A New Method for Determining Fluid Flux at High Pressures Applied to the Dehydration of Serpentinites

A new method to determine fluid flux at high pressures and temperatures has been developed used study serpentinites subduction zone conditions. Drill cores of a natural antigorite-serpentinite with strong foliation were in multi-anvil experiments the range 2–5 GPa 450–800°C. Fluids released upon dehydration are fixed by formation brucite an adjacent sink. The amount distribution serves as proxy for flow. In our specific setup sample reacted surrounding sink form additional layer olivine, which potential limit within experiments. For conditions prior serpentine we Al(OH)3 source. Fluid this experiment did not migrate through serpentinite, indicating that low diffusivity. also show small deviatoric stresses have influence on can cause anisotropic flux. Comparison between time scales determined production rates indicates pressure buildup during reactions. Adjacent less permeable layers inhibit even when interconnected pore space formed.