Gamma Ray Assessment of Subsurface water-Rock interaction in Abuja from Geologic Background and Its Effect in Groundwater, Nigeria (Review Article)

Abstract

The radiometric interpretation of geologic data is aimed at mapping the concentration of Uranium, Thorium and Potassium and its effect in groundwater in subsurface rock formations. The water has been consumed without treatment and during drilling, the process cut across so many rock formations. The Uranium and Thorium exist in this rock formation like granite to some extent which could contaminate the groundwater system through leaching and weathering process. This study is to address the issue by determining the concentration of uranium, Thorium and potassium in the water-rock interface. The mean dose equivalent for rock samples will be obtained and determine the health implications or adverse effect on the populace and the environment. The methodology will include drilling of boreholes measuring 40m, 50m, 60m and 70m in depth using 30ton capacity Rig machine. Samples obtained during cutting and coring will be analyzed using High Resolution Gamma Spectroscopy. From the 3D model, it indicates the linear relationship in water-rock lithologic structure. The linear relationship between unit volume of granite, hydraulic gradient and hydraulic conductivity is inferred to be the effect of tectonic activity during Pan African Orogeny in Nigeria.

Keywords: Geologic Map of Abuja, 3D Model of (hydraulic conductivity; Unit Volume of Granite and hydraulic gradient)