Fluid Drainage Leads to Thermal Decomposition of Wet Gouge During Experimental Seismic Slip
Thi Trinh Nguyen,
Li‐Wei Kuo,
Qing‐En Kong
et al.
Abstract:Several borehole cores intersecting faults related to coseismic slip display high‐temperature features, including thermal decomposition of fault gouge. We present evidence that these features may be related to fluid drainage of the slip zone during seismic slip. We sheared water‐saturated kaolinite powders under both fluid drained and undrained conditions, expected for seismic slip at shallow crustal depths. Our results show typical dynamic weakening behavior regardless of conditions. Under fluid drained condi… Show more
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