Global Journal of Earth and Environmental Science

The study area (Ogotun, Ikeji-Ile and Ipetu) belongs to the southeastern part of Ilesha schist belt, widely acclaimed as hosts to metallic mineralization and associated ore deposits. There is paucity of information on the geological and structural settings as well as mineralization history of the study area. Hence, the need for this research, to provide necessary geological information as well as reliable clues to its mineralization potentials. A Sentinel-2A Imagery of the study area was acquired and digitally processed to constitute the remotely-sensed data, followed by automatic extraction of lineaments using Envi 5.0, Geomatical, Arc Gis 10.3 and Rockwork software to generate the required lineaments, lineament density as well as the mineralogical maps of the study area. Thirty-two rock samples were systematically picked during field examination, while fifteen of the samples were carefully selected for petrographic analysis under transmitted light microscope for its mineralogical composition. Remote sensing results revealed paucity of lineaments in the study area due to the ductile nature of the rocks. Also, the major lineaments trend in the NE-SW direction while the subsidiary ones in the E-W direction has been modified by several deformation episodes. The mineralogical map from remote sensing indicated the presence of FeS2 which is an indication of iron sulphide mineralization due to supergene enrichment, while areas with higher lineaments densities were discovered not to host any mineralization because their geometrics have been destroyed by subsequent deformations. Hence, lithologic control of mineralization is confirmed. The five rocks samples whose thin sections earlier revealed opaque minerals under transmitted light were prepared for ore microscopic study and the result also confirmed the presence of chalcopyrite (CuFeS2) which is majorly hosted by the quartz-schists. Conclusively, the presence of FeS2 and chalcopyrite indicate the possibility of other ore minerals which may be present but not detected.