Proterozoic Fe-Cu metallogeny and supercontinental cycles of the southwestern Yangtze Block, southern China and northern Vietnam

The mineralization styles of the 1.66 Ga deposits in the southwestern Yangtze Block are similar to those of contemporaneous IOCG deposits in other blocks within the Columbia supercontinent, including those in the Leichhardt and Calvert Superbasins, the Mount Isa Inlier, Australia, and those in the Khetri copper belt, NW India. Together with similar hosting strata and associated igneous rocks, the occurrence of these deposits leads us to propose that these blocks were adjacent to each other in the reconstructed Columbia supercontinent. Both South China and India remained together during the assembly of the supercontinent Rodinia and have undergone extensive Neoproterozoic magmatism that overprinted the Fe-Cu deposits.