Abstract
This work presents the interpretation of the aeromagnetic data over Soko and Ankpa area using spectral analysis method. The study area was divided into eight (8) equal spectral blocks in order to estimate the depth to the top boundary, centroid, Curie point depth, heat flow and geothermal gradient of the study area. The result of the analysis shows the range of the depths to the top boundary and centroid varies between 1.085 to 1.984 km and 6.151 to 8.730 km respectively. The Curie temperature isotherm ranges between 11.112 km and 15.476 km and the geothermal gradients associated with it ranges from 39.967 and 52.196 0 𝐶⁄𝑘𝑚. The corresponding values of heat flow ranges from 93.697 𝑚𝑊𝑚 and 130. 49 𝑚𝑊𝑚. From this analysis, it was observed that areas with high geothermal gradient correspond to high heat flow and an inverse relationship exists between the heat flow and the Curie point depth. With the high geothermal gradient especially at the southeastern part of the study area, there is a possibility of enough geothermal energy for exploration in order to boost and generate clean energy for electricity.
Highlights
Developed and developing countries have successfully used geothermal energy in generation of electricity to meet the rapid growth in demand for electricity to power industries and households across the world
This paper focuses on Ankpa and Soko area for the purpose of investigating the geothermal potential of the study area
In performing the spectral analysis, the first stage is to estimate the depth to the centroid (Zo) and depth to the top boundary (Zt) of the magnetic source from the gradient of the graph of logarithm of energy against frequency that is given by equation 1; logE
Summary
Developed and developing countries have successfully used geothermal energy in generation of electricity to meet the rapid growth in demand for electricity to power industries and households across the world. Geothermal energy is consider to be one of the most clean energy source and has appealed the growing attention worldwide (Okorie et al, 2019). It has several advantages over fossil fuels of having clean, large reserves and environmentally friendly (Croteau and Gosselin, 2015). In long term vision for providing reliable and renewable environmental-friendly sources of energy for Nigeria, the importance of geothermal energy can never be over emphasize. This paper focuses on Ankpa and Soko area for the purpose of investigating the geothermal potential of the study area
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