Lasheen, El Saeed R., El-Badry, Basma A., Mohamed, Waheed H., Khouqeer, Ghada A., Sanislav, Ioan, and Sami, Mabrouk (2025) Radioactivity and aeromagnetic of magmatic suites, Arabian Nubian Shield: Petrological and health risk characteristics. Journal of Radiation Research and Applied Sciences, 18 (4). 101910.

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Abstract

This study attempts to assess radiation doses in the El Maghrabiya- Ria Elgarra granitic phases and elucidate the subsurface structural influences on mineralization employing sophisticated airborne magnetic data processing and interpretation methods. The granitic phases include granodiorite, monzogranites, syenogranites, and altered granites (which are frequently visible along shear zones). The former rocks show a small amount of 238U (21.70 ± 11.87 Bqkg−1), 232Th (20.20 ± 12.78 Bqkg−1), and 40K (305.18 ± 168.1 Bqkg−1) employing the NaI (Tl) spectrometer. Monzogranites contain 238U (43.40 ± 41.13 Bqkg−1), 232Th (29.29 ± 5.08 Bqkg−1), and 40K (1169.84 ± 79.45 Bqkg−1), while syenogranites include high amounts of 238U (121.52 ± 46.73 Bqkg-1), 232Th (96.15 ± 12.58 Bqkg−1), and 40K (1315.23 ± 146.62 Bqkg−1). Furthermore, the altered granites had the greatest activity of 232Th (105.04 ± 65.73 Bqkg−1), 40K (683.91 ± 333.34 Bqkg−1), and 238U (1674.00 ± 1275.25 Bqkg−1), alongside the total quantity (avg. 1842.90 ± 871.02 Bqkg−1). Several radiological elements have been utilized to assess the risk inherent with these rocks. Granodiorite and monzogranite results are consistent with established global standards, however syenogranites and altered granites exhibited elevated metrics. Therefore, granodiorite and monzogranite are suitable for use in the construction sector, whereas syenogranites and altered granites are unsuitable due to their elevated natural gamma radiation emissions. Upward continuation was subsequently applied to RTP aeromagnetic data at four discrete levels (0.5 km, 1 km, 2 km, and 3 km), corresponding to average source depths, to image subsurface geological structures. Based on automated lineament extraction methods and rose diagrams, the principal structural directions are N-S, NNW-SSE, and E-W. The identification of these trends as the dominant structural trends is not just a descriptive finding; it reveals the fundamental plumbing system of the region. These trends are the highways and intersections along which mineralizing fluids traveled and where they were most likely to deposit their economic metal load.

Item ID:	88816
Item Type:	Article (Research - C1)
ISSN:	2314-7164
Copyright Information:	© 2025 The Authors. Published by Elsevier B.V. on behalf of The Egyptian Society of Radiation Sciences and Applications. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Date Deposited:	16 Sep 2025 01:38
FoR Codes:	37 EARTH SCIENCES > 3705 Geology > 370503 Igneous and metamorphic petrology @ 50% 37 EARTH SCIENCES > 3706 Geophysics > 370601 Applied geophysics @ 50%
SEO Codes:	28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280107 Expanding knowledge in the earth sciences @ 100%
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