[01] Jean Jacques Nguimbous-Kouoh, Department of Mines, Petroleum, Gas and Water Resources Exploration, Faculty of Mines and Petroleum Industries, University of Maroua, Kaele, Cameroon. [02] Eliezer Manguelle-Dicoum, Department of Physics, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon.

Knowing where potable water is in certain parts of Cameroon is a difficult operation. The aim of this work is: to present the results of vertical electrical soundings (VES) carried out in ten villages of Adamawa and to determine the areas favourable to the implantation of drinking water boreholes and propose a structural interpretation. Correlations between the sounding curves and the lithologic sections enabled to determine: the depth of the geological layers likely to contain water and the maximum depth of the boreholes. Resistivity maps were computed to map areas suitable for water drilling and to locate resistivity lineaments and their direction. These maps demonstrated that the preferred structural directions in the region are N-S, E-W, NW-SE, and NE-SW. Structural interpretation has been performed through pseudo-sections, geoelectric sections, and geologic sections to highlight areas of faults, fractures, and other types of geological objects. This structural interpretation enabled to highlight: faults supposed to be crustal and inferred; geological formations of tertiary volcanism; Cretaceous sediments; pan-African syn and post-tectonic granitites and relics of an ebonite basement.

VES, Sounding Curves, Lithology-Log, Hydrogeology, Structural Interpretation

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