Using Portable Gamma‐Ray Spectrometry for Testing Uranium Migration: A Case Study from the Wadi El Kareim Alkaline Volcanics, Central Eastern Desert, Egypt.
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| Title: | Using Portable Gamma‐Ray Spectrometry for Testing Uranium Migration: A Case Study from the Wadi El Kareim Alkaline Volcanics, Central Eastern Desert, Egypt. |
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| Authors: | DESSOUKY, Osama K.1, ALI, Hani H.1 |
| Source: | Acta Geologica Sinica (English Edition). Dec2018, Vol. 92 Issue 6, p2214-2232. 19p. |
| Subject Terms: | *Migration of uranium, *Gamma ray spectrometry, *Radioactivity, *Geochemistry, *Volcanism, *Geology |
| Geographic Terms: | Egypt |
| Abstract: | The 300±20 Ma anomalously radioactive trachytes of Wadi El Kareim, central Eastern Desert, are a significant example of U‐mineralization related to the alkaline volcanics in Egypt. Extensive portable gamma‐ray spectrometric data has been utilized to identify geological factors controlling uranium mobility in the geological units along the three detailed study locations of Kab Al‐Abyad, South Wadi (W) Al‐Tarafawy and W. Al‐Farkhah; their eTh/eU ratios averaging around 4.1, 3.7 and 5.6 respectively. Quantitative analysis with the integration of mobility maps and geological studies suggest two systems controlling U‐migration within the geological units (confined system and unconfined system). In the confined system, the syngenetically formed U have experienced mobility after leaching and are redistributed in the presence of an incorporation carrier during transportation (probably as carbonate complexes). Then the retardant for uranium is achieved by sorption or by coprecipitation with the aid of Fe oxy‐hydroxide, and finally the formation of immobile secondary U‐bearing minerals takes place along a lithogeochemical trap. In contrast to the confined system, the unconfined one is basically lacking the lithogeochemical trap which influences the final accumulation of U‐bearing minerals. The radioactivity of the trachyte rocks arises from the radioactive minerals uranophane and beta‐uranophane with U‐ and/or Th‐bearing minerals samarskite, Th‐rich REE silicates, monazite and allanite. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 133754663 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Using Portable Gamma‐Ray Spectrometry for Testing Uranium Migration: A Case Study from the Wadi El Kareim Alkaline Volcanics, Central Eastern Desert, Egypt. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22DESSOUKY%2C+Osama+K%2E%22">DESSOUKY, Osama K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22ALI%2C+Hani+H%2E%22">ALI, Hani H.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Acta+Geologica+Sinica+%28English+Edition%29%22">Acta Geologica Sinica (English Edition)</searchLink>. Dec2018, Vol. 92 Issue 6, p2214-2232. 19p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Migration+of+uranium%22">Migration of uranium</searchLink><br />*<searchLink fieldCode="DE" term="%22Gamma+ray+spectrometry%22">Gamma ray spectrometry</searchLink><br />*<searchLink fieldCode="DE" term="%22Radioactivity%22">Radioactivity</searchLink><br />*<searchLink fieldCode="DE" term="%22Geochemistry%22">Geochemistry</searchLink><br />*<searchLink fieldCode="DE" term="%22Volcanism%22">Volcanism</searchLink><br />*<searchLink fieldCode="DE" term="%22Geology%22">Geology</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Egypt%22">Egypt</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The 300±20 Ma anomalously radioactive trachytes of Wadi El Kareim, central Eastern Desert, are a significant example of U‐mineralization related to the alkaline volcanics in Egypt. Extensive portable gamma‐ray spectrometric data has been utilized to identify geological factors controlling uranium mobility in the geological units along the three detailed study locations of Kab Al‐Abyad, South Wadi (W) Al‐Tarafawy and W. Al‐Farkhah; their eTh/eU ratios averaging around 4.1, 3.7 and 5.6 respectively. Quantitative analysis with the integration of mobility maps and geological studies suggest two systems controlling U‐migration within the geological units (confined system and unconfined system). In the confined system, the syngenetically formed U have experienced mobility after leaching and are redistributed in the presence of an incorporation carrier during transportation (probably as carbonate complexes). Then the retardant for uranium is achieved by sorption or by coprecipitation with the aid of Fe oxy‐hydroxide, and finally the formation of immobile secondary U‐bearing minerals takes place along a lithogeochemical trap. In contrast to the confined system, the unconfined one is basically lacking the lithogeochemical trap which influences the final accumulation of U‐bearing minerals. The radioactivity of the trachyte rocks arises from the radioactive minerals uranophane and beta‐uranophane with U‐ and/or Th‐bearing minerals samarskite, Th‐rich REE silicates, monazite and allanite. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/1755-6724.13724 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 2214 Subjects: – SubjectFull: Migration of uranium Type: general – SubjectFull: Gamma ray spectrometry Type: general – SubjectFull: Radioactivity Type: general – SubjectFull: Geochemistry Type: general – SubjectFull: Volcanism Type: general – SubjectFull: Geology Type: general – SubjectFull: Egypt Type: general Titles: – TitleFull: Using Portable Gamma‐Ray Spectrometry for Testing Uranium Migration: A Case Study from the Wadi El Kareim Alkaline Volcanics, Central Eastern Desert, Egypt. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: DESSOUKY, Osama K. – PersonEntity: Name: NameFull: ALI, Hani H. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 10009515 Numbering: – Type: volume Value: 92 – Type: issue Value: 6 Titles: – TitleFull: Acta Geologica Sinica (English Edition) Type: main |
| ResultId | 1 |
