Abstract
This study is based on the analysis and interpretation of aeromagnetic data using version 8.4 of the Geosoft Oasis Montaj Software, to map the subsurface or deep geological structures that affected the geological formations of the Ngaoundere area. The use of the standard aeromagnetic methods made it possible to draw up the maps of the residual magnetic field reduced to the equator (RTE), the horizontal gradient (HG), the analytical signal (AS) and that of the Euler solutions (ED) to find the main magnetic facies corresponding to these structures. The geological formations of the studied area thus appear to be intensely fractured by a NE-SW (N45°E) and ENE-WSW (N70°E) main orientation fault system, the depth of which has been estimated by combining the three-analytical methods HG, AS and ED. Advanced magmatic map analysis revealed dikes associated with vertical faults in the studied area. The development of an interpretative geological map taking into account the basic geology, the deep faults, the identified dikes and the mineralization index made it possible to extract a correlation between geological structures and mineralization of the studied area. The 2.5D modelling of two magnetic profiles plotted on the reduced residual map at the equator was performed to approximate the geometry and depth of the dikes sector, which are potential sources of mineralization here.
Highlights
Since 1970, the Adamawa plateau in general and the studied area has been the subject of several geological studies by several authors, such as the studies conducted by Eno Belinga [1], Dumont [2], Ngounouno [3], roughly covering petrography, geochemistry and tectonics in the study area
The use of the standard aeromagnetic methods made it possible to draw up the maps of the residual magnetic field reduced to the equator (RTE), the horizontal gradient (HG), the analytical signal (AS) and that of the Euler solutions (ED) to find the main magnetic facies corresponding to these structures
The geological formations of the studied area appear to be intensely fractured by a NE-SW (N45 ̊E) and ENE-WSW (N70 ̊E) main orientation fault system, the depth of which has been estimated by combining the three-analytical methods HG, AS and ED
Summary
Since 1970, the Adamawa plateau in general and the studied area has been the subject of several geological studies by several authors, such as the studies conducted by Eno Belinga [1], Dumont [2], Ngounouno [3], roughly covering petrography, geochemistry and tectonics in the study area The results of these studies show that, on one hand, the basement of the studied area consisted mainly of gneiss and granite, the latter being crossed by granitoids and on the other hand, the major structures of the area had WSW-ENE (N70 ̊E), NE-SW (N45 ̊E) and NNE-SSW (N30 ̊E) orientations. They consisted of processing and interpreting the gravity data acquired during various gravity campaigns carried out in the sixties over the Cameroonian territory They aimed to provide additional information on the structuration and geodynamic evolution of the Adamawa plateau. Based on the existence of aeromagnetic data coverage over the studied area, which comprises longitudes 12 ̊30' - 13 ̊30'E and latitudes 6 ̊45' - 7 ̊15'N, the present study is initiated to enhance the level of structural knowledge
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
