Journal
TERRA NOVA
Volume 27, Issue 3, Pages 206-217Publisher
WILEY
DOI: 10.1111/ter.12149
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Funding
- CAPES
- CNPq
- Sao Paulo Research Foundation (FAPESP) [2012/15462-7]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [12/15462-7] Funding Source: FAPESP
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In this study, we challenge the multiple collision model for the tectonic evolution of the Neoproterozoic Ribeira Belt in Southeastern Brazil. New U-Pb SHRIMP data reveal Palaeoproterozoic (2153 +/- 15Ma) and Cryogenian (783 +/- 6 and 768 +/- 8Ma) granitic rocks in the Embu Domain, and detrital zircon data of metasedimentary units from the Embu and Costeiro domains suggest a coherent tectonic evolution for the whole Ribeira Belt. Rather than by multiple collisions, these data are best explained by a simpler tectonic model involving continent (craton)-volcanic arc collisions in the Dom Feliciano and Brasilia belts that led to intracontinental crustal thickening of the adjacent thinned hinterland (Ribeira Belt) at similar to 640-610Ma, followed by widespread post-collisional magmatism and rift-related sedimentation at similar to 600-540Ma. We suggest that intracontinental orogeny is a relevant process during supercontinent assembly, as illustrated here by the evolution of significant parts of the Brasiliano orogen.
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