In this study, the major, rare earth elements and the natural radioactivity of thorium, radium, and potassium radionuclides of the granitic rock samples collected from Gabal (mountain) Ghareb, Eastern Desert of Egypt were determined. Inductively coupled plasma atomic emission spectrometry (ICP-AES), mass spectrometry (ICP-MS) and high purity germanium detector (HP Ge) were used. The geologic and radiometric surveys on Gabal Ghareb indicated that uranium mineralization is associated with shear zones and fractures following NNE–SSW and NW–SE. The uranium mineralization is localized along the NNE–SSE faults and trapped by fractures cutting these shear zone in the eastern part of Gabal Ghareb. The predominant rock types are granites, granodiorites, granosyenites and syenites of geochemical peraluminous character. The variation in the major oxides and REE elements concentration reflects magmatic differentiation and post magmatic hydrothermal alterations for the investigated samples. The radiological parameters measured are: radium equivalent activity index Ra_eq (199.89 Bq/kg), absorbed dose rate ADR (94.25 nGy/h), annual effective dose equivalent AEDE (0.46 mSv/yr), gamma index I_ɣ (0.74), alpha index I_α (0.26), annual gonadal dose equivalent AGDE (668.10 μSv/yr), excess lifetime cancer risk ELCR (1.62 × 10^–3), external and internal hazard indices H_ex and H_in (0.54 and 0.68). The multivariate Dendrogram cluster analysis showed good agreement with each other. A great care should be taken in consideration when dealing with the Ghareb rocks, as they cannot be used as construction material due to their radiological threat to population and radiation protection precautionary measures must be taken. Comparison between the radiological parameters of other areas from the northern and southern parts of Egypt were given.

在这项研究中，测定了从埃及东部沙漠 Gabal（山）Ghareb 采集的花岗岩样品的主要稀土元素和钍、镭和钾放射性核素的天然放射性。使用电感耦合等离子体原子发射光谱法 (ICP-AES)、质谱法 (ICP-MS) 和高纯度锗检测器 (HP Ge)。Gabal Ghareb 的地质和辐射测量表明，铀矿化与 NNE-SSW 和 NW-SE 之后的剪切带和裂缝有关。铀矿化位于 NNE-SSE 断层沿线，并被 Gabal Ghareb 东部剪切带切割的裂缝所困。主要岩石类型是花岗岩、花岗闪长岩、花岗正长岩和地球化学过铝质正长岩。主要氧化物和稀土元素浓度的变化反映了研究样品的岩浆分异和岩浆后热液蚀变。测量的放射学参数为：镭当量活度指数 Ra_eq (199.89 Bq/kg)、吸收剂量率 ADR (94.25 nGy/h)、年有效剂量当量 AEDE (0.46 mSv/yr)、γ 指数I _ɣ (0.74)、α 指数I _α (0.26)、年度性腺剂量等效 AGDE (668.10 μSv/yr)，超额终生癌症风险 ELCR (1.62 × 10 ^–3 )，外部和内部危险指数H _ex和H _in（0.54 和 0.68）。多变量树状图聚类分析显示出彼此之间的良好一致性。处理 Ghareb 岩石时应特别小心，因为它们不能用作建筑材料，因为它们对人口构成放射性威胁，必须采取辐射防护预防措施。给出了埃及北部和南部其他地区的放射学参数的比较。