Tectonic evolution in South America

• Grant number: 92/03467-9
• Support Opportunities: Research Projects - Thematic Grants
• Start date: April 01, 1993
• End date: August 31, 1996
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Umberto Giuseppe Cordani
• Grantee: Umberto Giuseppe Cordani
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant(s): 96/02074-4 - 1) the early geologic history of the south american continent. 2) the deposition of the bambui group within the context of the regional geotectonic evolution., AR.EXT; 96/03854-3 - The continental rift system of Southeast Brazil and the Cabo Frio poços tectono magmatic lineament, AR.EXT

Abstract

Isotopic methodologies recently implanted in the Center for Geo-chronological Research in the University of São Paulo (U-Pb. Sm-Nd; Pb-Pb), will enable when analyzed in conjunction with Rb-Sr and K-Ar data, a great advance in the understanding of the geotectonic evolution of South America. For this reason the research proposed here is geared to regions considered 'key' within the geological scenario of South America. They involve huge domains in Brazilian territory, as well as the Pampean Mountains and the Famatiniana Range in the north of Argentina. We believe that this radiometric study, geared to an isotopic geochemistry of these domains will be characterized as a step of huge importance to the Geology of the South American Platform as well as its relationship with the Andean range. (AU)