Stratigraphy and Correlation of Basal Sections of the Lower Precambrian of the Southern Part of the Siberian Craton.
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| Title: | Stratigraphy and Correlation of Basal Sections of the Lower Precambrian of the Southern Part of the Siberian Craton. |
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| Authors: | Bogdanov, Yu. B.1 (AUTHOR), Anisimova, S. A.1 (AUTHOR) svetanisimova2008@rambler.ru |
| Source: | Stratigraphy & Geological Correlation. Apr2025, Vol. 33 Issue 2, p143-156. 14p. |
| Subject Terms: | *Earth sciences, *Archaean, *Precambrian, *Proterozoic Era, *Geology |
| Abstract: | For the southern part of the Siberian Craton, the geological and geochronological characteristics of the reference sections of six Lower Precambrian stratoregions are presented. These sections were correlated for the first time, which served as a basis for a refined regional stratigraphic scheme. As a result, three major regional subdivisions (from bottom to top, Sahabori, Udokan, and Ulkan) were separated in the rank of suprahorizons in the regional stratigraphic scheme, as in the scheme accepted by Interdepartmental Stratigraphic Committee in 1991, in terms of their composition and age. For the first time, two regional horizons within the Udokan suprahorizon were proposed with the operating names Kodar–Chinei (lower) and Kemen (upper). These regional subdivisions are separated by unconformities and stratigraphic gaps. It can be assumed that the lower boundary age of the Kemen horizon is around 2.05 Ga; the lower boundaries of the Udokan and Ulkan suprahorizons date back to around 1.9 Ga. It is likely that these suprahorizons were separated by a long stratigraphic hiatus. The stratigraphic boundaries between the Sahabori suprahorizon and the lower Udokan suprahorizon have not been determined. According to the isotopic age data, the regional subdivisions are correlated with those in the General Stratigraphic Scale of the Lower Precambrian of Russia. The Sahabori suprahorizon undoubtedly belongs to the Upper Archean (Lopian) Eonothem, while the Udokan and Ulkan suprahorizons belong to the Lower Proterozoic (Karelian) Eonothem. The undivided Lower and Upper Karelian erathems include the rocks of the Kodar–Chinei horizon. The deposits of the Kemen horizon and Ulkan suprahorizon belong to the Upper Karelian Erathem. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 184872959 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Stratigraphy and Correlation of Basal Sections of the Lower Precambrian of the Southern Part of the Siberian Craton. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Bogdanov%2C+Yu%2E+B%2E%22">Bogdanov, Yu. B.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Anisimova%2C+S%2E+A%2E%22">Anisimova, S. A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> svetanisimova2008@rambler.ru</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Stratigraphy+%26+Geological+Correlation%22">Stratigraphy & Geological Correlation</searchLink>. Apr2025, Vol. 33 Issue 2, p143-156. 14p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Earth+sciences%22">Earth sciences</searchLink><br />*<searchLink fieldCode="DE" term="%22Archaean%22">Archaean</searchLink><br />*<searchLink fieldCode="DE" term="%22Precambrian%22">Precambrian</searchLink><br />*<searchLink fieldCode="DE" term="%22Proterozoic+Era%22">Proterozoic Era</searchLink><br />*<searchLink fieldCode="DE" term="%22Geology%22">Geology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: For the southern part of the Siberian Craton, the geological and geochronological characteristics of the reference sections of six Lower Precambrian stratoregions are presented. These sections were correlated for the first time, which served as a basis for a refined regional stratigraphic scheme. As a result, three major regional subdivisions (from bottom to top, Sahabori, Udokan, and Ulkan) were separated in the rank of suprahorizons in the regional stratigraphic scheme, as in the scheme accepted by Interdepartmental Stratigraphic Committee in 1991, in terms of their composition and age. For the first time, two regional horizons within the Udokan suprahorizon were proposed with the operating names Kodar–Chinei (lower) and Kemen (upper). These regional subdivisions are separated by unconformities and stratigraphic gaps. It can be assumed that the lower boundary age of the Kemen horizon is around 2.05 Ga; the lower boundaries of the Udokan and Ulkan suprahorizons date back to around 1.9 Ga. It is likely that these suprahorizons were separated by a long stratigraphic hiatus. The stratigraphic boundaries between the Sahabori suprahorizon and the lower Udokan suprahorizon have not been determined. According to the isotopic age data, the regional subdivisions are correlated with those in the General Stratigraphic Scale of the Lower Precambrian of Russia. The Sahabori suprahorizon undoubtedly belongs to the Upper Archean (Lopian) Eonothem, while the Udokan and Ulkan suprahorizons belong to the Lower Proterozoic (Karelian) Eonothem. The undivided Lower and Upper Karelian erathems include the rocks of the Kodar–Chinei horizon. The deposits of the Kemen horizon and Ulkan suprahorizon belong to the Upper Karelian Erathem. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=184872959 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S0869593824700291 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 143 Subjects: – SubjectFull: Earth sciences Type: general – SubjectFull: Archaean Type: general – SubjectFull: Precambrian Type: general – SubjectFull: Proterozoic Era Type: general – SubjectFull: Geology Type: general Titles: – TitleFull: Stratigraphy and Correlation of Basal Sections of the Lower Precambrian of the Southern Part of the Siberian Craton. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Bogdanov, Yu. B. – PersonEntity: Name: NameFull: Anisimova, S. A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 08695938 Numbering: – Type: volume Value: 33 – Type: issue Value: 2 Titles: – TitleFull: Stratigraphy & Geological Correlation Type: main |
| ResultId | 1 |
