13 Bull. Min. Res. Exp. (2021) 165: 13-30 Keywords: Lineament, Rose Diagram, Magnetic Sources, Curie Isotherm, Thermal Properties. Received Date: 16.04.2020 Accepted Date: 17.09.2020 ABSTRACT Thermomagnetic properties and geothermal energy potential in parts of Bida Basin, Nigeria have been evaluated using spectral analysis of integrated nine aeromagnetic data. The study area covering 27.225 km 2 of aeromagnetic data was examined and construed in order to delineate the thermal properties of the country-rock in the area. The result of the visual inception of the residual map reveals that the area comprises an extremely irregular pattern of magnetic intensities that range from 220 to 240 nT. Two structural features of folding evidence were also delineated in the area namely; uplift and depression. The result of the lineament structures from the shaded relief map and Rose diagram depicts NE-SW as the major trend with the minor trend is NW - SE. Two depths to magnetic sources were distinguished in the area: the shallower bodies which vary from 1.27 to 1.96 km and the deeper bodies that vary from 2.01 to 4.27 km. The result also shows an average depth to the centroid as 12.97 km in the area. The thermomagnetic properties analysis show average values of 23.12 km Curie isotherm, 25.27 °C/km geothermal gradients and 63.17 mWm 2 heat fow in the area. The study concludes that the study area possesses good potential quality for geothermal energy generation and exploration. Evaluation of thermomagnetic properties and geothermal energy potential in parts of Bida Basin, Nigeria, using spectral analysis Churchill Chukwunonso OKONKWO a* , Augustine Ifeanyi CHINWUKO b , Ajana Godwin ONWUEMESI b , Emmanuel Kenechukwu ANAKWUBA b , Sunday Okechukwu OKEKE a and Ayatu Ojonugwa USMAN c a Federal College of Education Umunze, Department of Physics, Nigeria b Nnamdi Azikiwe University, Department of Geological Sciences, Awka, Nigeria c Alex Ekwueme Federal University, Department of Physics / Geology / Geophysics, Ndufu - Alike, Ebonyi, Nigeria Research Article Citation Info: Okonkwo, C. C., Chinwuko, A. I., Onwuemesi, A. G., Anakwuba, E. K., Okeke, S. O., Usman, A. O. 2021. Evaluation of thermomagnetic properties and geothermal energy potential in parts of Bida Basin, Nigeria, using spectral analysis. Bulletin of the Mineral Research and Exploration 165, 13-30. https://doi.org/10.19111/bulletinofmre.796381 *Corresponding author: Churchill Chukwunonso OKONKWO, chukschurchill@yahoo.com http://bulletin.mta.gov.tr BULLETIN OF THE MINERAL RESEARCH AND EXPLORATION CONTENTS Foreign Edition 2021 165 ISSN : 0026-4563 E-ISSN : 2651-3048 Bulletin of the Mineral Research and Exploration 1. Introduction The major problem threatening the Nigerian economic space is the epileptic power supply situation in the country and gap in accessing information on alternative energy resources. The capacity of Nigeria to adequately cater for the energy demands of its ever growing population is seriously inadequate if further effort is not invested in the search for renewable, sustainable and cleaner energy resources capable of meeting this growing demand. Therefore, there is great need to investigate and harness the geothermal energy potentials for satisfaction of the nations energy needs especially around the felds of lighting, transportation, communication and others. Accordingly, recent researches have shown that the geothermal energy sources are viable in those regions that were underlain by basement rocks, which comprises metamorphic and igneous rocks that were formed from the interior part of the earth (Chukwu et al., 2017; Abraham et al., 2014; Anakwuba and Chinwuko, 2015). Surprisingly, two-third of Nigeria