Geothermal Energy Potential of the Chad Basin, North-Eastern Nigeria
In this research paper, the sub-surface heat flow of a part of the Chad Basin, in North eastern Nigerian was estimated using spectral analysis. This was obtained from twenty (20) digitized High Resolution Aeromagnetic (HRAM) data sheet covering the study area. Regional-residual separation using firs...
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Veröffentlicht in: | Journal of Applied Sciences and Environmental Management 2019-02, Vol.22 (11), p.1817 |
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Sprache: | eng |
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Zusammenfassung: | In this research paper, the sub-surface heat flow of a part of the Chad
Basin, in North eastern Nigerian was estimated using spectral analysis.
This was obtained from twenty (20) digitized High Resolution
Aeromagnetic (HRAM) data sheet covering the study area.
Regional-residual separation using first order polynomial fitting
method with three coefficients was carried out on the data map before
the application of statistical spectral analysis. Result shows that the
centroid depth varies between 9.39 km and 18.31 km. The depth to the
Curie temperature isotherm varies between 15.14 km and 33.46 km below
the mean sea level. It was also found that the Curie temperature
isotherm within the basin is not a horizontal level surface but an
undulating surface with geothermal gradients and heat flow ranging
between 15.77 and 38.31°C/Km, and 39.41 and 95.77 mWm-2
respectively. Thus, the calculated average geothermal gradient and heat
flow for this area are 23.39°C/Km and 58.47 mWm-2 respectively.
Since average heat flow in thermally normal continental region is 60
mWm-2 and the values in excess of 80 mWm-2 - 100 mWm-2 are
associated with anomalous geothermal conditions, hence the study area
can generally be considered as a thermally normal region. But, the
northeastern part of the study area with values in excess of 80 mWm-2
is recommended for further investigation. |
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ISSN: | 1119-8362 2659-1502 2659-1499 |
DOI: | 10.4314/jasem.v22i11.17 |