Large geographic and temporal extensions of the Rio de la Plata Craton, South America, and its metacratonic eastern margin

Joao O. S. Santos, Carlos J. Chernicoff, Eduardo O. Zappettini, Neal J. McNaughton, Leo A. Hartmann

Research output: Contribution to journalReview articlepeer-review

33 Citations (Scopus)

Abstract

Integration of existing isotopic and geological data allows a reconsideration of the distribution and age of the Rio de la Plata Craton within South America. The reinterpretation increases the area of the craton to about 2,400,000 km(2) with implications for the tectonic map of South America and for global reconstruction of palaeocontinents. Four areas previously considered as separate cratons (Luis Alves, Curitiba, Tebicuary, and Paranapanema) are interpreted as part of the same Rio de la Plata Craton. The craton is organized into six provinces and domains: Buenos Aires-Piedra Alta, Taquarembo, Tebicuary, Luis Alves, Encantadas, and Nico Perez. The term 'Transplatense' is proposed to replace 'Trans-Amazonian' for Rhyacian events that occurred within the Rio de la Plata Craton. The craton is formed not only by dominant Rhyacian rocks and local Archaean rocks, but also by Statherian and Mesoproterozoic rocks. The domains are all partially to totally covered by Phanerozoic basins (Parana, Chacoparanense, Claromeco, Salado, Balcarce, and Colorado) which makes their investigation difficult. The Ediacaran-Cambrian collisions of the Brasilian orogen generated tectonic mixtures of orogenic and cratonic zones. This is more evident in the eastern margin of the craton, which behaved as a metacraton.

Original languageEnglish
Pages (from-to)56-85
Number of pages30
JournalInternational Geology Review
Volume61
Issue number1
DOIs
Publication statusPublished - 2 Jan 2019

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