Geochemistry, mineralogy, and radioactivity of the Abu Furad Area, Central Eastern Desert, Egypt

Mezayen, Ahmed M. El; Zeid, Ehab K. Abu; Hosny, W. S.; El-Feky, Mohamed G.; Omar, Sayed M.; Taalab, Sherif A.

doi:10.1007/s11631-018-0302-7

Cited by 9 publications

(4 citation statements)

References 18 publications

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“…Egyptian Neoproterozoic basement complex constitutes the northern sector of the Arabian Nubian Shield (ANS), about 10% of the total area of Egypt, which crops out along the Red Sea (Eastern Desert), Uwainate area, and Southern Sinai [1,3,[11][12][13]. ANS represents one of the best-preserved juvenile Neoproterozoic rocks (550-900 Ma), which developed during the closing of the Mozambique Ocean [1].…”

Section: Geological Settingmentioning

confidence: 99%

“…Alteration processes refer to changes in the mineralogical and chemical composition of a rock by the action of hydrothermal solutions [12,13]. The alterations of the examined Dokhan volcanics along the faults led to the precipitation of radioactive minerals that geochemical studies can deduce.…”

Section: Geochemistry Of the Altered Rocksmentioning

confidence: 99%

“…On the other hand, natural radionuclides, including 238 U, 226 Ra, 232 Th, and 40 K, are widely distributed in recent rocks, such as granites and post-collision rocks [11][12][13]. The radioactive-bearing minerals are commonly essentially ascribed to alteration processes (e.g., kaolinitization, seritization, silicification, and silicification), [12,13]. Radioactive minerals include primary uranium (e.g., pitchblende) and secondary (e.g., uranophane) mineralizations.…”

Section: Introductionmentioning

confidence: 99%

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An Extended Investigation of High-Level Natural Radioactivity and Geochemistry of Neoproterozoic Dokhan Volcanics: A Case Study of Wadi Gebeiy, Southwestern Sinai, Egypt

et al. 2022

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High-level natural radioactivity, geochemical, geological, and radiological hazard assessment of the poorly investigated Wadi Gebeiy Dokhan volcanics rocks are discussed. Wadi Gebeiy Dokhan volcanics are located in Southwestern Sinai, Egypt, covering an area of ~1.3 km2. Dokhan volcanics rocks are represented by porphyritic dacite. Geochemically, they have medium-k characters and originate from calc-alkaline magma within a volcanics arc environment. Along the fault plane striking NNE-SSW, and at its intersection with the NW-SE fault plane, altered Dokhan volcanics occur with high radioactive anomalies. Radiological parameters (absorbed dose rate, radium equivalent, activity annual effective dose, external and internal hazard indices) are used to evaluate their suitability as an ornamental stone. Except for the absorbed dose rate, all the radiological hazard indices show that unaltered Dokhan volcanics can be used as an ornamental stone. Controversially, the applied radiological indices reveal that altered Dokhan volcanics have a higher content than the recommended values of UNSCEAR, reflecting their risk on human organs.

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Section: Geological Settingmentioning

confidence: 99%

Section: Geochemistry Of the Altered Rocksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Extended Investigation of High-Level Natural Radioactivity and Geochemistry of Neoproterozoic Dokhan Volcanics: A Case Study of Wadi Gebeiy, Southwestern Sinai, Egypt

et al. 2022

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“…These rocks break into pieces over time under environmental conditions and spread across the environment. Uranium, thorium and potassium concentrations are mostly higher in the granitic rocks, granitic pegmatites and syenites, and are closely linked to mineralogical composition and petrographic features [ 8 , 9 , 10 , 11 ]. In general, felsic igneous rocks have greater levels than sedimentary rocks.…”

Section: Introductionmentioning

confidence: 99%

Radiological Hazard Evaluation of Some Egyptian Magmatic Rocks Used as Ornamental Stone: Petrography and Natural Radioactivity

et al. 2021

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Magmatic rocks represent one of the most significant rocks due to their abundance, durability and appearance; they can be used as ornamental stones in the construction of dwellings. The current study is concerned with the detailed petrography and natural radioactivity of seven magmatic rocks. All are commercial granitic rocks and are identified as black Aswan, Nero Aswan, white Halayeb, Karnak, Verdi, red Hurghada and red Aswan. Their respective mineralogical compositions are classified as porpheritic granodiorite, granodiorite, tonalite, monzogranite, syenogranite, monzogranite and syenogranite. A total of nineteen samples were prepared from these seven rock types in order to assess their suitability as ornamental stones. Concentrations of 226Ra, 232Th and 40K radionuclides were measured using NaI (Tl) scintillation gamma-ray spectrometry. Among the studied magmatic rocks, white Halayeb had the lowest average values of 226Ra (15.7 Bq/kg), 232Th (4.71 Bq/kg) and 40K (~292 Bq/kg), all below the UNSCEAR reported average world values or recommended reference limits. In contrast, the other granitic rocks have higher values than the recommended limit. Except for the absorbed dose rate, other radiological hazard parameters including radium equivalent activity, annual effective dose equivalent, external, and internal hazard indices reflect that the White Halyeb rocks are favorable for use as ornamental stone in the construction of luxurious and high-demand residential buildings.

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Natural radioactivity, mineralogy and hazard assessment of syenogranites (ornamental stones) using a statistical approach

Taalab,

Ismail,

El Maadawy

et al. 2024

Nuclear Engineering and Technology

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Geochemistry, mineralogy, and radioactivity of the Abu Furad Area, Central Eastern Desert, Egypt

Cited by 9 publications

References 18 publications

An Extended Investigation of High-Level Natural Radioactivity and Geochemistry of Neoproterozoic Dokhan Volcanics: A Case Study of Wadi Gebeiy, Southwestern Sinai, Egypt

An Extended Investigation of High-Level Natural Radioactivity and Geochemistry of Neoproterozoic Dokhan Volcanics: A Case Study of Wadi Gebeiy, Southwestern Sinai, Egypt

Radiological Hazard Evaluation of Some Egyptian Magmatic Rocks Used as Ornamental Stone: Petrography and Natural Radioactivity

Natural radioactivity, mineralogy and hazard assessment of syenogranites (ornamental stones) using a statistical approach

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