Chemical and isotopic relationships between peridotite xenoliths and mafic-ultrapotassic rocks from Southern Brazil - Carlson, Richard W.; Araujo, Ana Lucia N.; Junqueira-Brod, Tereza C.; Gaspar, José Carlos; Brod, José Afonso; Petrinovic, Ivan A.; Hollanda, Maria Helena Bezerra Maia de; Pimentel, Márcio Martins; Sichel, Suzanna (Chemical Geology, 2007)