Journal de géologie et géophysique
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Geological Controls Affecting on Radon Gas Concentrations in Granitic Gneiss at Wadi Abu Rushied, Southeastern Desert, Egypt

MAM Mahmoud

The radon (222Rn) is a natural radioactive gas produced by the radioactive decay of 238U. Geology is the most important factor controlling the source and distribution of radon gas in Abu Rushied area. Field and lap techniques for radon gas concentrations are established by CR-39 detector. In the field, Radon gas concentrations is ranged from 138.72 to 2610.09 with an average 802.7522 (Bq/m3) while, it ranged from 44354 to 1485 with average 8869 (Bq/m3) in the lap. The activity concentration of Ra-226, Radon mass and surface exhalation rate and annual absorbed dose equivalent were measured. The main geological and geochemical factors with moderate to high radon areas are described in 3D maps. The most analyzed trace elements of the studied granitic gneiss show positive correlation with Uranium content, indicating a strong relation between these elements and their U-bearing minerals. The highest radon gas concentrations in Abu Rushied area are associated with U�?�rich. Elevated radon gas in the studied area is also increase with the fractures and other tectonic events which play a role in radon emanation.