Fluid transfer in subduction zones

Fluids play a crucial role in subduction zone processes and during continental collisions. As such subduction zones are the key location linking the surficial and internal geochemical reservoirs. During metamorphic dehydration reactions fluids escape from the downgoing slab into the overlying mantle wedge affecting the rheology of the slab-mantle interface and controlling many geochemical cycles, magmatic processes, and earthquakes.