Эволюция газопроницаемости катаклазита и разломной впадины при трехосном сжатии и влияние на изменения структуры проницаемости зоны разлома в течение цикла землетрясений

We report the results of permeability measurements of fault gouge and tonalitic cataclasite from the fault zone of the Median Tectonic Line, Ohshika, central Japan, carried out during triaxial compression tests. The experiments revealed marked effects of deformation on the permeability of the specimens. Permeability of fault gouge decreases rapidly by about two orders of magnitude during initial loading and continues to decrease slowly during further inelastic deformation.