| Radionuclide content and radiation dose rates of uraniferous and mineralized granites at GV occurrence in Gabal Gattar, Northeastern desert, Egypt |
| Paper ID : 1049-ICEE (R2) |
| Authors: |
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Fatma Abdelwahab *1, Refat El Terb1, Nader Elgendy2, Moatz barakat3, Wael Wael1, Mostafa Saad3, Amira Mohammed El Tohamy Mohammed El Tohamy3, Mohamed Galal1 1Nuclear Material authority 2Nuclear Material Authorty 3Nuclear Material Authority |
| Abstract: |
| G. Gattar is located in the northern part of the Eastern Desert of Egypt and bounded by latitudes 26 52´ - 27 08´ N and longitudes 33 13´ – 33 26´ E and covers an area of about 178 km2. Eighteen samples, nine from uraniferous and nine form mineralized granites were measure radiometrically for 238U, 232Th, 226RaeU and 40K determination by Na-I detector anf the radioactive minerals identified by alpha track method. Based on the petrography, radioactive mineral content and radioactivity, Gattarian granites were classified into uraniferous granites. Uranium contents reach up to 229 ppm in the uraniferous granites and to 20300 ppm, which is extremely higher than the international limits. eTh/eU ratio of the studied uraniferous and mineralized granites show average ratios of 0.05 and 0.0044, respectively, which is extremely lower than the average of igneous rocks, suggesting uranium enrichment in reducing conditions. The uraniferous and mineralized granites U/Th ratios average are 62.23 and 4234.45, respectively, indicating that the studied two granitic types considered highly productive rocks. The radioelements interrelations manifest that the distribution of radioelemens not only magmatic but also related to hydrothermal redistribution of radionuclides with uranium deposition. The radiological hazard parameters, such as the dose rate (D), the annual effective dose equivalent (AEDE), radium equivalent activity (Raeq), external (Hex), internal (Hin) hazard indices and gamma index (Iγ) were estimated for these these and compared with the international levels. Nearly, all the studied samples are to a great extent higher than the recommended permissible levels for all environmental parameters. |
| Keywords: |
| Radionuclide, mineralized granites,Gabal Gattar |
| Status : Paper Accepted |
