TITLE:
Airborne Geophysical Investigation of the Tectonic Stability of Geregu North Central Nigeria for Vulnerable Construction
AUTHORS:
Adeyemi Paul Adesope, Ayodeji Adekunle Eluyemi, Frederick Olusegun Adeoti, Peter Adetokunbo, Tunji Omoseyin, Augustine Babatunde Arogundade, Oluwatosin Adeyemi Albert, Akintunde Olanrewaju Olorunfemi, Musa Olufemi Awoyemi
KEYWORDS:
Geregu, Tectonic Stability, Aeromagnetic, Remote Sensing, Lineament
JOURNAL NAME:
Open Access Library Journal,
Vol.13 No.6,
June
30,
2026
ABSTRACT: Aeromagnetic data were employed to assess the tectonic stability of Geregu, one of the proposed sites for Nigeria’s nuclear power plant construction. This study utilized High Resolution Aeromagnetic (HRAD) data processed through horizontal gradient magnitude (HGM), analytic signal amplitude (ASA), and 3-D Euler Deconvolution, to generate lineament maps for evaluating regional tectonic stability. The map of the Total Magnetic Intensity indicates values ranging from ?106.2 nT to 179.7 nT. Analysis reveals that the northwestern, western, and southwestern regions exhibit short-wavelength anomalies superimposed on longer wavelength features. The analysis identified 161 magnetic lineaments corresponding to deep crustal structures and shallow expressions. The region is characterized by a strong magnetic response with structural trends along the directions of ENE-WSW, NE-SW, E-W, and NNE-SSW. Qualitative interpretation confirms that the most dominant structural trend is ENE-WSW, followed by NE-SW and E-W orientations. Twenty-one magnetic lineaments were classified as faults, with fault F1 traversing the Geregu site at depths between 500 - 1500 m. Despite this proximity, no evidence of recent tectonic activity was found, indicating the area has remained tectonically stable and poses minimal seismic risk.