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<p>The main objective of this study is to assess the linkage between airborne geophysical data and geological structures to delineate radioactive and mineralized zones at Wadi El-Urf environs. Airborne gamma-ray spectrometry reveals different levels oscillating from 2 to 18.8 Ur, 0.7–3.5%, 0.1–10.5 ppm and 1.3–27.8 ppm for total count (T.C), K, eU and eTh, respectively. The highest values coincide with monzogranite and alkali feldspar granite. Two magnetic zones have been identified as a result of magnetic characters from total magnetic map. Besides, the reduced to pole magnetic anomaly map has shown a similar magnetic character to total magnetic map but with major changes at different corners. The average estimated depths to the magnetic sources deduced from power spectrum curve reached 450 and 950&#xa0;m for shallow and deep seated structures. The analyzed aeromagnetic data show many trends (E–W, NW, NE, NNW, and N–S), which control the distribution of mineralization. Depth levels of geological contacts and faults that represented pathways for altered and mineralized zones varied from &lt; 500 to &gt; 700&#xa0;m (Euler deconvolution). From detailed geological structures, there is a remarkable temporal association of mineralization to extensional tectonics, as extensional trends oriented E–W and N–S directions inferred from reactivated NNW, NNE, WNW and ENE faults. The integration of geological structures with airborne geophysical data reveal that copper, barite and gold deposits are mostly spread along intersection of extensional sinistral shear zones have NW trend with the dextral shear zones that have an ENE trend.</p>

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Delineation of radioactive and mineralized zones in NE Desert of Egypt: integration of structural analysis and airborne geophysical data

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • Mohamed S. Mostafa,
  • Hussein F. Abd El Salam,
  • Mohamed A. Shaheen,
  • Ahmed E. Abdel Gawad

摘要

The main objective of this study is to assess the linkage between airborne geophysical data and geological structures to delineate radioactive and mineralized zones at Wadi El-Urf environs. Airborne gamma-ray spectrometry reveals different levels oscillating from 2 to 18.8 Ur, 0.7–3.5%, 0.1–10.5 ppm and 1.3–27.8 ppm for total count (T.C), K, eU and eTh, respectively. The highest values coincide with monzogranite and alkali feldspar granite. Two magnetic zones have been identified as a result of magnetic characters from total magnetic map. Besides, the reduced to pole magnetic anomaly map has shown a similar magnetic character to total magnetic map but with major changes at different corners. The average estimated depths to the magnetic sources deduced from power spectrum curve reached 450 and 950 m for shallow and deep seated structures. The analyzed aeromagnetic data show many trends (E–W, NW, NE, NNW, and N–S), which control the distribution of mineralization. Depth levels of geological contacts and faults that represented pathways for altered and mineralized zones varied from < 500 to > 700 m (Euler deconvolution). From detailed geological structures, there is a remarkable temporal association of mineralization to extensional tectonics, as extensional trends oriented E–W and N–S directions inferred from reactivated NNW, NNE, WNW and ENE faults. The integration of geological structures with airborne geophysical data reveal that copper, barite and gold deposits are mostly spread along intersection of extensional sinistral shear zones have NW trend with the dextral shear zones that have an ENE trend.