Airborne geophysical surveying of mafic- ultramafic bodies: a study case from jacurici complex (bahia)

The Jacurici mafic-ultramafic Complex hosts the largest chrome deposit in Brazil. This deposit is characterized by the presence of a massive chromitite layer that occurs in a single intrusion tectonically fragmented that, currently, outcrops in different segments along an N-S belt. The present work investigates the characteristics of these bodies through remote sensing techniques and airborne geophysical surveys, describing the geophysical and landform responses of economic targets. The study area presents magnetic anomalies when using 1 derivative filters and tilt derivative of the total magnetic field, whereas eU/K and eTh/K ratios define the best delimitations of igneous bodies using the gamma-spectrometric method. The information presented serves as a prospective parameter in the discovery of new lateral bodies in order to provide a guide for the discovery and analysis of similar deposits by Brazil.