SHRIMP U-Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil - Leal, Luiz Rogerio Bastos; Cunha, José C.; Cordani, Umberto G.; Teixeira, Wilson; Nutman, Allen; Leal, Ângela Menezes; Macambira, Moacir José Buenano (Journal of South American Earth Sciences, 2003)