On the realibility of Sr isotope chemostratigraphy of late Ediacaran carbonates from the Bambuí Group - Guacaneme, Cristian; Babinski, Marly; Paula-Santos, Gustavo; Caetano-Filho, Sergio; Bedoya-Rueda, Carolina; Trindade, Ricardo Ivan Ferreira da (Goldschmidt Conference, 2018)