Fault-zone reactivation: kinematics and mechanisms

Abstract
The kinematics and mechanisms of fault-zone reactivation are reviewed. Reactivation is dependent upon fault-zone orientation and the existence of weak mylonites along these zones. The recognition of reactivation within mylonite zones, and the softening processes that first concentrate deformation into these and secondly provide a weak medium for reactivation are discussed. Attention is given to the Darling Mobile Zone, Western Australia and the Redbank Zone (see Obee & White, this symposium) as examples of reactivated zones.