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.