Institute of Geology, Karelian Research Center, Russian Academy of Sciences, Petrozavodsk, Karelia:

M. M. Filippov, Chief Researcher, Doctor of Geologo-Mineralogical Sciences, filipov@krc.karelia.ru
Yu. E. Deines, Junior Researcher

The problem of reproduction of reserves of high carbon rocks (shungites and maksovites) in the Onega structure is considered. Based on the diapir model, it was concluded that in the central part of the Tolvuya structure there are deposits that have been preserved from erosion, and therefore significantly larger in reserves than the well-known Maksovo deposit. The prerequisites for substantiation were the features of the geological structure of the Tolvuya syncline, theoretical ideas about the system of genetically related dome structures, experimental data on the parameters of the system formed along the sixth schungite-bearing horizon of the upper subformation of the Zaonega formation. It is shown that in other synclinal structures of the second order there is a high probability of discovery of similar deposits.

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6. Filippov M. M. Shungite Rocks of the Onega Structure. Petrozavodsk : KarNTs RAN, 2002. 282 p.
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12. Martin A. P., Prave A. R., Condon D. J., Lepland A., Fallick A. E. et al. Multiple Palaeoproterozoic carbon burial episodes and excursions. Earth and Planetary Science Letters. 2015. Vol. 424. pp. 226–236.
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14. Filippov M. M., Esipenko O. A. Paleo-Proterozoic geologo-geophysical marking horizons of the Onega structure. Petrozavodsk : KarNTs RAN, 2016. 257 p.