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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The role of intracontinental deformation in supercontinent assembly: insights from the Ribeira Belt, Southeastern Brazil (Neoproterozoic West Gondwana)

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Author(s):
Meira, Vinicius T. [1] ; Garcia-Casco, Antonio [2, 3] ; Juliani, Caetano [4] ; Almeida, Renato P. [4] ; Schorscher, Johann Hans D. [5]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Geociencias, Programa Posgrad Geoquim & Geotecton, BR-05508080 Sao Paulo - Brazil
[2] Univ Granada, Fac Ciencias, Dept Mineral & Petrol, Granada - Spain
[3] Univ Granada, CSIC, Inst Andaluz Ciencias Tierra, Granada - Spain
[4] Univ Sao Paulo, Inst Geociencias, Dept Geol Sedimentar & Ambiental, BR-05508080 Sao Paulo - Brazil
[5] Univ Sao Paulo, Inst Geociencias, Dept Mineral & Geotecton, BR-05508080 Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: TERRA NOVA; v. 27, n. 3, p. 206-217, JUN 2015.
Web of Science Citations: 28
Abstract

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. (AU)

FAPESP's process: 12/15462-7 - Neoproterozoic orogenesis on São Roque / Serra do Itaberaba, Embu and Costeiro domains and the crustal and tectonic evolution of the southeastern São Paulo State
Grantee:Caetano Juliani
Support type: Regular Research Grants