Abstract
A detailed record of the δ13Сorg value has been obtained for the first time in Permian mudstones of the Taskan Basin (Omulevka Block, Northeast Asia) covering the interval from the Upper Kungurian, Roadian, Wordian, Capitanian, and Lower Wuchia**ian stages. The value of δ13Сorg varies from –23.81‰ (mid-Kungurian) to –26.97‰ (lower Wuchia**ian). Three δ13Сorg negative excursions were clearly distinguished in the section including the upper part of the Kungurian Stage of the Lower Permian, the lower part of the Capitanian, and the boundary between the Capitanian and Wuchia**ian stages. These excursions are in good agreement with the episodes of mass extinction that we established earlier [12], and they are most likely associated with periods of activity of island-arc magmatism in the region during the Permian.
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ACKNOWLEDGMENTS
The authors are grateful to B.G. Pokrovskii (Institute of Geology, Russian Academy of Sciences) and an anonymous reviewer for comments that helped to improve the manuscript.
Funding
This study was carried out within the research theme “Evolution of Magmatic, Sedimentary, and Metamorphic Complexes of the Arctic and Paleopacific North” of the Shilo Northeast Interdisciplinary Scientific Research Institute, Far East Branch, Russian Academy of Sciences, and was supported by the Ministry of Science and Higher Education of the Russian Federation under Agreement no. 075-15-2022-299 as part of the program of creating and develo** the World-Class Research Center for the Rational Development of Liquid Hydrocarbon Reserves of the Planet.
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Biakov, A.S., Vedernikov, I.L., Goryachev, N.A. et al. The First Detailed δ13Соrg Record in Permian Mudstones of the Taskan Basin (Omulevka Block): A Reflection of Biospheric Events in Northeast Asia. Dokl. Earth Sc. 513, 1110–1114 (2023). https://doi.org/10.1134/S1028334X23601724
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DOI: https://doi.org/10.1134/S1028334X23601724