Abstract
The collision between the Congo Craton and the Pan African fold belt of Central Africa had great impacts on the geological and tectonic points of view, notably the installation of several tectonic accidents such as faults, fractures, dikes, folds, domes. This aeromagnetic study is based on Paterson's aeromagnetic data interpretations through the use of multiple operators. These data were processed by Oasis Montaj software. The total magnetic intensity map reduced to the equator (RTE-TMI) shows important anomalies features the major important regional anomalies. Maps of the vertical gradient, analytical signal and tilt angle maps have meanwhile highlighted several short wavelength anomalies assimilated to folding, dykes, fractures or faults. The map of maxima upward to 2 km allowed to establish the structural map of the study area. It turns out that the different types of geological accidents follow ENE-WSW, ESE-WNW, NE-SW, NW-SE and even E-W and N-S directions. All these directions are very similar to the geological history of the area. Anything that seems to confirm that the study area was the scene of intense tectonic movements resulting from the collision between the Congo Craton and the Central Africa Fold Belt.
Highlights
The analysis of lineaments represents an important step in geological survey
The study area is characterized by tectonic features such as folds, faults and important undulations illustrated by previous geological works (Gazel & Gerard, 1954; Toteu et al, 2004; Ngako et al, 2008)
The structural features observed in the study area, such as folds and faults, highlight the important tectonic activities occurred over the Central African Fold Belt (CAFB)
Summary
The analysis of lineaments represents an important step in geological survey. Several works interpret geophysical lineaments as faults or geological contacts (Atawa et al, 2018) or targets for mineralization emplacement (Abate Essi et al, 2017). The study area is characterized by tectonic features such as folds, faults and important undulations illustrated by previous geological works (Gazel & Gerard, 1954; Toteu et al, 2004; Ngako et al, 2008) It is located in the contact zone between the two main geological domains of Cameroon namely Archean Congo Craton (CC) and Neoproterozoic Central African Fold Belt (CAFB) (Toteu et al, 2004). Heavy magnetic and granite formations are represented by large circular geophysical anomalies (Owono-Amougou et al, 2019) All these identified structural elements are in accordance with the results obtained from previous geological and geophysical surveys (Meying et al, 2009; Feumoe et al, 2012) carried out in the study area and neighboring zones. Belonging to the Pan-African belt, the study area presents structural features trending NW-SE that are described as the fingerprint of the CC (Owono-Amougou et al, 2019)
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