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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

Texto completo
Autor(es):
Meira, Vinicius T. [1] ; Garcia-Casco, Antonio [2, 3] ; Juliani, Caetano [4] ; Almeida, Renato P. [4] ; Schorscher, Johann Hans D. [5]
Número total de Autores: 5
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: TERRA NOVA; v. 27, n. 3, p. 206-217, JUN 2015.
Citações Web of Science: 28
Resumo

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)

Processo FAPESP: 12/15462-7 - As orogenias neoproterozóicas nos domínios São Roque / Serra do Itaberaba, Embu e Costeiro e a evolução crustal e tectônica do Sudeste do estado de São Paulo
Beneficiário:Caetano Juliani
Linha de fomento: Auxílio à Pesquisa - Regular