10:45 AM - 11:00 AM
[SMP31-01] Tectonic development of the East Indian cratonic margin and its status in Columbia Supercontinent
Keywords:East Indian Craton margin, Mesoproterozoic Chhattisgarh Basin, Felsic volcanism, Columbia Supercontinent
Our group in recent years have carried out detailed sedimentological, geochemical, and geochronological studies of the early sediment fills of these Mesoproterozoic basins (Chakraborty et al., 2012, Precam. Res., 200-203, 129-148; Das et al., 2015, Geol. Soc. London, Memoirs, 43, 207–221; Saha et al., 2016, Precam. Res., 281, 363-383) In this presentation, the collated data on the paleo-environmental facies analysis, variation in Nd-isotope geochemistry and U-Pb detrital zircon geochronology will be presented for the sediments of Singhora Basin, Khariar Basin and Ampani Basin, and also the geochemical character with tectonic affinity of the ca. 1450 Ma felsic porcellanitic tuff layer in all these basins. This will help to have an integrated understanding of the evolution of deep- to shallow continental crust in the East Indian Craton margin, as well as the connection between its neighbors in the supercontinent, "Columbia".