Browsing by Author "Olasehinde, Ibikunle"
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Item An Assessment of Groundwater Potential of Parts of Ikono LGA (Akwa-Ibom State), S.E. Nigeria(Nigerian Association of Hydrogeologists, 2003) Olasehinde, Ibikunle; Olawuyi, KehindeThe groundwater potential of an area of 1406 Km2 within the Benin formation-southeastern Nigeria has been assessed based on data from six boreholes sunk at various locations within the Ikono Local Government Area of Akwa-Ibom State, Nigeria. The Benin formation is composed of loosely consolidated sands and gravels with minor intercalations of shale. The sands are poorly sorted, sub-rounded to rounded, medium to coarse grained and often pebbly. The characteristics of the borehole determined include: lithologic log, yield, drawdown, hydraulic conductivity and transmissivity. The yield ranges between 472.32-1918.4 m3/day while the transmissivity ranges between 106.08-700.84 m2/day. The findings indicate the area to have moderate to high groundwater potentials. The borehole production could have been better if the borehole drilling had been preceded by thorough geophysical studies to pick more favourable locations.Item A Gradient Analysis-Based Study of Aeromagnetic Anomalies of Some Dikes in the Nupe Basin of Nigeria.(Federal University of Technology, Minna, Nigeria., 2013) Olasehinde, Ibikunle; Olawuyi, KehindeAn aeromagnetic intensity contour map of a part of Nupe Basin of Nigeria was acquired, digitized and analysed. This work was carried out for a better understanding of the study area using the Gradient analysis-based technique to calculate depth to basement and to interpret the aeromagnetic anomaly map of the area. Statistical method of Olasehinde (1991) was employed to produce a geological map of the area. Regional-residual separation of the total intensity map was done to produce a residual aeromagnetic intensity data. Depths to the magnetic source bodies were estimated from the profiles obtained from residual data using Pal’s (1985) gradient analysis method. The estimated depths ranged from 0.44km to 1.67km which agrees with those predicted by some earlier workers on the Nupe Basin. These depths fall within the lithospheric layer of the earth and the causative magnetic anomalies body are likely basic intrusives. While this approach appears cheap, accurate and cost-effective, it is recommended that other ground geological and geophysical techniques be applied to further strengthen the assertions made in this work.