Estimation of paleo-permeability around a seismogenic fault based on permeability tensor from observable geometric information of quartz veins

Abstract The mineral veins formed by filling tensile cracks record the accumulation of past hydraulic activities such as fluid migration in damage zones a fault. purpose this study is to estimate flow behavior around thrust faults using three-dimensional permeability tensor from geometric information veins. Here, estimated represents paleo-permeability when were open fractures. We attempted zone Nobeoka Thrust fault applying Oda’s theory, determined observed outcrop. In addition, situ data acquisition and analytic techniques developed tensor, we Thrust. As result, could be outcrop, which helped clarify fluids Our results show that anisotropy value changed with distance core on footwall; particular, maximum increased core. direction shows footwall migrated toward plane or hanging wall immediately after earthquake. Graphical