In the Late-mesozoic granite of the Lower-Wulihe of Yujingshan Mountain a granitic mylonite zone, 1000m wide , is exposed . Feldspar phenocrist-relicts frequently show “6” and “8” shape , implying left laterlap rotation , and NNE-SSE trending left-lateral ductile shearing zone . In mylonite a set of densely developed extension tectonic schisetosity is clearly presented . On each schist plane the stress mineral quartz is concentrated , composing stretching lineation , which shows characteristics of ductile-brittle stretching structure. It is the main detachment fault of Lushan metamorphic core complex . The former is overprinted to the latter.