The samples were crushed in a jaw crusher. The weathered surfaces were removed, and then, the rock samples were powdered using a tungsten carbide mill to the size of <200 mesh. ... Mineralogically, the mylonite is composed of quartz 30 %, plagioclase 16 %, microcline/perthite 17 %, biotite 1 %, sericite 15 %, clay minerals 20 %, and …Web