Lithologic and facies zones of the Upper-Riphean and Vendian deposits of the Cis-patom deflection and the Aldan anteclise northern margins
UDC: 551.7.02
DOI: 10.33285/2073-9028-2023-1(310)-21-33
Authors:
LOBUSEV ALEXANDER V.
1,
RYBALCHENKO VADIM V.2,
KOSHKINA ALYONA I.1,
KUZNETSOVA GALINA P.1
1 Gubkin Russian State University (National Research University) of Oil and Gas, Moscow, Russian Federation
2 Gazprom, St. Petersburg, Russian Federation
Keywords: lithological and facies zoning, correlation of Upper-Riphean and Vendian deposits
Annotation:
Lithological-facies zoning refers to the allocation within the studied territory of the same-age complexes of a certain lithological composition, accumulated in various facies settings. The basis of the lithological-facies zoning was the results of a comprehensive analysis of the structure of the Upper Riphean-Vendian deposits based on the materials of geophysical and lithological studies, as well as current ideas about the paleogeography of the northern zones of the Pre-Atomic trough and the Aldan anteclise at the corresponding geological time. For the deposits of the Torginskaya, Seralakhskaya, Byukskaya, Uspunskaya, Kudulakhskaya and Yuryakhskaya formations (R3–V) in the sedimentary cover of the northern margins of the Predatomsky trough and the Aldan anteclise of the eastern part of the Siberian platform, lithological-facies zoning schemes are proposed. Of the thirty-five wells drilled in the territory of the studied region, the group of wells of the Bysakhtakh area, with a generalized lithological characteristic of the deposits under consideration, has been studied most fully by geophysical and core studies. Among other wells, only seven have descriptions of core and sections of Riphean-Vendian deposits. The substantial limitations of the factual material make it difficult to solve the problem of restoring the physical and geographical features of the environment of the area during the Riphean-Vendian time and establishing their differences from the conditions that existed at the same time in adjacent areas. In this regard, the authors used mainly lithological indicators for wells for which core material and slots were available.
Bibliography:
1. Kuznetsov V.G. Litologia. Osadochnye gornue porody i ih izuchenie. – M.: ООО “Nedra-BiznesCentr”, 2007. – 511 s.
2. Postnikova O.V., Fomisheva L.N., Solov’eva L.V. Paleogeograficheskie i paleogeodinamicheskie uslovia formirovania rifei-vendskogo osadochnogo basseina uga Sibirskoi platformу v svyzi s ego neftegazonosnostiu//Geologiya Nefti i Gaza. – 2008. – № 1. – S. 8–15.
3. Resheniya IV Mezhvedomstvennogo regionalnogo stratigraficheskogo soveshchaniya po utochneniyu i dopolneniyu stratigraficheskikh skhem venda i kembriya vnutrennikh rayonov Sibirskoy platformy. – Novosibirsk: SNIIGGiMS, 1989. – 64 s.
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