Controls on the oxidation potential of subducted slab-derived fluids

Magmas formed in arc settings tend to have a higher oxygen fugacity than those formed in different tectonic environments. The origin of this feature is highly disputed despite its importance in controlling ore-forming processes. My goal is to experimentally assess the capacity of slab-derived hydrous fluids to oxidize the mantle wedge, the source of arc magmas. My main focus is on the stability of sulfide and sulfate minerals in solutions of varied composition. I use the piston cylinder pressure apparatus and the entrapment of synthetic fluid inclusions to sample the experimentally produced supercritical fluids.