Contribution of Aeromagnetic Data to the Structural Discontinuities Identification of Black Volta Catch-ment Aquifer System in Côte d'Ivoire

  • Armel Kouadio Kouame Laboratory of Soil, Water and Geomaterials Sciences, Training and Research Unit of Earth, Sciences and Mineral Resources, University Felix Houphouet-Boigny, Abidjan, Côte d’Ivoire.
  • Marc Youan Ta University Research Center of Remote Sensing and Application (CURAT), Training and Research Unit of Earth Sciences and Mineral Re-sources, University Felix Houphouet-Boigny, Abidjan, Côte d’Ivoire.
  • Bertrand Houngnigbo Akokponhoue Laboratoire of Applied Hydrology, National Water Institute (INE), University of Abomey-Calavi, Cotonou, Benin.
  • Omer Zéphir De Lasme Department of Geosciences, Training and Research Unit, University Péléforo Gon Coulibaly, Korhogo, Côte d’Ivoire.
  • Kouamé Loukou Nicolas Laboratoire de Géologie, Ressources Minérales et Energétique, UFR Sciences de la Terre et des Ressources Minières(STRM), Université Félix Houphouët Boigny, Abidjan, Côte d’Ivoire
Keywords: Aeromagnetic, Gesosoft Oasis Montaj, Euler deconvolution, structural map, filtering, black volta catchment

Abstract

This study aims to improve the structural knowledge of the fissured aquifers of the Black Volta catchment in Côte d'Ivoire based on the mapping of magnetic lineaments that represent magnetic discontinuities such as magmatic body contacts or tectonic faults. Four filtering methods: pole reduction (equator), gradient (vertical and hori-zontal), upward extension, and angle tilt were applied to the residual magnetic field map to extract magnetic discontinuities using the Oasis Montaj (Geosoft) program. Euler deconvolution coupled with the analytical signal provided, in addition to the horizontal location of the magnetic contacts, an indication of their depths. The re-sulting structural map contains 458 structures with lengths ranging from 9.03 to 66.54 km. Three directions: NW-SE, E-W and NE-SW were detected, with a predomi-nance of the NW-SE direction. Depths estimated by Euler solutions range from 6.8 to 2847 m. This map is consistent with many faults already recognised or assumed by traditional structural studies and tectonic events affecting the Ivorian basement. These results contribute significantly to the improvement of the structural map of the Black Volta Basin in Côte d'Ivoire. In addition to the major known tectonic faults, numerous lineaments, particularly those at depth, have been highlighted by the pre-sent study. 

 

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Published
2023-08-31
How to Cite
Kouame, A. K., Youan Ta, M., Akokponhoue, B. H., De Lasme, O. Z., & Nicolas, K. L. (2023). Contribution of Aeromagnetic Data to the Structural Discontinuities Identification of Black Volta Catch-ment Aquifer System in Côte d’Ivoire. European Scientific Journal, ESJ, 20, 531. Retrieved from https://eujournal.org/index.php/esj/article/view/17163
Section
ESI Preprints