Casquet, CesarPankhurst, Robert JRapela, Carlos WGalindo, CarmenDahlquist, Juan A.Baldo, EdgardoSaavedra, JGonzalez-Casado, Jose MFanning, Christopher2015-12-132015-12-130016-7649http://hdl.handle.net/1885/80298We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U-Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 Ma for igKeywords: anorthosite; pluton; Proterozoic; Rodinia; Argentina; Sierras Pampeanas; South America; Western Hemisphere; World Anorthosites; Argentina; Neoproterozoic; Rodinia; SHRIMP data; Sierras Pampeanas200410.1144/0016-764904-1002015-12-11