Integrating Aeromagnetic and Resistivity Data for Geologic Interpretation of Igbeti Schist Belt, Southwestern Nigeria: Implication for Mineral Exploration

Abstract

To interpret the geologic features associated with the mineral occurrences in the Igbeti region of southwest Nigeria, which is confined by latitude 8⁰ 50^' N to 8⁰ 55^' N and longitude 4⁰ 15^' E to 4⁰20^' E, induced polarization techniques of electrical resistivity were integrated with high-resolution aeromagnetic data. Both datasets were processed and analyzed using various techniques to enhance interpretation. The resistivity data revealed anomalies whose resistivity values ranged from 0.05 to 284  and the chargeability values ranged from -3.89 to 5.77 mV/V indicating a great possibility of the presence of diamagnetic material associated with solid minerals. Depth to basement was established using source parameter imaging (SPI) and 3D Euler deconvolution methods. 3D Euler deconvolution produced depth results ranging from <10 m (shallow) to >30 m (deep). Additionally, shallow to deep magnetic sources with a range of 168.4 m to 679.1 m are seen according to the SPI depth estimate.