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The aim of this work is to conduct a ground follow up for four airborne γ-ray spectrometric anomalies located in east Abu-Zeneima area, southwestern Sinai, Egypt. To achieve this goal, the selected localities were first geologically studied, then field γ-ray spectrometric measurements were carried out along a number of profiles, in a direction at high angle to the main structural and radiometric features. Four horizons in the Paleozoic section were identified with high uranium contents. They include Gabal (G.) Khamela, Ramlet Homayer, G. Homayer and G. Ghorabi, all are characterized by high uranium anomalies. The older horizon represents the top most parts of Adadia Formation and is represented by a highly ferruginous sandstone bed which is recorded in G. Khamela, Ramlet Homayer and at the base of G. Homayer. The second horizon is located in Adadia Formation and is represented by sandstone which recorded in G. Ghorabi. The third horizon is the yellowish and whitish sandstone of El-Hashash Formation at G. Homayer and very close to the doloritic dyke situated at its eastern side. The fourth horizon is located at Magharet El-Maiah Formation and is represented by shale and kaolin at G. Homayer. G. Khamela zone shows high eU/eTh ratios reaching more than 9.5, which are associated with the Adadia sandstone and display elongated E-W and NW-SE trends. There are high eU/eTh anomalies in the Ramlet Homayer zone, which reach more than 5 in value and represented by ferruginous sandstone of Adadia Formation. The excavated trenches situated at the contact between Adadia sandstone and the basic dyke in the G. Homayer anomalous zone are characterized by high eU/eTh ratio reaching 12.5. The significant anomalies of eU/eTh ratio in the G. Ghorabi zone reached 3 in value and possess different shapes. They are distributed in the siltstone, which is controlled by NW-SE trend.

GROUND GAMMA-RAY SPECTROMETRIC SURVEY OF SOME URANIUM ANOMALIES, EAST ABU-ZENEIMA AREA, SOUTHWESTERN SINAI, EGYPT