Microscale strain partitioning? Differential quartz crystallographic fabric development in Phyllite, Hindu Kush, Northwestern Pakistan

Abstract

Spatially referenced quartz c axis fabrics demonstrate the preservation of multiple, distinct fabrics in a specimen collected from northwestern Pakistan. The overall fabric yielded by the specimen is dominated by a single population of quartz grains, while the fabric signatures of two other unique, spatially distinct populations are overwhelmed. It is these minor fabrics, however, that provide information on temperature of deformation (403 ± 50°C), differential stress (8.6 + 2.6/-1.5 MPa to 15.0 +3.8/-2.5 MPa), strain rate (10-16 s-1 to 10-15 s-1), and strain partitioning recorded by the specimen.