The Sedimentary Evolution of the Cuiabá Group (Neoproterozoic Paraguai Orogen): A New Approach Applying Sequence Stratigraphy

The Cuiabá Group, widely distributed in the state of Mato Grosso, is a sedimentary sequence that contains essential information about the geological evolution of the Paraguay Orogen. This study aims to apply sequence stratigraphy concepts as a new approach to better understanding sedimentary evolution during the Neoproterozoic. The analysis of lithofacies, depositional environments, and stratigraphic stacking patterns allowed the identification of different system tracts, including rift climax, rift fill, lowstand, transgressive, and highstand. These tracts have significant implications for understanding the basin's geological history. In addition, the influences of tectonics, glaciation, and post-glacial events on the sedimentary evolution of the Cuiabá Group were addressed. The use of sequence stratigraphy provided a comprehensive understanding of the geological history of the basin. It also offered insights into the controls on sedimentation associated with tectonic and climatic events. The results of this study challenge previous interpretations and contribute to advancing knowledge about the Neoproterozoic geological evolution.