Water is life because it is one of the inevitable ingredients for life survival. The urge for ground water development is very high in Oyo state Housing Estate, Ogbomosho, Southwestern Nigeria. Because the site is experiencing structural developments and there is no other source of water nearby. Surface water is becoming inadequate, thus this study aimed at investigating the hydro geological prospects of the area with a view to delineating for groundwater and its development. Geophysical investigation was carried out in the study area using Very Low Frequency (VLF) method. VLF profiling of 20 m inter stations and 50 m of inter profiling distances were established. This study revealed a number of conductive zones for ground water development for both domestic and commercial purposes.

Graphical abstract Radiogenic Heat Production in the study area.

Structural features of Ikogosi Warm Spring and its environs have been delineated using qualitative and quantitative interpretation methods. Euler-Deconvolution and local wave number methods were adopted for quantitative and qualitative interpretation of aeromagnetic data sheet 243 by Geological Survey Agency of Nigeria (GSN) in 2008, respectively. Euler solution revealed depth range of-2.98 to-290 m to the magnetic sources, while local wave number method revealed depths to magnetic sources/basements ranging from-2.1 to-1311.4 m of the geologic lineaments in Ikogosi Warm Spring and its environs. Both methods revealed outcrop features characterized by their positive depth values above the mean ground level. Both methods proved efficient way of resolving shallow magnetic source depth giving a very plausible depth of-2.1 m for local wave number and-2.98 m for Euler solution in the area of study.

This study is aimed at estimating the radiogenic heat model in the southern part of Ogbomoso, Nigeria. In-situ measurements of activity concentrations of radioelements are randomly taken at seven locations. The individual data point is measured four times, while the average was recorded for accuracy. The results showed that the radiogenic heat produced per radionuclide varies from 28.71 to 143.55 ρW kg−1 for 238U; 89.60 to 217.60 ρW kg−1 for 232Th; 0.0010 to 0.0063 ρW kg−1 for 40K; with mean values of 73.83, 151.04 and 0.0033 ρW kg−1 for 238U, 232Th and 40K respectively. The total radiogenic heat production in the study area varies from 136.23 to 303.73 ρW kg−1, with mean value of 224.87 ρW kg−1. It is shown that thorium is the major contributor to the total heat generated in the study area. The study area is characterized by low heat production potential, which could be attributed to depletion of thorium and uranium in the geological rocks in the environs. Comprehensive radiometric survey to cover the entire city is recommended. This will help in characterization of the radiogenic heat produced per geological unit.

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