Fracture Delineation for Groundwater Target in a Precambrian Hydrogeological Setting in Part of Ado Ekiti, Southwestern Nigeria

Abstract

This paper focused on the delineation of fracture zones in relatively Precambrian aquifer rocks for groundwater targeting in New Iyin road of Ado Ekiti, Southwestern Nigeria from Geophysical imprints. A total of two (2) Electromagnetic (EM) profiles and six (6) Vertical electrical sounding (VES) were acquired. The traverse was conducted along the Eastern to western flank. Four prominent geologic layers were delineated to diagnose the prolific aquifer units in the study area, which includes the fractured aquifer and the weathered layer. The entire traverse shows the signature for Water bearing zone, which are considered homogeneous of the aquifer. Four signature of aquiferous zone along the traverse 1, comprises both weathered, fracture and partly fresh basement along the traverses is 6m, 7m, 12m and 16m. However, the hydrogeological significance of the traverse is prolific mostly in VES 6, which is a diagnostic feature of the aquifer owing to the appreciable thickness being the targeted point for groundwater development in the Precambrian rock of New Iyin, Ado Ekiti. The hydrogeological pattern in the area gives an overview of the nature of aquifer layers and this will invariably help the drillers as well as water resources policy makers in their drilling operations.