Geologicheskii Vestnik

Stratigraphic-paleontological studies and absolute geochronology are key tools for understanding the history of the Earth and its individual regions, as well as for deciphering the geological structure of specific areas. The reliability of paleontological and radiological dating is discussed, especially for the purposes of geological mapping. Based on reliability and geological significance, all dates (both radiological and paleontological) are divided into five categories: reference (R), reliable (N), probable (P), approximate (A), and unreliable (U). The criteria for assigning dates to these categories are discussed and examples from the history of the study of conodonts and geochronology in the Urals are given. The great role of Dr. V.A. Maslov and some other scientists in the stratigraphy studies of the Urals is noted.

stratigraphy, geochronology, geological mapping, conodonts, zircons, Paleozoic, reliability of dating, Doctor of Geological Sciences V.A. Maslov

• Andreichev V.L., Kulikova K.V., Larionov A.N. (2012) U-Pb age of Malyko plagiogranites (Polar Urals). Bulletin of the Komi Science Center, Ural Branch of the Russian Academy of Sciences. 4 (12), 60–66. (In Russian).
• Artyushkova O.V. (2018) "Conodont" stage in the development of stratigraphy in the Southern Urals (1970–2017). Fundamental and Applied Paleontology. Proceedings of the LXIV session of the Paleontological Society of the Russian Academy of Sciences (April 2–6, 2018, St. Petersburg). St. Petersburg: VSEGEI Cartography Factory. P. 16–18. (In Russian).
• Artyushkova O.V. (2014) Devonian conodonts from volcanogenic-siliceous deposits of the Magnitogorsk megazone of the Southern Urals. Ufa: DesignPress. 152 p. (In Russian).
• Artyushkova O.V., Zainullin R.I., Mavrinskaya T.M., Tagarieva R.Ch., Fazliakhmetov A.M., Yakupov R.R. (2015) In memory of a comrade. Geological collection. (12), 230–232. (In Russian).
• Artyushkova O.V., Maslov V.A. (1998) Paleontological substantiation of the stratigraphic subdivision of the pre-Famennian volcanogenic complexes of the Verkhneuralsk and Magnitogorsk regions. Ufa: IRAS IG USC RAS. 156 p. (In Russian).
• Artyushkova O.V., Yakupov R.R. (2021) Laboratory of Paleozoic Stratigraphy in the Service of the Fatherland. History of Science and Technology. (4), 12–18. (In Russian).
• Borozdina G.N., Ivanov K.S., Bogoyavlenskaya V.M. (2010) Stratigraphy of volcanogenic and volcanogenic-sedimentary deposits of the Salatim and Tagil zones of the Urals. Ekaterinburg: Ural Branch of the Russian Academy of Sciences. 152 p. (In Russian).
• Gurskaya L.I., Smelova L.V., Kolbantsev L.R., Lyakhnitskaya V.D., Lyakhnitsky Yu.S., Shakhova S.N. (2004) Platinoids of chromite-bearing massifs of the Polar Urals. Saint Petersburg: VSEGEI Publ. 306 p. (In Russian).
• Dobretsov N.L., Moldavantsev Yu.E., Kazak A.P., Ponomareva L.G., Savelyeva G.N., Savelyev A.A. (1977) Petrology and metamorphism of ancient ophiolites (on the example of the Polar Urals and Western Sayan). Novosibirsk: Nauka, Siberian Branch. 220 p. (In Russian).
• Dushin V.A. (2020) Geological structure and magmatism of the Shchuch'insky megablock (Polar Urals). Bulletin of the Ural State Mining University. 4 (60), 35–56. (In Russian).
• Dushin V.A., Burmako P.L., Ronkin Yu.L., Shishkin M.A. (2008) Composition and new age datings of metagabbroids of the Malyk complex in the Polar Urals. In the collection: Structural-compositional complexes and problems of geodynamics of the Precambrian of Phanerozoic orogens. Proceedings of the international scientific conference (III Readings in memory of S.N. Ivanov). P. 27–29. (In Russian).
• Dushin V.A., Serdyukova O.P., Malyugin A.A., Nikulina I.A. (2014) State Geological Map of the Russian Federation, Scale 1:200000. 2nd Edition. Sheet Q-42-VII, VIII (Obskaya): Explanatory Note / Ed. A.P. Kazak. St. Petersburg: Publishing House of St. Petersburg Map Factory VSEGEI. 384 p. (In Russian).
• Dushin V.A., Serdyukova O.P., Malyugin A.A., Nikulina I.A., Koz'min V.S., Burmako P.L., Popova O.M., Rybalko V.A., Abaturova I.V., Krasheninnikova M.L., Koz'mina L.I. (2009) State Geological Map of the Russian Federation at a scale of 1:200 000. 2nd ed. Sheet Q-42-I, II (Laboratory): explanatory note / ed. A. P. Kazak. St. Petersburg: Publishing House of St. Petersburg Map Factory VSEGEI. 372 p. (In Russian).
• Efimov A.A., Potapova T.A. (1996) Malyk gabbronorite-enderbite series of gabbroids of the Shchuchya synclinorium (Polar Urals). In the collection: Yearbook of the Institute of Geology and Geophysics for 1995. Ekaterinburg: Institute of Geology and Geophysics, Ural Branch of the Russian Academy of Sciences. P. 82–85. (In Russian).
• Zhuravlev A.Z., Zhuravlev D.Z., Kostitsyn Yu.A., Chernyshov I.V. (1987) Determination of the samarium-neodymium ratio for geochronological purposes. Geochemistry. (8), 1115–1129. (In Russian).
• Ivanov K.S. (2019) Main issues of the geological history and structure of the Urals. Ural Geological Journal. 2 (128), 3–55. https://www.ural-geol-j.net/2019-n2 (In Russian).
• Ivanov K.S. (2013) Once again about the role of overburdens in the geology of the Urals. Ural Geological Journal. 6 (96), 71–87. http://www.ural-geol-j.net/2013-n6 (In Russian).
• Ivanov K.S. (2021v) Research of the geology of Russia from Moscow to Yakutsk (about Yu.A. Volozh, A.V. Ryazantsev and V.S. Shkodzinsky – new laureates of the silver medal named after Corresponding Member of the Russian Academy of Sciences S.N. Ivanov "For outstanding results in the field of Earth sciences and dignity"). Ural Geological Journal. 3 (141), 59–68. (In Russian).
• Ivanov K.S. (2015) On the methodology of geological and stratigraphic studies of folded belts. Ural Geological Journal. 4 (106), 45–58. (In Russian).
• Ivanov K.S. (1987) Methods of searching for and identifying conodonts. Methodological recommendations. Sverdlovsk: Institute of Geology and Geochemistry, Ural Scientific Center, USSR Academy of Sciences. 117 p. (In Russian).
• Ivanov K.S. (1990) On trilobite finds in Western Mugodzhary. New data on the geology of the Urals, Western Siberia and Kazakhstan. Sverdlovsk: Ural Branch of the Russian Academy of Sciences. P. 45–49. (In Russian).
• Ivanov K.S. (2021a) In memory of Artur Antoninovich Krasnobaev (1935–2021). Ural Geological Journal. 1 (139), 88–105. (In Russian).
• Ivanov K.S. (2021b) In memory of geologist Viktor Grigorievich Korinevsky (1937-2021). Ural Geological Journal. 3 (141), 104–114. (In Russian).
• Ivanov K.S. (2024) In memory of geologist Viktor Nikolaevich Puchkov (1938-2024). Ural Geological Journal. 4 (160), 3–25. (In Russian).
• Ivanov K.S. (1988) Development of the Sakmara zone of the Southern Urals in the Ordovician (the Ural paleoocean is 480 million years old). Doklady Akademii Nauk SSSR. 299 (2), 428–432. (In Russian).
• Ivanov K.S., Babenko V.A., Nasedkina V.A. (1987) On the stratigraphy of volcanogenic strata of the Ordovician of the Sakmara zone of the Urals. New data on the geology of the Urals. Sverdlovsk: Ural Scientific Center of the USSR Academy of Sciences. P. 12–26.
• Ivanov K.S., Erokhin Yu.V., Hiller V.V., Rodionov N.V., Serov P.A. (2016) On the problem of the Precambrian of the eastern slope of the Urals (on the age and nature of the Selyankinskaya strata of the Ilmenogorsk zone). Regional Geology and Metallogeny. 68, 21–29. (In Russian).
• Ivanov K.S., Puchkov V.N. (1984) Geology of the Sakmara zone of the Urals (new data). Preprint. Sverdlovsk: UC USSR Academy of Sciences. 86 p. (In Russian).
• Ivanov K.S., Puchkov V.N. (2022) Structural and formational zones of the Ural folded belt: data review and development of new ideas. Geotectonics. 6, 78–113. (In Russian).
• Ivanov K.S., Puchkov V.N., Babenko V.A. (1990) Finds of conodonts and graptolites among metamorphosed strata in the Southern Urals. Doklady Akademii Nauk SSSR. 310 (3), 676–679. (In Russian).
• Ivanov K.S., Puchkov V.N., Nasedkina V.A., Pelevin I.A. (1989) First results of the revision of the stratigraphy of the Polyakov suite based on conodonts. Yearbook-1988. Sverdlovsk: IGG UrB AN USSR. P. 12–13. (In Russian).
• Ivanov K.S., Pushchaev A.M., Puchkov V.N. (1984) New data on the stratigraphy and tectonics of the eastern edge of the Magnitogorsk zone of the Urals. New data on the paleontology and biostratigraphy of the Paleozoic of the Urals. Sverdlovsk: Ural Scientific Center of the USSR Academy of Sciences. P. 51–70. (In Russian).
• Ivanov K.S., Snigireva M.P., Myannik P., Borozdina G.N. (2004) Conodonts and Biostratigraphy of Volcanic-Siliceous Deposits of the Early Paleozoic Revealed by the Ural Superdeep Well SG-4. Litosfera. 4, 89–101. (In Russian).
• Ivanov K.S., Fedorov Yu.N., Ronkin Yu.L., and Erokhin Yu.V. (2005) Geochronological Studies of the Basement of the West Siberian Oil and Gas Megabasin: Results of 50 Years of Research. Litosfera. 3, 117–135. (In Russian).
• Korinevsky V.G. (1989) Paleozoic ophiolites of the Southern Urals. Geotectonics. 2, 34–44. (In Russian).
• Kostitsyn Yu.A. (2004) Sm-Nd and Lu-Hf isotope systems of the Earth: do they correspond to chondrites? Petrology. 12 (5), 451–466. (In Russian).
• Krasnobaev A.A. (1985) Problems of Precambrian geochronology in the Urals // In the book: “Yearbook-1984”. Sverdlovsk: Ufa Scientific Center of the USSR Academy of Sciences. P. 26–30. (In Russian).
• Kulagina E.I., Kochetova N.N., Artyushkova O.V., Mavrinskaya T.M., Maslov V.A., Puchkov V.N., Baryshev V.N., Gorozhanin V.M., Gorozhanina E.N., Nikolaeva S.V., Kononova L.I., Alekseev A.S., Barskov I.S., Goreva N.V., Gatovsky Yu.A., Ivanova R.M., Kucheva N.A., Stepanova T.I., Chernykh V.V., Misens G.A., Yarkova A.V., Moseichuk V.M., Kashina L.V. Pazukhin (2013) Vladimir Nikolaevich (1951–2013). Geological collection. 10, 283–285. (In Russian).
• Maslov V.A., Artyushkova O.V. (2002) Stratigraphy and correlation of Devonian deposits of the Sibay-Baimak region of Bashkiria. Ekaterinburg: IG Ufa Scientific Center of the Russian Academy of Sciences. 199 p. (In Russian).
• Maslov V.A., Artyushkova O.V. (2010) Stratigraphy and correlation of Devonian deposits of the Magnitogorsk megazone of the Southern Urals. Ufa: DesignPoligrafService. 288 p.
• Maslov V.A., Artyushkova O.V. (2000) Stratigraphy of Paleozoic formations of the Uchalinsky region of Bashkiria. Ufa. 123 p. (In Russian).
• Maslov V.A., Artyushkova O.V., Baryshev V.N. (1987а) Stratigraphic subdivision of Devonian deposits of the Magnitogorsk megasynclinorium. Soviet geology. 9, 61–71. (In Russian).
• Maslov V.A., Artyushkova O.V., Baryshev V.N. (1984) Stratigraphy of ore-bearing Devonian deposits of the Sibay region. Ufa: IG Ufa Scientific Center of the Russian Academy of Sciences. 100 p. (In Russian).
• Maslov V.A., Artyushkova O.V., Mavrinskaya T.M., Yakupov R.R. (1998) Ordovician deposits of the Southern Urals. Paleogeography of the Vendian – Early Paleozoic of Northern Eurasia. Ekaterinburg. P. 67–74. (In Russian).
• Maslov V.A., Artyushkova O.V., Pavlov V.V., Baryshev V.N. (1987b) Substantiation of the age of conodont fauna of volcanogenic-sedimentary strata of the Uzunkyr zone (Yuldashevskaya structure area). Preprint. Ufa. 31 p. (In Russian).
• Maslov V.A., Cherkasov V.L., Tishchenko V.T. Smirnova I.A., Artyushkova O.V., Pavlov V.V. (1993) Stratigraphy and correlation of volcanogenic complexes of the main copper pyrite regions of the Southern Urals. Ufa: UC RAS. 216 p. (In Russian).
• Ovchinnikov L.N., Stepanov A.I., Voronovsky S.N. (1981) On the causes of distortion of potassium-argon dates. Problems of geochronology and isotope geology. Moscow: Nauka. P. 3–31. (In Russian).
• Plotitsyn A.N. (2024) In memory of Vladimir Stepanovich Tsyganko (13.02.1938–28.09.2024). Herald of Geosciences. 9 (357), 42–44. (In Russian).
• Prokin V.A., Seravkin I.B., Buslaev F.P., Snachev V.I., Puchkov V.N., Maslov V.A., Ivanov K.S., Kontar’ E.S., Dushin V.A., Elokhin V.A., Tsymbalyuk A.V., Yazeva R.G., Vostroknutov G.A., Kholodnov V.V., Kabanova L.Ya., Nasedkin A.P., Papulov N.B., Ivanov S.N., Necheukhin V.M., Lyadsky P.V. (1992) Copper pyrite deposits of the Urals: formation conditions. Ekaterinburg: Ural Branch of the Russian Academy of Sciences. 312 p. (In Russian).
• Puchkov V.N. (1973) Finds of conodonts in the Paleozoic of the Northern Urals and their stratigraphic significance. Doklady USSR Academy of Sciences. 209 (3), 668–670. (In Russian).
• Puchkov V.N., Ivanov K.S. (1985) First information on the volcanogenic-siliceous strata of the Ordovician in the east of the Urals. Doklady USSR Academy of Sciences. 285 (4), 966–970. (In Russian).
• Puchkov V.N., Ivanov K.S. (2020) Tectonics of the Northern Urals and Western Siberia: General History of Development. Geotectonics. 1, 41–61. (In Russian).
• Ronkin Yu.L., Maslov A.V., Sindern S. (2020) U-Pb (ID-TIMS) geochronological method and SIMS techniques for in situ zircon dating: possibilities and limitations. Lithosphere. 20 (3), 411–431. (In Russian).
• Ronkin Yu.L., Stepanov A.I. (2013) L.N. Ovchinnikov and methods of isotope geology in the Urals and the USSR: on the centenary of his birth. Minerals: structure, properties, research methods. 5, 157–159. (In Russian).
• Ronkin Yu.L., Chaschukhin I.S. (2024) The Kraka lherzolite massifs (Southern Urals): geochemistry, geochronology, genesis, geodynamics. Proceedings of the Komi Science Centre of the Ural Branch of the Russian Academy of Sciences. 3 (69), 5–17. (In Russian).
• Ryazantsev A.V., Dubinina S.V., Kuznetsov N.B., Belova A.A. (2008) Ordovician structural-formational complexes in allochthons of the Southern Urals. Geotectonics. 5, 49–78. (In Russian).
• Sergeev S.A., Pushkarev Yu.D., Lokhov K.I., Sergeev D.S. (2015) Review of modern methods of isotope geochronology (part of the Geochronological Atlas) St. Petersburg: VSEGEI. 31 p. https://karpinskyinstitute.ru/ru/info/geochron-atlas/geoch-atlas_obzor.pdf (In Russian).
• Smirnov V.N., Borozdina G.N., Desyatchichenko L.I., Ivanov K.S., Medvedeva T.Yu., Fadeicheva I.F. (2006) On the Time of the Opening of the Ural Paleoocean. Geology and Geophysics. 47 (6), 755–761. (In Russian).
• Stratigraphic schemes of the Urals (Precambrian, Paleozoic) (1993). Ekaterinburg: Ural. geological-surveying expedition, 152 sheets of schemes. (In Russian).
• Fore G. (1989) Fundamentals of Isotope Geology. Moscow: Mir. 590 p. (In Russian).
• Shanin L.L., Volkov V.N., Litsarev M.A., Arakelyants M.M., Goltsman Yu.V., Ivanenko V.V., Bairova E.D. (1979) Criteria for the reliability of radiological dating methods. Ed. A.M. Borsuk. Moscow: Nauka. 207 p. (In Russian).
• Shatskiy V.S., Simonov V.A., Yagouts E., Kozmenko O.A., Kurenkov S.A. (2000) New data on the age of eclogites of the Polar Urals. Doklady USSR Academy of Sciences. 371 (4), 519–523. (In Russian).
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