Abstract
Abstract. Apatite fission-track (AFT) analyses, applied to Southern Brazil
and Uruguay samples, was employed aiming to understand the low temperature
history of the Dom Feliciano Belt Segment. The Dom Feliciano Belt formed
during the Neoproterozoic to Early Paleozoic, linked to the
Brasiliano/Pan-African Orogeny. Twenty-four samples were dated, and confined
track lengths of twenty samples were measured. The spatial distribution of
ages shows three domains with different evolution cut by shear zones and, or
suture zones in the Dom Feliciano Belt. The Western Domain exhibits AFT ages
> 250 Ma (Permian to Devonian) while the Eastern Domain shows
AFT ages < 230 Ma (Paleogene to Triassic). In the Central Domain,
the AFT ages range from ∼196 to 130 Ma (Jurassic to Early Cretaceous).
The thermal modeling in the domains revealed a complex evolution, with
cooling and reheating phases, and a denudation of ∼2600 m. The AFT ages
clearly postdate the Gondwanide, Paraná-Etendeka and Rio Grande Cone
exhumation history of the Dom Feliciano Belt.
Reference85 articles.
1. Almeida, D. P. M., Chemale Jr., F., and Machado, A.: Late to Post-Orogenic Brasiliano Pan-African Volcano-Sedimentary Basins in the Dom Feliciano Belt, Southernmost Brazil, Petrology, 73–130, 2012.
2. Almeida, F. F. M. and Carneiro, C. D. R.: Origem e evolução da serra do mar, Rev. Bras. Geo., 28, 135–150, 1998.
3. Almeida, F. F. M., Brito Neves, B. B., and Carneiro, C. D. R.: The origin and evolution of the South American platform, Earth Sci. Rev., 50, 77–111, 2000.
4. Barboza, E. G., Ros, A. M. L. C. C., and Ayup-Zouain, R.: Cronoestratigrafia da Bacia de Pelotas: uma revisão das sequências deposicionais, Grave, Porto Alegre, 6, 125–138, 2008.
5. Basei, M. A. S., Frimmel, H. E., Nutman, A. P., and Preciozzi, F.: West Gondwana amalgamation based on detrital zircon ages from Neoproterozoic Ribeira and Dom Feliciano belts of South America and comparison with coeval sequences from SW Africa, in: West Gondwana, Pre-Cenozoic correlations across the South Atlantic region, edited by: Pankhurst, R. J., Trouw, R. A. J., Brito Neves, B. B., and de Wit, M. J., Geological Society, Special Publication, 294, 239–256, 2008.
Cited by
11 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献