Fig. 1
From: Can clay minerals account for the behavior of non-asperity on the subducting plate interface?
Experimental results for illite, saponite, chlorite, and quartz under dry (a) and wet conditions using distilled pure water (b), showing friction coefficient as a function of shear displacement. The friction coefficient differs systematically between minerals, and clay minerals show a significant reduction of friction coefficients under wet condition. Slide-hold-slide tests were performed after reaching a steady-state friction at ~10Â mm displacement