Low-temperature deformation mechanisms at a lithotectonic interface near the Sudbury Basin, Eastern Penokean Orogen, Canada

Southwest of the Sudbury Basin, variations in macroscopic strain, microstructure and deformation mechanisms within Archaean granitoid basement and overlying Proterozoic rocks suggest that rock strength was strongly influenced by large amounts of fluids. Ductilely deformed granitoids with strong shape fabrics are concentrated in a 150–200-m-wide zone parallel to the subvertical basement-cover interface. High fluid activity in this zone is …