Browsing by Author "Ekhaguere, Osagie A."

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    Evaluating the groundwater potential of coastal aquifer using geoelectrical resistivity survey and porosity estimation: A case in Ota, SW Nigeria
    (ScienceDirect, 2020) Oyesomi, Kehinde; Aizebeokhai, Ahzegbobor P.; Metwaly, Mohamed; Oladunjoye, Michael A.; Bayo-Solarin, BabaMayowa A.; Sanuade, Oluseun A.; Thompson, Cherish E.; Ajayi, Francis S.; Ekhaguere, Osagie A.
    Geoelectrical resistivity sounding surveys was carried out at two locations (A and B) in the new CanaanCity residential estate of Canaan land Ota, Ogun state in order to locate possible targets for groundwater explorations. A total of twelve (12) vertical electrical soundings were conducted using the Schlumberger array configuration. The interpretations of the VES curves revealed five to six geoelectrical layers at location A which comprises VES1-7. The geoelectric units consist of the topsoil, sandy clay, lateritic clay, confining bed (clayey sand), and main aquifer (sand). The top of the aquifer in this part of the study area is between 40 m and 83.5 m. Likewise, a total of five to seven layers of geoelectrical units were delineated at the location B portion of the study site (VES 8–12) similar to location A with an addition of the shale unit that was interpreted to be that of the Akimbo Formation of the Dahomey Basin. The depth to the top of the productive aquifer within location B is in the range of 40–112.4 m. The delineated basal shale layer is impermeable, serving as the base seal rock for the confined aquifer system. The estimated porosity values range from 28% to 74%, indicating that the highly porous aquifer system in the area is the coastal plain sands mixed with the alluvium sand of the Benin Formation of Dahomey Basin. The study revealed the complexity of the productive aquifer system in the area and its undulating topography
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    Identification of Gold targets using airborne geophysics and remote sensing data in part of northcentral Nigeria
    (Elsevier Inc., 2025) Oyesomi, Kehinde D.; Fadeyi, Solape S.; Adigun, Akeem; Ekhaguere, Osagie A.; Metwaly, Mohamed
    The exploration and utilization of economic mineral deposits are of paramount importance in driving the prosperity and progress of nations across the globe. An integrative approach of integrating aeromagnetic, airborne-radiometric, and remote-sensing methods was employed to assess gold mineralization zones within Paiko town in Niger state, northcentral Nigeria. Airborne-radiometric and remote-sensing datasets were utilized to map subsurface structures, lithological units, and hydrothermal alteration zones. The investigation delineated three major tectonic events along different directions: the ENE-WSW (D1) trending tectonic event, the WNW-ESE (D2) trending tectonic event, and NW-SE (D3) trending structural deformation event. The three deformation phases signify unique magnetic unit boundaries, lithological contacts, veins, and veinlets intrusions. These structures were interpreted as potential pathways for mineralization fluids. Moreover, the presence of high potassium-rich zones with low thorium/potassium ratio anomalies indicated potassium enrichments associated with sericite mica and K-feldspar minerals. The study also mapped various alterations of ferrous silicates, holding the potential to host gold and copper deposits, as well as endoskarn, epidot/chlorite/amphibole alterations, and phyllic minerals. Depth estimates derived from magnetic source parameters imaging techniques revealed that the mineralization targets in the area are relatively shallow, with depths ranging from the near-surface to less than 100 m. The delineation of mineralization zones in the study area convincingly demonstrates the effectiveness of integrating airborne geophysical and remote sensing data for exploring, developing, and managing subsurface mineral resources. This approach provides valuable insights into gold mineralization’s presence, distribution, and characteristics, facilitating informed decision-making in mineral resource exploration and utilization.