Seasonal geochemical signals in varves of the Lake Donguz-Orun bottom sediments from scanning X-ray fluorescence with the use of microcapillary X-ray optics

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• 作者：A. V. Darin ; Ya. V. Rakshun…
• 刊名：Bulletin of the Russian Academy of Sciences: Physics
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：79
• 期：1
• 页码：122-125
• 全文大小：689 KB
• 参考文献：1. Ojala, A.E.K., francus, P., Zolitschka, B., Besonen, M., and Lamoureux, S.F., / Quat. Sci. Rev., 2012, vol. 43, p. 45. CrossRef
  2. Dar’in, A.V., Kalugin, I.A., and Rakshun, Ya.V., / Bull. Russ. Acad. Sci. Phys., 2013, vol. 77, no. 2, p. 182. CrossRef
  3. Dar’in, A.V. and Rakshun, Ya.V., / Nauch. Vestn. Novosib. Gos. Tekh. Univ., 2013, no. 2 (51), p. 119.
  4. Darin, F., Kalugin, I., Darin, A., and Rakshun, Ya.V., / Acta Geol. Sinica. (Engl. Ed.), 2014, vol. 88, suppl. 1, p. 5. CrossRef
  5. Dar’in, A.V., Kalugin, I.A., Rakshun, Ya.V., et al., / Bull. Russ. Acad. Sci. Phys., 2013, vol. 77, no. 2, p. 185. CrossRef
  6. Kalugin, I.A., Dar’in, A.V., and Babich, V.V., / Dokl. Akad. Nauk, 2009, vol. 426, p. 520.
  7. Dar’in, A.V. and Kalugin, I.A., / Izv. Ross. Akad. Nauk. Ser. Geogr., 2012, no. 6, p. 63.
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Nuclear Physics, Heavy Ions and Hadrons
  Russian Library of Science
  
• 出版者：Allerton Press, Inc. distributed exclusively by Springer Science+Business Media LLC
• ISSN：1934-9432

文摘

The distribution of minor elements in a sample of bottom sediments from Lake Donguz-Orun, Northern Caucasus, is studied via scanning X-ray fluorescence microanalysis using beams of synchrotron radiation from the VEPP-3 storage ring. A beam of exciting radiation 15 μm in diameter is obtained with microcapillary X-ray optics to conduct detailed studies of the inner structure of individual varves. It is shown that the Rb/Sr ratio is related to particle size and could be a spring flood marker. Estimates of the current rate of sedimentation in the lake, based on counting visually discernible layers and from geochemical indicators, coincides with the isotopic data. Quantitative links between sediment composition and meteorological data (temperature and atmospheric precipitation) were found.