Aglutination of a neoproterozoic proto-continent during the western Gondwana collage: tectonic setting of the southern Brasilia orogen - Campos Neto, Mario da Costa; Basei, Miguel Angelo Stipp; Janasi, Valdecir de Assis; Moraes, Renato de; Garcia, M. G. M.; Siga Júnior, Oswaldo (Simpósio 45 anos de Geocronologia no Brasil: CPGEO 1964-2009, 2009)