ALBERT

Description: Both aeromagnetic and radiometric data was deployed to evaluate the Curie point depth and radiogenic heat production (RHP) of the young granitic regions of Jos plateau. An area of 55 by 110 square kilometers bounded by latitude 9°30' to 10°00' N and longitude 8°30' to 9°30' E of central Nigeria. The magnetic data was subjected to spectral analysis to obtain the curie depth which was subsequently used to evaluate the geothermal gradient and Heat flow for the area. Also, the concentration of radioelements (Potassium, thorium and Uranium) and average density of the in-situ rock was used to estimate the radiogenic heat production at each point where the Curie point was evaluated. The heat flow of the study area ranges from 10 to 165.5 mW/m2 with an average value of 111.00 mW/m2. The regions with anomalous heat flow of 165.5 mW/m2 are around Bowon Dodo, Dan Tsofo, Kadunu, Gimi, Kaura and Zankan of plateau state. The geothermal gradient values range from 5 to 68 °C/Km with an average of 26.16 °C/Km. The radiometric data analysis resulted in radiogenic heat values ranging from 0.4 µWm3 to 6 µW/m3 with average radiogenic heat value of 3.36 µW/m3. Both analyses revealed that regions such as Ataka, Gimi, Jimjim and Pari could be explored for geothermal energy. The high concentration of uranium, thorium and potassium associated with the study area must have arisen from the weathered in-situ granitic basement rocks.