In this work, aeroradioactivity (airborne radiometric) data was used to characterize the lithology of Ijebu Ife, Southwest Nigeria. Measurements were made using Sodium Iodide [NaI (Tl)] detector mounted on a fixed-wing aircraft by Nigerian Geological Survey. Geochemical information on potassium (⁴⁰K), thorium (²³²Th) and uranium (²³⁸U) concentrations were extracted from the raw data after correction and normalization due to contributions from soil, atmosphere, aircraft and cosmic radiation. The data was further subjected to photogeological analysis and image-enhancing techniques using minimum curvature gridding with cell size of 25 m after which single band, ratio and ternary images were generated and used to characterize the lithology of the area. Six lithologies including granite lithology, shale lithology, sandstone lithology, Lekki lagoon lithology, schist and clay lithologies were characterized after combining the single band, ratio and ternary maps. Results of radiometric analysis showed the relative abundances of each radioelement concentration within each lithologic unit. ²³²Th had 16.33 ± 0.62 ppm as the highest mean value of radioelement abundance within the granite lithology with the range of 2.93–62.42 ppm. ⁴⁰K had the lowest mean concentration of 0.04 ± 0.00% within the Lekki lagoon lithology. These values reflected the overall average concentration and the nature of bedrock lithologies within their respective location of occurrence. This work showed the usefulness of aeroradioactivity data in the characterization of lithologies, environmental monitoring and assessment in terms of radiological distributions and radionuclide concentrations.

在这项工作中，使用了航空放射性（航空辐射测量）数据来表征尼日利亚西南部Ijebu Ife的岩性。尼日利亚地质调查局使用安装在固定翼飞机上的碘化钠[NaI（Tl）]检测器进行了测量。钾（⁴⁰ K），th （²³² Th）和铀（²³⁸）的地球化学信息由于土壤，大气，航空器和宇宙辐射的影响，经过校正和归一化后，从原始数据中提取了U）浓度。使用最小曲率栅格（单元大小为25 m）对数据进一步进行光地质分析和图像增强技术，之后生成单波段，比率和三元图像，并用于表征该地区的岩性。结合单波段图，比例图和三元图，对花岗岩岩性，页岩岩性，砂岩岩性，Lekki泻湖岩性，片岩和粘土岩性六种岩性进行了表征。辐射分析的结果显示了每个岩性单元内每种放射性元素浓度的相对丰度。²³²在花岗岩岩性中，Th的放射性元素丰度最高平均值为16.33±0.62 ppm，范围为2.93–62.42 ppm。在莱基泻湖岩性范围内，⁴⁰ K的最低平均浓度为0.04±0.00％。这些值反映了总体平均浓度和在各自发生位置内基岩岩性的性质。这项工作表明了放射性数据在岩性表征，环境监测和评估方面的有用性，包括放射性分布和放射性核素浓度。