C and Sr isotope variations and paleoceanographic changes as recorded in the late neoproterozoic Araras carbonate platform, Amazon craton, Brazil - Nogueira, Afonso César Rodrigues; Riccomini, Claudio; Sial, Alcides Nobrega; Moura, Cândido Augusto Veloso; Trindade, Ricardo Ivan Ferreira da (South American Symposium on Isotope Geology, 2003)