المجلة الدولية للعلوم والتقنية

Due to the economic importance of carbonatite rocks in terms of the presence of rare elements such as uranium and thorium, there are 527 known carbonatite sites around the world including sites R33 and R34A. Both of these sites are located on the eastern edge of the Kufra Basin in the AL-Uwaynat area, south east Libya. Through the ground survey of carbonatite complex, R33 and R34A that located at the eastern edge of the Kufra basin AL- Uwaynat area. The several radioactive anomalies of uranium and thorium were detected. Where we found the highest value for the uranium in the carbonatite rock R33 120 ppm and the lowest value is 40PPM while the highest value of R34 is 240PPM and the lowest was 70PPM . By the study Gamma ray log of the well CH7 the highest value is 730 C.P.S at depth 130m.Through the magnetic survey, the relationship was found between the radioactive anomalies and the magnetic anomalies. Keywords: Radioactive survey, Magnetic survey, Carbonatite, Uranium, Gamma ray log.