PROVENANCE INSIGHTS OF THE SILURIAN-DEVONIAN RIO SECO DE LOS CASTAÑOS UNIT, SAN RAFAEL BLOCK, MENDOZA: U-PB ZIRCON AGES

CINGOLANI CARLOS A.1-2, MANASSERO MARCELO J.1, URIZ NORBERTO J.2, BASEI MIGUEL A.S

Congreso; Congreso Geológico Argentino Cba; 2014

Both studied RSC samples show dominant source from Pampean and Famatinian cycles. The U-Pb data show that the detritus coming from the Mesoproterozoic basement are scarce. With these isotopic data the maximum sedimentation age of the unit is constrained to the Lower Silurian. In this sense it is a great difference with the Villavicencio unit in Uspallata-Caracoles region (Cingolani et al., 2013) with dominant source from the Mesoproterozoic rocks.