Paleo - position of the South China Craton in the Rodinia Supercontinent: Evidence from the U - Pb age and Hf isotope of detrital zircon from the Nam Co Complex

To constrain the paleo - positions of South China Cratons in Rodinia Supercontinent during Neoproterozoic, situ U Pb dating, and Hf isotope analysis detrital zircon from Nam Co Complex, Song Ma Suture zone, northwestern Vietnam was performed. The isotopic dating on zircons shows that Complex demonstrates major population (>50%) around ~850 while minor is scattered between ~1.2÷3.0 Ga. Neoproterozoic age spectrum exhibits a large range εHf(t) strongly negative to positive values ( 17.418022÷ 14.600527), indicating source magma for this has been not only derived reworking Archean basement rocks, but also generated juvenile material. distribution patterns data are compatible with those Craton rather than Indochina Craton. indicate sedimentary protoliths were deposited convergent related basin along southwestern margin Neoproterozoic. Combined similarities western Cathaysia, Indochina, East Antarctica India, it proved situated at close proximity India.