Observations on the stratigraphic chart and the tectonic-sedimentary e evolution of the Sergipe and Alagoas basins

Abstract

The objective of this paper is to discuss the stratigraphic chart of the Sergipe and Alagoas basins, considering tectonic aspects. For this purpose, a mega-regional analysis of quite a wide seismic network, integrated with gravitational and magnetic data, as well as analogies with other sedimentary basins, is used. In the first part, the tectonic-sedimentary evolution and the principal unconformities shown on the stratigraphic chart are discussed; in the second part, the possible occurrence of halokinesis in deep waters in the Sergipe and Alagoas basins is discussed, analyzing conceptual models and analogies with other sedimentary basins. Finally, a proposed tectono stratigraphic chart is shown, which includes the modifications discussed.