The Hehuaping tin-polymetallic deposit is a large deposit newly discovered in southern Hunan Province. The data obtained suggest that the ore-forming fluid was a mixed solution of meteoric water, mantle fluid and crustal fluid. Basic igneous materials (between 224 Ma to 205 Ma) in southern Hunan and mantle fluids were involved in the early metallogenic process (224 Ma), suggesting that the Mesozoic tectonic regime transformation in Nanling region possibly took place in late Triassic (224 Ma±).oft-com:office:office" />