Modeling the Colatina lineament using geophysical methods: Insights into the geology of ES, Brazil

Abstract

The study of the primary dikes in a given region is essential for comprehending its geological evolution. This study focuses on the offshore region in the state of Espírito Santo (ES), which encompasses one of the major oil sedimentary basins in the country, namely the Espírito Santo Basin. The study area is considered structurally complex due to the presence of numerous structural features, and the present work focuses on the Colatina Lineament. Despite several decades of oil and rock prospecting studies, the lateral and depth boundaries of the lineament are still unknown. Therefore, this study aims to utilize geophysical methods, including magnetic.and gravity, obtained from aerial and terrestrial surveys, respectively, to characterize the Colatina Lineament structurally. The study generated thematic maps using highlight filters to investigate the structural importance of the zone of influence. Additionally, 2.5D forward modeling was performed from gravity data, revealing numerous geological structures generated by crustal movements. To visualize the geological encompassed by the Colatina Lineament, a 3D inversion of the magnetic data was performed. The outcomes facilitated the visualization and mapping of the dike bundle and confirmed the impact of tectonic processes in the region.