Determination of alteration zones and geological unit limits using natural radioactivity properties of Sandıklı-Suhut areas

Uyanık, N. Ayten; Öncü, Ziya; Uyanık, Osman; Bozcu, Mustafa

doi:10.1016/j.jappgeo.2021.104525

Cited by 11 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Background radiation accounts for 80% of the total annual radiation dose for a typical human (Prihatiningsih et al 2023 ). Geological materials are the major contributor to natural radioactivity (Kapanadze et al 2021 ; Uyanik et al 2022 ; Ofomola et al 2023 ). The accumulation and distribution of radionuclides are often considered heterogeneous and depend on the abundance of certain minerals.…”

Section: Introductionmentioning

confidence: 99%

Distribution of natural radioactivity in different geological formations and their environmental risk assessment in Malaysia

Seow,

Mohan Viswanathan,

Dodge-Wan

2024

Environ Sci Pollut Res

View full text Add to dashboard Cite

Labuan, Miri, Kundasang and Raub regions of Malaysia have very different geological formations and settings that could result in different levels of natural radioactivity. Hence, this study determines the influence of different geological formations on radioactivity in these locations using field measurements, petrology and geochemistry. A total of 141 gamma dose rates and 227 beta flux measurements were collected using Polimaster survey meters (PM1405) in these four regions. The gamma dose rate values range from 0.37 to 0.05 µSv/h with a mean value of 0.11 µSv/h. Beta flux values range from 3.46 to 0.12 CPS with a mean value of 0.57 CPS. Mineralogy and elemental composition of the different rock types were analysed using thin-section petrography, XRD, ICP and pXRF methods. Felsic igneous rocks such as syenite and granite have higher natural radioactivity and contain more radionuclide-bearing minerals such as apatite, zircon, allanite, K-feldspar, titanite, muscovite and biotite. Metamorphic rocks have the second highest natural radioactivity and contain fewer radioactive minerals. The natural radioactivity of sedimentary rocks mostly depends on their clay content. The gamma dose rate maps show that igneous and metamorphic regions around Raub have higher radioactivity compared to the sedimentary-dominated regions around Miri and Labuan. Annual effective dose (AED) and excess lifetime cancer risk (ELCR) were calculated to evaluate the potential health risk for inhabitants of these regions. Labuan and Miri are considered to be safe zones with respect to natural radioactivity as the results show little to no risk for the public, compared with the Raub region, which is medium to high risk.

show abstract

Section: Introductionmentioning

confidence: 99%

Distribution of natural radioactivity in different geological formations and their environmental risk assessment in Malaysia

Seow,

Mohan Viswanathan,

Dodge-Wan

2024

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…Accordingly, many researchers have conducted studies on the effect of cancer (for example: Kırklareli-Türkiye [19]; Isparta-Türkiye [8]; Penang-Malaysia [20]; Afyon-Türkiye [21]). In addition to studies in terms of human health, gamma-ray spectrometry studies geological unit separation [8], [12], precious metal and radioactive element exploration [12], [22], [23], geothermal studies [11], agricultural areas [24], archaeological sites [25] and it are used for many such purposes. In addition, the radioactive element concentration in the field gives also additional information about the geodynamics and tectonics of that region.…”

Section: Introductionmentioning

confidence: 99%

“…The average concentrations of 40 K, 238 U and 232 Th elements in the continental crust are in the range of 2-2.5%, 2-3ppm and 8-12ppm, respectively [27]. Many studies show that the radioactive element concentrations in rocks formed as a result of volcanic activity are higher than the crustal averages [8], [11], [12], [28]- [31]. Similarly, it is stated that magmatic stages are also reflected by 40 K, 238 U and 232 Th radioelement concentrations [32]- [34].…”

Section: Introductionmentioning

confidence: 99%

An Approach to Determine of the Formation Stages of Volcanism Using Natural Gamma-Ray Spectrometer from Geophysical Methods (Example of Gölcük Volcanism)

Uyanık

2023

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

View full text Add to dashboard Cite

Gölcük Caldera is in the Isparta Angle, which is an interesting tectonic structure in Southwest Anatolia. This caldera is formed as a result of back-arc volcanism associated with the northward subduction zone of the African plate under the Eurasian Plate during the Tertiary. It attracts the attention of many researchers with its tectonic and volcanic structure. In this article, the results of in situ natural gamma radiation measurements made in the caldera are evaluated. In the study, radioactive element (Potassium (%K), Uranium (eU), and Thorium (eTh)) contents of volcanics were measured in situ with the portable gamma-ray spectrometer, which is effectively used in Geophysical Engineering. The changes in natural gamma radiation of alkaline volcanic are presented with maps. When these maps are examined, it is understood that K%, U-ppm and Th-ppm concentrations of Gölcük volcanic are higher than the world average values. The high potassium concentration draws even more attention. The high potassium content indicates that the local volcanic are ultrapotassic and contain lithospheric materials. In addition, since the radioactive element concentration will reflect the magmatic development, the volcanic stages in the region have been tried to be determined. The number of these stages was determined from the curves of the radioactive data from a purely geophysical engineering (numerical) point of view, and the study area was interpreted as consisting of three different phases. This finding is supported by the results of the articles on the aging studies of the samples taken as a result of observations. In addition to these, the ranges of radioactive elements belonging to these stages were determined.

show abstract

“…They have a characteristic geochemical behavior (e.g. the incompatible magmatic fractionation of U and Th in relative to K and the post-magmatic mobilization of U and K compared to Th) under magmatic, hydrothermal, and supergene conditions (e.g [ 16 , 18 , 23 , 24 , 37 , 47 , 55 , 59 , 60 ], making them significant tracers in the geochemical exploration and mapping the hydrothermal and supergene alteration zones (e.g; [ 1 , 13 , 20 , 26 , 27 , 36 , 46 , 48 , 49 , 51 , 58 , 64 , 66 , 67 ]. Apart from the other geochemical approaches such as fluid inclusions and whole rock geochemistry, the current work tries to build-up a radioelement ratio-based genetic scenario for vein-type uranium mineralizations by measuring Th/U, Th/K, and U/K ratios through host rocks, alteration zones, and U mineralized-veins.…”

Section: Introductionmentioning

confidence: 99%

Genetic implications of Th/U, Th/K, and U/K ratios for U mineralizations: A case study from El-Missikat and El-Erediya shear zones, Eastern Desert, Egypt

Abdel-Hakeem,

El-Tahir,

Zeid

et al. 2023

Geochem Trans

View full text Add to dashboard Cite

The current work is an attempt to reveal the possible utilization of the radiometric measurements to build-up a complete genetic scenario for magmatic, hydrothermal, and supergene uranium mineralization. For this purpose, ground gamma-ray survey was performed through the exploratory tunnels dug perpendicular to El-Missikat and El-Erediya shear zones, the Central Eastern Desert of Egypt. Contents of U, Th, and K were measured for the host pink granite (e.g., avg.15.94 U ppm, 35.62 Th ppm, and 6.63% K), alteration zones (brecciation, silicification, greisenization, kaolinization and hematitization) (e.g., avg. 124.01 U ppm, 63.67 Th ppm, and 3.13% K), and mineralized silica veins (e.g., avg. 312.65 U ppm, 92.22 Th ppm, and 2.62% K). All of these data were graphically represented as correlation plots of Th vs. U, Th/U vs. U, Th vs. K, and U/K vs. Th/K. The overall results indicate magmatic, hydrothermal, and supergene sources of El-Missikat and El-Erediya U mineralization. The magma-derived U contents are enclosed mainly in the pink granite that is mostly characterized by normal Th/U (2.5–5) and Th/K ratios (3–5*10–4). The hydrothermal processes through the alteration zones and mineralized silica veins are reflected by the weak correlation of Th with U (e.g. r = 0.13 and − 0.39), the strong negative correlation of Th/U ratio with U (e.g. r = − 0.82), 2.5˃Th/U˃0.1, Th/K˃5*10–4, Th/K < 3*10–4, and the strong positive correlation of U/K with Th/K (e.g. r = 0.91) as well as the occurrence of thorite, columbite, xenotime and hydrothermal zircon (0.5 > Th/U ≤ 0.1). Afterwards, the hydrothermal mineralization underwent some degrees of chemical weathering that resulted in supergene U mineralization whose fingerprints can be traced by the occurrence of secondary U minerals (e.g. kasolite and uranophane), Th/U ratios ≤ 0.1, and the weak correlation between Th/K and U/K (e.g. r = 0.39 and − 0.11).

show abstract

Determination of alteration zones and geological unit limits using natural radioactivity properties of Sandıklı-Suhut areas

Cited by 11 publications

References 34 publications

Distribution of natural radioactivity in different geological formations and their environmental risk assessment in Malaysia

Distribution of natural radioactivity in different geological formations and their environmental risk assessment in Malaysia

An Approach to Determine of the Formation Stages of Volcanism Using Natural Gamma-Ray Spectrometer from Geophysical Methods (Example of Gölcük Volcanism)

Genetic implications of Th/U, Th/K, and U/K ratios for U mineralizations: A case study from El-Missikat and El-Erediya shear zones, Eastern Desert, Egypt

Contact Info

Product

Resources

About