FIRST RESULTS OF U−Th/He DATING OF EPIGENETIC PYRITE FROM ROCKS OF THE BAZHENOV FORMATION, WESTERN SIBERIA

O. V. Yakubovich; Якубович О. В.; N. A. Vasilyeva; Васильева Н. А.; K. Yu. Vasilyeva; Васильева К. Ю.; M. O. Anosova; Аносова М. О.; A. B. Kotov; Котов А. Б.; M. M. Podolskaya; Подольская М. М.; B. M. Gorokhovskiy; Гороховский Б. М.

doi:10.31857/S2686739723601047

FIRST RESULTS OF U−Th/He DATING OF EPIGENETIC PYRITE FROM ROCKS OF THE BAZHENOV FORMATION, WESTERN SIBERIA

Authors: Yakubovich O.V.¹^,2, Vasilyeva N.A.¹^,2, Vasilyeva K.Y.¹, Anosova M.O.³, Kotov A.B.², Podolskaya M.M.³, Gorokhovskiy B.M.²
Affiliations:
1. St. Petersburg State University
2. Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
3. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences
Issue: Vol 513, No 1 (2023)
Pages: 77-82
Section: GEOCHEMISTRY
Submitted: 26.12.2023
Published: 01.11.2023
URL: https://bakhtiniada.ru/2686-7397/article/view/232978
DOI: https://doi.org/10.31857/S2686739723601047
EDN: https://elibrary.ru/LBIVUB
ID: 232978

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Abstract
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Abstract

U–Th/He method was applied to determine the age of epigenetic pyrite from the oil source rocks of the Bazhenov Formation, Western Siberia. Results indicate the possibility to date the post-sedimentation processes in a sedimentary basin by authigenic pyrite U–Th/He dating. The U–Th/He isochron age of pyrite (n = 7) from the dolomites of the Bazhenov Formation within the Frolovskaya megadepression is much younger than the age of sedimentation and corresponds to the Santonian-Cenomanian stages of the Upper Cretaceous (90 ± 8 Ma).

Keywords

pyrite, Bazhenov formation, Western Siberia, U–Th/He dating, basin analysis

References

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