Iosifidi A.G.

iosifidi@km.ru



Graduated from Physics Department of Leningrad State University (1976), specialization «geophysics».
PhD in Physical and Mathematical Sciences.
Leading researcher of the Laboratory of magnetostratigraphy and paleomagnetic reconstructions, VNIGRI.
Area of scientific interests: magnetism, paleomagnetic studies of Paleozoic and Precambrian deposits of the Russian platform.
Author of 169 publications.
Regional petroleum geology
Article # 7_2024 submitted on 02/26/2024 displayed on website on 03/29/2024
21 p.
pdf Devonian strata of the Southern Timan: paleomagnetic data
New paleomagnetic determinations are presented based on a reconnaissance collection of rocks of the Frasnian and Famennian stages of the Upper Devonian, selected on the river Ukhta and river Izhma. Three components of natural remanent magnetization have been identified. Component A, post-folding, is close to the modern direction of the geomagnetic field. Bipolar prefolded component C, treatment test positive. The paleomagnetic pole of component C has a large deviation in longitude to the east, relative to the trajectories of the apparent movement of the paleomagnetic poles for the East European and Russian platforms. The third, pre-folded, bipolar component D3 of Frasnian and Early Famennian age with a positive test of geomagnetic field polarity reversal. The resulting position of the paleomagnetic pole according to the D3 component indicates a clockwise rotation of the studied rocks with respect to the Russian Platform by 1020 degrees. The sections were correlated with the available magnetostratigraphic scales for the Frasnian and Famennian strata of the Upper Devonian.

Keywords: paleomagnetic determination, Upper Devonian, polarity of the geomagnetic field, magnetostratigraphic scale, paleomagnetic pole, Russian platform, South Timan.
article citation Iosifidi A.G., Sal'naya N.V. Devonskie otlozheniya Yuzhnogo Timana: paleomagnitnye dannye [Devonian strata of the Southern Timan: paleomagnetic data]. Neftegazovaya Geologiya. Teoriya I Praktika, 2024, vol. 19, no. 1, available at: https://www.ngtp.ru/rub/2024/7_2024.html. EDN: JMTECL
References
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   Iosifidi A.G., Khramov A.N, Komissarova R.A., Pletneva A.S. Barentsevo-Pechorskaya plita v devone: paleogeograficheskoe polozhenie i tektonika ee obramleniya: paleomagnitnye dannye [Barents-Pechora plate in the Devonian: paleogeographical position and tectonics of its framing: paleomagnetic data]. Paleomagnetism of sedimentary basins of Northern Eurasia: collection of articles; ed. A.N. Khramov. St. Petersburg: VNIGRI, 2007, pp. 126-143.
   Iosifidi A.G., Khramov A.N. Iosifidi A.G., Khramov A.N. Paleomagnetizm verkhnekamennougol'nykh i rannepermskikh otlozheniy Vostochno-Evropeyskoy plity: klyuchevoy paleomagnitnyy polyus i kinematika kollizii s Uralom [Paleomagnetism of Upper Carboniferous and Early Permian strata of the East European Plate: key paleomagnetic pole and kinematics of collision with the Urals]. Fizika Zemli, 2002, no. 5, pp. 42-56.
   Iosifidi A.G., Khramov A.N. Paleomagnetism of Devonian and Carboniferous sedimentary rocks of Spitzbergen: to the paleosoic histori of the Barents-Kara basin fraiming. Izvestiya Physics of the Solid Earth, 2013, no. 5, pp. 725-742.
   Iosifidi A.G., Khramov A.N. Paleomagnetizm paleozoyskikh otlozheniy razrezov r. Kozhim: k probleme palinspasticheskikh rekonstruktsiy Pripolyarnogo Urala i Pay-Khoya [Paleomagnetism of Paleozoic sediments of the river sections. Kozhim: to the problem of palinspastic reconstructions of the Subpolar Urals and Pai-Khoi]. Fizika Zemli, 2013, no. 1, pp. 67-80.
   Iosifidi A.G., Khramov A.N. Sredne- i pozdnepaleozoyskie etapy gorizontal'nykh dvizheniy v Barentsevo-Pechorskom regione i evolyutsiya ikh vzaimootnosheniy s Russkoy platformoy i Uralom po paleomagnitnym dannym [Middle and Late Paleozoic time of horizontal movements in the Barents-Pechora region and the evolution of their relationship with the Russian Platform and the Urals according to paleomagnetic data]. 300 let gorno-geologicheskoy sluzhbe Rossii6 materialy Mezhdunarodnoy geofizicheskoy konferentsii. Sankt-Peterburg, 2000. St. Petersburg, 2000, pp. 22-23.
   Iosifidi A.G., Khramov A.N., Trapeznikova G.V., Pukhonto S.K. Paleomagnetizm rannepermskikh otlozheniy Pechorskoy plity: otsenka gorizontal'nykh povorotov struktur [Paleomagnetism of Early Permian strata of the Pechora plate: assessment of horizontal rotations of structures]. Fizika Zemli, 2005, no. 2, pp. 52-65.
   Iosifidi A.G., Mac Niocaill C., Khramov A. N., Dekkers M., Popov V. Palaeogeographic implications of differential inclination shallowing in permo-carboniferous sediments from the Donets basin, Ukraine. Tectonophysics, 2010, vol. 490, issue 3-4, pp. 229-240. DOI: 10.1016/j.tecto.2010.05.017
   Iosifidi A.G., Popov V.V. Paleomagnitnye issledovaniya sredne-verkhnedevonskikh otlozheniy Voronezhskoy anteklizy (Pavlovskiy kar'er) [Paleomagnetic studies of the Middle-Upper Devonian section of the Voronezh anteclise (Pavlov quarry)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2021, vol. 16, no. 4, available at: http://www.ngtp.ru/rub/2021/39_2021.html DOI: 10.17353/2070-5379/39_2021
   Iosifidi A.G., Popov V.V., Zhuravlev A.V. Verkhnedevonskie otlozheniya (franskiy yarus) severo-zapada Russkoy platformy: paleomagnitnye dannye [Upper Devonian (Frasnian stage) of the north-western part of the Russian Platform: paleomagnetic data]. Neftegazovaya Geologiya. Teoriya I Praktika, 2020, vol. 15, no. 4, available at: http://www.ngtp.ru/rub/2020/42_2020.html DOI: 10.17353/2070-5379/42_2020
   Khramov A.N., Oknova N.S. Puti issledovaniya paleomagnitnykh zapisey s tsel'yu resheniya problem neftyanoy geologii (na primere Timano-Pechorskoy provintsii) [Ways to study paleomagnetic records in order to solve problems of petroleum geology (using the example of the Timan-Pechora province)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2007, vol. 2, available at: http://www.ngtp.ru/rub/2/036.pdf
   Khramov A.N., Shkatova V.K. Obshchaya magnitostratigraficheskaya shkala polyarnosti fanerozoya [General magnetostratigraphic scale of polarity of the Phanerozoic]. Dopolneniya k Stratigraficheskomu kodeksu Rossii, St. Petersburg: Izd-vo VSEGEI, 2000, pp. 24-45.
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   Rusetskaya G.A., Tarasenko A.B., Verbitskiy V.R., Khramov A.N., Zhuravlev A.V., Evdokimova I.O., Iosifidi A.G., Tomsha V.A., Sokiran E.V. Stratopip buregskikh sloev (franskiy yarus); glavnoe devonskoe pole [Stratopype of the Bureg layers (Frasnian stage); main Devonian field]. Litosfera, 2013, no. 5, pp. 42-56.
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   Shcherbakova V.V., Zhidkov G.V., Shcherbakov V.P., Golovanova I.V., Danukalov K.N., Sal'manova R.Yu. Ul'tranizkaya napryazhennost' geomagnitnogo polya v devone po porodam Yuzhnogo Urala [Ultra-low geomagnetic field intensity in the Devonian obtained from the Southern Ural rock studies]. Fizika Zemli, 2021, no. 6, pp. 93-106. DOI: 10.31857/S0002333721060077
   Stratigraficheskiy kodeks Rossii. Izdanie tret'e, ispravlennoe i dopolnennoe [Stratigraphic Code of Russia. Third edition, corrected and expanded]. St. Petersburg, Izd-vo VSEGEI, 2019, 96 p. (MSK Rossii, VSEGEI).
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Zonenshayn L.P., Kuz'min M.I., Natapov L.M. Tektonika litosfernykh plit territorii SSSR [Tectonics of lithospheric plates on the territory of the USSR]. Moscow: Nedra, 1990, book 1, 320 p.
Stratigraphy and lithology
Article # 44_2022 submitted on 11/03/2022 displayed on website on 11/18/2022
13 p.
pdf Carboniferous rocks of Western Spitsbergen Island: paleomagnetic data
The paper presents the results of studying the samples of rocks of the Carboniferous age collected in 1985 on Western Spitsbergen Island on the eastern coast of the Recherchfjorden. A paleomagnetic pole was obtained from Carboniferous rocks (Gypsdalen Group, Middle Carboniferous-Lower Permian). The paleomagnetic determinations for the island of Western Spitsbergen are compared with data on coeval rocks of the Russian Platform. An assessment of the mutual position of the island of Western Spitsbergen and the Russian Platform in the Early Devonian, Middle Carboniferous and Early Permian is given.

Keywords: paleomagnetism, Carboniferous rocks, paleomagnetic pole, Western Spitsbergen Island, Russian Platform.
article citation Iosifidi A.G. Kamennougol'nye otlozheniya ostrova Zapadnyy Shpitsbergen: paleomagnitnye dannye [Carboniferous rocks of Western Spitsbergen Island: paleomagnetic data]. Neftegazovaya Geologiya. Teoriya I Praktika, 2022, vol. 17, no. 4, available at: http://www.ngtp.ru/rub/2022/44_2022.html
DOI https://doi.org/10.17353/2070-5379/44_2022
References
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   Iosifidi A.G., Khramov A.N. Paleomagnetism of Devonian and Carboniferous sedimentary rocks of Spitsbergen: to the paleosoic histori of the Barents-Kara basin fraiming. Izvestiya Physics of the Solid Earth, 2013, no. 49, pp.725-742. DOI: https://doi.org/10.1134/S1069351313040034
   Iosifidi A.G., Mikhaylova V.A. Paleomagnetizm kamennougol'nykh otlozheniy russkoy platformy: pereizuchenie starykh kollektsiy [Paleomagnetism of Carboniferous formations of the Russian Platform: reinvestigation of old collections]. Fizika Zemli, 2017, no. 2, pp. 1-16.
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Stratigraphy and lithology
Article # 39_2021 submitted on 11/18/2021 displayed on website on 12/03/2021
13 p.
pdf Paleomagnetic studies of the Middle-Upper Devonian section of the Voronezh anteclise (Pavlov quarry)
New paleomagnetic determinations are presented for a collection of rocks of the Middle-Upper Devonian (Givetian and Frasnian stages), sampled from an outcrop on the southwestern slope of the Pavlov granite quarry. Three characteristic components of natural remanent magnetization have been identified. The bipolar component C corresponds to the Late Paleozoic remagnetization in the Carboniferous and two components of Givetian - Frasnian age. The bipolar component of D2NR passes the geomagnetic field polarity reversal test. The obtained position of the paleomagnetic pole in terms of the bipolar component of the natural remanent magnetization is consistent with the available data on the Middle Devonian strata of the Main Devonian Field (Russian platform).

Keywords: paleomagnetic determinations, Middle-Upper Devonian, geomagnetic field, paleomagnetic pole, Main Devonian Field, Russian platform.
article citation Iosifidi A.G., Popov V.V. Paleomagnitnye issledovaniya sredne-verkhnedevonskikh otlozheniy Voronezhskoy anteklizy (Pavlovskiy kar'er) [Paleomagnetic studies of the Middle-Upper Devonian section of the Voronezh anteclise (Pavlov quarry)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2021, vol. 16, no. 4, available at: http://www.ngtp.ru/rub/2021/39_2021.html
DOI https://doi.org/10.17353/2070-5379/39_2021
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   Iosifidi A.G., Popov V.V., Zhuravlev A.V. Verkhnedevonskie otlozheniya (franskiy yarus) severo-zapada Russkoy platformy: paleomagnitnye dannye [Upper Devonian (Frasnian stage) of the north-western part of the Russian Platform: paleomagnetic data]. Neftegazovaya Geologiya. Teoriya I Praktika, 2020, vol. 15, no. 4, available at: http://www.ngtp.ru/rub/2020/42_2020.html. DOI: https://doi.org/10.17353/2070-5379/42_2020
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   Zhuravlev A.V., Sokiran E.V., Evdokimova I.O., Dorofeeva L.A., Rusetskaya G.A., Malkowski K. Faunal and facies changes at the Early-Middle Frasnian boundary in the Northwestern East European Platform. Acta Palaeontologica Polonica, 2006, vol. 51 (4), pp. 747-758.
Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 42_2020 submitted on 11/10/2020 displayed on website on 12/08/2020
16 p.
pdf Upper Devonian (Frasnian stage) of the north-western part of the Russian Platform: paleomagnetic data
Paleomagnetic determinations for the Devonian strata of the Main Devonian Field, available in the international paleomagnetic data base, do not make it possible to construct both detailed magnetostratigraphic scales and reliable trajectories of the apparent polar wander path of the paleomagnetic pole. This is primarily due to the insufficient amount of data that determine modern reliability criteria. Obtaining more complete series of reliable paleomagnetic determinations is one of the important tasks of paleomagnetic studies. The paper presents new paleomagnetic determinations from a collection of rocks of the Frasnian stage of the Upper Devonian (Ilmen and Bureg Beds of the Semiluky Formation), sampled on the southern shore of Lake Ilmen, east of the village. Korostyn in 2009. Magnetomineralogical studies were carried out to determine the magnetic minerals of carriers of natural remanent magnetization. Three characteristic components of natural remanent magnetization have been identified. Two components correspond to the Late Paleozoic magnetization reversal (in the Carboniferous and Permian times). The third, bipolar component of the Frasnian age passes the reverse polarity test of the geomagnetic field.. The obtained position of the paleomagnetic pole by the bipolar component of the natural remanent magnetization is consistent with the available data on the section of the Late Upper Devonian of the Main Devonian Field.

Keywords: paleomagnetism, Frasnian stage of the Upper Devonian, Ilmen and Bureg Beds of the Semiluky Formation, geomagnetic field polarity, magnetostratigraphy, paleomagnetic pole.
article citation Iosifidi A.G., Popov V.V., Zhuravlev A.V. Verkhnedevonskie otlozheniya (franskiy yarus) severo-zapada Russkoy platformy: paleomagnitnye dannye [Upper Devonian (Frasnian stage) of the north-western part of the Russian Platform: paleomagnetic data]. Neftegazovaya Geologiya. Teoriya I Praktika, 2020, vol. 15, no. 4, available at: http://www.ngtp.ru/rub/2020/42_2020.html
DOI https://doi.org/10.17353/2070-5379/42_2020
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   Shishlov S.B., Zhuravlev A.V., Rodina T.S. Stroenie i genezis rakushnyakovykh izvestnyakov buregskikh sloev v stratotipicheskoy mestnosti (franskiy yarus, yuzhnoe poberezh'e ozera Il'men') [Structure and genesis of shell limestones of the Bureg Beds in the stratotype area (Frasnian stage, southern coast of Lake Ilmen)]. Regional'naya geologiya i metallogeniya, 2014, no. 58, pp. 45-53.
Tarasenko A.B., Shishlov S.B. Litologo-geneticheskie osobennosti il'menskikh i buregskikh sloev franskogo yarusa v rayone yuzhnogo berega ozera Il'men' [Lithological and genetic features of the Ilmen and Bureg Beds of the Frasnian stage in the area of the southern coast of Lake Ilmen]. Regional'naya geologiya i metallogeniya, 2012, no. 49, pp. 47-55.
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Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 37_2015 submitted on 09/03/2015 displayed on website on 10/01/2015
21 p.
pdf Magnetostratigraphy of Early Devonian deposits of Spitsbergen
A new paleomagnetic results on the collections of the Early Devonian rocks from the northern part of the Spitsbergen land are presented. Detailed demagnetization of the еarly Devonian rocks reveals the presence of two components of the natural remanent magnetization. The zones of normal and reverse polarity are identified in our study for the Andreebreen, Fraenkelryggen and Ben Nevis Formations, Red Bay series and Kapp Kjeldsen and Keltiefjellet formations, Wood Bay series. The polarity and reversal tests for components of normal and reverse polarity is positive. Directions of paleomagnetic poles for early Devonian time are consistent with the available data on Spitsbergen. The reasonable correspondence between the locations of the zones of normal and reverse polarity revealed in our study and the general magnetostratigraphic scale support the old age of the isolated characteristic components of normal and reverse polarity.

Keywords: the polarity of the geomagnetic field, magnetostratigraphy, paleomagnetic poles, Spitsbergen.
article citation Iosifidi A.G. Magnitostratigrafiya rannedevonskikh otlozheniy ostrova Shpitsbergen [Magnetostratigraphy of Early Devonian deposits of Spitsbergen]. Neftegazovaya Geologiya. Teoriya I Praktika, 2015, vol. 10, no. 4, available at: http://www.ngtp.ru/rub/2/37_2015.pdf
DOI https://doi.org/10.17353/2070-5379/37_2015
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Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 43_2014 submitted on 10/08/2014 displayed on website on 10/18/2014
21 p.
pdf  Paleomagnetic research of the Paleozoic sections of Polar Urals (Paga River)
Paleomagnetic studying of Cambrian-Ordovician-Devonian collection of Paleozoic deposits of the Paga River valley has been carried out. The results of paleomagnetic research show a two-component structure of natural residual magnetization (NRM). The identified typical components are postfolded. The estimates of horizontal turns of structures are executed. The possible model of magnetic reversal of the studied deposits has been realized.

Keywords: paleomagnetic vectors, anisotropy of magnetic susceptibility, overthrust, Polar Urals.
article citation Sal'naya N.V., Popov V.V., Rodionov V.P., Yakubson A.M., Iosifidi A.G. Paleomagnitnye issledovaniya paleozoyskikh otlozheniy Pripolyarnogo Urala, reka Paga [Paleomagnetic research of the Paleozoic sections of Polar Urals (Paga River)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2014, vol. 9, no. 4, available at: http://www.ngtp.ru/rub/2/43_2014.pdf
DOI https://doi.org/10.17353/2070-5379/43_2014
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   Zhuravlev A.V., Vevel’ Ya.A., Iosifidi A.G., Tomsha V.A., Chermnykh V.A. Razrez verhnego devona – nizhnego karbona na myse Kostjanom ostrova Vajgach [Upper Devonian – Lower Carboniferous succession, Kostyanoy Cape, Vaygach Island]. Neftegazovaya Geologiya. Teoriya I Praktika, 2011, vol. 6, no. 1, available at: http://www.ngtp.ru/rub/2/6_2011.pdf
   Zijderveld J.D.A. A.C. Demagnetization of rocks analysis of results. In: Methods in Palaeomagnetism, Ed. Collinson D.W., Amsterdam, Elsevier. 1967. P.254-286.
Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 57_2012 submitted on 09/25/2012 displayed on website on 11/12/2012
17 p.
pdf  Palaeomagnetism of sedimentary rocks of the South Uralian Asha series: new data
Collection of rock samples from the Kuk-Karauk and Basa Formations of the Upper Vendian Asha series on the Basu River, Zilim River and Kuk-Karauk Stream have been studied. Multicomponent structures of the studied rocks magnetization have been identified. Component ages have been estimated by comparison with the data for the East-European plate. The results allow us to trace and to date the main stages of the tectonic history of the belt placed along the western side of the Main Uralian thrust.

Key words: palaeomagnetism, tectonics, Vendian, Southern Ural.
article citation Iosifidi A.G., Mikhaylova V.A., Sal’naya N.V., Khramov A.N. Paleomagnetizm osadochnykh porod ashinskoy serii zapadnogo sklona Yuzhnogo Urala: novye dannye [Palaeomagnetism of sedimentary rocks of the South Uralian Asha series: new data]. Neftegazovaya Geologiya. Teoriya I Praktika, 2012, vol. 7, no. 4, available at: http://www.ngtp.ru/rub/2/57_2012.pdf
References
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   Glasmacher U.A., Wagner G.A., Puchkov V.N. Thermotectonic evolution of the western fold – and – thrust belt, southern Urals, Russia, as revealed by apatite fission track data. Tectonophysics, 2002, vol. 354, issue 1-2, p. 25-48.
   Golovanova I.V., Danukalov K. N., Kozlov V.I., Puchkov V.N., Pavlov V.E., Galle I., Levashova N.M., Sirota G.S., Khayrullin R.R., Bazhenov M.L. Paleomagnetizm verkhnevendskoy basinskoy svity bashkirskogo megasinklinoriya: rezul'taty povtornogo issledovaniya [Paleomagnetism of the Upper Vendian Basinski suite, Bashkirian mega synclinorium: results of re-examination]. Fizika Zemli, 2011, no. 7, p. 67-79.
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Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 6_2011 submitted on 02/08/2011 displayed on website on 02/22/2011
31 p.
pdf  Upper Devonian - Lower Carboniferous succession, Kostyanoy Cape, Vaygach Island
Results of multidisciplinary study of the Upper Devonian – Lower Carboniferous succession of the NE of the Vaygach Island are described. T-R cycles, biostratigraphical units based on foraminifers and conodonts, and magnitostratigraphic zones have been identified in the section for a first time. Due to complete carbonate succession of the Middle Famennian – Upper Visean, the section is considered as a key one of the NW of the Pay-Khoy – Vaygach region and the east of Barents Sea shelf.
Key words: stratigraphy, Upper Devonian, Lower Carboniferous, Foraminifera, Conodonta, palaeomagnetism, Vaygach Island.
article citation Zhuravlev A.V., Vevel’ Ya.A., Iosifidi A.G., Tomsha V.A., Chermnykh V.A. Upper Devonian - Lower Carboniferous succession, Kostyanoy Cape, Vaygach Island // Neftegazovaya Geologiya. Teoriya I Praktika. – 2011. -V.6. - #1.- http://www.ngtp.ru/rub/2/6_2011.pdf
References
Regional petroleum geology
Section editor – PhD in geology and mineralogy Makarevich V.N.
Article # 21_2010 submitted on 04/07/2010 displayed on website on 12/27/2010
18 p.
pdf  To the history of thrust structures of the Pai-Khoi and Polar Urals: paleomagnetic data for Early Permian and early triassic sediments
Collection of Early Permian rocks (P1gs, artinskian stage, section r. Yabtoyakha (Gusinaya), south-west of the Pai-Khoi have been studied. Analysis of the inferred new and published paleomagnetic data for the fortland structures of the Polar Urals and Pai-Khoi showed that horizontal orientation of paleomagnetic directions reflect the clockwise and counterclockwise rotations of the these structures consequently. Values of these rotation angles and total thrust amplitudes for the Pai-Khoi structures are estimated.

Key words: paleomagnetic directions, geodynamic, collision, thrust, Pai-Khoi.
article citation Iosifidi A.G., Khramov A.N. To the history of thrust structures of the Pai-Khoi and Polar Urals: paleomagnetic data for Early Permian and early triassic sediments // Neftegazovaya Geologiya. Teoriya I Praktika. – 2010. - V.5. - #2.- http://www.ngtp.ru/rub/4/21_2010.pdf
References
Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 45_2009 submitted on 12/10/2009 displayed on website on 12/14/2009
20 p.
pdf Upper Devonian - Lower Carboniferous key sequence on the Talota river, Timan-Pechora province - results of lithologic, biostratigraphic and paleomagnetic researches
The results of complex studying the Upper Devonian - Lower Carboniferous key sequence on the Talota river (north of the Vashutkino-Talota zone of overthrusts, Timan-Pechora province) are presented. The tectonic twinning of the sequence on the zone of overthrusts is proved by biostratigraphy data. The parautochthonous and allochthonous parts of the sequence are dated by foraminifera and conodonts. The first part contains Early Famenian-Late Visean deposits, the second part - Late Famenian-Serpukhovsk deposits. Breaks in sedimentations are established in the Lower Tournaisian and Lower Visean. The presence of an ancient secondary prefolded component of magnetization, confined to the definite parts of the sequence and caused by tectonic and hypergene processes, is established. The direction of this magnetization allowed reconstructing the prefolded (Middle Paleozoic) position of the allochthone and parautochthone.
Key words: Upper Devonian, Lower Carboniferous, key sequence, Timan-Pechora province, stratigraphy, paleomagnetology, tectonics.

Sequence description by Eremenko N.M. and Zhuravlev A.V. is provided in the Annex 1.
article citation Eremenko N.M., Zhuravlev A.V., Iosifidi A.G., Popov V.V., Khramov A.N., Vevel Ya.A., Nickolaev A.I. Upper Devonian - Lower Carboniferous key sequence on the Talota river, Timan-Pechora province - results of lithologic, biostratigraphic and paleomagnetic researches // Neftegazovaya Geologiya. Teoriya I Praktika. - 2009. - V.4. - #4.- http://www.ngtp.ru/rub/2/45_2009.pdf
Eremenko N.M., Zhuravlev A.V., Iosifidi A.G., Popov V.V., Khramov A.N., Vevel Ya.A., Nickolaev A.I. Upper Devonian - Lower Carboniferous key sequence on the Talota river, Timan-Pechora province - results of lithologic, biostratigraphic and paleomagnetic researches // Neftegazovaya Geologiya. Teoriya I Praktika. - 2009. - V.4. - #4.- http://www.ngtp.ru/rub/2/45prilojenie_2009.pdf
References