Airborne gamma-ray spectrometric data interpretation on Wadi Queih and Wadi Safaga area, Central Eastern Desert, Egypt

El-Qassas, Reda A. Y.; Salaheldin, M; Assran, S.M. Assran; Fattah, Th. Abdel; Rashed, Mohamed

doi:10.1080/20909977.2020.1728893

Cited by 11 publications

(3 citation statements)

References 5 publications

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“…The mean and standard deviation of the measured radiation parameters were established under normal distribution. Hence, all statistical analyses were performed using parametric statistical methods (Reda et al 2020). The results of the statistical parameters of the datasets categorized as minimum values, maximum values, averages (arithmetic mean), standard deviation and coefficient of variation are presented in Table 1.…”

Section: Geostatistics Of the Petrological Unitsmentioning

confidence: 99%

Spatial distribution of radiogenic heat in the Iullemmeden basin – Precambrian basement transition zone, NW Nigeria

Aisabokhae

Adeoye²

2021

geol

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The area which transcends the Precambrian basement complex onto the Sokoto sector of the Iullemme-den basin in northwestern Nigeria presents a unique prospect for geothermal exploration research in the absence of regional heat production data, despite its tectonic history and depositional characteristics. In this study, geophysical exploration employing radiometric technique was adopted to classify the petrologic units within the fringes of the Iullemmeden basin and the adjoining crystalline basement complex so as to estimate the radiogenic heat potential within the terrain that may support geothermal considerations. Airborne radiometric measurements acquired over the area were digitized and processed to obtain radioelement concentration maps and the K/Th/U ternary map. Results show that the ranges of measured concentrations of 40K, 238U and 232Th are 4.6 to 18.9%, 0.7 to 4.9 ppm and 4.6 to 18.9 ppm respectively. Radiogenic heat estimation derived from radioelement data within eight petrologic units comprising quaternary sediments, schist, carbonates, shale/clay, younger granites, older granites, gneissic rock and migmatite showed that the lowest radiogenic heat production estimates ranging from 0.27–0.66 μW∙m−3 were recorded in the sedimentary terrain within the quaternary sediments while the highest radiogenic heat production values of between 2.04 to 2.34 μW∙m−3 were recorded in the basement com-plex within gneissic rocks. The spatial distribution of radiogenic heat in the area showed an increased heat gradient within the basement complex and a diminishing heat gradient over the Iullemmeded basin.

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Section: Geostatistics Of the Petrological Unitsmentioning

confidence: 99%

Spatial distribution of radiogenic heat in the Iullemmeden basin – Precambrian basement transition zone, NW Nigeria

Aisabokhae

Adeoye²

2021

geol

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“…The gamma-ray spectrometric measurements as a means for geological mapping have been reported in many locations of the world, to assess radionuclide concentrations in crustal formations (El-sadek 2009;Adabanija et al 2020;El Qassas et al 2020), in geothermal fields (Saqan et al 2001;Eggeling et al 2013), along geologically altered zones (Ramola et al 2014), in volcanic areas (Rosianna et al 2020;Cinelli et al 2020), and in active mining sites (Innocent et al 2013). Radionuclides also serve as e ective geochemical indicators (Wang et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Radioactivity, radiogenic heat production and environmental radiation risk of the Basement Complex rocks of Akungba-Akoko, southwestern Nigeria: insights from in situ gamma-ray spectrometry

et al. 2021

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The Basement Complex rocks of Akungba-Akoko, southwestern Nigeria, typically migmatites (M), biotite gneisses (BGN), granite gneisses (GGN), charnockites (Ch), biotite granites (BG) and pegmatites (P), were assessed using ground gamma-ray spectrometry (GRS). This study aimed at determining rocks' radionuclides concentration, alterations, radionuclides mobilization, radiogenic heat production (RHP) rate (first report for the area) and environmental radiation risk to humans. The results of this study were integrated with previous data on the petrography and geochemistry of these rocks, for detailed interpretation. The results of average elemental and activity concentrations for Akungba-Akoko rocks, were 2.66%, 3.16 ppm and 13.98 ppm, and 831.35, 39.01 and 56.77 for 40 K, 238 U and 232 Th, respectively; with increasing rock order of Ch < M < GGN < BGN < P < BG. High radionuclides concentration in the rocks, with exception of charnockites, were determined by high fraction of K-feldspar, plagioclase, biotite and accessory minerals -zircon and monazites. On the other hand, the low radionuclides concentration in the rocks, especially in Ch and M, were aided by the variability of the naturally occurring radioactive elements (NORMs) caused by alterations and mobilization during metamorphism and crystallization processes as suggested by radioelements composite, K/eTh ratio and F-parameter of Efimov analyses. RHP average of 2.03 µ above the crustal average range of 0.8 -1.2 µ may have significantly contributed to the heat flux in the studied area; however, the RHP of charnockites are lower than the crustal range. The absorbed dose rate average of 87.98 was within the permissible range, and other estimated radiological parameters, namely annual effective doses, hazard indices, gamma activity and activity utilization index, were all far below the permissible limit of 1 for these rocks. However, annual gonad dose equivalent (618.874) and excess life cancer risk (1.511 10 ) were above their permissible limits. Due to the high gamma radiations from the pegmatitic and biotite-rich rocks in the studied area, their high usage should be reduced. Hence, periodic monitoring of the study area is advised.

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“…This higher value Potassium-40 may be due to its ability to dissolve in water nonetheless doesn't accrue to the body system. Therefore, it remains stable at a level that is autonomous of its intake [36].…”

Section: Resultsmentioning

confidence: 99%

Assessment of activity concentrations of radioactive elements in selected groundwater samples of Kwara State Polytechnic and its environs, North Central Nigeria

Lawal,

Abayomi,

Oluwakorede Fawale

2023

Recent Adv. Nat. Sci

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A NaI (TI) indicator was used to quantify the activity concentrations level of Uranium (U-238), Thorium (Th-232) & Potassium (K-40) in forty (40) groundwater samples collected across the premises of Kwara state polytechnic and its environs in order to determine the health hazard due intake of drinking water which has its origin from the subsurface. This investigation became necessary as a result of an outbreak of water borne diseases reported by the medical personnels in the clinics around the area. The results obtained from this measurement shows a range of values from 1.01 ± 0.02 to 8.21 ± 1.73, a mean of 3.88 ± 0.609 Bq.l−1 for U-238, 0.97 ± 0.01 to 14.81 ± 2.79, a mean value of 7.02 ± 0.99 Bq.l−1 Th-232 & 4.44 ± 0.12 to 147.33 ± 6.59 Bq.l−1, a mean of 48.08 ± 2.513 Bq.l−1 for K-40. The mean of these Radionuclides (U-238, Th-232 and K-40) are higher than the Universal value 10 Bq.l−1 for K-40 and 1 Bq.l−1 for U-238 and Th-232 as the permissible level for drinking water (United Nations Scientific Committee on Effects of Atomic radiation recommended (UNSCEAR)). In addition, most of the average values of the calculated radiological indices are within the recommended allowable tolerable boundary, although higher values were obtained in some within the study area. These results shows that U-238, Th-232 and K-40 concentrations and radiological parameters in the samples are high and low in values but might take a Probabilistic effect on the residents in the near future

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Airborne gamma-ray spectrometric data interpretation on Wadi Queih and Wadi Safaga area, Central Eastern Desert, Egypt

Cited by 11 publications

References 5 publications

Spatial distribution of radiogenic heat in the Iullemmeden basin – Precambrian basement transition zone, NW Nigeria

Spatial distribution of radiogenic heat in the Iullemmeden basin – Precambrian basement transition zone, NW Nigeria

Radioactivity, radiogenic heat production and environmental radiation risk of the Basement Complex rocks of Akungba-Akoko, southwestern Nigeria: insights from in situ gamma-ray spectrometry

Assessment of activity concentrations of radioactive elements in selected groundwater samples of Kwara State Polytechnic and its environs, North Central Nigeria

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