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THE FIRST DISCOVERY OF ISOTOPIC (δ34S, Δ33S) SULFUR ANOMALIES IN AUTHIGENIC SULFIDES FROM THE PERMIAN-TRIASSIC BOUNDARY DEPOSITS OF SIBERIA
- Authors: Vysotskii S.V1, Khanchuk A.I1, Velivetskaya T.A1, Ignatiev A.V1, Zakharov Y.D1, Yakovenko V.V1, Biakov A.S2, Brynko I.V2, Vedernikov I.L2, Kutygin R.V3
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Affiliations:
- Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences
- N.A. Shilo North-East Scientific Research Institute, Far Eastern Branch of the Russian Academy of Sciences
- Institute of Geology of Diamond and Precious Metals, Siberian Branch of the Russian Academy of Sciences
- Issue: Vol 524, No 2 (2025)
- Pages: 226-232
- Section: GEOCHEMISTRY
- Submitted: 08.12.2025
- Published: 15.10.2025
- URL: https://journals.rcsi.science/2686-7397/article/view/356832
- DOI: https://doi.org/10.7868/S3034506525100064
- ID: 356832
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Abstract
The article reports a unique discovery of isotopic anomalies established by studying the ratios of three stable sulfur isotopes (32S, 33S and 34S) in authigenic sulfides from sedimentary rocks formed at the end of the Permian (~252 million years ago) in northeastern Asia (Suol section, Southern Verkhoyanye, Eastern Siberia). The range of δ34S variations reaches 65‰, the deviation of Δ33S values from zero values varies from 0.11‰ to 0.46‰. The presence of sulfur isotopic anomalies at high paleolatitudes of the Boreal Superrealm is recorded for the first time. The anomalies indicate intense UV fluxes penetrating the Earth's atmosphere, which may be related to the weakening of ozone protection as a result of the decrease in magnetic field intensity and the release of large amounts of gaseous sulfur compounds and halogens into the atmosphere during massive volcanic eruptions. Active hard UV radiation had a direct, deadly effect on both terrestrial and marine (primarily surface plankton) biota.
About the authors
S. V Vysotskii
Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences
Author for correspondence.
Email: svys@mail.ru
Vladivostok, Russia
A. I Khanchuk
Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences
Email: svys@mail.ru
Academician of the RAS
Vladivostok, RussiaT. A Velivetskaya
Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences
Email: svys@mail.ru
Vladivostok, Russia
A. V Ignatiev
Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences
Email: svys@mail.ru
Vladivostok, Russia
Yu. D Zakharov
Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences
Email: svys@mail.ru
Vladivostok, Russia
V. V Yakovenko
Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences
Email: svys@mail.ru
Vladivostok, Russia
A. S Biakov
N.A. Shilo North-East Scientific Research Institute, Far Eastern Branch of the Russian Academy of Sciences
Email: svys@mail.ru
Magadan, Russia
I. V Brynko
N.A. Shilo North-East Scientific Research Institute, Far Eastern Branch of the Russian Academy of Sciences
Email: svys@mail.ru
Magadan, Russia
I. L Vedernikov
N.A. Shilo North-East Scientific Research Institute, Far Eastern Branch of the Russian Academy of Sciences
Email: svys@mail.ru
Magadan, Russia
R. V Kutygin
Institute of Geology of Diamond and Precious Metals, Siberian Branch of the Russian Academy of Sciences
Email: svys@mail.ru
Yakutsk, Russia
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