Fission track and U-Pb double dating of detrital zircon applied to the intracratonic Mesozoic Bauru Basin, Brazil

Autor(es)

Dias, A. N. C. ^[1] ; Chemale Jr, F. ; Hackspacher, P. C. ^[2] ; Soares, C. J. ^[3] ; O-Aristizabal, I, C. ; Tello, C. A. S. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Fis Quim & Matemat, CCTS, Campus Sorocaba, Rodovia Joao Leme dos Santos, Sorocaba, SP - Brazil

^[2] UNESP, Inst Geociencias & Ciencias Exatas, Rio Claro, SP - Brazil

^[3] ChronusCamp Res Thermochronol Lab, Itapira, SP - Brazil

^[4] FCT, Dept Fis, UNESP Campus Presidente Prudente, Presidente Prudente, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: GEOLOGICAL JOURNAL; v. 53, n. 5, p. 1767-1780, SEP-OCT 2018.
• Citações Web of Science: 1

Resumo

Coupled fission-track and U-Pb analyses of detrital zircons are presented. A Cretaceous intracratonic basin formed between 93 to 60Ma, the Bauru Basin, is investigated to distinguish its provenance and information about the main orogenetic events of the South American Platform. The results of U-Pb zircon dating suggest that Rhyacian (Transamazonian Cycle, 2.3-2.05Ga), Statherian (1.8-1Ga), Sunsas (1.2-0.9Ga), Tonian (Early Brasiliano, 1 to 0.85Ga) and Brasiliano (0.65 to 0.50Ga) terranes and units are the main source areas. The fission-track data provide important evidence of cooling during the Early Brasiliano and Brasiliano periods and yields 2 main Paleozoic age populations, one between 500 and 360Ma and the other between 345 and 230Ma. These populations were interpreted as resulting from different tectonic events along the western margin of the South American Platform that affected the platform's internal composition by uplift and exhumation. (AU)

• Processo FAPESP: 14/13792-5 - Estudo da evolução de bacias sedimentares brasileiras a partir da termocronologia por traços de fissão em zircão
• Beneficiário: Airton Natanael Coelho Dias
• Linha de fomento: Auxílio à Pesquisa - Regular