| Texto completo | |
| Autor(es): |
Cacador Martins-Ferreira, Marco Antonio
[1]
;
Coelho Dias, Airton Natanael
[2]
;
Chemale, Jr., Farid
[3]
;
Guimaraes Campos, Jose Eloi
[4]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Fed Goias, Fac Ciencias & Tecnol, BR-74968755 Ap De Goiania, Go - Brazil
[2] Univ Fed Sao Carlos, Dept Fis Quim & Matemat, BR-18052780 Sorocaba, SP - Brazil
[3] Univ Vale Rio dos Sinos, Programa Posgrad Geol, BR-93022000 Sao Leopoldo, RS - Brazil
[4] Univ Brasilia, Inst Geociencias, BR-70910900 Brasilia, DF - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Arabian Journal of Geosciences; v. 13, n. 17 SEP 1 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
Fission-track analysis in zircon and apatite detrital grains from Mesoproterozoic sedimentary sequences show evidence of cooling episodes in central Brazil from Neoproterozoic to Cenozoic. Apatite fission-track ages reveal a main cooling episode during the Late Cretaceous-Early Paleogene, providing important clues on cooling by uplift and denudation during drifting of South America and Africa. Zircon data also suggest 3 distinct cooling events: (i) a Neoproterozoic-Cambrian event, probably related to orogenic exhumation of the Brasilia Belt and the thermal decay of West Gondwana assembly, (ii) a Devonian-Carboniferous event, probably related to the Late Famatinian orogeny and early stages of the Gondwanide orogeny, and (iii) an Early Permian to Triassic event, linked to the Late Gondwanide orogeny. These results indicate that the processes of assembly and breakup of supercontinents might significantly affect the plate interior, especially along with ancient orogenic belts. Zircon data has shown evidence of thermal decay during and after the West Gondwana assembly. Apatite data, on the other hand, has shown evidence of thermal decay during and after the breakup of Pangaea. The processes of assembly as well as the breakup of supercontinents can be tracked in the intracratonic setting, especially along with ancient orogenic belts. These assumptions take us back to the old concept of ``mobile belts{''} as old orogenic regions that represent weak portions of the continental crust, assumed to have a greater tendency for mobility when solicited. In this case, the Brasilia Belt has shown to present great vertical mobility, accommodating tectonic far-field forces by uplift and as a result, feeding the Phanerozoic basins around it. (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 |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |