Paleoenvironmental reconstruction for mineral groundwater area Marcial Waters (Lake Onega catchment)

  • Borodulina G. 1
  • Tokarev I. 2
  • Levichev M. 1
  • Yakovlev E. 3
  • Kamensky I.L. 4
  • Skiba V. V. 4
  • 1 Northern Water Problem Institute, Karelian Research Centre, Russian Academy of Sciences, Al. Nevsky St. 50, Petrozavodsk, 185030, Karelia, Russia
    2 St. Petersburg State University, Research Park, Resource Center for X-ray Diffraction Studies, Decabristov lane 16, Vasilyevsky Island, St. Petersburg, 1 99155, Russia
    3 Federal Center for Integrated Arctic Research of the Russian Academy of Sciences, Severnaya Dvina Emb. 109, Arkhangelsk, 163000, Russia
    4 Geological Institute, Kola Scientific Centre, Russian Academy of Sciences, Fersmana St. 14, Apatity, 184209, Murmansk region, Russia
Keywords: ferrous water; isotopic composition, paleoreconstruction, peat, sulfide oxidation

Abstract

Assessment of the conditions for the formation of Marcial waters was carried out on the basis of complex isotope-geochemical studies of water, peat deposits in the area of mineral water discharge and regional climate paleoreconstruction. The dependence of the chemical composition of water and flow rate of wells on weather and climatic conditions was discovered. Variations in the chemical composition of water do not coincide in time with a change in the flow rate of wells due to the mixing of modern waters of infiltration origin and, possibly, meltwater of permafrost. The evolution of the hydrogeological system of ferrous waters after the retreat of the glacial edge from the northwestern coast of Lake Onega is shown. It is shown that a permanent aquifer was formed at the end of the Preboreal time. The distribution of iron and uranium isotopes in the peat core reflects a change in the redox conditions due to climate change and the participation of meltwater in the groundwater flow.
Published
2020-08-27
Section
Articles