S2: Water Rock Interaction (Special Session)

[S2-01] Permeability of the Earth’s Crust and Amount of Geofluids

*NORIYOSHI TSUCHIYA¹, Masaoki Uno¹, Fajah Febiani Amanda¹, Diana Mandaleva¹, Fumiko Higashino² (1. Tohoku Univ., 2. Okayama Univ. of Sci.)

Keywords:Diffusion, Permeability, Water Budget, Fluid Flow, Geofluid

Transport phenomena of geofluids in the Earth’s crust are controlled by both of diffusion equation (Fick’s second law), and Darcy’s law. In both cases, diffusion constant and permeability are key parameters to describe phenomena. We investigated transport phenomena of specific species in rock matrix around veinlets which were a supply source of external fluids, and then we evaluated diffusion constant and permeability of rock matrix under lower crustal environment. The total budget of geofluids were also evaluated.