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Название: Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material
Авторы: El Dabe, M. M.
Ismail, A. M.
Metwaly, M.
Taalab, S. A.
Hanfi, M. Y.
Ene, A.
Дата публикации: 2022
Издатель: MDPI
MDPI AG
Библиографическое описание: Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material / M. M. El Dabe, A. M. Ismail, M. Metwaly et al. // Materials. — 2022. — Vol. 15. — Iss. 3. — 1224.
Аннотация: The present study aimed to assess the radiological hazards associated with applying the investigated granite in the building materials and the infrastructures applications. The investigated granites are classified into four categories: El-Urf, barren, colourful and opaque. El Urf monzogran-ite intrudes metagabbro diorite complex with sharp contacts. Based on the activity concentrations, the environmental parameters such as absorbed dose rate (Dair), annual effective dose (AED), ra-dium equivalent activity (Raeq), external (Hex) and internal (Hin) hazard indices were measured. The mineralized pegmatite is located in the southwestern foothill of the Gabal El Urf younger granite. It displays well-defined zonation of three zones: outer, middle and inner zones represented by potash feldspar, quartz and mica, respectively. The isorad map showed that El Urf monzogranite is barren (Up to 100 cps) surrounding an excavation of the studied pegmatite that exhibits moderate colorful mineralization (phase-I = 500–1500 cps) and anomalous opaque mineralization (phase-II = 1500– 3500 cps) pegmatites. The obtained results of radionuclides activity concentrations illustrated that the Opaque granites have the highest values of238U (561 ± 127 Bq kg−1),232Th (4289 ± 891 Bq kg−1) and40K (3002 ± 446 Bq kg−1) in the granites, which are higher than the recommended worldwide average. Many of the radiological hazard parameters were lesser than the international limits in the younger granites and barren pegmatites. All of these parameters were higher in the colorful and opaque mineralized pegmatites. The high activity and the elevated radiological hazard parameters in the mineralized pegmatites are revised to the presence of radioactive and radioelements bearing minerals, such as thorite, meta-autunite, kasolite, phurcalite, columbite, fergusonite, Xenotime and fluorapatite. Other instances of mineralization were also recorded as cassiterite, atacamite, galena, pyrite and iron oxide minerals. Thus, the granites with high radioactivity concentration cannot be applied in the different applications of building materials and ornamental stones. © 2022 by the authors. Li-censee MDPI, Basel, Switzerland.
Ключевые слова: GABAL EL URF
PEGMATITIC ROCKS
POLY-PHASED MINERALIZATION URANOTHO-RITE
RADIOACTIVE MINERALS
RADIOLOGICAL HAZARD PARAMETERS
ZONED PEGMATITE
BUILDING MATERIALS
FELDSPAR
HAZARDS
MANGANESE OXIDE
MICA
MINERALOGY
POTASH
RADIOACTIVITY
ACTIVITY CONCENTRATION
BUILDINGS MATERIALS
GABAL EL URF
MINERALISATION
PEGMATITIC ROCK
POLY-PHASED MINERALIZATION URANOTHO-RITE
RADIOACTIVE MINERAL
RADIOLOGICAL HAZARD
RADIOLOGICAL HAZARD PARAMETER
ZONED PEGMATITE
GRANITE
URI: http://elar.urfu.ru/handle/10995/112108
Условия доступа: info:eu-repo/semantics/openAccess
Идентификатор SCOPUS: 85124206291
Идентификатор WOS: 000759416000001
Идентификатор PURE: 29634986
ISSN: 1996-1944
DOI: 10.3390/ma15031224
Сведения о поддержке: Funding: This research was funded by the Nuclear Materials Authority, Egypt. The APC was covered by “Dunarea de Jos” University of Galati, Romania, through grant no. RF3621/2021.
Располагается в коллекциях:Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC

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