摘要
Based on the detailed field works and structural analysis, the authors found that the Keluo complex have been suffered a large scale extensional sliding and formed a detachment structure with top to southeast. According to the feldspar-quartz micro-texture analysis, the authors inferred that the deformation temperature of the extensional sliding is about 300 to 450 ℃. The 40Ar/39Ar measurement of biotite from the granitic gneiss samples yield the plateau ages of 118.39 to 117.37 Ma, these ages indicate that the deformation time of the extensional sliding zone is in the late Early Cretaceous period.