The 40Ar/39Ar values of the mylonite series from the Tan-Lu fault belt demonstrate that the fault belt has experienced sinistral strike-slip movement in the Early Cretaceous. The large-scale strike-slip movement caused two types of strike-slip structures. One is sinistral ductile shear belts with low greenschist facies in metamorphic rocks. The other is brittle or brittle-ductile sinistral wrench faults in Mesozoic igneous and sedimentary rocks. These suggest that the strike-slip movement lasted from the earliest to the latest Early Cretaceous. The strike-slip movement triggered large-scale magmatism characterized by K-rich and intermediate rocks. Geochemical analyses of the igneous rocks show that the rocks contain both crust-derived and mantle-derived information. It is proposed therefore that the magmatism occurred in the conditions of faulting depression and crust-mantle in-teraction and that the fault cut into crust-mantle boundary during the strike-slip period. In addition to the Early Cretaceous pull-apart basin in the Laiyang basin, a strike-slip flexural basin with deposition of the Lower Creta-ceous Zhuxiang Formation was developed in the east of the Hefei Basin during strike-slip movement of the fault belt. The structures, magmatism and sedimentation of the Tan-Lu fault belt during its Early Cretaceous strike-slip movement are caused by high-speed, oblique subduction of the Izawa Nosaki plate in West Pacific, and are parts of the circum-Pacific tectonics.