Stratigraphy and lithology
| Article # 9_2023 | submitted on 12/20/2022 displayed on website on 02/15/2023 |
| 22 p. | Shebolkin D.N. |
| 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. |
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| 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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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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Antoshkina A.I. Silurian sea-level and biotic events in the Timan-northern Ural region: sedimentological aspects. Acta Palaeontologica Sinica, 2007, vol. 46, pp. 23-27.
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.
Antoshkina A.I., Shebolkin D.N. Geneticheskaya interpretatsiya ooidnykh obrazovaniy (na primere venlokskikh otlozheniy yuzhnoy chasti gr. Chernysheva) [Genetic interpretation of ooid formations (on the example of Wenlockian strata in the southern part of Chernyshev swell)]. Geokhimiya litogeneza: materialy Rossiyskogo soveshchaniya s mezhdunarodnym uchastiem. Syktyvkar: IG Komi NTs UrO RAN, 2014, pp. 165-168.
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.
Calner M. Silurian global events at the tipping poind of climate change: Mass extinctions. Springer-Verlag. Berlin and Heidelberg, 2008, pp. 21-58.
Caputo M.V. Ordovician-Silurian glaciation and global sea-level changes. In: Landing E. & Johnson M.E. (eds.) Silurian cycles - Linkages of dynamic stratigraphy with atmospheric, oceanic, and tectonic changes. New York State Museum Bull, 1998, vol. 491, pp. 15-25.
Cramer B.D., Brett C.E., Melchin J.M., Männik P., Kleffner M.A., McLaughlin P.I., Loydell D.K., Munnecke A., Jeppsson L., Corradini C., Brunton F.R., Saltzman M.R. Revised correlation of Silurian Provincial Series of North America with global and regional chronostrati- graphic units and δ13Ccarb chemostratigraphy. Lethaia 44, 2011, pp. 185-202.
Cramer B.D., Loydell D. K., Samtleben C., Munnecke A., Kaljo D., Männik P., Martma T., Jeppsson L., Kleffner M.A., Barrick J.E., Johnson C.A., Emsbo P., Joachimski M.M., Bickert T., Saltzman M.R. Testing the limits of Paleozoic chronostratigraphic correlation via high-resolution (<500kyr) integrated conodont, graptolite, and carbon isotope (δ13Ccarb) bio-chemostratigraphy across the Llandovery-Wenlock (Silurian) boundary: Is a unified Phanerozoic time scale achievable? GSA Bulletin 122, 2010, pp. 1700-1716.
Cramer B.D., Saltzman M.R., Sequestration of 12C in the deep ocean during the early Wenlock (Silurian) positive carbon isotope excursion. Palaeogeography, Palaeoclimatology, Palaeoecology, 2005, vol. 219, pp. 333-349.
Flügel E. Microfacies of carbonate rocks: analysis, interpretation and application. Berlin: Heidelberg-Springer-Verlag, 2010, 976 p.
Graf D.L. Crystallographic tables for the rhombohedral carbonates. The American mineralogist, 1961, vol. 46, pp. 1283-1316.
Heise R. Diagenesis of a SeaMount oolite from the West Pacific, LEG 20. Deep Sea Drilling Project. University of California. 1973, pp. 363-387.
Jeppsson L. A new latest Telychian, Sheinwoodian and Early Homerian (Early Silurian) standard conodont zonation. Transactions of the Royal Society of Edinburgh. Earth Sciences, 1997, vol. 88, pp. 91-114.
Kaljo D., Martma T., Mannik P., Viira V. Implications of Gondvana glaciations in the Baltic Later Ordovician and Silurian and a carbon isotopic test of environmental cyclicity. Bull. de la Societe geologique de France, 2003, vol. 174, pp. 59-66.
Kuleshov V.N. Evolyutsiya izotopnykh uglekislotno-vodnykh sistem v litogeneze. Soobshchenie 1. Sedimentogenez i diagenez [Evolution of isotopic carbon dioxide-water systems in lithogenesis]. Litologiya i poleznye iskopaemye, 2001, no. 5, pp. 491-508.
Lehnert O., Eriksson M.E., Calner M., Joachimski M., Buggisch W. Concurrent sedimentary and isotopic indications for global climatic cooling in the Late Silurian. Acta Palaeontologica Sinica, 2007, vol. 46, pp. 249-255.
Mannik P., Antoshkina A.I., Beznosova T.M. The Lland-overy-Wenlock boundary in the Russian Arctic. Proc. Estonian Acad. Sci. Geol., 2000, vol. 49, pp. 104-111.
Mannik P., Martma T. The Llandovery-Wenlock boundary in Subporal Urals. Pan-Artic Palaeozoic Tectonics, Evolution of Basins and Fauna: Ichthyolith Issue, Special Publication, 6 - Syktyvkar: Institute of Geology, Komi Science Centre, Uralian Division of RAS, 2000, pp. 64-67.
Martma T., Brazauskas A., Kaljo D., Kaminskas D., Musteikis P. The Wenlock-Ludlow carbon isotope trend in the Vidukle core, Lithuania, and its relations with oceanic events. Geological Quarterly 49, 2005, pp. 223-234.
Scotese C.R. Paleogeograhfic Atlas. Paleomap Project. Calgary, 2004.
Shebolkin D.N. Dzhintuyskaya svita venloka na r. Iz'yayu (gryada Chernysheva) [The Wenlokian Dzintuy Formation on the Iz'yau river (Chernyshev Ridge)]. Prirodnoe geologicheskoe nasledie evropeyskogo severa Rossii: materialy Vserossiyskoy nauchnoy konferentsii. Syktyvkar, 2017, pp. 97-100.
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.
Silaev V.I., Khazov A.F. Izotopnoe disproportsionirovanie karbonatnogo ugleroda v protsessakh giprgenno-ekzogennoy peregruppirovki veshchestva zemnoy kory [Isotopic disproportionation of carbonate carbon in the processes of hypergenic-exogenous regrouping of substances of the earth's crust]. Syktyvkar: Geoprint, 2003, 41 p.
Veizer J. Trace elements and isotopes in sedimentary carbonates / Ed. R.J. Reeder. Carbonates: mineralogy and chemistry. Rev. Miner. Geochem. Miner. Soc. America, Washington, 1983, vol. 11, pp. 265-299.
Wenzel B., Joachimski M.M. Carbon and oxygen isotopic composition of Silurian brachiopods (Gotland/Sweden): palaeoceanographic implications. Palaeogeography, Palaeoclimatology; Palaeoecology, 1996, 122, pp. 143-166.