Post-orogenic tectonic evolution of the suture zone between the North China Craton and South China Block: Insights from a petrostructural study of the Late Mesozoic granites, Jiaodong Peninsula, East China

Here we present the data of anisotropy of magnetic susceptibility (Table S1) and the plot diagram (Figure S1) for Late Mesozoic plutons submitted to Tectonics.Abstract of the study: The Late Mesozoic tectonics of East China is characterized by widespread magmatism, large-scale thrusting and folding, extensional dome structures, strike-slip faulting and block rotation. As a part of East China, the Sulu orogen is famous for its ultra-high pressure (UHP) metamorphism related to the Triassic continental deep subduction of South China Block (SCB) beneath the North China Craton (NCC), and the post-orogenic tectonics have reactivated major lithospheric structures of the Triassic orogen. Hence, the Late Mesozoic post-orogenic tectonic evolution is essential to understand the architecture of the UHP orogen and tectonic framework of East China. Polyphase deformations and magma emplacement have been recognized within the suture zone between NCC and SCB. Magnetic fabrics and Gravity modeling reveal the Late Jurassic plutons have concentric magnetic foliation pattern, NE–SW trending magnetic lineation, and NW–SE trending feeder zones at the depth. A significant D₁ event with a top-to-the-NE high-temperature shearing, coeval with the emplacement of the Late Jurassic plutons, is recognized. These results support a genetic link between the Late Jurassic pluton emplacement and regional NE–SW extensional tectonics. A compressional deformation (D₂) is related to the Late Jurassic to Early Cretaceous southeastward thrusting. A subsequent extensional D₃ event with age around 126 Ma is featured by rolling-hinge structure with a top-to-the-WNW ductile shearing, corresponding to the Early Cretaceous NW–SE extensional tectonics. These new data indicate that the post-UHP orogen experienced a complex Late Mesozoic tectonics evolution, and are considered in a geodynamic model of the North China Craton destruction.<br>