Trace element composition of parental magmas from mafic–ultramafic cumulates determined by in situ mineral analyses: the Juquiá mafic–ultramafic alkaline–carbonatite massif, SE Brazil - Azzone, Rogério Guitarrari; Enrich Rojas, Gaston Eduardo; Gomes, Celso B.; Ruberti, Excelso (Journal of South American Earth Sciences, 2013)