Regional carbon isotope curve and biotic events in the Silurian of the Western slope of the Subpolar Urals and Chernov Uplift

Beznosova, T. M.; Matveev, V. A.

doi:10.19110/geov.2022.9.4

Vestnik of Geosciences

2022

DOI: 10.19110/geov.2022.9.4

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Regional carbon isotope curve and biotic events in the Silurian of the Western slope of the Subpolar Urals and Chernov Uplift

T. M. Beznosova

V. A. Matveev

Abstract: We present a new regional event scale based on a generalized analysis of results of determination of event-stratigraphic boundaries of biotic events of various levels and 13C isotope anomalies in studied reference sections of the Subpolar Urals and the Chernov Uplift. The combined regional curve of carbon isotopic composition allows finding out several isotopic events in the Silurian.

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2024

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Cited by 1 publication

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Stratotypic section of the Wenlockian Voyvyv horizon (Western slope of the Subpolar Urals)

Beznosova,

Matveev

2024

Lithosphere

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Research subject. The paper presents the results of a study into the carbonate-terrigenous section of 197.8 m-thick Wenlockian section in the Shchugor River basin, which is proposed as the stratotype of the regional horizon. Materials and methods. The study was based on numerous samples from Lower Silurian deposits collected by the authors in different years during fieldwork on the Western slope of the Circumpolar Urals and the Chernov and Chernyshev uplifts, as well as the biostratigraphic, paleontological, lithological, and C-isotopic data obtained during these works. Results. The obtained data allowed revising some of the established ideas about the structure of the Lower Silurian section and the position of the boundary level between the Llandoverian and Wenlockian in the Subpolar Urals and to identify a new regional subdivision with the name “Voyvyv”. The traced formation conditions of shallow carbonate sediments of the Voyvyv horizon and the consistent change of zonal taxa of marine fauna in the stratotype section indicate similarity with coeval strata on the Chernov and Chernyshev uplifts and Dolgy Island. Conclusions. The results of the study of Wenlockian Voyvyv deposits in the Timan-North Urals region showed that the section in the Shchugor River basin in outcrop 10c can be considered the most informative in the Northern Urals region in terms of exposure degree, established stratigraphic completeness, and preservation of macro- and microfauna.

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Stratotypic section of the Wenlockian Voyvyv horizon (Western slope of the Subpolar Urals)

Beznosova,

Matveev

2024

Lithosphere

View full text Add to dashboard Cite

show abstract

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Regional carbon isotope curve and biotic events in the Silurian of the Western slope of the Subpolar Urals and Chernov Uplift

Cited by 1 publication

References 21 publications

Stratotypic section of the Wenlockian Voyvyv horizon (Western slope of the Subpolar Urals)

Stratotypic section of the Wenlockian Voyvyv horizon (Western slope of the Subpolar Urals)

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