Sm-Nd Isotopic Constraints on the Neoproterozoic- Early Paleozoic evolution of the Eastern Sierras Pampeanas

LÓPEZ DE LUCHI, M.G.; STEENKEN, A.; MARTÍNEZ DOPICO, C.I.; DROBE, M.; WEMMER, K.; SIEGESMUND, S.

BOLLETTINO DI GEOFISICA TEORICA ED APPLICATA

ISTITUTO NAZIONALE DI OCEANOGRAFIA E DI GEOFISICA

Lugar: Trieste; Año: 2010 vol. 51 p. 31 - 33

0006-6729

The aim of this contribution is to present the result of an extensive integration of 276 already published Sm-Nd data of the Sierras de Córdoba, San Luis and Chepes in order to give an isotopical background for the crustal average age of the Eastern Sierras Pampeanas (ESP). ESP constitute a polyphase deformed morphotectonic unit, which was structured by three main events: the Ediacaran to early Cambrian (580–510 Ma) Pampean, the late Cambrian–Ordovician (500–440 Ma) Famatinian and the Devonian-Carboniferous (400–350 Ma) Achalian orogenic cycles.