https://doi.org/10.5194/se-2020-135 Preprint. Discussion started: 2 September 2020 c Author(s) 2020. CC BY 4.0 License. 1 Structural features derived from a Multiscale Analysis and 2.75D Modelling of 2 Aeromagnetic Data over the Pitoa-Figuil Area (Northern Cameroon) 3 4 5 Voltaire Souga Kassiaa; Theophile Ndougsa Mbargaa,b*;Arsène Meyingc; Jean Daniel Ngoha; Steve 6 Ngoa Embeng a 7 8 aPostgraduate School of Science, Technology and Geosciences, University of Yaoundé I, Yaoundé, Cameroon 9 bDepartment of Physics, Advanced Teacher’s Training College, University of Yaoundé I, P.O. Box 47, Yaoundé, Cameroon c 10 School of Geology and Mining Engineering, University of Ngaoundéré, P.O. Box 115, Meiganga, Cameroon 11 12 Correspondence should be addressed to Ndougsa Mbarga Theophile; *
[email protected] 13 14 15 ABSTRACT: 16 In the Pitoa-Figuil area (Northern Cameroon), an interpretation of aeromagnetic data was 17 conducted. The aim of this investigation was first to emphasize lineaments hidden under geological 18 formations and secondly to propose two 2.75D models of the subsurface structures. Different 19 magnetic data processing techniques were used, notably horizontal gradient magnitude, analytic 20 signal, and Euler deconvolution. These techniques in combination with the 2.75D modelling to the 21 aeromagnetic anomaly reduced to the equator permit to understand the stratification of the deep 22 and near surface structures, which are sources of the observed anomalies. We managed to put in 23 evidence and characterize 18 faults and some intrusive bodies. According to Euler’s solutions, 24 anomaly sources go up to a depth of 5.3 km.