Determination of some Physical Parameters of Olumo Rock, Abeokuta Ogun-state, Nigeria
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| Title | Determination of some Physical Parameters of Olumo Rock, Abeokuta Ogun-state, Nigeria |
| Authors | |
| Abstract | The physical parameters of Olumo rocks namely, radiogenic heat, age of the rock, density and average absorbed dose rate were determined. The radioactive concentrations were also determined using gamma-ray spectrometry. The three natural radio nuclides examined in the rock samples were namely 40K, 238U and 232Th. The average radioactive concentration in each of the radionuclides were 961.49 BqKg-1, 9.57 BqKg-1 and 112.38 BqKg-1 respectively. The average absorbed dose rate was 0.059 ± 0.0043 µGh-1 similar to the world´s average absorbed dose rate of 0.059 ± 0.0l2 µGh-1 as recommended for normal environment by UNSCEAR. The highest radiogenic heat was found in 40K with 93.37% of the total. Furthermore, the approximate age of Olumo rock, as per the activity concentration, was found to be 4.94 x 109 years. The average density was found to be 0,729 kgm-3. |
| Publisher | Indian Society for Education and Environment (ISEE) |
| Date | 2009-07-01 |
| Source | Indian Journal of Science and Technology Volume 2, Issue 7, July 2009 |