Provenance signatures and tectonic setting for the Neo-proterozoic Seridó and Lavras da Mangabeira metavolcano-sedimentary belts (Borborema Province, NE Brazil) - Hollanda, Maria Helena Bezerra Maia de; Archanjo, Carlos José; Rico Bautista, John Mauricio; Souza, Laécio Cunha de (South American Symposium on Isotope Geology, 2012)