Zircon U-Pb dating and Hf isotope analysis on the Taihua Complex: Constraints on the formation and evolution of the Trans-North China Orogen

► The Xiaoqinling area was southernmost segment of the Trans-North China Orogen. ► Taihua Complex from Xiaoqinling area was formed within the Paleoproterozoic. ► Collision between W- & E-Blocks along TNCO occurred in the Paleoproterozoic. ► Xiaohe granite consist the late Archean crust and newly formed mantle materials. ► Primary magma of granite gneisses derived from the late Archean depleted mantle.