An alternative to the fault-valve model

This paper proposes a mechanism called the mode-switching model that is presented as an alternative to fault-valve model. relevant open-flow, low-porosity, fluid-saturated systems deforming by pressure solution creep. As opposed most constitutive models discussed in geological literature, yield envelope capped at high normal stresses, demonstrated experimental studies. A low-permeability rock has relatively pore fluid for given input flux. increases dissolution rate quartz turn leads higher-permeability rock, low same flux and decreased solubility deposition, returning permeability. cycle continues indefinitely so long mass stressed, applied, operates. The drives Mohr stress circle tensile end of resulting crack-seal extensional veins. cap laminated veins rocks undergoing mineral reactions with large net volume losses coupled solute transfer. Failure results displacement discontinuities inclined angles σ1. Previously, these orientations have been taken represent reactivated faults, integral component process. In presented, surface prohibits system ever reaching super-lithostatic pressures. process effective stress-driven switching between ends arises from competition independent any seismic events, fault reactivation or episodic breaching impermeable seal. It provides unifying, self-consistent concept interpretation joints, faults hydrothermal systems.