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Название: Cancer Risk Assessment and Geochemical Features of Granitoids at Nikeiba, Southeastern Desert, Egypt
Авторы: Gawad, A. E. A.
Eliwa, H.
Ali, K. G.
Alsafi, K.
Murata, M.
Salah, M. S.
Hanfi, M. Y.
Дата публикации: 2022
Издатель: MDPI
Библиографическое описание: Cancer Risk Assessment and Geochemical Features of Granitoids at Nikeiba, Southeastern Desert, Egypt / A. E. A. Gawad, H. Eliwa, K. G. Ali et al. // Minerals. — 2022. — Vol. 12. — Iss. 5. — 621.
Аннотация: Different rock types (syenogranite, alkali feldspar granite and quartz syenite intruded by microgranite dikes and quartz veins) were investigated in the Nikeiba region in Egypt. The main components of the studied intrusive rocks, comprised of granites and quartz syenite, are plagioclase, amphibole, biotite, quartz and K-feldspar in different proportions. Ground gamma ray measurements show that syenogranite, quartz syenite and microgranite dikes have the highest radioactivity (K, eU, eTh and their ratios) in comparison with alkali feldspar granite. Geochemically, syenogranite, alkali feldspar granite and quartz syenite are enriched with large-ion lithophile elements (LILE; Ba, Rb, Sr) and high field-strength elements (HFSE; Y, Zr and Nb), but have decreased Ce, reflecting their alkaline affinity. These rocks reveal calc–alkaline affinity, metaluminous characteristics, A-type granites and post-collision geochemical signatures, which indicates emplacement in within-plate environments under an extensional regime. U and Th are increased in syenogranite and quartz syenite, whereas alkali feldspar granite shows a marked decrease in U and Th. The highest average values of AU (131 ± 49 Bq·kg−1), ATh (164 ± 35) and AK (1402 ± 239) in the syenogranite samples are higher than the recommended worldwide average. The radioactivity levels found in the samples are the result of the alteration of radioactive carrying minerals found inside granite faults. The public’s radioactive risk from the radionuclides found in the investigated granitoid samples is estimated by calculating radiological risks. The excess lifetime cancer (ELCR) values exceed the permissible limit. Therefore, the granitoids are unsuitable for use as infrastructure materials. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Ключевые слова: GAMMA RAY MEASUREMENTS
GEOCHEMISTRY
GRANITE
NIKEIBA
RADIOLOGICAL RISK
URI: http://elar.urfu.ru/handle/10995/117871
Условия доступа: info:eu-repo/semantics/openAccess
Идентификатор SCOPUS: 85129843294
Идентификатор WOS: 000804920100001
Идентификатор PURE: 30208027
ISSN: 2075163X
DOI: 10.3390/min12050621
Располагается в коллекциях:Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC

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