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Abstract XXABSTRACT MAGDY ABLELLA TIF AFIFI GOUDA. Structural, lithological and metallogenic contribution to the Wadi Atalla-Wadi Abu-Ziran area, Central Eastern Desert, Egypt, using aerospectrometric and aeromagnetic survey data. A thesis submitted to Geophysics Department, Faculty of Science, Ain Shams University for the Degree of Doctor of Philosophy (Applied Geophysics), 1998. The present work is an attempt to utilize the airborne gamma-ray radiospectrometric and magnetic survey data-as the main sources of informationto come out with a consistent integrated interpretation concerning the identification and outlining of the probable radioactive provinces and their relation to the structural framework and surface lithology in the area of W Atalla-W. Abu-Ziran, Central Eastern Desert, Egypt. This could be obtained by searching for areas of anomalously high concentrations of uranium and/or thorium, which could be favourable sites for potential economic radioactive mineralized zones. The defining of significant radioactive anomalies has been performed by two ways. The first one is by calculation of the significant factor (threshold) of the aerospectrometric data for each interpreted radiometric lithologic (IRL) unit. The second way is by examining the stacked profiles for regions of high eU, eU/eTh and eU/K. Regional remapping of the outcropping basement complex was carried out through the application of factor analysis technique, using the provided seven aeroradiospectrometric variables. This would permit the elucidation and outlining of various IRL units and compute their characteristic statistics. Besides, the degree ofremobilization of uranium in each rock type is shown as reflected from the trend variations of uranium and thorium with their ratios. Furthermore, uranium favourability indices were calculated for the different IRL units in the study area. |