The West Kongur Detachment (WKD) is located in the w estern margin of the Kongur gneiss dome in northeast Pamir. Based on the detailed field investigation, microstructure observation, quartz EBSD testing and zircon U-Pb dating, this study analyzed the geometry, kinematics and evolution time of the WKD. The presence of garnet, sillimanite and kynite in the mylonites from the WKD indicates that the shear zone moved from mid-lower crust to the surface. S/C fabric, rotating porphyroclasts and asymmetric folds in the WKD indicate the characteristic of W- or SW-dipping shearing movement of the hanging wall of the shearing zone. High-grade metamorphic mylonites and leucosomes records the zircon 206U-238Pb age of 20 Ma, suggesting that the WKD initially formed at early Miocene. Combined with previous studies, it can be concluded that the WKD should be the northernmost segment of Cenozoic Pamir mid-lower crust. Due to the fact that the Indian plate continued to northward thrusting after the Cenozoic Indian-Asian collision and this led to thickening of the Pamir crust from south to north, prograde metamorphism firstly occurred in south Pamir in the Eocene, and reached northern Pamir ~20 Ma later. The exhumation of Mid-Lower crust materials in northeastern Pamir started in middle Miocene. It was not until 6~4 Ma when the Kongur region started to uplift rapidly and the Cenozoic metamorphic rocks exhumed quickly.