Author(s)

Jean Aimé Mono^1,2*, Marcelin Bikoro Bi-Alou³, Arsene Meying⁴, Theophile Ndougsa-Mbarga^1,5, Stéphane Patrick Assembe⁶, Crépin Timoléon Kofané¹

¹Postgraduate School of Sciences, Technologies & Geosciences, University of Yaoundé I, Yaoundé, Cameroon.
²Basical Sciences Teaching Department of Advanced Technical Teacher Training School, University of Douala, Douala, Cameroon.
³Department of Earth Sciences, Faculty of Science, University of Maroua, Maroua, Cameroon.
⁴School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon.
⁵Department of Physics, Advanced Teacher’s Training College, University of Yaoundé I, Yaoundé, Cameroon.
⁶Faculty of Science, University of Bamenda, Bambili, Cameroon.

The present work aims to determine the geological structure, to highlight and to determine the characteristics of the fault system responsible for the current structure of the study area through the interpretation of available aeromagnetic data. Total magnetic intensity anomaly (TMI) was critically interpreted using several analysis techniques including Reduction to Equator (RTE), First Vertical Derivative, upward continuation, spectral analysis and 2D^3/4 modelling. All results obtained from the interpretation process were combined together to draw an interpretative geological map of the area and allow the general view of the surface and sub-surface structures. The interpretative geological map reveals that the geological formations of the studied area appear to be intensely fractured by an E-W, ENE-WSW and NE-SW main orientation fault system. The lineaments identified in the area study could be linked to the Pan-African orogeny and seem to correspond to deep-seated basement structures, which are referred to the tectonic boundary between Congo Craton and the Pan-African orogeny belt. According to spectral analysis results, the depths of the sources of superficial and deep magnetic anomalies are 2500 m and 12,000 m respectively. The 2D^3/4 modelling of one magnetic profile plotted on the reduced residual map at the equator was performed to approximate the geometry and depth of the sources of magnetic anomalies, the model suggests the intrusion of a large body of high susceptibility during the continental collision. The results of this study can be used to better understand deep-seated basement structures and to support decisions with regard to the development of industrial areas, as well as of hydrogeological and/or mining investigations to be undertaken in the study area.

Aeromagnetic, Upward Continuation, Spectral Analysis, Modelling 2D^3/4

Mono, J. , Bi-Alou, M. , Meying, A. , Ndougsa-Mbarga, T. , Assembe, S. and Kofané, C. (2019) Crustal Structure and Tectonic Setting over the Panafrican Domain in Loum-Minta Area (Centre-East Cameroon) from Aeromagnetic Analysis. Journal of Geoscience and Environment Protection, 7, 61-81. doi: 10.4236/gep.2019.74005.