Multimechanism friction constitutive model for ultrafine quartz gouge at hypocentral conditions Academic Article uri icon

abstract

  • Occurrence of instability in crustal faults depends in part on the small-magnitude dependence of frictional strength on slip rate and slip history. Several lines of evidence suggest solution-precipitation processes in fault zones may be activated during interseismic periods when slip rates are small and may contribute to fault healing. A constitutive model for faulting at hypocentral conditions is presented that is capable of describing the variation in frictional properties as different slip mechanisms are activated in response to changes in temperature or slip rate. The model is used to analyze triaxial friction experiments on ultrafine-grained quartz gouge at temperatures to 600C, effective confining pressure of 150 MPa, and water-saturated or room-dry conditions. This model describes the frictional behaviour within each regime and across the transition between regimes. -from Authors

published proceedings

  • Journal of Geophysical Research: Solid Earth

author list (cited authors)

  • Chester, F. M., & Higgs, N. G.

publication date

  • January 1, 1992 11:11 AM