Applied Geophysics
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Applied Geophysics
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Item ANALYSIS AND DESRIPTION OF THREESTAGES HEAR TREATMENT REQUIRED IN THE FIBRICATION OF ADJUSTABLE DIE(THREAD CUTTING TOOL)USING HIGH CARBON STEEL(AFRICAN JOURNAL O ENGINEERING RESERACH AND DEVELOPMENT, 2008) ADETONA, Adebayo AbbassThe work sample high grade carbon steel for annealing before machining it into a cutting tool the resultant tool was quenched in red oil from a temperature of 800 degrees centigrade to room temperature and was tested for work abilityItem Geoelectrical Investigation of Groundwater Potential, at Bosso Campus, Minna, Niger State, Nigeria(Science Publoshing Group, 2019) ADETONA, Adebayo AbbassAbstract: Geoelectrical investigation of groundwater potential has been carried out at Bosso Staff Quarters Bosso campus, Federal university of Technology, Minna. The area is situated on latitude 90 38’55.8”N and 90 39’29.0”N and longitude 6031’19.7”E and 6031’46.7”E. the survey was carried out with the aim of delineating the potential area for groundwater development and depth to the groundwater within the study area. The Schlumbeger array was used to sound six profiles with a total of 36 Vertical Electrical Sounding (VES) points. The sounding interpretation results were used to generate geoelectric section. The orresponding geologic section were also generated which revealed the existence of three subsurface layers. These layers revealed the existence of three subsurface layers. These layers comprise the top soil, weathered/fractured basement and fresh basement. The results of this analysis are presented as curves of apparent resistivity versus depth, from the digitalized curves obtained from the IP2WIN software, sulfur 11 was used to generates iso-resistivity map at different depth. The analysis of results shows that the area is not appropriate for borehole drilling.Item Interpreting the magnetic signatures and radiometric indicators within Kogi State, Nigeria for economic resources(ELSEVIER, 2022) ADETONA, Adebayo AbbassThe mineral and geothermal potentials of part of Kogi State was investigated through the interpretation of aeromagnetic and radiometric data of the study area. The analysis targeted bridging the gap of insufficient geophysical information of sub-crustal resources that could be of economic value within the area of study. Vertical derivatives, analytical signal and spectral depth analysis were used for the interpretation of the aeromagnetic data while the concentration and ternary images of the three radiogenic elements were used for the interpretation of the radiometric data. The result of first vertical derivative was helpful in delineating mineral potent lineaments labelled F1 to F8. The lineaments were seen trending E-W and NE-SW direction. A principal fault line F6 tends to separate the regions of sediments to the south-east and basement geologic formations to the south-western regions. Result of the analytical signal amplitude revealed regions with shallow intrusive magnetic rocks having high amplitudes ranging from 0.152 to 0.557 nT/m, while regions with magnetic rock intruding into sedimentary formations at greater depths, have medium to low amplitudes ranging from 0.014 to 0.136 nT/m. Regions delineated to be altered through hydrothermal process coincided with areas of major magnetic lineaments. The lineaments which could be fractures, faults or shear zones usually serve as conduits for mineral deposits during hydrothermal process. Result of potassium_thorium ratio map showed evidence of hydrothermal alteration in the NW and SW regions of study area. These regions of alterations also corresponds to regions where major lineaments were mapped and thus represent regions with significant potency for mineralisation. Result of spectral depth analysis on the aeromagnetic data showed that peak values of geothermal gradient and Heat flow were 27°C/km and 68 mW/m2, respectively, the values were recorded at the North-eastern part of study area, at the lower end of Koton-Karfe and part of Lokoja where the shallowest Curie point depth of 24 km also occurred. The estimated values of heat flow falls below the range of 80 to 100 mW/m2 recommended as threshold for a good source of geothermal energy, hence the region will not be prospectively good for a cost effective geothermal energy exploration. In order to assess the heat production within the study area due to activities of radioelements, a comparative analysis of the concentration of the three radiogenic elements was carried out. A relatively high radiogenic heat production (RHP) value of 3.4 µW/m3 was recorded at the North-western region indicating high occurrence of radioactivity within the granitic rocks. The (RHP) value of 3.4 µW/m3 is slightly below 4.0 µW/m3 which is a recommended value for a good source of geothermal energy. Graphical abstractItem Effect of High Concentration of Equivalent Thorium (eTh) And Uranium (eU) Within Part of North Central Nigeria on Geothermal Parameters(2024) ADETONA, Adebayo AbbassA 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