Dynamic Shear Stress Estimated
from Exhumed
Pseudotachylyte-bearing Faults
Personnel: A. Griffith, D. Pollard
Sponsor: Stanford Rock Fracture Project
Description: The purpose of this project is to assess how effectively models for steady-state frictional heating describe real faults. We are attempting to reconstruct the stress conditions for slip on exhumed pseudotachylyte-bearing faults by considering the energy balance governing the effects of frictional heating on the shear resistance within a fault zone (e.g. Lachenbruch, 1980). We are primarily concerned with establishing the minimum dynamic shear stress necessary to initiate frictional melting (under ambient temperature and pressure conditions) during small earthquakes.