Qualitative Induced Polarisation Validation of the Results of a 2 km2 VES Study Completed at the Gidan Kwano Campus Phase II Development, Federal University of Technology, Minna, Nigeria

Abstract

The 2km2 vertical electrical sounding (VES) study under consideration here is Jonah et al. (2014i) for which no tandem and coincident-point induced polarisation (IP) data set was collected in the course of that survey completed in 2013; this 2km2 VES survey was conducted at 200m principal station-spacing and the areal extent is subsumed within the southern half of the 8km2 total area Gidan Kwano Campus (GKC) Phase II Development. The aim of this study is to provide “a refinement of sorts” or “a further constraint” on the result of the interpretation of the VES survey at the 2km2 slice of Phase II of the GKC by employing corresponding IP data set in quality control (QC) mode. All aspects of the tandem VES-IP survey in two-dimensional (2-D) mode was completed in the transverse traverse (TT) trend. For the qualitative discussion herein, examination of each of the separate IP tables of values was fixed for a benchmark depth of 40m because this 40m-window restriction is due to the fact that, in the larger basement complex region of which the present area of study is but a small constituent, the thicknesses of the different phases of overburden materials never exceed 35m. Based on the analysis of the corresponding IP tables, for which the IP method is the second-stage constraint to the earlier VES interpretation, the aquifer rospects that were tagged “strongly aquiferous” in Jonah et al. (2014i) are now even qualified as “very strongly aquiferous,” meaning that the IP method is a great QC tool like was suggested by Parasnis (1986).