Sokolova L.V.
sokolova@geo.komisc.ru
Graduated from Syktyvkar State University (2005), specialization "biology".PhD in Geological and Mineralogical Sciences.
Researcher, Institute of Geology, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences
Area of scientific interests: stratigraphy, Silurian conodonts.
Author of 14 publications.
Stratigraphy and lithology
| Article # 33_2023 | submitted on 07/20/2023 displayed on website on 09/06/2023 |
| 22 p. | Sokolova L.V., Nechaev M.S., Kotik I.S. |
| New data about the age of the Dershor Formation (Lower Devonian) on the Chernyshev swell (Timan-Pechora petroleum province) | |
| Lithological and biostratigraphical studies of the stratotyp section of the Lower Devonian Dershor Formation, represented in outcrops in the north of the Chernyshev swell, have been carried out. In the section of the Dershor Formation, a sequence of five conodont associations of different taxonomic structure and age has been established: ass. I c Pelekysgnathus of Early Devonian age, ass. II c Lanea of Middle Lochkovian age, ass. III c Pandorinellina cf. optima of Middle Lochkovian age, ass. IV c Pandorinellina exigua cf. philipi of Late Lochkovian age and ass. V with Pandorinellina cf. paridens of the Late Lochkovian – Pragian age. The species Amydrotaxis cf. chattertoni, Oulodus astriatus, Ozarkodina cf. mashkovae, Zieglerodina cf. paucidentata and Pandorinellina cf. paridens were identified for the first time in the conodont fauna of the Dershor Formation. As a result of the conodonts study from this typical section of Dershor Formation, isolated in the volume of the Ovinparm regional stage, the problem of the presumably younger (Sotchemkyrt) age of the strata of the greater upper part of the Dershor Formation is identified. Keywords: conodont, stratotyp section, Lower Devonian, Dershor Formation, Lochkovian Stage, Ovinparm regional stage, Sotchemkyrt regional stage, Chernyshev swell, Timan-Pechora petroleum province. |
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| article citation | Sokolova L.V., Nechaev M.S., Kotik I.S. Novye dannye o vozraste dershorskoy svity (nizhniy devon) gryady Chernysheva (Timano-Pechorskaya neftegazonosnaya provintsiya) [New data about the age of the Dershor Formation (Lower Devonian) on the Chernyshev swell (Timan-Pechora petroleum province)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2023, vol. 18, no. 3, available at: http://www.ngtp.ru/rub/2023/33_2023.html EDN: XZZCRW |
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Baranov V.V., Al'khovik T.S. Konodonty rodov Amydrotaxis Klapper et Murrhu i Gigapthodus Varanov v nizhnem devone Severo-vostoka Rossii [Conodonts of the genera Amydrotaxis Klapper et Мurрhу and Giganthodus Baranov in the Lower Devonian of Northeastern Russia]. Otechestvennaya geologiya, 2005, pp. 97-101.
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Mathieson D., Mawson R., Simpson A.J., Talent J.A. Late Silurian (Ludlow) and Early Devonian (Pragian) conodonts from the Cobar Supergroup, western New South Wales, Australia, Bulletin of Geosciences, 2016, vol. 91, no. 3, pp. 583-652. DOI: 10.3140/bull.geosci.1593
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Mavrinskaya T.M., Artyushkova O.V. Lokhkovskie otlozheniya zapadnogo sklona Yuzhnogo Urala, ikh raschlenenie i global'naya korrelyatsiya na osnove konodontovoy fauny [Loсhkovian strata of the western slope of the South Urals, their division and global correlation based on conodonts]. Izvestiya Tomskogo politekhnicheskogo universiteta. Inzhiniring georesursov, 2020, vol. 331, no. 3, pp. 213-225. DOI: 10.18799/24131830/2020/3/2564
Mavrinskaya T.M., Sharipova A.R. Konodontovoe biopaznoobrazie v lokhkovskom yaruse nizhnego devona zapadnogo sklona Yuzhnogo Urala [Conodont biodiversity in the Lochkovian Stage of the Lower Devonian of the western slope of the Southern Urals]. Sovremennaya mikropaleontologiya - problemy i perspektivy: trudy XVII Vserossiyskogo mikropaleontologicheskogo soveshchaniya (Kazan', 24-29 Sept 2018). Moscow: PIN RAN, 2018, pp. 323-328.
Metodicheskoe rukovodstvo po litologo-petrograficheskomu i petrokhimicheskomu izucheniyu osadochnykh porod-kollektorov [Methodical manual on lithological-petrographic and petrochemical study of sedimentary reservoir rocks]. L.P. Gmid, L.G. Belonovskaya, T.D. Shibina, N.S. Oknova, A.V. Ivanovskaya; ed. A.M. Zharkova. St. Petersburg: VNIGRI, 2009, 160 p.
Murphy M.A., Valenzuela-Rios J.I. Lanea new genus, lineage of Early Devonian conodonts. Bollettino della Società Paleontologica Italiana, 1998, vol. 37, no. 2-3, pp. 321-334.
Murphy M.A., Valenzuela-Ríos J.I., Carls P. On classification of Pridoli (Silurian)-Lochkovian (Devonian) Spathognathodontidae (Conodonts). University of California, Riverside Campus Museum Contribution, 2004, no. 6, pp. 1-25.
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Savage N.M. Lower Devonian conodonts from the Karheen Formation, southeastern Alaska. Canadian Journal of Earth Sciences, 1977, no. 14, pp. 278-284.
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Timano-Pechorskaya provintsiya: geologicheskoe stroenie, neftegazonosnost' i perspektivy osvoeniya [Timan-Pechora province: geological structure, petroleum potential and development prospects]. M.D. Belonin, O.M. Prishchepa, E.L. Teplov, G.F. Budanov, S.A. Danilevskiy. St. Petersburg: Nedra, 2004, 396 p.
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Baranov V.V. Nizhnyaya granitsa devonskoy sistemy i nekotorye rannelokhkovskie konodonty Severo-vostoka Evrazii [The lower boundary of the Devonian system and some Early Lochkovian conodonts of Northeast Eurasia]. Otechestvennaya geologiya, 2018, no. 5, pp. 81-86. DOI: 10.24411/0869-7175-2018-10019
Baranov V.V., Al'khovik T.S. Konodonty rodov Amydrotaxis Klapper et Murrhu i Gigapthodus Varanov v nizhnem devone Severo-vostoka Rossii [Conodonts of the genera Amydrotaxis Klapper et Мurрhу and Giganthodus Baranov in the Lower Devonian of Northeastern Russia]. Otechestvennaya geologiya, 2005, pp. 97-101.
Carls P., Slavík L., Valenzuela-Ríos J.I. Revisions of conodont biostratigraphy across the Silurian-Devonian boundary. Bulletin of Geosciences, 2007, vol. 82, no. 2, pp. 145-164. DOI: 10.3140/bull.geosci.2007.02.145
Corriga M.G., Corradini C., Pondrelli M., Simonetto L. Lochkovian (Lower Devonian) conodonts from Rio Malinfier section (Carnic Alps, Italy). GORTANIA. Geologia, Paleontologia, Paletnologia, 2011, no. 33, p. 31-38.
Devon zapadnogo sklona severa Urala i Pay-Khoya: stratigrafiya, printsipy raschleneniya, korrelyatsiya [Devonian Western slope of the Northern Urals and Pay-Khoy (stratigraphy, subdivision principles, correlation)]. V.S. Tsyganko; Rossiyskaya akad. nauk, Ural'skoe otd., Komi nauch. tsentr, In-t geologii. Ekaterinburg: IG Komi NTs UrO RAN, 2011,354 p.
Devonskie konodonty Tsentral'nogo devonskogo polya (Russkaya platforma) [Devonian conodonts of the Central Devonian field (Russian Platform)]. V.A. Aristov. Moscow: Nauka, 1988, 120 s.
Drygant D., Szaniawski H. Lochkovian conodonts from Podolia, Ukraine and their stratigraphic significance. Acta Palaeontologica Polonica, 2012, vol. 57, no 4, pp. 833-861. DOI: 10.4202/app.2011.0124
Farell J.R. Late Pridoli, Lochkovian, and early Pragian conodonts from the Gap area between Larras Lee and Eurimbla, central western NSW. Australia. Cour. Forsch.-Inst. Senckenberg, 2003, no. 245, pp. 107-181.
Gryada Chernyshova: geologicheskoe stroenie i neftegazonosnost' [Chernyshev Ridge: geological structure and petroleum potential]. V.N. Danilov; Filial OOO «Gazproi VNIIGAZ», Ukhta. Saint-Petersburg: Renome, 2017, 287 p.
Ivanov K.S. Metody poiskov i vydeleniya konodontov. Metodicheskie rekomendatsii [Methods of search and selection of conodonts. Methodological recommendations]. Sverdlovsk, 1987, 117 p.
Kirilishina E.M. Konodonty verkhnefranskikh i nizhnefamenskikh otlozheniy Voronezhskoy anteklizy [Conodonts of the Upper Fransian and Lower Famenian deposits of the Voronezh anteclise]. Avtoreferat dis. … kand. geologo-mineral. nauk. Moscow, 2006, 24 p.
Kirilishina E.M., Kononova L.I. Konodontovye biofatsii vo franskom basseyne yugo-zapada Moskovskoy sineklizy [Conodont biofacies in the Fransian basin of the southwest of the Moscow syneclise]. Vestnik Moskovskogo Universiteta. Seriya 4. Geologiya, 2004, no. 2, pp. 32-40.
Klapper G., Murphy M.A. Silurian Lower Devonian conodont sequence in the Roberts mountains Formation of Central Nevada. University of California publication in Geological sciences, 1974, vol. 111, 62 p.
Kuranov A.V. Nevostrebovannye neftegazovye ob"ekty Timano-Pechorskoy provintsii, ikh uglevodorodnyy potentsial i perspektivy vovlecheniya v osvoenie [Unclaimed oil and gas objects in the Timan-Pechora petroleum province: potential and possibilities of involving them in the development]. Neftegazovaya Geologiya. Teoriya I Praktika, 2015, vol. 10, no. 1, available at: http://www.ngtp.ru/rub/4/8_2015.pdf DOI: 10.17353/2070-5379/8_2015
Lu J., Guo W., Wang Y., Xu H. The first discovery of Lochkovian (Lower Devonian) conodonts in central Guangxi, South China and its geological implications. Journal of Paleontology, 2023, vol. 97, no. 2, pp. 1-13. DOI: 10.1017/jpa.2023.2
Mathieson D., Mawson R., Simpson A.J., Talent J.A. Late Silurian (Ludlow) and Early Devonian (Pragian) conodonts from the Cobar Supergroup, western New South Wales, Australia, Bulletin of Geosciences, 2016, vol. 91, no. 3, pp. 583-652. DOI: 10.3140/bull.geosci.1593
Mavrinskaya T.M., Artyushkova O.V. Conodont characteristic of the Lochkovian-Pragian boundary interval in the Mindigulovo section (western slope of the Southern Urals). Palaeobiodiversity and Palaeoenvironments, 2017, vol. 97, no. 3, pp. 391-404. DOI: 10.1007/s12549-017-0292-1 2017
Mavrinskaya T.M., Artyushkova O.V. Lokhkovskie otlozheniya zapadnogo sklona Yuzhnogo Urala, ikh raschlenenie i global'naya korrelyatsiya na osnove konodontovoy fauny [Loсhkovian strata of the western slope of the South Urals, their division and global correlation based on conodonts]. Izvestiya Tomskogo politekhnicheskogo universiteta. Inzhiniring georesursov, 2020, vol. 331, no. 3, pp. 213-225. DOI: 10.18799/24131830/2020/3/2564
Mavrinskaya T.M., Sharipova A.R. Konodontovoe biopaznoobrazie v lokhkovskom yaruse nizhnego devona zapadnogo sklona Yuzhnogo Urala [Conodont biodiversity in the Lochkovian Stage of the Lower Devonian of the western slope of the Southern Urals]. Sovremennaya mikropaleontologiya - problemy i perspektivy: trudy XVII Vserossiyskogo mikropaleontologicheskogo soveshchaniya (Kazan', 24-29 Sept 2018). Moscow: PIN RAN, 2018, pp. 323-328.
Metodicheskoe rukovodstvo po litologo-petrograficheskomu i petrokhimicheskomu izucheniyu osadochnykh porod-kollektorov [Methodical manual on lithological-petrographic and petrochemical study of sedimentary reservoir rocks]. L.P. Gmid, L.G. Belonovskaya, T.D. Shibina, N.S. Oknova, A.V. Ivanovskaya; ed. A.M. Zharkova. St. Petersburg: VNIGRI, 2009, 160 p.
Murphy M.A., Valenzuela-Rios J.I. Lanea new genus, lineage of Early Devonian conodonts. Bollettino della Società Paleontologica Italiana, 1998, vol. 37, no. 2-3, pp. 321-334.
Murphy M.A., Valenzuela-Ríos J.I., Carls P. On classification of Pridoli (Silurian)-Lochkovian (Devonian) Spathognathodontidae (Conodonts). University of California, Riverside Campus Museum Contribution, 2004, no. 6, pp. 1-25.
Nazarova V.M., Kirilishina E.M., Kononova L.I., Karpova E.V., Dem'yankov S.S. Model' konodontovykh biofatsiy melkovodnykh paleoobstanovok franskogo yarusa (pozdniy devon) [The conodont biofacies model of shallow paleoenvironments in Frasnian (Late Devonian)]. Vestnik Moskovskogo Universiteta. Seriya 4. Geologiya, 2022, no. 6, pp. 35-45. DOI: 10.33623/0579-9406-2022-6-35-45
Nizhniy paleozoy Pechorskogo neftegazonosnogo basseyna (stroenie, usloviya obrazovaniya, neftegazonosnost') [The Lower Paleozoic of the Pechora petroleum basin (structure, conditions of formation, petroleum content)]. V.A. Zhemchugova, S.V. Mel'nikov, V.N. Danilov. Moscow: Izd-vo Akad. gor. nauk, 2001, 109 p.
Opornye razrezy verkhnego silura i nizhnego devona Pripolyarnogo Urala [Reference sections of the Upper Silurian and Lower Devonian of the Subpolar Urals]. Editors V.S. Tsyganko, V.A. Chermnykh. Syktyvkar: Komi filial AN SSSR, 1983, 74 p.
Pazukhin V.N., Gatovskiy Yu.A. Novyy vid konodontov roda Pelekysgnathus iz famenskikh otlozheniy vostoka Russkoy platformy [A new species of Pelekysgnathus (conodonts) from the Famennian of the east Russian platform]. Paleontologicheskiy zhurnal, 2011, no. 5, pp. 85-88.
Savage N.M. Lower Devonian conodonts from the Karheen Formation, southeastern Alaska. Canadian Journal of Earth Sciences, 1977, no. 14, pp. 278-284.
Savage N.M., Blodgett R.B. A new species of the condone Amydrotaxis from the Early Devonian of southwestern Alaska. Short notes on Alaska geology, 1995, professional report 117, pp. 69-73.
Soobshchestva brakhiopod i biostratigrafiya verkhnego ordovika, silura i nizhnego devona severo-vostochnoy okrainy paleokontinenta Baltiya [Brachiopod communities and biostratigraphy of Upper Ordovician, Silurian and Lower Devonian strata of the northeastern margin of the Baltia Paleocontinent]. T.M. Beznosova. Ekaterinburg: UrO RAN, 2008, 219 p.
Stratigraficheskie skhemy Urala (dokembriy, paleozoy) [Stratigraphic schemes of the Urals (Precambrian, Paleozoic)]. Ed. N.Ya. Antsygin, B.A. Popov, B.I. Chuvashov, Ekaterinburg, 1993.
Suttner T.J. Condon Stratigraphy, Facies-Related Distribution Patterns and Stable Isotopes (Carbon and Oxygen) of the Uppermost Silurian to Lower Devonian Seewarte Section (Carnic Alps, Carinthia, Austria). Abhandlungen Der Geologischen Bundesanstalt, 2007, band 59, pp. 1-111.
Timano-Pechorskaya provintsiya: geologicheskoe stroenie, neftegazonosnost' i perspektivy osvoeniya [Timan-Pechora province: geological structure, petroleum potential and development prospects]. M.D. Belonin, O.M. Prishchepa, E.L. Teplov, G.F. Budanov, S.A. Danilevskiy. St. Petersburg: Nedra, 2004, 396 p.
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Geochemical research
Section editor – PhD in geology and mineralogy Bazhenova T.K.
| Article # 41_2017 | submitted on 09/07/2017 displayed on website on 12/11/2018 |
| 15 p. | Kotik I.S., Kotik O.S., Valyaeva O.V., Sokolova L.V. |
| Silurian and Lower Devonian petroleum source rocks of the Chernov Ridge (Timan-Pechora Basin, Russia) | |
| The article presents the results of geochemical research of Silurian and Lower Devonian sequences on the Chernov ridge. The main part of the section is represented by petroleum source rocks with (TOC concentrations of 0,1–0,5%). Petroleum source rocks with increased contents of organic matter (> 0,5%) belong to clay-carbonate intervals in Silurian part of the section and layers of bituminous dolomites in the Lower Devonian. The hydrocarbon composition of the saturated fraction of bitumen in the Silurian-Lower Devonian deposits show a sapropel organic matter, probably of a different genetic types – plankton and marin algae. The isotopic composition of organic carbon (?13С, ‰) of bitumen part (30,1–32,6‰) and kerogen component (30,9–31,1‰) confirms the sapropel genesis of organic matter. The level of catagenetic transformation, estimated by the conodont colour alteration index, indicates that the Silurian-Lower Devonian deposits are in the main zone of oil generation (subdivision of the catagenesis MK1-2). The process of hydrocarbon generation is confirmed by the presence of bitumen throughout the section of the Silurian and Lower Devonian sequences.
Keywords: Silurian and Lower Devonian sequences, source rock, organic matter, bitumen, isotopic composition of organic carbon, Chernov ridge, Timan-Pechora Basin. |
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| article citation | Kotik I.S., Kotik O.S., Valyaeva O.V., Sokolova L.V. Neftegazomaterinskie porody siluriyskikh i nizhnedevonskikh otlozheniy zapadnoy chasti podnyatiya Chernova [Silurian and Lower Devonian petroleum source rocks of the Chernov Ridge (Timan-Pechora Basin, Russia)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2017, vol. 12, no. 4, available at: http://www.ngtp.ru/rub/1/41_2017.pdf |
| DOI | https://doi.org/10.17353/2070-5379/41_2017 |
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