The Nico Pérez terrane (Uruguay) and its archean and paleoproterozoic inheritance

A U-Pb SHRIMP zircon geochronological study was carried out in the Nico Pérez Terrane central-eastern portion of Uruguay with aim constraining its geological evolution and cratonic affinity. is made up by a mosaic tectonic blocks diferente lithologies sizes. This terrane limited to west Piedra Alta through Sarandí del Yí shear zone, east, contact Retamosa thrust Dom Feliciano Belt (Brasiliano orogenic cycle). Lithologically, composed medium high grade metamorphic rock contained three (Pavas, Valentines Rivera blocks) represented mainly granitoids, as well ortho parametamorphic rocks, such amphibolites, metapyroxenites, BIFs, schists, quartzites fuchsite, among others. Archean inheritance, Rhyacian, Statherian, Neoproterozoic magmatic ages are reported here. Similar ages, which show Archaean inheritance imprint, units modify idea that Río de La Plata Craton only corresponds juvenile Paleoproterozoic unit. This, together recently published geophysical information, supports affinity Craton.