INTEGRATION OF GEOLOGICAL AND AIRBORNE GAMMA - SPECTROMETRIC DATA TO LOCATE URANIFEROUS ZONE BOUNDARIES OF WADI SHAIT AREA, SOUTH EASTERN DESERT, EGYPT

Wadi Shait area is located at the southern part of the Egyptian Eastern Desert, about 160 km southwest of Mersa Alam. This area comprises a diversity of igneous, metamorphic and sedimentary rocks, ranging in age from Precambrian to Quaternary. It is enclosed between latitudes 24º 27/& 24º 50 / N, and longitudes 33º 45 / & 34º 00 / E. The area has been systematically surveyed by the Aero-service division of the Western Geophysical Company of America in 1984.
The present study deals with the integration between the aerospectrometric and the geologic data essentially to identify the significant aerospectrometric zones of anomalously high (U), (Th) and (K) concentrations. Their delineation is based on the techniques of computation of the uranium favourability index (U2), the three-elemental effective parameter (F) and the corroboration factor( C ) . The U2- index, F- parameter and C- factor oscillate between 0.796 and 5.89 for U2, between 0.085 and 0.59 for F- parameter and between 13.69 and 23.21 for C- factor.
Investigation of the possibilities of identifying areas where uranium migration took place has been performed, as well as to the delineation of the degree of such migration. The estimated contents of eU (ppm), eTh (ppm), K% and eU/eTh
ratio in the different rock types in the area were used in this study.
The study revealed that Younger granites and Dokhan volcanics have the highest migration rates (5.96 % and 2.36 %, respectively) while the Nubia complex (knb3) has the lowest migration rate. ( knb1 ) shows the highest uranium deposition rate ( 2.36 % ).