Sedimentary and U-Pb detrital zircons provenance of the Paleoproterozoic Piracicaba and Sabará groups, Quadrilátero Ferrífero, Southern São Francisco craton, Brazil
| Autor: | Maximiliano de Souza Martins, Luiz Fernandes Dutra, Cristiano Lana |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010506 paleontology
Provenance Archean Geochemistry 010502 geochemistry & geophysics 01 natural sciences Sabará Group Detrital zircons 0105 earth and related environmental sciences geography geography.geographical_feature_category Orosirian Gandarela syncline lcsh:QE1-996.5 Minas basin lcsh:Geology Craton Rhyacian General Earth and Planetary Sciences Siliciclastic Cercadinho Formation Syncline Quadrilátero Ferrífero Geology Zircon |
| Zdroj: | Brazilian Journal of Geology, Volume: 49, Issue: 2, Article number: e20180095, Published: 03 JUN 2019 Brazilian Journal of Geology v.49 n.2 2019 Brazilian Journal of Geology Sociedade Brasileira de Geologia (SBGEO) instacron:SBGEO Repositório Institucional da UFOP Universidade Federal de Ouro Preto (UFOP) instacron:UFOP Brazilian Journal of Geology, Vol 49, Iss 2 |
| Popis: | The Quadrilátero Ferrífero is an important mineral province located in Southern São Francisco craton, SE Brazil. Its prominent feature is the Gandarela syncline that was formed as part of the regional deformation event in the southernmost part of the craton at ca. 2,000 Ma. The syncline exposes several economically important units of Rio das Velhas and Minas supergroups, widely known for their gold and iron ore mineral deposits. This work focused on the upper Minas Supergroup — Cercadinho Formation and Sabará Group in the Gandarela syncline. We showed detail stratigraphic surveys combined with U-Pb detrital zircon analysis. Data reveal the development of high- to low-density turbidity systems. The first one is related to the deposition of Cercadinho Formation that marks the siliciclastic infilling of the Minas basin. For the Sabará Group, a fine turbidite system of foredeep depocenter is inferred. The detrital zircon analysis indicates that their sediments were derived from Archean, Rhyacian, and Orosirian exhumed terrains, besides granitoids positioned to the south and east of Quadrilátero Ferrífero. We proposed the age of 2,036 ± 25 Ma as the maximum age of deposition of Sabará Group, whose sedimentation occurs in the first stages of Minas accretionary orogeny. |
| Databáze: | OpenAIRE |
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