RHEOMANTLE · Evaluation of mantle rheology in exhumed strike-slip faults

Crustal deformation, and associated seismic hazards, along active strike-slip faults are likely to be highly dependent on broad shear zones that occur within the uppermost mantle. The zones of localized mantle flow are physically continuous with crustal faults, and may control the bulk rheology of these systems. The main goal of this proposal is to characterize the rheological properties of naturally deformed mantle rocks and to provide insights into the control of mantle processes on deformation in lithospheric fault zones. We will utilize the mantle rocks exhumed in three major strike-slip fault shear zones (San Andreas Fault, US