Paleoproterozoic source contributions to the São Roque Group sedimentation: LA-MC-ICPMS U-Pb dating and Sm-Nd systematics of clasts from metaconglomerates of the Boturuna Formation - Henrique-Pinto, R.; Janasi, Valdecir de Assis; Simonetti, Antonio; Tassinari, Colombo Celso Gaeta; Heaman, Larry M (Geologia USP. Série Científica, 2012)