Bacias do Ceará e Potiguar: análise geológica e estudo gravimétrico

Abstract

The Ceará and Potiguar basins located in front of Ceará an Rio Grande do Norte states respectively are enclosed in brazilin equatorial margin. Differently of the east margin, where the major strains were distension, the equatorial basin had suffered different deformation standard during your tectonic evolution. There are subdivisions inside Ceará basin whích divides the Ceará basin ín four sub-basins. The Potiguar basin is divided ín onshore and offshore but they aren't different basins. The most productive area is on Potiguar basin, in Ceará basin the petroleum is restricts in Mundaú basin and there is little knowledge in geological area where there isn't petroleum exploration. ln the continental "talude" occurs a zone with no internai seismic reflections. This phenomenon was studied in a gravity survey which was interpreted using seismic information about seismic /ayer. Conclusion about this study brings a change on knowledge in brazilin equatorial margin deve/opment. The seimic anomalous zone occurs due sediments deformation close of the fault of Atlantic Ocean oppenig. This conclusion means that there was "distenção" in brazilian continental margin, not only "transcorrência" during the separation between África and South America continents.