Elemental distribution patterns in rock samples from Egypt using neutron activation and complementary X-ray fluorescence analyses.

Autor: Badawy W; Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation; Radiation Protection and Civil Defense Department, Nuclear Research Center, Egyptian Atomic Energy Authority, 13759 Cairo, Egypt. Electronic address: wael@jinr.ru., Silachyov I; Institute of Nuclear Physics, Ibragimov str.1, 050032 Almaty, Kazakhstan., Dmitriev A; Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation., Lennik S; Institute of Nuclear Physics, Ibragimov str.1, 050032 Almaty, Kazakhstan., Saleh G; Nuclear Materials Authority, El-Maadi, P.O. Box 530, Cairo, Egypt., Mitwalli M; Physics Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt., El-Farrash A; Physics Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt., Sallah M; Physics Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt; Higher Institute of Engineering and Technology, New Damietta 34517, Egypt.
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2023 Dec; Vol. 202, pp. 111063. Date of Electronic Publication: 2023 Oct 06.
DOI: 10.1016/j.apradiso.2023.111063
Abstrakt: The study utilized instrumental neutron activation analysis (INAA) and X-ray fluorescence (XRF) to accurately analyze the elemental composition of 28 felsite (rhyolite), rock samples. Statistical approaches, including bivariate and multivariate analysis, were employed to characterize the rocks and determine their origin. Major findings include significantly high levels of silicon (297000 ± 4000) mg/kg and low levels were noticed for gold (0.10 ± 0.01) mg/kg. The dominant major elements in the rocks were ranked as follows: silicon > aluminum > potassium > sodium > zirconium > calcium > zinc > manganese. A comparison with the upper continental crust (UCC) revealed higher levels for most elements, except for a few. The study also identified substantial amounts of uranium and thorium. Variations in elemental composition were observed both between different profiles and within felsite (rhyolite) rock samples, indicating heterogeneity and varying origins of the rocks. The findings contribute valuable baseline data for the area and highlight its economic significance for Egypt. Additionally, the study addresses the integration of results from different analytical methods, providing a comprehensive answer to this issue.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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