Mineralogical and geochemical characterization of radioactive minerals and rare earth elements in granitic pegmatites at G. El Fereyid, South Eastern Desert, Egypt

Saleh, Gehad M.; Afify, A.M.; Emad, Bahaa M.; Dawoud, Marwa M.; Shahin, Hassan A.; Khaleal, Farrage M.

doi:10.1016/j.jafrearsci.2019.103651

Cited by 16 publications

(12 citation statements)

References 19 publications

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“…9. The total content of REEs is up to 250 ppm [28]. When compared with Abu Rusheid area [36], they show lower contents, Table 2.…”

Section: Characteristics Of Gabal El Fereyid Reesmentioning

confidence: 95%

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Rare Earths in Egypt: Occurrence, Characterization and Physical Separation, A Review

Hassan

2023

International Journal of Materials Technology and Innovation

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Rare Earth Elements (REEs) consist of the fifteen lanthanide elements plus scandium and yttrium, and can be found in more than 250 minerals. They exist in reasonable abundance in the Earth's crust, but mining sites contain too small REEs concentration to be valuable for separation. Cerium, yttrium, lanthanum, and neodymium are the most abundant REEs in the crust with similar abundances to commonly mined nickel and zinc metals. However, their extraction is almost impossible as they are found in deposits with very low concentrations. These elements are applied in various modern applications, including high-tension magnets, additives for metal and glass, petroleum refining catalysts, and phosphors used in electronic displays. REEs never existed as pure metals, while they are found in many minerals, including carbonates, halides, oxides, phosphates and silicates. Bastnäsite, monazite, and xenotime, as REE-bearing minerals, could be mined economically. They could be recovered using gravity, magnetic, electrostatic, and flotation techniques. This review examines the mineralogy, characterization and physical separation techniques currently used for the beneficiation of Egyptian rare earth minerals and spots localities that require further research.

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“…9. The total content of REEs is up to 250 ppm [28]. When compared with Abu Rusheid area [36], they show lower contents, Table 2.…”

Section: Characteristics Of Gabal El Fereyid Reesmentioning

confidence: 95%

“…The Egyptian granites are a primary source of industrial minerals (feldspars, quartz), high-tech mineral stocks (Li, Cs, Nb, Ta, Sn, and REEs) and radioactive (Th and U) [27]. Many Egyptian granitic pegmatite areas were reported such as G. Ras Baroud, G. Abu Dob, Ras Mohamed, Gabal El Fereyid, Abu Rusheid and Abu Dabbab [28,29].…”

Section: The Granitic Pegmatitesmentioning

confidence: 99%

Rare Earths in Egypt: Occurrence, Characterization and Physical Separation, A Review

Hassan

2023

International Journal of Materials Technology and Innovation

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“…The wide ranges of eU/eTh ratio of Qash Amer granites (0.66-2.14) and eTh/K ratio (5.03-9.36) indicate that they have a very high U potential mobilization and its ratios is not normal and form anomalous zones (Saleh et al, 2019). The eU-eTh, (eU/eTh)-eU and eU-[eU+(eTh*3.5)] diagrams show depletion of uranium for both the Qash Amer and El Sela granitic samples.…”

Section: Radioactivity Ratiosmentioning

confidence: 99%

Radiological and Environmental Impacts of El Sela-Qash Amer Granites, South Eastern Desert, Egypt

Tawfik

Shaheen

Elsetouhi

2022

Nuclear Sciences Scientific Journal

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El Sela area is mainly covered by ophiolitic mélange (Sul Hamed), biotite granite, two-mica granite (El Sela), muscovite granites (Qash Amer), and cross cut by microgranite dolerite and bostonite dikes as well as quartz and japser veins. These granitic rocks are hydrothermally altered, especially around El Sela ENE-WSW shear zone, that causing hydrothermal alterations accompanied by radioactive mineralization. These rocks are mainly composed of alkali feldspar, quartz, muscovite, and biotite with zircon, fluorite, apatite and iron oxides as an accessory minerals. The radioactive minerals are represented by uranophane, autunite, meta-autunite and phurcalite which are restricted in the highly sheared microgranite, dolerite dikes as well as jasper veins. Uranium contents (eU) range from 10.1 to 17.7 ppm at Qash Amer with their thorium contents (eTh) vary from 5.8 to 22.7 ppm. El Sela granites have uranium contents (eU) range from 6.4 to 19.7 ppm with equivalent thorium content (eTh) range between 14.0 and 44.9 ppm. The eU-eTh, (eU/ eTh)-eU and eU-[eU+(eTh X 3.5)] diagrams show depletion of uranium for both the Qash Amer and El Sela granitic samples, suggesting that uranium may be leached out of the original rock towards the ENE-WSW and NNW-SSE shear zones. The migrated uranium (Um) amount was calculated and indicated as either migration out or migration in at Qash Amer and El Sela granites, mostly to the shear zone cutting through the area. Absorbed Dose Rate (D), annual effective dose equivalent (AEDE), radium equivalent activity (Raeq), external (Hex) and internal (Hin) hazard index, in addition to activity gamma index (Iγ) caused by gamma emitter natural radionuclide were determined from the obtained values of 238 U, 232 Th and 40 K. Most of the studied samples have radiological parameters values higher than the international recommended values suggesting that El Sela and Qash Amer granitic rocks are hazardous and not recommended for use as ornamental stones with respect to workers and human beings.

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“…2), two radioactive anomalies have been described in the Kab Amiri monsogranite: one in the silica veinlets and the other in the pegmatites. The pegmatites are made of quartz cores bounded by alkali feldspar [15,16,17,18,19]. The pegmatites show exceptionally high REE concentrations The distributions of REE of Kab Amiri deposits in different grain sizes are shown in Table 3.…”

Section: Granitesmentioning

confidence: 99%

Geology of Rare Metals in Egypt- A review

Baioumy

2021

International Journal of Materials Technology and Innovation

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The term "rare metals" refers in this work to metals with a low availability in natural. Based on their chemistry, rare metals were classified into; 1) rare earth elements (La-Lu), 2) trace elements (Nb, Ta, Mo, Cu, Ni, Co, Sn, W, V), 3) noble elements (Au, Ag, and PGE) and 4) fissionable elements (U and Th). In Egypt, rare earth elements occur in the phosphorites, monazite and granites. Trace elements occur in three associations; a) elements in granites and albite granites such as Nb, Ta, Sn, Mo, and W, b) elements associate mafic rocks and ophiolites include Cu, Ni, and Co, and c) V in the black shales. 95 Au localities were reported mainly as vein-type mineralization in the Eastern Desert. PGE are confined to three associations including mafic and ultramafic rocks, chromite and black shales as sulfides, alloys, and organometallic compounds, respectively. Uranium occurs in granites of the Eastern Desert. Thorium was reported at the Um Ara area at the Eastern Desert and in the monazite from the black sands. Although rare metals are quite common in Egypt, processing and beneficiations of the rare metals-bearing rocks did not reflect the abundance and the economic significance of these metals.

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Mineralogical and geochemical characterization of radioactive minerals and rare earth elements in granitic pegmatites at G. El Fereyid, South Eastern Desert, Egypt

Cited by 16 publications

References 19 publications

Rare Earths in Egypt: Occurrence, Characterization and Physical Separation, A Review

Rare Earths in Egypt: Occurrence, Characterization and Physical Separation, A Review

Radiological and Environmental Impacts of El Sela-Qash Amer Granites, South Eastern Desert, Egypt

Geology of Rare Metals in Egypt- A review

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