“… Figure 1 Simplified geological map of Nigeria and its surrounding areas showing the location of the Middle Niger Basin, which is indicated with a yellow polygon on the map. (Adapted from Salawu et al., 2021 ). The Abbreviation used: KZISZ - Kalangai-Zungeru-Ifewara shear zone.…”
Section: Introductionmentioning
confidence: 99%
“…The Abbreviation used: KZISZ - Kalangai-Zungeru-Ifewara shear zone. Reprinted by permission from [the Licensor]: [Springer Nature] [Geomechanics and Geophysics for Geo-Energy and Geo-Resources] [Structural geometry of Ikogosi warm spring, southwestern Nigeria: evidence from aeromagnetic and remote sensing interpretation, Salawu et al., (2021) , [COPYRIGHT] (2021). Journal website: https://www.springer.com/journal/40948 .…”
The Middle Niger Basin is located within the west-central half of Nigeria, as a NW-SE trending Campano-Maastrichtian depo-centre which extends from the southern end of the Sokoto Basin west of Kainji reservoir southwestwards to the convergence of the Benue and Niger Rivers at Lokoja. The aeromagnetic anomaly data of the Middle Niger Basin was interpreted to characterize the structural architecture and depth to the magnetic basement of the basin. This is to expand the current knowledge of the region. The analysis of the data has been facilitated by the application of derivative and source parameter imaging techniques. The results from the application of total gradient to the aeromagnetic data provided here signify a rift origin of the basin and NW-SE trending fault systems in the surrounding basement complex terrain. The absence of magnetic highs on the first vertical derivative of the reduced-to-pole aeromagnetic data reveals lack of volcanic rocks within the sedimentary layers of the basin. Additionally, the consistent NW-SE trending source parameter imaging depth solutions within the basin confirm the internal geometry and NW-SE orientation of the basin with sediments not more than 1100 m thick.
“… Figure 1 Simplified geological map of Nigeria and its surrounding areas showing the location of the Middle Niger Basin, which is indicated with a yellow polygon on the map. (Adapted from Salawu et al., 2021 ). The Abbreviation used: KZISZ - Kalangai-Zungeru-Ifewara shear zone.…”
Section: Introductionmentioning
confidence: 99%
“…The Abbreviation used: KZISZ - Kalangai-Zungeru-Ifewara shear zone. Reprinted by permission from [the Licensor]: [Springer Nature] [Geomechanics and Geophysics for Geo-Energy and Geo-Resources] [Structural geometry of Ikogosi warm spring, southwestern Nigeria: evidence from aeromagnetic and remote sensing interpretation, Salawu et al., (2021) , [COPYRIGHT] (2021). Journal website: https://www.springer.com/journal/40948 .…”
The Middle Niger Basin is located within the west-central half of Nigeria, as a NW-SE trending Campano-Maastrichtian depo-centre which extends from the southern end of the Sokoto Basin west of Kainji reservoir southwestwards to the convergence of the Benue and Niger Rivers at Lokoja. The aeromagnetic anomaly data of the Middle Niger Basin was interpreted to characterize the structural architecture and depth to the magnetic basement of the basin. This is to expand the current knowledge of the region. The analysis of the data has been facilitated by the application of derivative and source parameter imaging techniques. The results from the application of total gradient to the aeromagnetic data provided here signify a rift origin of the basin and NW-SE trending fault systems in the surrounding basement complex terrain. The absence of magnetic highs on the first vertical derivative of the reduced-to-pole aeromagnetic data reveals lack of volcanic rocks within the sedimentary layers of the basin. Additionally, the consistent NW-SE trending source parameter imaging depth solutions within the basin confirm the internal geometry and NW-SE orientation of the basin with sediments not more than 1100 m thick.
The present study combined analysis of satellite, aeromagnetic and radiometric data for evaluation of structural features within the Ife-Ilesha schist belt. Shuttle Radar Topographic Mission digital elevation data have been enhanced using hill-shading technique for the delineation of morphological features. The superposition of total gradient amplitude lineaments on the 3-D Euler deconvolution map revealed the trends and depth of structural features within the study region. The major trends are NE–SW, NNE–SSW, E–W and minor trends in the N–S direction, including the Ifewara shear zone that trends in the NNE–SSW. The estimated depths to the top of the sources within the shear zone varies from 90 to 200 m. Complementary analysis of the airborne radiometric data revealed that the Ifewara shear zone and adjacent regions are characterized by radiometric anomalies, indicating regional mineralization alteration zone. Generally, there is a good correlation between the satellite, radiometric, aeromagnetic maps which provides new insights and re-evaluation of structural features.
“…There have been so many researches in the Ikogosi warm spring (IKGWS) area in the attempt to understand the general structural pattern and their results pointed to the fact that IKGWS is situated along a trending faults and fractures (Ojo et al 2011;Abraham et al, 2014). As a follow-up, some research work has also been done to investigate the prospect of geothermal energy exploration and their results indicated potential of the IKGWS for geothermal prospect based on the fact that fractures and faults acts as pathways for the thermal fluid to the subsurface (Abraham and Alile, 2019;Salawu et al, 2021;Sedara, 2020;Sedara and Alabi, 2021). Thus, in a follow up for these geothermal investigations within IKGWS, we have attempted to scale and classify the geothermal potential prospect of the area using combined thermal properties of rocks within the study area.…”
The thermal and physical properties of rock units from Ikogosi Warm Spring (IKGWS) in the Southwestern part of Nigeria were examined in order to characterize and explore its geothermal prospect and to provide an insight into the different thermal properties of rocks of the study area.
A total of 40 rock samples made up of granite, quartzite and gneiss series were collected from the outcrops of the study area and analyzed for Thermal conductivity (TC), Radiogenic heat production (RHP), Heat flow (HF), Porosity, Density and surface spring temperature measurements.
The RHP values for all samples varied from 1.8 to 3.5µWm-3 with an average value of 2.5µWm-3 and standard deviation (SD) of 0.4 while the heat flow values varied from 14 to 27 mWm-2 with an average of 19mWm-2 and SD of 3.4. The TC values varied from 2.95 to 4.11 with a mean of 3.49mWK-1 with a SD of 0.4 while the porosity values varied from 0.21-1.15% with a mean of 0.62% with SD of 0.39. The density values varied from 2.68 to 2.85gcm-3 with a mean of 2.76gcm-3 and SD of 0.067. The surface temperature of the spring varied from 32 to 45°C with a mean of 38.9°C.
From these results the average RHP and HF values estimated from all samples was below the 4µWm-3 and 100mWm-2 recommended value of heat to be considered for economic importance. Thus, the IKGWS geothermal field cannot be explored for power generation but for other geothermal activities and may be classified as a low enthalpy geothermal system (
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