A set of metamorphic suites, previously known as the Precambrian metamorphi
c basement in Kuda, western Kunlun has been determined as a large nappe duc
tile shear zone which develops penetrative foliation, oriented stretching l
ineation, various but consistent kinematic indicators of thrusting from nor
th to south. The microstructure and the supermicrostructure also display th
e ductile deformation characteristics, and the paleotectonic differential s
tress is obtained, The metamorphic age is 426-451 Ma dated by Ar-40/Ar-39 m
ethod, According to tectonic background, it is a product of early Paleozoic
accretionary wedge orogenesis in western Kunlun.