluid sources and to define the timescales of fluid production and transfer is essential in several aspects of the earth sciences (e.g., understanding of the global volatile cycles, surveillance of active volcanoes and exploration of natural resources). This session welcomes contributions that highlight the importance, recent advances, applications, and limitations of geochemical tools as tracers of the origin and transport of fluids in the Earth's crust using data from natural case studies, laboratory experiments, theoretical calculations, geochemical models (e.g., equilibrium reaction path modelling, reactive transport modelling), and integrated approaches. Furthermore, contributions presenting methodological and technological developments are also welcomed.

fluid, crust, volatile cycles, geochemistry, degassing, devolatilization, fluid-rock interaction, timescales, fluid origin and transport, modelling, theoretical calculations, laboratory experiments, methodological and technological developments