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 petrograph...