Metamorphic and igneous and petrology, field studies, and isotope geochemistry are the major tools employed to enhance our understanding of fluid-mediated processes in the deep Earth. Our focus thereby is on the recycling of surface-equilibrated aqueous fluids, hydrous melts, or supercritical liquids at subduction zones and their impact on element mobilities within the subduction cycle. A strong field and collaborative experimental emphasis is put on the chemical characterization of the mobile phases through the analysis of minerals and their fluid and melt inclusions, from both high-P metamorphic and arc magmatic rocks and of experimental run products including cryogenic diamond trap measurements from high-P experiments.
