Abstract
Deformation mechanisms of fault rocks in fracture zones are affected by ambient temperature, fluid pressure, confining pressure, and strain rate in the upper crust. The fracture zones recorded the deformation environment where they formed. Therefore, the fabrics of fault rocks in fracture zone are useful for determining the tectonic history, paleoseismic events and displacement sense of active faults. In this study, we give some examples of fault rock fabrics in trench and fault outcrops in the active fault zones of the Gosukebashi and Mitoge faults in central Japan to show the analysis method of fault rock fabrics in fracture zones and to point out some problems in active fault study and engineering geology.
