RT Journal Article
T1 Origen de circones detríticos ricos en Hf de São João del Rei, Minas Gerais (Brasil)
T1 Origin of detritic Hf-rich zircons from São João del Rei, Minas Gerais (Brasil)
A1 Sáez Ramos, Reinaldo
A1 Pereira, R. M.
A1 Carrasco, R.
A1 Nieto Liñán, José Miguel
AB Heavy concentrates obtained by pane sampling on several creeks near São João del Rei, Minas Gerais(Brasil) provide unusual Hf-rich zircons. Image and chemical analyses performed on these zircons by SEMand LA-ICP-MS show uncommon textural and compositional features. The core of zircons exhibits a complextexture including evidences of hydrothermal recrystallization. Here it is also conspicuous the abundanceof rare metal minerals as inclusions. The average content of HfO2 in the core is of about 12 weigh %. Therim of zircons shows different zoning features with HfO2 content up to 35 weigt %. An origin related withrare element pegmatites and further reworking by hydrothermal fluids is suggested as the more suitablescenario for these unusual zircons
PB Sociedad Geológica de España
YR 2004
FD 2004
LK http://hdl.handle.net/10272/8887
UL http://hdl.handle.net/10272/8887
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026