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ژئوفیزیک ایران، جلد ۱۶، شماره ۴، صفحات ۳۷-۵۲
عنوان فارسی Evaluation of geothermal energy potential of parts of the Middle Be-nue trough Nigeria: aeromagnetic and aeroradiometric approach
چکیده فارسی مقاله 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.  
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Evaluation of geothermal energy potential of parts of the Middle Be-nue trough Nigeria: aeromagnetic and aeroradiometric approach
چکیده انگلیسی مقاله 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.  
کلیدواژه‌های انگلیسی مقاله Curie depth, Geothermal Energy, geothermal heat, radiometric heat, Spectral analysis
نویسندگان مقاله Ikumbur Emmanuel Bemsen |
Assistant Professor, Department of Geology, Benue State Polytechnic, Ugbokolo, Nigeria

Godwin Onwuemesi |
Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Nigeria

Anakwuba Emmanuel Kenechukwu |
Professor, Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Nigeria

Chinwuko Augustine Ifeanyi |
Associate Professor, Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Nigeria

Usman Ayatu Ojonugwa |
Assistant Professor, Department of Applied Geophysics, Faculty of Physical Sciences Alex Ekwueme Federal University, Ndufu-Alike, Ikwo, Nigeria

نشانی اینترنتی https://www.ijgeophysics.ir/article_149488_c18df0fb0a02209914ed6b12096cca93.pdf
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