Phosphate Minerals in the Bottom Sediments of Lake Onega from the Upper Neopleistocene to the Holocene

Authors

  • Malov V.I. 1, 2
  • Strakhovenko V.D. 1, 2
  • Subetto D.A. 2
  • Belkina N.A. 2, 3
    • 1 V.S. Sobolev Institute of Geology and Mineralogy of the Siberian Branch of the Russian Academy of Sciences (RAS), Prospekt Akademika Koptyga, 3, Novosibirsk, 630090, Russia
    2 Herzen State Pedagogical University of Russia, Naberezhnaya Moyki, 48, St. Petersburg, 191186, Russia
    3 Northern Water Problems Institute of the Karelian Research Centre of the Russian Academy of Sciences, Prospekt Alexandra Nevskogo, 50, Petrozavodsk, 185030, Russia

DOI:

https://doi.org/10.31951/2658-3518-2025-A-4-362

Keywords:

Lake Onega, bottom sediments, phosphorus, minerals, vivianite

Abstract

This study investigates phosphorus-bearing minerals in the bottom sediments of Lake Onego and its proglacial precursor. The composition of phosphorus mineral phases differs in the Late Neopleistocene glaciolacustrine and Holocene lacustrine deposits. The former are dominated by fluorapatite, monazite, and xenotime, whereas the Holocene sediments,represented by fine-grained lacustrine muds,contain significant amounts of vivianite and Fe–Mn hydroxides. These differences revealed changes in phosphorus sources and conditions of its accumulation, which is important for assessing the trophic state of Lake Onega at all stages of its development under climatic and anthropogenic changes.

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Published

2025-08-31

Issue

2025: №4 (SI:8VBC)

Section

Articles

License

Copyright (c) 2025 Limnology and Freshwater Biology

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Creative Commons License
This work is distributed under the Creative Commons Attribution-NonCommercial 4.0 International License.