[01] Isaac Oyewole Adegoke, Department of Physics and Engineering Physics, Obafemi Awolowo University, Ile-Ife, Nigeria. [02] Emmanuel Abiodun Ariyibi, Department of Physics and Engineering Physics, Obafemi Awolowo University, Ile-Ife, Nigeria. [03] Oluwaseyi Adeola Dasho, Department of Physical Sciences, Dominion University, Ibadan, Nigeria. [04] Adebiyi Samuel Adebayo, Department of Physics, University of Medical Science, Ondo, Nigeria. [05] Ayomide Oluyemi Olabode, Department of Physics and Engineering Physics, Obafemi Awolowo University, Ile-Ife, Nigeria.

This study analyzed measured ground and airborne magnetic data sets. These were with a view to providing information on the depth to basement rocks, the subsurface geologic layers, and essentially how these geologic structures serve as indicators for the occurrence of minerals and also its possible contribution/influence to the deposition and disposition of minerals in Itagunmodi town. The ground magnetic profiles from the ground magnetic data revealed a great deal of inhomogeneity in residual magnetic intensity values. The magnetic anomaly value ranged from -34.4 to +284.5 nT. The 2D subsurface images also revealed a deformed underlying rock. The minimum and maximum overburden thicknesses from the 2-D subsurface image were obtained as 5 m and 70 m respectively. The inferred structural map obtained from High-resolution aeromagnetic data of Ilesa area revealed some major and minor inferred faults. The lineament analysis of the inferred structures using the Rose diagram revealed two main tectonic episodes in the area. These were the NE-SW and the ENE-WSW structures among which the NE-SW trend dominates. Also, notable were the NNE-SSW trends and few E-W trends. The Ifewara and other major fault zones were delineated. Itagunmodi, the study area was observed to be associated with two minor faults that offset the Ifewara fault at about 30° and 45°. This suggested possible migration of minerals from the Ifewara fault into the deformed structures via the Itagunmodi area inferred faults over geological time.

Magnetic, Minerals, Lineament, Itagunmodi, Fault

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