The Material Composition of the Сhurochinskaya Formation in the Vishera Diamondiferous Region (Perm Krai)

E. M. Tomilina

Abstract


The results of a study of the mineral composition, structural and textural features of glacial deposits, i.e. tillites, as well as the material composition of the pelitic fraction of the Churochinskaya formation in the Krasnovisherskiy diamondiferous region are presented. Tillites were studied with petrographic and X-ray phase analysis. According to the results of petrographic study of samples of tillitic conglomerates, it was confirmed that the cementing part prevails over the detrital material. Fragments of rocks of different genesis and different sizes, but with almost the same roundness, are immersed in the main mass. The pelitic fraction of bottom sediments consists of a number of minerals: quartz, feldspar of the potassium-sodium variety, clay minerals. In most of the studied samples, clay minerals are represented by illite, occasionally accompanied by chlorite. The initial clay substance of the sediment is one of the valuable indicators of paleogeographic and paleoclimatic sedimentation environments. It is believed that the hydrous micas are formed at the first stages of hypergenesis in the weathering crusts of terrigenous rocks and sediments of the seas and oceans, where they are often found in combination with chlorite. Chlorite is one of the important indicators of sedimentation conditions.

References


Ablizin B.D., Klyugina M.L., Kurbatskaya F.A., Kurbatskiy A.M. 1982. Verkhniy rifey i vend zapadnogo sklona Srednego Urala [Upper Riphean and Vendian of the western slope of the Middle Urals]. Nauka, Moskva, p. 140. (in Russian)

Aksenov Ye.M., Keller B.M., Sokolov B.S. 1978. Obshchaya skhema stratigrafii verkhnego dokembriya Russkoy platformy [General stratigraphic scheme of the Upper Precambrian of the Russian Platform]. Izv. AN SSSR. Ser. geolol., pp. 17-34. (in Russian)

Bekker Yu.R. 1985. Vend Urala. Vendskaya sistema. Istoriko-geologicheskoye i paleontologicheskoye obosnovaniye. T.2. Stratigrafiya i geologicheskiye protsessy [Urals Vendian. Vendian system. Historical, geological and paleontological justification. T.2. Stratigraphy and geological processes.]. Eds. Sokolov B.S., Fedonkin M.A. Nauka, Moskva, pp. 76-83. (in Russian)

Bekker Yu.R. 1968. Pozdnedokembriyskaya molassa Yuzhnogo Urala [Late Precambrian molasse of the Southern Urals]. Nedra, Leningrad, p. 158. (in Russian)

Borovko N.G. 1967. Vend i nizhniy paleozoy Polyudova Kryazha Severnogo Urala [Vendian and Lower Paleozoic of the Polyudov Ridge of the Northern Urals]. VSEGEI, Leningrad, p. 30. (in Russian)

Chochia N.G. 1955. Geologicheskoye stroyeniye Kolvo-Visherskogo kraya [Geological structure of the Kolvo-Vishera region]. Gostoptekhizdat, Leningrad, p. 406. (in Russian)

Chumakov N.M. 1985 Laplandskiy lednikovyy gorizont i yego analogi [Lapland glacial horizon and its analogues]. Vendskaya sistema. Istoriko-geologicheskoye i paleontologicheskoye obosnovaniye. T. 2. Stratigrafiya i geologicheskiye protsessy. Nauka, Moskva, pp. 166–198. (in Russian)

Frank-Kamenetskskiy V.A., Kotov N.V., Goylo E.A. 1983. Transformatsionnyye preobrazovaniya sloistykh silikatov pri povyshennykh r-T parametrakh [Transformation conversion of layered silicates at increased p-T parameters]. Nedra, Leningrad, p. 360. (in Russian)

Iblaminov R.G. 2022. Litologiya Permskogo kraya [Lithology of the Perm krai]. Perm. State. Univ. Perm, p 147. (in Russian)

Kurbatskaya F.A. 1997. O lateralnoy zonalnosti razrezov sparagmitovoy formatsii na Zapadnom Urale [On the lateral zonation of the cross-sections of the sparagmite formation in the Western Urals]. In: Geologia i poleznye iskopaemye Zapadnogo Urala, Perm, pp. 29–30. (in Russian)

Mladshikh S.V., Ablizin B.D. 1967. Stratigrafiya verkhnego dokembriya zapadnogo sklona Srednego Urala [Stratigraphy of the Upper Precambrian of the western slope of the Middle Urals]. Izv. AN SSSR. Ser. geol. 2(67-80). (in Russian)

Paktovskiy Yu.G. 2019. Stadiynost geologicheskogo razvitiya territorii Yuzhnogo Pritimanya v pozdnem proterozoye [Staging of Geological Development of an Area of the Southern Cis-Timan in the Late Proterozoic] Vestnik Permskogo universiteta. Geologiya. 18(2):108–124.(in Russian)

Paktovskiy Yu.G. 2019. Geologicheskoye razvitiye territorii Yuzhnogo Pritimanya v pozdnem proterozoye [Geological development of the territory of the Southern Pritimanye in the Late Proterozoic]. In: Problemy mineralogii, petrografii i metallogenii, Perm, pp. 216–223. (in Russian)

Paktovskiy Yu.G. 2022. Ranniy paleozoy kak stadiya rossypnoy almazanosnosti v yuzhnom Pritimanye (Permskiy kray) [Early Paleozoic as a stage of placer diamond deposits in southern Pritimanye (Perm region)]. Dis. kand. geol.-min. nauk. Perm. (in Russian)

Petrograficheskiy kodeks Rossii. Magmaticheskiye, metamorficheskiye, metasomaticheskiye, impaktnyye obrazovaniya [Petrographic Code of Russia. Magmatic, metamorphic, metasomatic, impact formations]. VSEGEI, SPb 2009, p. 200. (in Russian)

Rentgenografiya osnovnykh tipov porodoobrazuyushchikh mineralov (sloistye i karkasnye silikaty) [X-ray studies of the main types of rockforming minerals (layered and framework silicates)]. Ed. V.A. Frank-Kamenetskogo. Nedra, Leningrad, 1983, p. 359. (in Russian)

Smirnov Yu.D., Borovko N.G., Verbitskaya N.P., Rumyantseva N.A., Bekasova N.B., Gorskiy V.P., Yevdokimov Y.B., Lukyanova L.I. 1977. Geologiya i paleogeografiya zapadnogo sklona Urala [Geology and paleogeography of the western slope of the Urals]. Nedra, Leningrad, p. 199. (in Russian)

Sokolov B.S. 1971. Vend severa Yevrazii [Vendian of the north of Eurasia.] Geologiya i geofizika 6:13-22. (in Russian)

Rietveld H.M. 1967. Line profiles of neutron powder-diffraction peaks for structure refinement. Acta Crystallographica, 22(1):151-152.

Rietveld H.M. 1969. A profile refinement method for nuclear and magnetic structures. Journal of Applied Crystallography, 2(2):65–71.

Suslov S.B., Teterin I.P. 1997. O proiskhozhdenii «ekzoticheskikh» galek v «tillitovidnykh» konglomeratakh verkhnevilvenskoy podsvity venda [On the origin of “exotic” pebble"s in “tillite-like” conglomerates of the Verkhnevilvenskaya subformation of the Vendian]. In: Geologiya i poleznyye iskopayemye Zapadnogo Urala. Perm State Univ., pp. 30–31. (in Russian)

Tomilina E.M., Paktovskiy Yu.G., Isayeva G.A. 2023. Sravnitelnaya kharakteristika pelitovoy fraktsii prob bazalnykh porod devonskogo almazonosnogo kollektora (Permskiy kray) [Comparative characteristics of the pelitic fraction of rocks samples of the Devonian diamond deposit (Perm region)]. In: Geologiya i poleznyye iskopayemyye Zapadnogo Urala. 6(43):75-81. (in Russian)

Yapaskurt O.V. 2008. Litologiya [Lithology]. Izdatelskiy tsentr Akademiya, Moskva, p.336. (in Russian)




DOI: http://dx.doi.org/10.17072/psu.geol.22.4.297

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