INTERPRETATION OF AIRBORNE RADIOMETRIC AND MAGNETIC DATA IN THE WADI-MILLAHA AREA, NORTH EASTERN DESERT, EGYPT

Wadi Millaha area is located in the North Eastern Desert of Egypt. It has been systematically surveyed using airborne gamma-ray spectrometri c and magnetic methods. In the present study, the identification of bo th uranium and thorium anomalies has been mainly based on examining a set of composite spectrometric profiles over eight radiometric anomali es. The studies revealed the presence of two high radiometric anomalie s while the rest are moderate to weak ones. The fault systems in the a rea under study play an important role in the distribution of most of the identified radioactive anomalies. Two sets oriented ENE to NE and NNW proved to have a significant effect on of the majority of these ra diometric anomalies. The structural interpretation of aeromagnetic dat a of the area under consideration was delineated. Moreover the qualita tive interpretation for the magnetic anomalies about the main structur al and lithologic manifestation is accomplished. Filtering of the anom alies was done to assist in discriminating shallow and deep ones. Appl ication of trend analysis for aeromagnetic and aeroradiometric data co uld show the dominant subsurface structures in the N-S trend, while th at of the surfaces is in the NW-SE trend.