TY - JOUR ID - 149488 TI - Evaluation of geothermal energy potential of parts of the Middle Be-nue trough Nigeria: aeromagnetic and aeroradiometric approach JO - مجله ژئوفیزیک ایران JA - IJG LA - fa SN - 2008-0336 AU - Bemsen, Ikumbur Emmanuel AU - Onwuemesi, Godwin AU - Kenechukwu, Anakwuba Emmanuel AU - Ifeanyi, Chinwuko Augustine AU - Ojonugwa, Usman Ayatu AD - Assistant Professor, Department of Geology, Benue State Polytechnic, Ugbokolo, Nigeria AD - Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Nigeria AD - Professor, Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Nigeria AD - Associate Professor, Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Nigeria AD - Assistant Professor, Department of Applied Geophysics, Faculty of Physical Sciences Alex Ekwueme Federal University, Ndufu-Alike, Ikwo, Nigeria Y1 - 2023 PY - 2023 VL - 16 IS - 4 SP - 37 EP - 52 KW - Curie depth KW - Geothermal Energy KW - geothermal heat KW - radiometric heat KW - Spectral analysis DO - 10.30499/ijg.2022.295242.1343 N2 - Geothermal energy potential investigation over parts of Middle Benue Trough, Nigeria, has been evaluated using aeromagnetic and aeroradiometric datasets. The input data consists of nine aeromagnetic and aeroradiometric sheets, respectively. The aeromagnetic data was assembled and digitized; this produces a total magnetic intensity anomalous map (TMI). Similarly, the radiometric data were contoured to produce maps for the three radiometric elements of K, Th, and U. The rose diagram showed that the structural trend in the study area is trending NE-SW and the minor ones are trending E-W and NNE-SSW directions. The radiometric heat model reveals areas of high and low geothermal gradient. The results of quantitative interpretation reveal that the depth to anomalous magnetic sources (the sedimentary infilling) ranges between 0.76 and 4.46 km; while the depth to centroid ranges between 7.29-19.6 km. The Curie point depth (CPD) corresponds to the depth to the bottom of the anomalous magnetic source. The CPD varies from 12.70-37.22 km, the geothermal gradient varies between 15.58-45.670C/km, and the geothermal heat flow varies from 38.9-114.17 mW/m2. The two dimensional structural models show uplifted crust and mantle in some areas due to magmatic intrusions, which gave rise to low CPDs (12 to 28 km), which resulted in high geothermal heat flow values (60 to 115 mW/m2). The geothermal heat flow values around Kwolla, Shendam, Lafia, Akiri, Ibi, and Wukari South fall between 60 and 100 mW/m2, which is the suitable standard for geothermal potentiality.   UR - https://www.ijgeophysics.ir/article_149488.html L1 - https://www.ijgeophysics.ir/article_149488_c18df0fb0a02209914ed6b12096cca93.pdf ER -