Differential Stress, Strain Rate, and Temperatures of Mylonitization in the Ruby Mountains, Nevada: Implications for the Rate and Duration of Uplift
Knowledge of the magnitude of the differential stress during the formation of mylonitic rocks provides constraints on mechanical and thermal models for the exhumation of the metamorphosed foot walls of major low-angle detachment faults. We have analyzed the differential flow stress during the mylonitization of quartzose rocks in the Ruby Mountains, Nevada, using grain-size piezometers and kinetic laws for grain growth. Quartzites from mylonitic shear zones in Lamoille Canyon and Secret Creek gorge have grain sizes of 91–151 μm and 42–64 μm, respectively. The peak temperature during mylonitization ...
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