Geologicheskii Vestnik

A paleomagnetic study of the rocks of the Lemeza and Bederysh subformations of the Zilmerdak Formation from a section fragment located on the Zilim River in the Bakeevo village area has been carried out. The section is represented by terrigenous, mainly red-colored rocks. The studied fragment with a thickness of ~40 m lies monocline, the average elements of occurrence are about 80°/55°. A characteristic paleomagnetic direction was obtained for the section and compared with those from the underlying Biryan Subformation of the Zilmerdak Formation and the overlying Katav Formation. The result of the work may be important for the regional geology of the Southern Urals and the study of the behavior of the geomagnetic field in the Late Riphean.

paleomagnetism, Southern Urals, Upper Riphean, Zilmerdak Formation

• Golovanova I.V., Danukalov K.N., Sal'manova R.Yu. (2022) Pozdnepaleozojskoe peremagnichivanie — nezavisimyj indikator protekaniya tektonicheskih processov na Yuzhnom Urale [Late paleozoic remagnetisation as an independent indicator of tectonic processes in the Southern Urals]. Geologicheskij vestnik, (2), 56–68. (In Russian). DOI: 10.31084/2619-0087/2022-2-5
• Golovanova I.V., Danukalov K.N., Sal'manova R.Yu., Parfir'ev N.P. (2024) Itogi paleomagnitnogo izucheniya neoproterozojskoj katavskoj svity na Yuzhnom Urale. [Results of Paleomagnetic Study of the Neoproterozoic Katav Formation (Southern Urals)] // Georesursy, 26 (4), 116–128. (In Russian). DOI: 10.18599/grs.2024.4.15
• Danukalov N.F., Komissarova R.A., Mikhailov P.N. (1982) Paleomagnetizm rifeya i venda Yuzhnogo Urala [Paleomagnetism of the Riphean and Vendian of the Southern Urals]. Stratotip rifeya. Paleontologiya. Paleomagnetizm. Keller B. M. (Ed.). Nauka, Moscow, 121–161. (In Russian).
• Danukalov K.N., Golovanova I.V., Sal’manova R.Yu., Parfir’ev N.P. (2020) Paleomagnitnoe izuchenie krasnocvetnyh porod verhnego rifeya Yuzhnogo Urala [Paleomagnetic study of red-colored rocks of the Upper Riphean in the Southern Urals]. Geologicheskii vestnik, (3), 47–54. (In Russian). DOI: 10.31084/2619–0087/2020-3-3
• Efremov I.V., Veselovskiy R.V. (2023) PMTools: novoye programmnoye obespecheniye dlya analiza paleomagnitnykh dannykh. [PMTools: New application for paleomagnetic data analysis]. Fizika Zemli, (5), 150–158. (In Russian). DOI: 10.31857/S0002333723050022
• Komissarova R.A. (1970) Issledovanie drevnei namagnichennosti nekotorykh osadochnykh porod Yuzhnogo Urala v svyazi s problemoi metakhronnogo peremagnichivaniya. Dis. cand. fi z.mat. nauk [Study of the ancient magnetization of some sedimentary rocks of the Southern Urals in connection with the problem of metachronous magnetization reversal. Cand. phys.-mat. sci. dis.]. Moscow, IFZ AN SSSR, 140 p. (In Russian).
• Maslov A.V., Krupenin, M.T., Gareev, E.Z., Anfimov, L.V. (2001). Rifej zapadnogo sklona Yuzhnogo Urala (klassicheskie razrezy, sedimento- i litogenez, minerageniya, geologicheskie pamyatniki prirody) [The Riphean of the Southern Urals western flank (key sections, sedimentoand lithogenesis, mineralization, natural geologic monuments)]. Yekaterinburg: Institute Geology and Geochemistry, 4, 134 p. (In Russian).
• Maslov A.V., Erohin E.V., Gerdes A., Ronkin Yu.L., Ivanov K.S. (2018) Pervye rezul'taty U-Pb LA-ICP-MS-izotopnogo datirovaniya oblomochnyh cirkonov iz arkozovyh peschanikov bir'yanskoj podsvity zil'merdakskoj svity verhnego rifeya (Yuzhnyj Ural) [The first results of U-Pb LA-ICP-MS isotope dating of clastic zircons from arkose sandstones of the Biryan sub-formation of the Zilmerdak formation of the Upper Riphean (Southern Urals)]. DAN, 482 (5), 558–561. (In Russian).
• Pavlov V.E., Krupenin M.T. (2008) Novye paleomagnitnye dannye po katavskoj svite: k voprosu o blokovom stroenii Bashkirskogo antiklinoriya [New paleomagnetic data on the Katava Formation: on the block structure of the Bashkir anticlinorium]. Trudy Yuzhno-Ural'skogo gosudarstvennogo prirodnogo zapovednika, (1), 178–182. (In Russian).
• Parfiriev N.P., Danukalov K.N., Golovanova I.V., Dyakova S.A. (2023) Pervye rezul’taty testa vnutriforma-cionnyh konglomeratov v katavskoj svite pozdnego rifeya (Yuzhnyj Ural) [First results of the intraformational conglom-erate test of the Late Riphean Katav Formation (Southern Urals)]. Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki, 165 (4), 550–562. (In Russian). DOI: 0.26907/2542-064X.2023.4.550–562
• Pavlov V.E., Galle I. (2009) Izvestnyaki katavskoj svity: unikal’nyj primer peremagnichivaniya ili ideal’nyj registrator neoproterozojskogo geomagnitnogo polya? [Katav limestones: a unique example of remagnetization or an ideal recorder of the Neoproterozoic geomagnetic field?]. Fizika Zemli — Izvestiya. Physics of the Solid Earth, (1), 33–43. (In Russian).
• Puchkov V.N. (2010) Geologiya Urala i Priural'ya (aktual'nyye voprosy stratigrafii, tektoniki, geodinamiki i metallogenii) [Geology of the Urals and Cis-Urals (actual problems of stratigraphy, tectonics/ geodinamics and metallogeny)]. DesignPoligraphService. Ufa. 280 p. (In Russian).
• Sergeeva N.D. D'yakova S.A. (2022) Stratotipicheskie i opornye razrezy katavskoj i inzerskoj svit karatauskoj serii verhnego rifeya v Inzerskom sinklinorii (Yuzhnyj Ural) [Stratotype and reference sections of the Katav and Inzer Formation the Karatau Group of the Upper Riphean in the Inzer synclinorium (Southern Urals).]. Geologicheskij vestnik, (1), 94–110. (In Russian). DOI: 10.31084/2619-0087/2022-1-8
• Sergeeva N.D., Puchkov V.N. (2022) Regional'naya stratigraficheskaya skhema otlozhenij verhnego i zavershayushchego Rifeya i Venda Yuzhnogo Urala (PROEKT 2022) [Regional stratigraphic scheme of the upper and final riphean and vendian deposits of the Southern Urals (Project 2022)]. Geologicheskij vestnik, (2), 3–14. (In Russian). DOI: 10.31084/2619-0087/2022-2-1
• Shipunov S.V. (1991) Paleomagnetizm katavskoj svity, Yuzhnyj Ural [Paleomagnetism Katav Formation, Southern Urals]. Fizika Zemli — Izvestiya. Physics of the Solid Earth, (5), 38–50. (In Russian).
• Enkin R.J. (1994) A computer program package for analysis and presentation of paleomagnetic data. Sidney, B.C.: Pacific Geoscience Centre. Geological Survey of Canada, 16 p.
• Evans D.A.D., Pesonen L.J., Eglington B.M., Elming S.-Å., Gong Z., Li Z.-X., McCausland P.J., Meert J.G., Mertanen S., Pisarevsky S.A., Pivarunas A.F., Salminen J.M., Swanson-Hysell N., Torsvik T.H., Trindade R.I.F., Veikkolainen T., Zhang S. (2021) Chapter 19. An expanding list of reliable paleomagnetic poles for Precambrian tectonic reconstructions. In: Pesonen L.J., Salminen J., Evans D.A.D., Elming S.-Å., Veikkolainen T. (Eds.), Ancient Supercontinents and the Paleogeography of Earth. Elsevier, 605–640. DOI: 10.1016/B978-0-12-818533-9.00007-2
• Golovanova I.V., Danukalov K.N., Salmanova R.Yu., Levashova N.M., Parfiriev N.P., Sergeeva N.D., Meert J.G. (2023) Magnetic field hyperactivity during the early Neoproterozoic: A paleomagnetic and cyclostratigraphic study of the Katav Formation, southern Urals, Russia. Geoscience Frontiers, 14 (4), 101558. DOI: 10.1016/j.gsf.2023.101558
• Kuznetsov A.B., Bekker A., Ovchinnikova G.V., Gorokhov I.M., Vasilyeva I.M. (2017) Unradiogenic strontium and moderate-amplitude carbon isotope variations in early Tonian seawater after the assembly of Rodinia and before the Bitter Springs Excursion. Precambr. Res., 298, 157–173. DOI: 10.1016/j.precamres.2017.06.011
• Pavlov V., Gallet Y. (2010) Variations in geomagnetic reversal frequency during the Earth’s middle age. Geochemistry, Geophysics, Geosystems, 11 (1), Q01Z10. DOI: 10.1029/2009GC002583