Disequilibrium Uranium (234U/238U) in Natural Aqueous Objects and Climatic Variations: World Ocean
| العنوان: | Disequilibrium Uranium (234U/238U) in Natural Aqueous Objects and Climatic Variations: World Ocean |
|---|---|
| المؤلفون: | Sergey Zykov, Igor Tokarev, E. Yu. Yakovlev, I. A. Zimina |
| المصدر: | Geochemistry International. 59:895-902 |
| بيانات النشر: | Pleiades Publishing Ltd, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Aqueous solution, Disturbance (geology), Isotopes of uranium, Disequilibrium, chemistry.chemical_element, Structural basin, Uranium, Permafrost, Natural (archaeology), Geophysics, Oceanography, chemistry, Geochemistry and Petrology, medicine, Environmental science, medicine.symptom |
| الوصف: | Natural waters usually demonstrate the disturbance of radioactive equilibrium between parent 238U and and daughter 234U (usually, 234U/238U ≈ 0.8–3 in activities). The ratio of 234U/238U > 10 found in groundwaters can be explained by climatic variations, and it is result of 234U accumulation in permafrost rocks during cold periods and its more rapid loss compared to 238U during thawing. We tested this hypothesis for data on uranium isotope composition in water, and also chemo- and biogenic formations of the World Ocean. Most significant enrichment in 234U is discovered in the northern and internal seas during climatic warmings, which is consistent with an inferred influence of the permafrost formation and degradation on the anomalous increase of 234U/238U in groundwaters. Sampling of the Barents Sea shows that the uranium-234 enrichment in oceanic water increases with increase (a) of isolation from oceanic circulation system, (b) of the relative length of the coastal line, (c) and the contribution of continental waters to the chemical balance of the basin. |
| تدمد: | 1556-1968 0016-7029 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::f929297c7662c6117c64296b2595a957 https://doi.org/10.1134/s001670292109007x |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........f929297c7662c6117c64296b2595a957 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15561968 00167029 |
|---|