Clay quantification and Ar-Ar dating of synthetic and natural gouge: Application to the Miocene Sierra Mazatan detachment fault, Sonora, Mexico

摘要

Direct dating of brittle fault rocks has been predicated on the assumption that illite in fault gouge is a mixture of two populations of clays: one detrital, derived from the wall rock, and the other authigenic, forming in the brittle fault zone during fa