Detrital zircon U-Pb ages as evidence for deposition of the Saúde Complex in a Paleoproterozoic foreland basin, northern S~ao Francisco Craton, Brazil.
No Thumbnail Available
Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The Archean and Paleoproterozoic terrane of the northeastern part of the S~ao Francisco Craton shows
evidence of a prolonged accretionary history. A major boundary within this portion of the craton is the
Contendas-Jacobina lineament, a 600 km-long north-trending left-lateral thrust fault that separates
major Archean blocks amalgamated during the Paleoproterozoic orogeny. Different supracrustal sequences
occur along this lineament, but the tectonic imbrication erased the original stratigraphy, precluding
the reconstruction of the sedimentary and tectonic evolution of the different groups. We
investigated the sediment provenance and tectonic setting of the Saúde Complex, located in the northern
part of the Contendas-Jacobina lineament and previously taken as part of the Bahia Gold Belt. We found
that the Saúde Complex is part of a Paleoproterozoic foreland basin and correlates with the Contendas-
Mirante Basin in the south. The correlation with the western Au-bearing Jacobina Basin as a single
Paleoproterozoic basin is no longer favorable. The Saúde Complex contains abundant 2.06e2.20 Ga and
2.50e2.68 Ga detrital zircons mainly derived from the eastern Itabuna-Salvador-Curaç a Orogen and
reworked Neoarchean rocks within the orogen, mainly the Caraíba magmatic arc.
Description
Keywords
Citation
ZINCONE, S. A. et al. Detrital zircon U-Pb ages as evidence for deposition of the Saúde Complex in a Paleoproterozoic foreland basin, northern S~ao Francisco Craton, Brazil. Journal of South American Earth Sciences, v. 1, p. 537-548, 2017. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0895981117301700>. Acesso em: 11 fev. 2019.