Shebolkin D.N.

drk80@mail.ru




Graduated from Syktyvkar State University (2002), specialization "regional geology".
Junior researcher of Institute of Geology, Komi Science Center, Ural Branch of the Russian Academy of Sciences.
Area of scientific interests: the study of the Silurian deposits of the Subpolar Urals and Chernyshev Ridge (lithology, geochemistry).
Author of 49 publications.
Stratigraphy and lithology
Article # 9_2023 submitted on 12/20/2022 displayed on website on 02/15/2023
22 p.
pdf The composition, structure and formation conditions of the Wenlockian strata in the southern part of the Chernyshev Ridge (Timan-Northern Ural region)
The results of lithogenetic, stratigraphic, geochemical studies of the Wenlockian strata in the southern part of the Chernyshev Ridge are considered. Positive deviations of δ13C associated with the global events Ireviken and Mulde have been established. The identified lithotypes of Wenlockian carbonate and carbonate-terrigenous rocks are combined into genetic groups according to the mechanism of formation. The isotopic composition of the rocks has a wide range of δ13С (-6.4...- 0.5‰) and δ18O (22.4-26.9‰) values. According to lithological and geochemical data, three time intervals are clearly distinguished, corresponding approximately to the early Shanewoodian, late Shanewoodian and Homerian. Sedimentary-diagenetic dolomites at the base and widespread ooid- stromatolite rocks association in the section indicate a reservoir with atypically normal marine hydrochemistry. A feature of the sedimentation conditions in the Wenlockian Epoch in the studied region was the extreme shallowness of the basin with limited water exchange.

Keywords: Wenlockian carbonate and carbonate-terrigenous rocks, isotopic composition δ13C and δ18O, sedimentation conditions, Chernyshev Ridge, Timan-Northern Ural region.
article citation Shebolkin D.N. Osobennosti sostava, stroeniya i usloviy formirovaniya venlokskikh otlozheniy yuzhnoy chasti gryady Chernysheva (Timano-Severoural'skiy region) [The composition, structure and formation conditions of the Wenlockian strata in the southern part of the Chernyshev Ridge (Timan-Northern Ural region)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2023, vol. 18, no. 1, available at: http://www.ngtp.ru/rub/2023/9_2023.html EDN: RCZQUL
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   Antoshkina A.I., Saldin V.A., Nikulova N.Yu., Yur'eva Z.P., Ponomarenko E.S., Sandula A.N., Kaneva N.A., Shmeleva L.A., Shebolkin D.N., Shadrin A.N., Inkina N.S. Rekonstruktsiya osadkonakopleniya v paleozoe Timano-Severoural'skogo regiona: napravleniya issledovaniy, rezul'taty, problemy i zadachi [Reconstruction of sedimentation in the Paleozoic Timan-Northern Ural region: research directions, results, problems and tasks]. Izvestiya Komi NTs UrO RAN, 2015, no. 1 (21), pp. 55-72.
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   Antoshkina A.I., Shebolkin D.N., Shmeleva L.A., Isaenko S.I. Biokhemogennye izvestnyaki i dolomity v nanometrovom masshtabe: znachenie dlya geologicheskoy letopisi [Biochemogenic limestones and dolomites at the nanometer scale: implications for the geological record]. Vestnik IG Komi NTs UrO RAN, 2019, no. 8, pp. 3-13.
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   Shebolkin D.N. Litogeneticheskaya tipizatsiya i usloviya obrazovaniya venlokskikh otlozheniy Pripolyarnogo Urala i gryady Chernysheva [Lithogenetic systematization and formation conditions of the Wenlockian sequences belonging to the Subpolar Urals and the Chernyshev Ridge]. Neftegazovaya Geologiya. Teoriya I Praktika, 2018, vol. 13, no. 2, available at: http://www.ngtp.ru/rub/2/20_2018.pdf DOI: https://doi.org/10.17353/2070-5379/20_2018
   Shebolkin D.N. Raznoobrazie stromatolitovykh postroek kak otrazhenie spetsifiki venlokskogo osadkonakopleniya v Timano-Severoural'skom regione [Variety of stromatolite structures as a reflection of the specifics wenlockian sedimentation in the Timan-Northern Ural region]. Geologiya rifov: materialy Vserossiyskogo litologicheskogo soveshchaniya. Syktyvkar, 2015, pp. 157-159.
   Shebolkin D.N., Mannik P. Venlokskie otlozheniya yuzhnoy chasti gryady Chernysheva (Timano-Severoural'skiy region) [The Wenlockian sections in the southern part of the Chernyshev Ridge (Timan–Northern Ural region)]. Litosfera, 2014, no. 1, pp. 33-40.
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Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 20_2018 submitted on 05/04/2018 displayed on website on 06/25/2018
22 p.
pdf  Lithogenetic systematization and formation conditions of the Wenlockian sequences belonging to the Subpolar Urals and the Chernyshev Ridge
The results of lithogenetic research of Wenlockian rocks of the Subpolar Urals and the southern part of the Chernyshev Ridge are presented. The lithotypes of the Wenlockian carbonate and carbonate-terrigenous rocks are divided into genetic groups according to the processes of their formation. During the Wenlockian the sedimentation basin was characterized by frequent fluctuations of sea level, facies, and by tectonic instability. We present paleogeographic profiles for early-, middle- and late Wenlockian time.

Keywords: carbonate rocks, lithotype, genetic types, Wenlockian, Subpolar Urals, Chenyshev Ridge, Timan-Northen Ural region.
article citation Shebolkin D.N. Litogeneticheskaya tipizatsiya i usloviya obrazovaniya venlokskikh otlozheniy Pripolyarnogo Urala i gryady Chernysheva [Lithogenetic systematization and formation conditions of the Wenlockian sequences belonging to the Subpolar Urals and the Chernyshev Ridge]. Neftegazovaya Geologiya. Teoriya I Praktika, 2018, vol. 13, no. 2, available at: http://www.ngtp.ru/rub/2/20_2018.pdf
DOI https://doi.org/10.17353/2070-5379/20_2018
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