The spatio-temporal distribution of elements in the bottom sediments of Lake Onego and small lakes located on the catchment area of Onego Ice Lake

Authors

  • Vera D. Strakhovenko Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences (IGM SB RAS), 3 Akad. Koptyug Ave., Novosibirsk, 630090, Russia; Novosibirsk State University, 2 Pirogova st., Novosibirsk, 630090, Russia
  • Natalia A. Belkina Northern Water Problems Institute of the Karelian Research Centre of the Russian Academy of Sciences https://orcid.org/0000-0002-9928-022X
  • Natalia A. Efremenko Northern Water Problems Institute of the Karelian Research Centre of the Russian Academy of Sciences
  • Maxim S. Potakhin Northern Water Problems Institute of the Karelian Research Centre of the Russian Academy of Sciences https://orcid.org/0000-0002-2630-2176
  • Dmitry A. Subetto Herzen State Pedagogical University of Russia https://orcid.org/0000-0002-3585-8598
  • Victor I. Malov V.S. Sobolev Institute of Geology and Mineralogy of the Russian Academy of Sciences (IGM SB RAS) https://orcid.org/0000-0002-2175-3971
  • Ekaterina A. Ovdina V.S. Sobolev Institute of Geology and Mineralogy of the Russian Academy of Sciences (IGM SB RAS) https://orcid.org/0000-0002-4920-8860

Abstract

The work presents the results of a comprehensive mineralogical and geochemical study of Late Pleistocene-Holocene bottom sediments of Lake Onego and small lakes located in the territory belonging to Onego Ice Lake. Methods of ICP-MS, atomic absorption spectrometry, X-ray fluorescence analysis, X-ray phase method (XRD), scanning electron microscopy (SEM), and gamma-spectrometric method were used. The geochemical composition of the terrigenous fraction reflects the mineral composition and is permanent for the all bottom sediments cores of Lake Onego and small lakes during time interval about 12,000 years. For the first time, detailed mineralogical studies of sediments have shown that the composition of mineral associations of the terrigenous fraction is similar in the bottom sediment cores of Lake Onego and small lakes. The association of authigenic minerals in bottom sediments is distinguished by the presence of pyrite framboids in small lakes, and crystalline aggregates of Fe-phosphate, ferruginous illites and chlorites in Lake Onego. Sedimentation rates established by the study of correlations the indicator technogenic radioisotope 137Cs and atmospheric 210Pb. In the bottom sediments of small lakes, sedimentation rates vary from lake to lake, as well as in various areas of Lake Onego in the range from 0.05 cm/year to 0.30 cm/year.

Keywords:

Lake Onego, small lakes, bottom sediments, mineralogy, geochemistry, sedimentation rate, 210Pb, 137Cs

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Published

2023-12-01

How to Cite

Strakhovenko, V. D. (2023) “The spatio-temporal distribution of elements in the bottom sediments of Lake Onego and small lakes located on the catchment area of Onego Ice Lake”, Vestnik of Saint Petersburg University. Earth Sciences, 68(4). Available at: https://escjournal.spbu.ru/article/view/14223 (Accessed: 16 May 2024).

Issue

Vol. 68 No. 4 (2023)

Section

Articles

License

Articles of "Vestnik of Saint Petersburg University. Earth Sciences" are open access distributed under the terms of the License Agreement with Saint Petersburg State University, which permits to the authors unrestricted distribution and self-archiving free of charge.