Depth determination of the subsurface uranium deposits using CR-39 cylindrical technique in Gneissoic granitic rocks, Abu Rushied area, Southeastern Desert, Egypt

摘要

Using solid state nuclear track detectors and employing CR-39 cylindrical technique, the depth of the subsurface uranium deposits were determined. This techniques depends mainly on the nuclear track detector situated in zigzag form inside a polyethylene cylinder of 65?cm length and 7?cm diameter. This technique was applied on a borehole in a granite mass Abu Rushied area, southeast area desert. The obtained results revealed that, the depth of U -ore deposited reached about 89?m with thickness nearly 24?m. The obtained data for radon concentrations were also used for the determination of the exhalation rates, the measured values for exhalation rate (mBqm ?2 h ?1 ) varies between 6.14E-03 at h?=?50?cm and 4.53E-02 at h?=?10?cm, The obtained values are comparable with that recorded for the granite type of rock.