Produção Nacional
Revisado por pares
Chapter 3 The São Francisco Palaeocontinent
2009; Elsevier BV; Linguagem: Inglês
10.1016/s0166-2635(09)01603-x
ISSN2452-1892
AutoresAlcídes N. Sial, Marcel Auguste Dardenne, Aroldo Misi, Augusto José Pedreira, Claudio Gaucher, Valderez P. Ferreira, M. A. Silva Filho, Alexandre Uhlein, Antônio Carlos Pedrosa‐Soares, Roberto Ventura Santos, Marcos Egydio‐Silva, Marly Babinski, Carlos José Souza de Alvarenga, Thomas R. Fairchild, Márcio Martins Pimentel,
Tópico(s)Geochemistry and Geologic Mapping
ResumoThe São Francisco and the Congo cratons represent sectors of a Neoproterozoic palaeocontinent preserved from the Brasiliano-Pan African orogeny, recorded in their marginal belts. The boundaries between the São Francisco Craton and the surrounding belts are marked by intensive folding and overthrusting. In the interior of the craton, Neoproterozoic sedimentary covers are horizontal or gently deformed, forming isolated basins. The term São Francisco Basin includes Palaeo- and Mesoproterozoic successions but in this chapter it is restricted to the Neoproterozoic sedimentary successions of the São Francisco Supergroup, characterised by a glaciogenic unit at the base and an argillaceous–carbonatic–arkosic unit at the top. The Neoproterozoic evolution of the São Francisco Craton, including its marginal belts and sedimentary cover, is reviewed. The lithostratigraphy, Neoproterozoic mineralisations (lead, zinc, fluorine, barium and phosphates) and geochronological and stable isotope studies are also presented. The geological record of glacial events and stable isotope data of related cap carbonates are also discussed.
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