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<p>This study aims to assess the effectiveness of using airborne geophysical (magnetic and radiation) data to map radioactive-favorable zones in Wadi Rod Ghurabat area, South Eastern Desert, Egypt. Airborne gamma-ray spectrometry contour maps displayed marked variations in total-count, eU, eTh, and K parameters with ranges of 1.2–11.6 μR/h, 0.3–6.9&#xa0;ppm, 0.3–20.8&#xa0;ppm, and 0.1–3.2%, respectively. The highest anomalies of these radioelements coincide well with the syenogranite and alkali feldspar granite units. They are spatially associated with hydrothermal alteration zones characterized by albitization, silicification, greisenization, and hematitization. The lowest concentrations of these radioelements are associated with metasedimentary rocks, quartz diorite-granodiorite, Nubian sandstones, and Wadi sediments. To mitigate local magnetic effects, total aeromagnetic data were reduced to the North Magnetic Pole (RTP). The presence of parallel sets of strike-slip faults in the study area may also contribute to the aeromagnetic signatures. To identify near-surface magnetic lineaments, such as contacts, shear zones, faults, and dykes, advanced algorithms were applied to the RTP data. The 3-D model of magnetic susceptibility showed good agreement with known geological information. The depth levels of geological contacts and faults represented pathways for mineralized zones. These findings highlight the consistency between airborne gamma-ray spectrometry and magnetic survey data, thereby enabling the identification of the radioactive zones and structural framework of the studied area.</p>

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Delineation of favorable radioactive zones within the Wadi Rod Ghurabat granites (Egypt) using airborne radiometric and magnetic data

  • 期刊论文

  • 发表日期：

    2026年7月21日

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  • Hassan Mohamed,
  • Haitham F. Hammam,
  • Hussein F. Abd El Salam,
  • Ahmed E. Abdel Gawad,
  • Hakim Saibi

摘要

This study aims to assess the effectiveness of using airborne geophysical (magnetic and radiation) data to map radioactive-favorable zones in Wadi Rod Ghurabat area, South Eastern Desert, Egypt. Airborne gamma-ray spectrometry contour maps displayed marked variations in total-count, eU, eTh, and K parameters with ranges of 1.2–11.6 μR/h, 0.3–6.9 ppm, 0.3–20.8 ppm, and 0.1–3.2%, respectively. The highest anomalies of these radioelements coincide well with the syenogranite and alkali feldspar granite units. They are spatially associated with hydrothermal alteration zones characterized by albitization, silicification, greisenization, and hematitization. The lowest concentrations of these radioelements are associated with metasedimentary rocks, quartz diorite-granodiorite, Nubian sandstones, and Wadi sediments. To mitigate local magnetic effects, total aeromagnetic data were reduced to the North Magnetic Pole (RTP). The presence of parallel sets of strike-slip faults in the study area may also contribute to the aeromagnetic signatures. To identify near-surface magnetic lineaments, such as contacts, shear zones, faults, and dykes, advanced algorithms were applied to the RTP data. The 3-D model of magnetic susceptibility showed good agreement with known geological information. The depth levels of geological contacts and faults represented pathways for mineralized zones. These findings highlight the consistency between airborne gamma-ray spectrometry and magnetic survey data, thereby enabling the identification of the radioactive zones and structural framework of the studied area.