Three dimensional strain distribution and deformation temperature interpreted from quartz microstructures and petrofabrics in the Okanagan Valley shear zone, southern Canadian Cordillera

The Eocene Okanagan Valley shear zone (OVsz) is a ~1-1.5 km thick, 650 ° down the exposed structural section. The observed telescoping of isotherms in the immediate footwall of the OVsz is interpreted to be the result of detachment-parallel penetrative general shear flow in predominantly plane strain deformation during progressive exhumation. This thesis discusses the possible processes that could have been responsible for this intense compression of isotherms in the immediate footwall of the OVsz.