ACTIVITIES OF FAULTS AS DETERMINED FROM THE MICROSTRUCTURAL FEATURES OF THE CLAY GOUGE

Fault gouges rich in clay minerals are widely found in natural faults. The history of the activity of a fault is often recorded in the soft and easily deformed fault gouges. In the paper, a modeling of the stick-slip and creep-slip of faults with natural fault gouges is made.The nicrostructural features so produced is compared with those of natural fault gouges. An integrated analysis with the macro-seismogelogic data suggests a definite relationship between the microstructural features of fault gouges and the stick-slip or creep-slip of faults.