Micromechanical Controls on Frictional Strength and Slip Instability in Mixed-Mineral Fault Gouge: Insights from Discrete Element Simulations

We performed discrete element simulations to investigate how weak-phase fraction, particle-size ratio, and interphase friction coefficient influence the frictional behavior and stick-slip dynamics of mixed fault gouge. In this dataset, we provide the numerical data corresponding to the figures in the manuscript, including shear strain-macroscopic friction coefficient curves, average friction coefficients during the steady-sliding stage, maximum friction drops, and related parameters used to characterize frictional weakening.