Uranium-Series Disequilibria in the Groundwater of the Shihongtan Sandstone-Hosted Uranium Deposit, NW China
| العنوان: | Uranium-Series Disequilibria in the Groundwater of the Shihongtan Sandstone-Hosted Uranium Deposit, NW China |
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| المؤلفون: | Haiming Qiao, Xinjian Peng, Maozhong Min, Mostafa Fayek, Jinping Wang |
| المصدر: | Minerals, Vol 6, Iss 1, p 3 (2015) Minerals; Volume 6; Issue 1; Pages: 3 |
| بيانات النشر: | MDPI AG, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | China, lcsh:QE351-399.2, 010504 meteorology & atmospheric sciences, Activity ratios, Geochemistry, chemistry.chemical_element, Aquifer, 010502 geochemistry & geophysics, 01 natural sciences, Uraninite, U-series disequilibrium, Spring (hydrology), groundwater, Geomorphology, 0105 earth and related environmental sciences, Uranium deposit, geography, geography.geographical_feature_category, lcsh:Mineralogy, Geology, Uranium, Geotechnical Engineering and Engineering Geology, sandstone-hosted uranium deposit, Lake water, chemistry, Groundwater |
| الوصف: | Uranium (U) concentration and the activities of 238U, 234U, and 230Th were determined for groundwaters, spring waters, and lake water collected from the Shihongtan sandstone-hosted U ore district and in the surrounding area, NW China. The results show that the groundwaters from the oxidizing aquifer with high dissolved oxygen concentration (O2) and oxidation-reduction potential (Eh) are enriched in U. The high U concentration of groundwaters may be due to the interaction between these oxidizing groundwaters and U ore bodies, which would result in U that is not in secular equilibrium. Uranium is re-precipitated as uraninite on weathered surfaces and organic material, forming localized ore bodies in the sandstone-hosted aquifer. The 234U/238U, 230Th/234U, and 230Th/238U activity ratios (ARs) for most water samples show obvious deviations from secular equilibrium (0.27–2.86), indicating the presence of water-rock/ore interactions during the last 1.7 Ma and probably longer. The 234U/238U AR generally increases with decreasing U concentrations in the groundwaters, suggesting that mixing of two water sources may occur in the aquifer. This is consistent with the fact that most of the U ore bodies in the deposit have a tabular shape originati from mixing between a relatively saline fluid and a more rapidly flowing U-bearing meteoric water. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bfd2b0f6e4fb30244bc09e822b2e314a http://www.mdpi.com/2075-163X/6/1/3 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....bfd2b0f6e4fb30244bc09e822b2e314a |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |