litosphereЛитосфераLITHOSPHERE (Russia)1681-90042500-302XA.N. Zavaritsky Institute of Geology and Geochemistry10.24930/1681-9004-2023-23-6-950-969litosphere-1981Research ArticleСтатьиArticlesБиостратиграфическое расчленение по конодонтам пражских отложений западного склона Южного Урала на примере разреза МиндигуловоPragian conodont biostratigraphy of the western slope of the Southern Urals (Mindigulovo section)МавринскаяТ. М.MavrinskayaT. M.

450077, г. Уфа, ул. К. Маркса, 16/2

16/2 K. Marx st., Ufa 450077

stpal@ufaras.ruШариповаА. Р.SharipovaA. R.

450077, г. Уфа, ул. К. Маркса, 16/2

16/2 K. Marx st., Ufa 450077

stpal@ufaras.ruИнститут геологии УФИЦ РАНРоссияInstitute of Geology, UFRC RASRussian Federation202329122023236950969Copyright © Мавринская Т.М., Шарипова А.Р., 20242024Мавринская Т.М., Шарипова А.Р.Mavrinskaya T.M., Sharipova A.R.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.lithosphere.ru/jour/article/view/1981

Объект исследования. Пражские конодонты из разреза Миндигулово на западном склоне Южного Урала. Цель. Биостратиграфическое расчленение пражских отложений по конодонтам. Материалы и методы. Исследование основано на биостратиграфическом методе: выделение конодонтов по традиционной методике, таксономическое определение конодонтовых ассоциаций из пражских отложений, построение и корреляция зональной шкалы. Результаты. Впервые в широтном течении р. Белой пражские отложения охарактеризованы конодонтами в разрезе Миндигулово. Выявлена последовательность подразделений конодонтов в ранге слоев с фауной: слои с Gondwania irregularis, Latericriodus steinachensis, слои с Pelekysgnathus serratus, слои с Gondwania profunda, Pseudogondwania kindlei и слои с Polygnathus cf. pireneae. Выводы. Установленные подразделения конодонтов непосредственно сопоставляются со стандартной зональной шкалой пражского яруса. Полученная коллекция конодонтов состоит из таксонов, характеризующих филетическую линию Gondwania irregularis–Gondwania profunda, Pseudogondwania kindlei–Eognathodus zeravshanicus, Polygnathus pireneae, установленных в разрезах пражских отложений Австралии и Южном Тянь-Шане. Совместное присутствие в разрезе Миндигуловский глубоководной фауны семейства Eognathodidae и мелководной Icriodontidae дает возможность проводить корреляции разнофациальных разрезов.

Research subject. Pragian conodonts from the Mindigulovo section on the western slope of the South Urals. Aim. Conodont-based biostratigraphy of the Pragian deposits. Materials and methods. This study is based on the biostratigraphic method: identification of conodonts using conventional techniques, recognition of Pragian conodont associations, zonal scale proposal and correlation. Results. The Pragian beds in the Mindigulovo Section in the latitudinal flow of the Belaya River are characterized using conodonts for the first time. The following conodont-based subdivisions at the rank of beds with fauna are recognized (from bottom to top): Beds with Gondwania irregularis, Latericriodus steinachensis, Beds with Pelekysgnathus serratus, Beds with Gondwania profunda, Pseudogondwania kindlei and Beds with Polygnathus cf. pireneae. Conclusions. The recognized conodont-based units can be directly correlated with the standard zonal scale of the Pragian. The conodont assemblage studied contains taxa characterizing the Gondwania irregularis–Gondwania profunda, Pseudogondwania kindlei–Eognathodus zeravshanicus, Polygnathus pireneae lineage, also known in the Pragian successions of Australia and the South Tien Shan. The co-occurrence of the deep-water family Eognathodidae and the shallow-water Icriodontidae in the Mindigulovo Section enables the correlation of different facies sections.

Южный Уралнижний девонпражский ярускуламатский горизонткорреляцияконодонтыSouthern UralsLower DevonianPragian stageKulamat Horizon (Regional Substage)correlationconodontsРабота выполнена в рамках темы государственного задания “Основные события фанерозоя: палеонтология, стратиграфия, корреляция”, № НИОКТР FMRS-2022-0010The work was carried out within the framework of the state assignment “The main events of the Phanerozoic: paleontology, stratigraphy, correlation”, No. NIOKTR FMRS-2022-0010ReferencesЕлкин Е.А., Изох Н.Г., Веддиге К., Ерина М.В., Валенсуэла-Риос Х.И., Апекина Л.С. (2011) Филогения эогнатодонтид и полигнатид из разрезов Китабского государственного геологического заповедника (Зеравшано-Гиссарская горная область, Узбекистан) как основа для совершенствования пражско-эмсской стандартной зональной шкалы по конодонтам. Новости палеонтологии и стратиграфии. Приложение к журналу “Геология и геофизика”, 52(15), 37-45.Bardashev I.A., Weddige K., Ziegler W. (2002) Phylomorphogenesis of some Early Devonian platform conodonts. Senckenbergiana Lethaea, 82(2), 375-451.Легенда Южно-Уральской серии листов Госгеолкарты Российской Федерации м-ба 1 : 200 000 (издание второе). (1999) СПб.: ВСЕГЕИ.Becker R.T., Gradstein F.M., Hammer O. (2012) Devonian Period. (Eds F.M. Gradstein, J.G. Ogg, M.D. Schmitz, G.M. Ogg). Geologic Time Scale, 1(20). Amsterdam: Elsevier, 559-601. https://doi.org/10.1016/B978-0-444-59425-9.00022-6Мавринская Т.М., Артюшкова О.В. (2020) Лохковские отложения западного склона Южного Урала, их расчленение и глобальная корреляция на основе конодонтовой фаун. Изв. Томского политехн. ун-та. Инжиниринг георесурсов, 331(3), 213-225.Becker R.T., Königshof P., Brett C.E. (2016) Devonian climate, sea level and evolutionary events: an introduction. Geolog. Soc., Spec. Publ., 423. URL: http://sp.lyellcollection.orgСубрегиональные стратиграфические схемы девона западного склона Урала (докембрий, палеозой). (1993) Стратиграфические схемы Урала (докембрий, палеозой). (Под ред. Н.Я. Анцыгина, Б.А. Попова, Б.И. Чувашова). Екатеринбург.Becker R.T., Marshall J.E.A., Da Silva A.C., Agterberg F.P., Gradstein F.M., Ogg J.G. (2020) Geologic Periods: Phanerozoic. Ch. 22. The Devonian Period. (Еds F.M. Gradstein, J.G. Ogg, M.D. Schmitz, G.M. Ogg). The Geologic Time Scale, 2. Amsterdam: Elsevier, 733-810. https://doi.org/10.1016/B978-0-12-824360-2.00022-XТяжева А.П., Жаворонкова Р.А., Гарифуллина А.А. (1976) Кораллы и брахиоподы нижнего девона Южного Урала. М.: Наука, 223 с.Chlupáč I., Lukes P. (1999) Pragian/Zlichovian and Zlichovian/Dalejan boundary sections in the Lover Devonian of the Barrandian area, Czech Republic. Newslett. Stratigr., 37(1/2), 75-100.Bardashev I.A., Weddige K., Ziegler W. (2002) Phylomorphogenesis of some Early Devonian platform conodonts. Senckenbergiana Lethaea, 82(2), 375-451.Chlupáč I., Kukal Z. (1986) Reflection of possible global Devonian events in the Barrandian area, C.S.S.R. (Еd. Walliser O.H.). Global Bio-events. Lecture Notes in Earth Sciences, 8, 169-179.Becker R.T., Gradstein F.M., Hammer O. (2012) Devonian Period. (Eds F.M. Gradstein, J.G. Ogg, M.D. Schmitz, G.M. Ogg). Geologic Time Scale, 1(20). Amsterdam: Elsevier, 559-601. https://doi.org/10.1016/B978-0-444-59425-9.00022-6Chlupáč I., Kukal Z. (1988) Possible global events and the stratigraphy of the Paleozoic of the Barrandian (Cambrian–Middle Devonian, Czechoslovakia). Sborník geologických věd, Geologie, 43, 83-146.Becker R.T., Königshof P., Brett C.E. (2016) Devonian climate, sea level and evolutionary events: an introduction. Geol. Soc., Spec. Publ., 423. URL: http://sp.lyellcollection.orgChlupáč I., Oliver W.A. (1989) Decision on the Lochkovian-Pragian boundary stratotype (Lower Devonian). Episodes, 12, 109-113.Becker R.T., Marshall J.E.A., Da Silva A.C., Agterberg F.P., Gradstein F.M., Ogg J.G. (2020) Geologic Periods: Phanerozoic. Ch. 22. The Devonian Period. (Еds F.M. Gradstein, J.G. Ogg, M.D. Schmitz, G.M. Ogg). The Geologic Time Scale, 2. Amsterdam: Elsevier, 733-810. https://doi.org/10.1016/B978-0-12-824360-2.00022-XGuidelines and statutes of the International Commission on Stratigraphy (ICS). (1986) (J.W. Cowie, W.H. Ziegler, A. Boucot, M.G. Bassett, J. Remane). Courier Forschungs institut Senckenberg, 83, 1-14.Chlupáč I., Lukes P. (1999) Pragian/Zlichovian and Zlichovian/Dalejan boundary sections in the Lover Devonian of the Barrandian area, Czech Republic. Newslett. Stratigr., 37(1/2), 75-100.Hladil J., Slavík L., Schnabl P., Koptíková L., Frána J., Vacek F., Bábek O. (2008) The gross environmental phenomenon of the classical Pragian stage (“hot lowstand”). (Еd. A. Bjorlykke). X–CD Technologies, 33 rd International Geological Congress, International Union of Geological Sciences. Abstract CD-ROM, HPF-01 Gene ral contributions to paleontology and historical geology, pt 1, 1343454.Chlupáč I., Kukal Z. (1986) Reflection of possible global Devonian events in the Barrandian area, C.S.S.R. (Ed. O.H. Walliser). Global Bio-events. Lecture Notes in Earth Sciences, 8, 169-179.Klapper G. (1977) Lower and Middle Devonian conodont sequence in central Nevada, with contributions by D.B. Johnson. Western North America: Devonian. (Eds M.A. Murphy, W.B.N. Berry, C.A. Sandberg). University California, Riverside Campus Museum, Contribution, 4, 33-54.Chlupáč I., Kukal Z. (1988) Possible global events and the stratigraphy of the Paleozoic of the Barrandian (Cambrian-Middle Devonian, Czechoslovakia). Sborník geologických věd, Geologie, 43, 83-146.Koptíková L., Hladil J., Slavík L., Bábek O., Čejchan P. (2010) Fine-grained non-carbonate particulates embedded in neritic to pelagic limestones (Lochkovian to Emsian, Prague Synform, Czech Republic): Composition, provenance and links to magnetic susceptibility and gamma-ray logs. Geol. Belgica, 13(4), 407-430.Chlupáč I., Oliver W.A. (1989) Decision on the Lochkovian-Pragian boundary stratotype (Lower Devonian). Episodes, 12, 109-113.Lane H.R., Ormiston A.R. (1979) Siluro–Devonian biostratigraphy of the Salmontrout Rive area, east–central Alaska. Geologica et Palaeontologica, 13, 39-96.Guidelines and statutes of the International Commissionon Stratigraphy (ICS). (1986) (J.W. Cowie, W.H. Zigler, A. Boucot, M.G. Bassett, J. Remane). Courier Forschungs institut Senckenberg, 83, 1-14.Legend of the South Ural series of sheets of the State Geological Map of the Russian Federation scale 1 : 200 000 (second ed.). (1999) St.Petersburg, VSEGEI. (In Russ.)Hladil J., Slavík L., Schnabl P., Koptíková L., Frána J., Vacek F., Bábek O. (2008) The gross environmental phenomenon of the classical Pragian stage (“hot lowstand”). (Еd. A. Bjorlykke). X–CD Technologies, 33 rd International Geological Congress, International Union of Geological Sciences. Abstract CD-ROM, HPF-01 Gene ral contributions to paleontology and historical geology, part 1, 1343454.Lu J.-F., Qie W.-Q., Chen X.-Q. (2016) Pragian and lower Emsian (Lower Devonian) conodonts from Liujing, Guangxi, South China. Alcheringa, 40, 275-296. ISSN 0311-5518.Klapper G. (1977) Lower and Middle Devonian conodont sequence in central Nevada, with contributions by D.B. Johnson. Western North America: Devonian. (Еds M.A. Murphy, W.B.N. Berry, C.A. Sandberg). University California, Riverside Campus Museum, Contribution, 4, 33-54.Lu J.-F., Valenzuela-Ríos J.I., Liao J.-C., Wang Yi. (2019) Polygnathids (Conodonta) around the Pragian/Emsian boundary from the Dacun-1 section (central Guangxi, South China). J. Paleontol., 93(6), 1210-1220. https://doi.org/10.1017/jpa.2019.31Koptíková L., Hladil J., Slavík L., Bábek O., Čejchan P. (2010) Fine-grained non-carbonate particulates embedded in neritic to pelagic limestones (Lochkovian to Emsian, Prague Synform, Czech Republic): Composition, provenance and links to magnetic susceptibility and gamma-ray logs. Geol. Belgica, 13(4), 407-430.Mavrinskaya T.М., Artyushkova O.V. (2017) Conodont characteristic of the Lochkovian–Pragian boundary interval in the Mindigulovo section (western slope of the Southern Urals). Palaeobiodivers. Palaeoenviron., 97(3), 391-404. https://doi.org/10.1007/s12549-017-0292-1Lane H.R., Ormiston A.R. (1979) Siluro-Devonian biostratigraphy of the Salmontrout rive area, East-Central Alaska. Geologica Palaeontol., 13, 39-96.Mavrinskaya T.M., Artyushkova O.V. (2020) Lochkovian deposits of the western slope of the Southern Urals, their subdivision and global correlation based on conodont fauna. Izv. Tomsk. Politekhn. Un-ta. Inzhiniring Georesursov, 331(3), 213-225. (In Russ.)Lu J.-F., Qie W.-Q., Chen X.-Q. (2016) Pragian and lower Emsian (Lower Devonian) conodonts from Liujing, Guangxi, South China. Alcheringa, 40, 275-296. ISSN 0311-5518.Mavrinskaya T.M., Slavik L. (2013) Correlation of Early Devonian (Lochkovian–early Pragian) conodont faunas of the South Urals (Russia). Bull. Geosci., 88(2), 283-296.Lu J.-F., Valenzuela-Ríos J.I., Liao J.-C., Wang Yi. (2019) Polygnathids (Conodonta) around the Pragian/Emsian boundary from the Dacun-1 section (central Guangxi, South China). J. Paleontol., 93(6), 1210-1220. https://doi.org/10.1017/jpa.2019.31Mawson R. (1998) Thoughts on Late Pragian–Emsian polygnathid evolution: documentation and discussion. (Ed. H. Szaniawski). Proceedings of the Sixth European Conodont Symposium (ECOS VI). Palaeontol. Polonica, 58, 201-211.Mavrinskaya T.М., Artyushkova O.V. (2017) Conodont characteristic of the Lochkovian–Pragian boundary interval in the Mindigulovo section (western slope of the Southern Urals). Palaeobiodivers. Palaeoenviron., 97(3), 391-404. https://doi.org/10.1007/s12549-017-0292-1.Murphy M.A. (2005) Pragian conodont zonal classification in Nevada, western North America. Revista Española de Paleontología, 20, 177-206.Mavrinskaya T.M., Slavik L. (2013) Correlation of Early Devonian (Lochkovian–early Pragian) conodont faunas of the South Urals (Russia). Bull. Geosci., 88(2), 283-296.Philip G.M. (1965) Lower Devonian conodonts from the Tyers area, Gippsland, Victoria. Proceedings of the Royal Society of Victoria, 79, 95-121.Murphy M.A. (2005) Pragian conodont zonal classification in Nevada, western North America. Revista Española de Paleontología, 20, 177-206.Slavík L. (2004) The Pragian–Emsian conodont successions of the Barrandian area: Search of an alternative to the GSSP Polygnathid–based correlation concept. Geobios, 37, 454-470.Philip G.M. (1965) Lower Devonian conodonts from the Tyers area, Gippsland, Victoria. Proc. Royal Soc. Victoria, 79, 95-121.Slavík L., Hladil J. (2004) Lochkovian Pragian GSSP revisited: Evidence about conodont taxa and their stratigraphic distribution. Newslett. Stratigr., 40(3), 137-153.Slavík L. (2004) The Pragian–Emsian conodont successions of the Barrandian area: Search of an alternative to the GSSP Polygnathid–based correlation concept. Geobios, 37, 454-470.Slavík L., Valenzuela-Ríos J.I., Hladil J., Carls P. (2007) Early Pragian conodont–based correlations between the Barrandian area and the Spanish central Pyrenees. Geol. J., 42, 499-512.Mawson R. (1998) Thoughts on Late Pragian–Emsian polygnathid evolution: documentation and discussion. (Ed. H. Szaniawski). Proceedings of the Sixth European Conodont Symposium (ECOS VI). Palaeontol. Polonica, 58, 201-211.Stratigraphic charts of the Urals (pre-Cambrian, Paleozoic). (1993) (Eds N.Y. Antsygin, B.A. Popov, B.I. Chuvashov). Ekaterinburg. (In Russ.)Slavík L., Hladil J. (2004) Lochkovian Pragian GSSP revisited: Evidence about conodont taxa and their stratigraphic distribution. Newslett. Stratigr., 40(3), 137-153.Talent J.A., Mawson R., Andrew A.S., Hamilton P.J., Whitford D.J. (1993) Middle Palaeozoic extinction events: faunal and isotope data. Palaeogeogr., Palaeoclimatol., Palaeoecol., 104, 139-152.Slavík L., Valenzuela-Ríos J.I., Hladil J., Carls P. (2007) Early Pragian conodont–based correlations between the Barrandian area and the Spanish central Pyrenees. Geol. J., 42, 499-512.Tyazheva A.P., Zhavoronkova R.A., Garifullina A.A. (1976) The Lower Devonian corals and brachiopods in the South Urals. Moscow, Nauka Publ., 223 p. (In Russ.)Talent J.A., Mawson R., Andrew A.S., Hamilton P.J., Whitford D.J. (1993) Middle Palaeozoic extinction events: faunal and isotope data. Palaeogeogr., Palaeoclimatol., Palaeoecol., 104, 139-152.Yolkin E.A., Izokh N.G., Weddige K., Erina M.V., Valenzuela-Ríos J.I., Apekina L.S. (2011) Eognathodid and polygnathid lineages from the Kitab state geological reserve sections (Zeravshan-Gissar moutainous area, Uzbekistan) as the bases for improvements of Pragian–Emsian standard conodont zonation. News of paleontology and stratigraphy, Supplement to the journal “Geology and Geophysics”, 52(15), 37-45. (In Russ.)Walliser O.H. (1996) Global Events in the Devonian and Carboniferous. (Ed. Walliser O.H.). Global Events and Event Stratigraphy in the Phanerozoic, 225-250.Walliser O.H. (1996) Global Events in the Devonian and Carboniferous. (Ed. O.H. Walliser). Global Events and Event Stratigraphy in the Phanerozoic, 225-250.Weddige K. (1987) The lower Pragian boundary (Lower Devonian) based on the conodont species Eognathodus sulcatus. Senckenbergiana Lethaea, 67(5/6), 479-487.Weddige K. (1987) The lower Pragian boundary (Lower Devonian) based on the conodont species Eognathodus sulcatus. Senckenbergiana Lethaea, 67(5/6), 479-487.Ziegler W., Lane H.R. (1987) Cycles in conodont evolution from Devonian to Mid–Carboniferous. (Ed. R.J. Aldridge). Palaeobiology of Conodonts, 147-164.Ziegler W., Lane H.R. (1987) Cycles in conodont evolution from Devonian to mid–Carboniferous. (Ed. R.J. Aldridge). Palaeobiology of conodonts, 147-164.Ziegler W., Weddige K. (1999) Zur Biologie, Taxonomie und Chronologie der Conodonten. Paläontologische Zeitschrift, 73, 1-38.Ziegler W., Weddige K. (1999) Zur Biologie, Taxonomie und Chronologie der Conodonten. Paläontologische Zeitschrift, 73, 1-38.

The authors declare that there are no conflicts of interest present.