Geological and Geophysical Delineation of Aquifers within Maikunkele and its Environs, North-Central, Nigeria

The delineation of aquifers in Maikunkele and its surroundings was achieved by the analysis of data from Vertical Resistivity Sounding (VES) and aeromagnetic measurements of regolith water level in hand-dug wells. The predominant rock type in the region is granite. Aeromagnetic fractures often have a 1000–2000 m length and a NE–SW trend. A handful of the cracks have a NW–SE pattern. Measurements of the water level in manually dug wells were used to create the water level map. The groundwater flow in the regolith aquifer is shown on the map to be NE–SW. This implies that there is likely an intrusion of the NE-SW cracks. Twelve stations with a maximum current electrode spacing of 200 metres carried out the VES. According to the VES data, the resistivity value of the regolith aquifer ranges from 60 to 100 Ωm, and its base extends between 10 and 40 m. Additionally, they disclosed that the 100–500 Ωm resistivity values of the fractured basement aquifer, which spans between 10 and 60 m, immediately underlies the regolith aquifer. As a result, the direction in which regolith groundwater flows can be affected by basement fissures.