Spots of high radioactive anomalies were recorded in the ferruginous sandstone of the upper part of the Adedia and the lower member of Um Bogma formations at Wadi El Sahu, Sinai, Egypt. Two types of samples from Wadi El Sahu were considered, rock samples from the high radioactive ferruginous sandstone of the Adedia Formation and the lower member of Um Bogma formations and soil samples (stream sediments) from Wadi El Sahu deposits to measure the natural radiation from 238U, 226Ra, 232Th and 40K using gamma-ray spectrometry. The absorbed dose rates in air (D) obtained from the specific activities of 226Ra, 232Th and 40K were calculated consequently; annual effective dose (AEDout) and excess lifetime cancer risk (ELCR) were calculated. The results illustrated that values of 238U, 226Ra, 232Th and 40K for soil samples are much lower than the corresponding values of the mother rock. The remobilisation parameter and the difference between chemically and radiometrically measured uranium confirm uranium migration in the studied rocks.
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Taha et al. (2020) studied this question.
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