Radionuclide Content and Radiation Dose Rates of Uraniferous and Mineralized Granites at GV Occurrence in Gabal Gattar, Northeastern Desert, Egypt.

Abstract G. Gattar is located in the northern part of Eastern Desert Egypt, bounded by latitudes 26° 52´ - 27° 08´ N and longitudes 33° 13´ – 26´ E covers an area about 178 km2. Eighteen samples, nine from uraniferous mineralized granites were measured radiometrically for 238U, 232Th, 226RaeU 40K determination Na-I detector radioactive minerals identified alpha track method. Based on petrography, mineral content radioactivity, Gattarian classified into granites. Uranium contents reach up to 229 ppm 20300 granites, which extremely higher than international limits. eTh/eU ratio studied show average ratios 0.05 0.0044, respectively, lower igneous rocks, suggesting uranium enrichment reducing conditions. The U/Th are 62.23 4234.45, indicating that two granitic types considered highly productive rocks. radioelements interrelations manifest distribution not only magmatic but also related hydrothermal redistribution radionuclides associating with deposition. radiological hazard parameters, such as dose rate (D), annual effective equivalent (AEDE), radium activity (Raeq), external (Hex), internal (Hin) indices gamma index (Iγ) estimated these compared levels. Nearly, all samples a great extent recommended permissible levels environmental parameters.