Abstract
Sedimentary provenance in the southern sector of the São Francisco Basin, SE Brazil
Highlights
The geological history of the São Francisco Basin is a puzzle and has many implications for the West Gondwana assembly at the EdiacaranCambrian boundary
The Brasília Belt has a wide range of magmatic rocks spanning through the Ediacaran, the plutonism dated at ca. 540 Ma is considered anorogenic (Pimentel 2016), meaning that refinements in the timing regarding the subsidence and filling of the São Francisco Basin still need to be done
Exposed rocks that could potentially be sources of sediments dated at ca. 560 Ma are described in the Southern Brasília Orogen (Coelho et al 2017) and the Ribeira Belt (Heilbron et al 2008) and they go to the south of the São Francisco craton, so that they may have contributed to the basin filling
Summary
The geological history of the São Francisco Basin (east-central Brazil; Fig. 1) is a puzzle and has many implications for the West Gondwana assembly at the EdiacaranCambrian boundary. The timing of the deposition of most of the sediments is constrained to be younger than 560 Ma (Warren et al 2014, Paula-Santos et al 2015), which is much younger than the orogen’s metamorphic peak (~630 Ma; Pimentel et al 1999, Pimentel 2016). As such, this represents early stages of subsidence in the basin. Exposed rocks that could potentially be sources of sediments dated at ca. 560 Ma are described in the Southern Brasília Orogen (Coelho et al 2017) and the Ribeira Belt (Heilbron et al 2008) and they go to the south of the São Francisco craton, so that they may have contributed to the basin filling
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