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Assessment of the Elemental Concentration of Potassium, Uranium and Thorium with their Associated Radiogenic Heat Production in Granite Rocks of Southwestern Nigeria |
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PP: 205-210 |
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doi:10.18576/jrna/050307
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Author(s) |
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S. T. Gbenu,
S. F. Olukotun,
O. F. Oladejo,
C. A. Onumejor,
F. O. Balogun,
F. I. Ibitoye,
M. K. Fasasi,
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Abstract |
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| Radiogenic heat production (RHP) was evaluated from the elemental concentrations of Potassium (K), Thorium (Th) and Uranium (U) in granite rocks of southwest Nigeria using gamma ray spectrometry. The mean K, Th and U values of 2.71%, 30.57 ppm and 3.02 ppm, respectively were obtained for the entire study area. The abundance ratios (K/Th, K/U, Th/U) were calculated in order to study the enrichment/depletion processes in the granite rocks of the sub region. A mean value of 3.14µWm-3obtained for the RHP is comparable to the world average value of 3µWm-3 for granite rocks and the abundance ratios indicates a depletion of uranium from its ore. All variables were subjected to multivariate statistical analysis to determine the various relationships that exist among them. Principal component analysis (PCA) yields a three component representation of the acquired data in which 91.2% of the total variance was explained.
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