Abstract
In this study, we performed some filters to highlight geological structures and/or features which are found in the igneous rocks, between the latitudes 9°45'N to 10°45'N and longitudes 13°15'E to 14°30'E. The application of the first vertical derivative (FVD) and the horizontal gradient magnitude (HGM) on a total magnetic data over the study area has led to put in evidence: 1) geological features as geological boundaries, faults, dykes, folds on the FVD map; 2) abundant aeromagnetic lineaments probably fractures, dykes and contacts, ex-hibit a conjugate relationship suggesting a near NE and NW tectonic trends; 3) existence of a possible prominent near E-W compression, characterized by a possible dextral displacement of geological formations by the shear movements; 4) and the magnetic signature of the country rocks.
Highlights
In principle, magnetic surveying is similar to gravity i.e. it deals with potential fields
Two main analysis techniques were applied to aeromagnetic data to delineate the subsurface structures or to map the location of the magnetic source edges
The results revealed more prominent lineaments due to deep and shallow sources
Summary
Magnetic surveying is similar to gravity i.e. it deals with potential fields. Magnetic measurements are simple to make and reduce, but very complicated to understand and interpret [1]. Ngoh et al 782 interpreting magnetic anomalies greatly limits their use [1]. There has been resurgence in interest in the magnetic surveying because of the advent of extremely high resolution surveys that can reveal structures in, sedimentary sequences [1]. Many types of images can be produced from magnetic data sets. Many filters can be used to improve magnetic data interpretation. Among these are the first vertical derivative and horizontal gradient magnitude filters
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