Mineralogy and Geochemistry of suspended matter collected by sedimentary traps in different parts of Lake Onego (the first data)

  • Strakhovenko V.D. 1
  • Belkina N.A. 2
  • Potakhin M.S. 2
  • Subetto D.A. 3
  • Ovdina E.A. 1
  • 1 V.S. Sobolev Institute of Geology and Mineralogy of the Siberian Branch of the Russian Academy of Sciences (RAS), 3 Akad. Koptyug Pr., Novosibirsk, 630090 Russia
    2 Northern Water Problems Institute of the Karelian Research Centre of the Russian Academy of Sciences, 50 Alexander Nevsky Pr., Petrozavodsk, 185030 Russia
    3 Herzen State Pedagogical University of Russia, 48 Moika Emb., Saint-Petersburg, 191186, Russia
Keywords: Lake Onego, suspended matter, sedimentary traps, bottom sediments, geochemistry, mineralogy


Data on the mineralogy and geochemistry of the suspended matter, the composition of its biogenic part, selected using sedimentation traps from different parts of Lake Onego, are presented. A comparative analysis of the suspended matter with the upper part of the bottom sediments of Lake was carried out. The deposited suspended matters consist of biogenic and lithogenic components. Biogenic components are represented by biogenic opal (fold valves of diatoms); lithogenic quartz, feldspar, illite and chlorite (in which the ratio is FeMg), but the suspended matter of the traps is significantly enriched with Hg relative to the bottom sediment.