Influence of fluid pressure changes on the reactivation potential of pre-existing fractures: a case study in the Archaean metavolcanics of the Chitradurga region, India

Abstract The metavolcanics of Chitradurga region host numerous shallow crustal veins and fractures faults multiple orientations. Several high low P f cycles have been recorded in the region, leading to reactivation most pre-existing for selective some well-oriented under conditions. anisotropy (magnetic fabric) acted as prominent planar fabric fracture propagation vein emplacement both conditions, thereby attaining maximum thickness. In this study, we emphasize propensity these planes conditions fluid pressure variation, related cycles. Multiple fluid-induced make it difficult quantify maximum/minimum magnitudes. However, study use appropriate magnitudes mathematically feasible a depth ?2.4 km. We determine changes potential with states stress respective orientations Dependence variation on opening angle is also monitored. Finally, comment failure mode deformation behaviour within prevailing field inducing volumetric at time deformation. find that directly dip planes.