Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5780422 | Journal of South American Earth Sciences | 2017 | 46 Pages |
Abstract
In previous studies the mafic-ultramafic rocks have been considered to be Cambrian to Ordovician. Here we present a Sm-Nd whole rock isochron which shows that the formation age of these intrusions is 1002 ± 150 Ma and that the protolith age of the Pringles Metamorphic Complex metasedimentary rocks is 1289 ± 97 Ma. Our study also indicates that the San Luis mafic-ultramafic layered intrusives most probably formed in a back-arc tectonic setting, from an enriched sub-continental mantle, influenced by a subducting slab and/or crust injection into the Pampia Terrane prior to its collision with the Rio de la Plata Craton.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth and Planetary Sciences (General)
Authors
Gabriela Ferracutti, Ernesto Bjerg, Christoph Hauzenberger, Aberra Mogessie, Francisco Cacace, LucÃa Asiain,