Uranium migration history in the igneous and metamorphic rocks of Solaf-Umm Takha area, based on multi-variate statistical analysis and favorability indices, central south Sinai, Egypt.

Attia, Tamer E.; Shendi, El-Arabi H.

doi:10.9790/0990-0150920

Cited by 6 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The type and the amount of uranium mobilization in the studied rocks are estimated through several steps using equations of Benzing Uranium Institute of China (1977) and CNNC (1993)), these equations are examined by several authors (Abu‐Deif et al ., 2001; Asfahani et al ., 2007, 2010, 2016; Assran et al ., 2012; Attia and Shendi, 2013) as follows:

U0 = eTh * eU / eTh,

where U0 is the original uranium content, eTh is the average of the equivalent thorium content in certain geological unit in ppm and eU/eTh is the average of regional eU/eTh ratio in different geological units.

Um = Up - U0

where Um is the amount of the mobilized uranium and Up is the average of the present uranium content in certain geologic unit. Two states of Um are expected; (a) if Um > 0, U could be gained or mobilized into the geologic body during late evolution (migration in) and (b) if Um < 0, U could be lost from the geologic body during late evolution (migration out).

normalP = Um / Up * 100,

where, P is the uranium migration rate.…”

Section: Resultsmentioning

confidence: 99%

“…The type and the amount of uranium mobilization in the studied rocks are estimated through several steps using equations of Benzing Uranium Institute of China (1977) and CNNC (1993)), these equations are examined by several authors (Abu-Deif et al, 2001;Asfahani et al, 2007Asfahani et al, , 2010Asfahani et al, , 2016Assran et al, 2012;Attia and Shendi, 2013) as follows:…”

Section: Uranium Mobilizationmentioning

confidence: 99%

See 1 more Smart Citation

Significance of radioelements distribution in the Precambrian rocks of Jabel Sayid, western Saudi Arabia, using spectrometric and geochemical data

et al. 2020

View full text Add to dashboard Cite

In situ gamma‐ray spectrometry measurements were carried out using RS‐230 BGO spectrometer over an area of 9.4 km2. One hundred and seventy eight spectrometric points were collected along parallel profiles with spacing 325 m in the Easting X direction and Northing Y direction. The results are treated statistically to determine the minimum, maximum, arithmetic mean (X), SD (S), and coefficient of variability (CV %). The spectrometric survey revealed the presence of radioactive zones in the aplite‐pegmatite with maximum eU content of 1,550 ppm and eTh of 7,974 ppm, whereas alkali granite has an average eU content of 12 ppm and eTh of 34 ppm. Felsite has an average eU and eTh close to that of alkali granite, 11 and 32 ppm, respectively. Pegmatite veins cutting alkali granite have high values of eU and eTh, an average of 34 and 101 ppm, respectively. The metamorphosed volcanic rocks of the Mahd Group demonstrate the lowest radioactivity with an average eU content of 0.8 ppm and eTh of 1.6 ppm. These rocks partly show evidences of post‐magmatic alteration processes, for example, silicification, sericitization, and oxidation. Excluding metavolcanics, the strong positive correlation between eU and eTh for the different rock varieties reflects their geochemical coherence during magma crystallization and indicates that both elements are largely accommodated into accessory minerals and were not disturbed by alteration. The CV values of the different rock units show normal distribution, where all the percentages of CV values are less than 100, with the exception of eU of felsite that shows CV % value slightly higher than 100. The aplite‐pegmatite, alkali granite, and the associated pegmatite veins show negative value of uranium outward migration, but are still the most favorable host rocks for uranium and thorium mineralization. A tentative interpretation of such contradiction suggests that uranium is largely accommodated into accessory minerals and only limited labile uranium redistribution has occurred and uranium was precipitated in association with alteration products. This interpretation is supported by the presence of kasolite Pb(UO2)SiO4.(H2O), along the fractured zones and quartz veins in the aplite‐pegmatite. The limited uranium migration in the study area was also revealed by the low weathering rate estimated by the calculations of chemical indices of alteration.

show abstract

U0 = eTh * eU / eTh,

Um = Up - U0

normalP = Um / Up * 100,

where, P is the uranium migration rate.…”

Section: Resultsmentioning

confidence: 99%

“…The type and the amount of uranium mobilization in the studied rocks are estimated through several steps using equations of Benzing Uranium Institute of China (1977) and CNNC (1993)), these equations are examined by several authors (Abu-Deif et al, 2001;Asfahani et al, 2007Asfahani et al, , 2010Asfahani et al, , 2016Assran et al, 2012;Attia and Shendi, 2013) as follows:…”

Section: Uranium Mobilizationmentioning

confidence: 99%

Significance of radioelements distribution in the Precambrian rocks of Jabel Sayid, western Saudi Arabia, using spectrometric and geochemical data

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It is also able to reduce the noise or suppress the influence of less important data components, where weak or no correlations between variables exist (Raychaudhuri et al 1999). It is not only able to delineate the surface distribution of the main source of radiation, but it is also able to define its underlying structure (Attia and Shendi 2013). The First Principal Component (PC1) was computed using the following equation with five positive weights of the variables K, DR, eTh, eTh/K and eU and two negative weights eU/K and eU/eTh: Two orthogonal profiles, AB and CD were plotted and are illustrated in Figure (7) to show the lateral changes of eU, eTh and DR across the rectangular anomaly.…”

Section: Resultsmentioning

confidence: 99%

Application of Gamma-ray Spectrometry in Discovering the Granitic Monument of King Pepi I: A Case Study from Hierakonpolis, Aswan, Egypt

Aziz

Attia

McNamara

et al. 2018

Pure Appl. Geophys.

View full text Add to dashboard Cite

The current survey aimed to relocate the so-called granitic 'stela' inscribed for King Pepi I. The monument was originally discovered in 1897-98 by British Egyptologists excavating on an ancient mound located in the floodplain at the archaeological site of Hierakonpolis (modern Kom el-Ahmar), in the Aswan Governorate of Egypt. The original excavators were unable to remove it owing to its great weight and the monument was therefore left at the site. It remained partly exposed until 1989, when it was reburied in order to provide some protection from seasonal fluctuations in the water table. The exact location of the 'stela' was then lost, as the site is situated in the center of the modern village of Kom el-Gemuwia and is covered with halfa grass and other debris. As part of a new project to conserve and record this historic monument and other stone relics on this waterlogged site by the Hierakonpolis Expedition of the Ashmolean Museum, University of Oxford, UK, a geophysical approach was used to establish their current locations. A detailed Gamma Ray Spectrometry survey was conducted across the area suggested by the archeologists. The measurements were analyzed and plotted in the form of maps, which were helpful in selecting certain locations for examination. The results of limited field excavations confirmed that the localized high Thorium concentration anomalies were mainly related to the presence of the buried granite block. These results suggest that this method could be useful in for the detection of granitic monuments at similar sites.

show abstract

“…Both airborne and land-borne gamma-ray spectrometer studies are usually used for purposes such as uranium prospecting, surficial geological mapping, and soil mapping in agriculture, stratigraphic analyses of geological formations, geothermal research, and metallic mining research [9]. There are many scientific studies related to the definition of the natural radiation level in rock and soils [10][11], lithological discrimination-related studies [12][13][14], radionuclide concentrations in volcanic rocks and granitic plutons [15][16][17][18][19], radioactive areas of mineralization [20][21][22], possible uranium migration areas and the migration paths in granitic rock [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Uranium migration and radioactive characteristics of the Sarıçiçek and Sarıhan Granodiorites

Altundaş

Çınar

2023

Turkish Journal of Engineering

View full text Add to dashboard Cite

In the study, in situ gamma-ray measurements were applied on Sarıhan and Sarıçiçek granodiorites and the formations surrounding these units. The concentrations of radionuclide (eU(ppm), eTh(ppm), K(%)) and dose rate values were measured in total at 532 points (265 and 267 measurements were taken in Gümüşhane and Bayburt, respectively.) in both areas with a duration of 5 minutes at each measurement point. By using the obtained concentration data, the radioelement ratios (eU/eTh, eU/K, and eTh/K) give information about the origins of the rocks belonging to the study areas, the geochemical indicators (Ume, F parameter, and eU-(eTh/3,5) rate ) showing the uranium mobility and the radioelement concentrations were calculated and mapped. While the average K, eU, and eTh concentrations for Sarıçiçek granodiorite were calculated as 2.98%, 3.15 ppm, and 12.45 ppm, Sarıhan granodiorite was 1.83%, 2.73 ppm, and 13.6 ppm, respectively. The higher radioactivity values were obtained than the surrounding formations consisting of basaltic, sedimentary, and ultramafic rock combinations on the granodiorite masses. In the classification made according to radioelement ratios, it is concluded that the rocks in the study areas are formed as a mixture of the upper mantle and crustal materials. In both study areas, there is uranium transport from the granodioritic masses to the surrounding rocks, and accordingly, the rocks in the surrounding formation are enriched in uranium. As a result, radioactivity levels, rock formation origins, and uranium transport of both granodioritic masses and rocks in the surrounding formations were determined by evaluating together with the radioelement concentration values and ratios and migration parameters, and the studied areas were characterized by associating them with geology in the light of radioactive data.

show abstract

Uranium migration history in the igneous and metamorphic rocks of Solaf-Umm Takha area, based on multi-variate statistical analysis and favorability indices, central south Sinai, Egypt.

Cited by 6 publications

References 14 publications

Significance of radioelements distribution in the Precambrian rocks of Jabel Sayid, western Saudi Arabia, using spectrometric and geochemical data

Significance of radioelements distribution in the Precambrian rocks of Jabel Sayid, western Saudi Arabia, using spectrometric and geochemical data

Application of Gamma-ray Spectrometry in Discovering the Granitic Monument of King Pepi I: A Case Study from Hierakonpolis, Aswan, Egypt

Uranium migration and radioactive characteristics of the Sarıçiçek and Sarıhan Granodiorites

Contact Info

Product

Resources

About