http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/64 Applied Geophysics Sun, 14 Jun 2026 13:16:45 GMT 2026-06-14T13:16:45Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30955 Title: Effect of High Concentration of Equivalent Thorium (eTh) And Uranium (eU) Within Part of North Central Nigeria on Geothermal Parameters Authors: Adetona, A; Adebayo, Kwaghhua I. Fidelis; Alkali, A Abstract: A high amount of heat flow from a shallow curie depth is essentially related to a promising geothermal resource. This work explores the depth of demagnetisation due to high radiogenic heat content of the basement rocks. The Total Magnetic Intensity and the radiometric data, consisting of the Potassium count, the Uranium and Thorium equivalents, were employed for the research work. Sheet 145 (Kajuru) and 146 (Geshere) both on latitude 10°00'N to 10°30'N and longitude 7°30'E to 8°30'E covering 6,050 km2 within Kaduna State of Central Nigeria is an area with notedly high concentrations of these radionuclide by previous researchers. A shallow Curie point depth of 12.00 km was observed below Wugana while heat flow values ranging from 30.00 mW/m2 to 160 mW/m2 was estimated with an average of 80.60 mW/m2. Also, the geothermal gradients varied from 8.00 to 50.00 °CKm-1, with an average value of 25.50 °CKm-1. The effect of heat generated from the Potassium count, equivalent concentrations of Uranium and Thorium indicated the Northern end down to the Mid-western end displays medium to high radiogenic heat production (3.6 – 4.5 μW/m3). In conclusion, areas with low Currie depth that coincide with relatively high radiogenic heat production are located within Wugana, New Kwasan, and down to Ron villages, which are generally located at the Mid-North and Mid-Western areas with intrusive granitic rocks Fri, 01 Mar 2024 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30955 2024-03-01T00:00:00Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30951 Title: Application of the Geoelectric Characterization of the Aquifer in Kwakuti, North Central Nigeria Authors: Alhassan, D.U; Aliu, O.D; Alkali, A; Rafiu, A.A; Adetona, A.A; Mohammed, A; Salako, K.A Abstract: Vertical Electrical Sounding (VES), using Schlumberger array was carried out to investigate the subsurface layer parameters used to delineate groundwater potential of a 500 x 500 m area of land defined by latitude 9.416622 N to 9.421171 N and longitude 6.618314 E to 6.622833 E located at Government Secondary School, Kwakuti, Niger State. A total of 36 VES points at 100 m interval were sounded with a 100 m maximum half inter current electrode spacing (AB/2). Result revealed that the study area is underlain by three (3) geoelectric layers which include: the top soil with 104.5 to 2260.5 Ωm, 0.6 to 3.8 m and 0.6 to 3.8 m as its range of resistivity, depth and thicknesses respectively; the weathered/fractured layer having resistivity of 44.9 to 606.0 Ωm, depth of 4.3 to 28.6 m and thickness of 4.2 to 26.2 m was considered aquifer layer. The fresh basement has 919.4 to 3816.9 Ωm as its range of resistivity value with undefined depth and thickness. The observed curve types were 100% H. Five (5) VES stations C3, C4, D2, D5, and E4 were delineated as aquifer potentials of the study area, having weathered/fractured resistivity, depths and thickness range from 135.2 to 227.7 Ωm, 20.6 to 28.6 m and 17.8 to 26.2 m respectively Sat, 01 Jan 2022 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30951 2022-01-01T00:00:00Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30946 Title: Geothermal Energy Potential in North Central Nigeria Authors: Alkali, A; Alhassan, D.U; Salako, K.A; Lawrence, J. O; Rafiu, A.A; Udensi, E.E Abstract: This research focuses on using geothermal parameters of Curie point depth, geothermal gradient and heat flow from spectral techniques of aeromagnetic data in finding the possible geothermal potential zone existing around parts of North central Nigeria to solve the energy –related challenges facing the country. The study region is confined by latitude 9.00o to 10.00o N and longitude 7.00o to 9.00o E, with an estimated total size of 24, 200 km2 . The study used a qualitative and quantitative approach to examine depth estimates from the spectral analysis of the magnetic anomalies. The Total magnetic intensity map was divided into twenty - eight overlapping blocks, each block was subjected to spectral analyses to obtained centroid depth (Zo) and depth to top of basement (Zt) obtained from the plots, were used to calculate the Curie point depth (CPD), which was then used for computation of geothermal gradient and heat flow of the area. The results computed shows that, Curie Point Depth (CPD) depth, ranged from 3.449 km and 19.31 km with an average depth of 9.196 km, The geothermal gradient ranged between 30.03 oCkm-1 to 168.16 oCkm-1 with average of 70.98 oCkm-1 while the heat flow ranged from 176.24 mWm-2 to 262.77 mWm-2 with an average value of 178.17mWm-2 respectively. It was observed from the contour maps that the highest Curie Point Depth is located at the southern part at a depth of 18.5 km, while the northern part has the lowest Curie Point Depth at a depth of 14.5 km which corresponds to Gitata and Naraguta areas. The findings indicate that the research location is unsuitable for geothermal energy due to the high anomalous Mon, 01 Sep 2025 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30946 2025-09-01T00:00:00Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30942 Title: Aeromagnetic Investigation of the Subsurface Sturctures in Parts of Niger Delta, Nigeria Authors: Abeki, J.P.A; Adedokun, I.O; Alkali, A; Bunonyo, Y.T; Udensi, E.E Abstract: The geophysical interpretation of Aeromagnetic data over the study area bounded by longitude 4°00′–5°00′ and latitude 5°30′–6°30′ provides crucial insights into the subsurface geological configuration, with significant implications for hydrocarbon exploration. Reduced-to-Equator (RTE) map reveals magnetic values ranging from 32,869.16 nT to 33,037 nT, reflecting the influence of subsurface lithology and tectonic structures. High magnetic intensities in the East–central and South Western part of the map, often correlate with the presence of ferromagnetic minerals, such as magnetite-rich mafic and ultramafic rocks, suggesting potential igneous intrusions or lithological boundaries, the lower magnetic zones, illustrated in blue west–central part of the map, indicate nonmagnetic sedimentary units, deep basement rocks, or zones of weathering and alteration. The high magnetic intensity closures observed within the basin are likely associated with the underlying basement rocks or with igneous intrusions that may have penetrated the sedimentary sequence. Depth estimation techniques such as Euler Deconvolution utilize a structural index (SI = 1) to delineate linear geological features like faults and dykes, with clustered solutions indicating complex basement architecture. Source Parameter Imaging (SPI) analysis estimates source depths exceeding 3.0 km, confirming the presence of thick sedimentary basins critical for hydrocarbon maturation. Spectral analysis indicates basement depths between 8.7 and 11.6 km, with deeper zones concentrated centrally and southeast part , aligning with potential depocenters. The First Vertical Derivative (FVD) map indicates the passage of the paleo-fracture zone through the area. This is also indicated in the discontinuity shown in the Total Magnetic Intensity (TMI) map. These datasets improve the geological interpretation of the region, reveal structurally controlled sedimentary basins, and help outline prospective zones for hydrocarbon exploration and development within the Niger Delta. Mon, 19 Jan 2026 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30942 2026-01-19T00:00:00Z