Effects of fluid-flow on the strength of gouge-filled fault zones: liquefaction and dilatant hardening Academic Article uri icon


  • Abstract Slip within natural groundwater-saturated fault zones often occurs within a layer of unconsolidated granular fault gouge. The strength and sliding stability of such a fault will be determined by friction on grain surfaces, the geometry of the network of grain contacts, and the effective confining stress (confining stress minus fluid pressure) that creates this force network. Since shear in granular materials is always accompanied by dilation and compaction, local pore fluid pressure perturbations are created in shearing regions that …

publication date

  • December 1, 2013