Programme: Industrial Physics
Permanent URI for this collectionhttp://itsupport.cu.edu.ng:4000/handle/123456789/28785
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Item Qualitative Analysis of Background Radiation from 238U, 232Th and 40K in Selected Locations in Ekiti State using Aeroradiometry Data(ICSSD 2024, 2025) Morakinyo, R. O; Usikalu, M. R.; Adagunodo, T. A.; Ojo, O. F.; Babarimisa, I. O.Airborne radiometric data collected from Nigeria Geological Survey Agency (NGSA) for selected locations of Ekiti State were analyzed using Oasis Montaj to measure the radionuclides content of the air at 500 m above the ground. The absorbed dose was consequently estimated from the radionuclides content measured in order to determine the possible radiation risk to the dwellers of the locations. The estimated activity concentration of 238U, 232Th and 40K ranges from 0.77-9.50 ppm, 3.49-52.84 ppm and 0.21-4.40% respectively. The radionuclides content was re-construe in Bq/kg using the relevant conversion factors and the values range from 9.49-117.36 Bq/kg, 14.17-214.51 and 65.33-1377.32 for 238U, 232Th and 40K accordingly. The qualitative analysis gave the value of the absorbed dose of 31.92-214.04 nGy/h. The ternary map indicates the relative abundance of 40K in the study area.Item Assessment of sustainable geothermal potential in Patigi region, North-Central Nigeria(ICSAEES-2024, Lagos, Nigeria, 2024) Salaudeen, S. A.; Adagunodo, T. A.; Sunmonu , L. A.; Suleman, K. O.; Ayanbisi, O. W.; Oladapo, O. F.Item Geophysical Investigation of the Subsurface Structural Competency Around College of Computing and Communication Studies, Bowen University, Iwo, Osun State, South West Nigeria(INTERNATIONAL JOURNAL OF RESEARCH AND INNOVATION IN APPLIED SCIENCE (IJRIAS), 2024) Kolawole, T.; Ajani. O. O.; Adeniji, A. A.; Aweda, F. O.; Adagunodo, T. A.Mapping of the subsurface structures within the environment is highly essential in engineering site characterization. The subsurface structure around the college of computing and communication studies, Bowen University Nigeria was studied using the very low frequency electromagnetic (VLF-EM) and the geo-electrical resistivity method. This was aimed with a view to investigate the weak and competent geological zones. In this study, five traverses were generated for both the VLF-EM and geoelectrical resistivity method, using the VLF-EM 16 equipment and OHMMEGA-Terrameter respectively. The results of the VLF-EM revealed the presence of positive and negative anomalies responses. The positive anomalies indicate the weak zones, which may be caused by geological structures such as faults/fractures, and contacts between rocks and the negative anomalies indicate the competent zones, which may be due to hard rock/laterite. The geo-electrical resistivity results revealed the vertical and lateral inverted resistivity values of the subsurface structure. The result revealed four layers such as top soil, weathered layer, fractured and fresh basement. From both the interpreted results, the weak/fractured zones mapped in the basement are points of interest in this research. The results of the investigation revealed that the probable cause(s) of the structural failures within the study area are evidence of geological features mapped as fracture and clayey formation that is present in the study area. Therefore, in order to evade future structural problems and minimize capitals used in restoring distressed structures in the University, a geophysicist services should be engaged for pre-foundation studies, which will act as a guide before and during construction.Item Qualitative Analysis of Background Radiation from 238U, 232Th and 40K in Selected Locations in Ekiti State using Aeroradiometry Data(ICSSD 2024, 2025) Morakinyo, R. O.; Usikalu, M. R.; Adagunodo, T. A.; Ojo, O. F.; Babarimisa, I. O.Airborne radiometric data collected from Nigeria Geological Survey Agency (NGSA) for selected locations of Ekiti State were analyzed using Oasis Montaj to measure the radionuclides content of the air at 500 m above the ground. The absorbed dose was consequently estimated from the radionuclides content measured in order to determine the possible radiation risk to the dwellers of the locations. The estimated activity concentration of 238U, 232Th and 40K ranges from 0.77-9.50 ppm, 3.49-52.84 ppm and 0.21-4.40% respectively. The radionuclides content was re-construe in Bq/kg using the relevant conversion factors and the values range from 9.49-117.36 Bq/kg, 14.17-214.51 and 65.33-1377.32 for 238U, 232Th and 40K accordingly. The qualitative analysis gave the value of the absorbed dose of 31.92-214.04 nGy/h. The ternary map indicates the relative abundance of 40K in the study area.Item Application of VLF-EM response and geoelectrical sounding in groundwater investigation around an active dumpsite(Application of VLF-EM response and geoelectrical sounding in groundwater investigation around an active dumpsite, 2024) Adeniji, A. A.; Ajani, O. O.; Adagunodo, T. A.An integrated geophysical method combining very low frequency electromagnetic (VLF-EM) and vertical electrical sounding (VES) methods were carried out around Adaland, Southwestern Nigeria, located within latitude 70 54' 0" and longitude 40 43' 0", with a view to investigate the possible impact of dumpsite on groundwater.This is the major study in the environment to offer extensive evidence regarding the suitability of obtaining quality groundwater. In this research, eight VLF-EM and twelve VES data sets were generated, which were then used to estimate the linear structure, bedrock formation, subsurface geological characteristics, and identification of leachate pathways. The VLF-EM data were analyzed by employing Karous_Hjelt and Microsoft Excel, while the VES data were investigated using the WinRESIST software. TheVLF-EM results confirmed the presence of conductive zones, which might be due to fracture, fault and contact zones or weathered basements. The lithological units acquired from the electrical resistivity results revealed four geoelectrical layers such as topsoil, weathered-based, fractured basement and fresh basement. However, the identified weathered layers and fractured basements from the geoelectrical sections and the corresponding Karous and Hjelt (K-H) pseudo sectionresults around the dumpsite, constitute the main passages for the possible impact of the open dumpsite on groundwater quality, since leachates from the dumpsite could slowly percolate downwards from the topsoil to the water table. Therefore, the impact of the dumpsite on the groundwater is caused by the inadequate clay materials, near-surface features such as fractures/faults, and lateral in-homogeneity. Thus, integrating both methods has been recommended in site characterization for accessing quality groundwater around a dumpsite environment.Item Delineation of structural lineaments of Shaki West Southwestern Nigeria using high resolution aeromagnetic data(Journal of the Nigerian Society of Physical Sciences, 2025) Adedokun, O. M.; Oladejo, O. P.; Alao, K. N.; Adeniyi, E. O.; Otobrise, H.; Suleman, K. O.; Adagunodo, T. A.; Adedokun, O.; Sunmonu, L. A.Aminor earthquake, known as earth tremor, often occurs in areas prone to seismic activity. However, there is a notable gap in knowledge about earth tremors, with little documentation conducted before 1987, but a series of notable events between 1990 and 2000 prompted researchers to delve deeper into the study of earth tremors in Nigeria. Therefore, this study is aimed at delineating the structural lineaments of Shaki West Southwestern Nigeria using High Resolution Aeromagnetic Data (HRAD) to identify the underlying basement geology and define the structural framework of the study area. The study area’s aeromagnetic data of Shaki (Sheet 199) underwent processing and interpretation using Oasis Montaj software to assess basement configuration and structural integrity. The data were further enhanced using the Total Horizontal Derivative (THDR) in order to determine the orientations of the lineaments in the study area. The orientations of the lineaments obtained from THDR map revealed that the Pan African orogeny constitutes 52%; Kibaran orogeny constitutes 31%, while Liberian orogeny constitutes 17% lineaments in the study area. The upward continuation maps suggest the presence of faults at the depth range of 2.0-2.25 km. The overall depth to magnetic sources of the area is relatively shallow compared to sedimentary basement area. Based on orientation of faults on magnetic fault map obtained from the superposition of the lineaments extracted from THDR map on the geological map of the study area, three distinct set of sinistral /dextral faults were recognized in Shaki west local government area which includes: E-W, NE-SW and NW-SE fault trend. This suggests that NE-SW and NE-SE fault-set could be responsible for the tremor experienced in Shaki west southwestern, Nigeria. It is concluded that the study area is not immune from experiencing occurrences of tremors from time to time