Isotopic clues tracking the open-system evolution of the Ponte Nova mafic-ultramafic alkaline massif, SE Brazil: The contribution of Pb isotopes - Azzone, Rogério Guitarrari; Chmyz, Luanna; Guarino, Vincenza; Alves, Adriana; Gomes, Celso B.; Ruberti, Excelso (Geochemistry, 2020)