Enhanced terrestrial input into Paleoproterozoic to Mesoproterozoic carbonates in the southwestern South China Block during the fragmentation of the Columbia supercontinent

Bulk rock elemental, C, O and Sr isotopic data for carbonates of the Palaeoproterozoic to Mesoproterozoic Luoxue and Luzhijiang formations from the southwestern margin of the South China Block are studied to infer aspects of the provenance and depositional environment. Elemental tracers demonstrate that the upper Luoxue and Luzhijiang carbonates were not significantly affected by crustal contamination and diagenetic/metamorphic overprinting,...