Email this article Epigenetic graphitization in the basement of the Siberian craton - evidence of the migration of hydrocarbon-enriched fluids in the paleoproterozoic
- Authors: Savelyeva V.B.1, Danilova Y.V.1, Shumilova T.G.2, Ivanov A.V.1, Danilov B.S.1, Bazarova E.P.1
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Affiliations:
- Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
- N.P. Yushkin Institute of Geology of the Komi Science Center of the Ural Branch of the Russian Academy of Sciences
- Issue: Vol 486, No 2 (2019)
- Pages: 217-222
- Section: Geology
- URL: https://journals.eco-vector.com/0869-5652/article/view/13439
- DOI: https://doi.org/10.31857/S0869-56524862217-222
- ID: 13439
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Abstract
For the first time, diagnostics and structural studies of the сarbonaceous material (СM) of quartz-muscovite dinamoschists from schistase zones in biotite migmatites, pegmatites and diabases of the southern part of the Baikal ledge of the Siberian craton were performed. The сarbonaceous material is represented by clearly and microcrystalline graphite with residual hydrocarbon radicals. Native Ni, Sn, zincous Cu, intermetallic compounds of Fe-Ni composition, copper sulfides, rutile, monazite, and zircon were found in intergrowths with СM. The carbon isotopic composition is from -29.19 to -31.58‰, with the exception of CM from schistated diabase with δ13C = -24.93 ‰. The 40Ar/39Ar-dating of muscovite gave an age of 1947 ± 7.8 Ma, indicating a relationship between dynamometamorphism and the accretion of the Akitkan folded system with ancient craton complexes. It is concluded that the deposition of native carbon and metals is caused by the migration of essentially hydrocarbon fluid in the upper crustal formations.
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About the authors
V. B. Savelyeva
Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
Author for correspondence.
Email: vsavel@crust.irk.ru
Russian Federation, 128, Lermontova street, Irkutsk, 664033
Yu. V. Danilova
Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
Email: vsavel@crust.irk.ru
Russian Federation, 128, Lermontova street, Irkutsk, 664033
T. G. Shumilova
N.P. Yushkin Institute of Geology of the Komi Science Center of the Ural Branch of the Russian Academy of Sciences
Email: vsavel@crust.irk.ru
Russian Federation, 54, Pervomaiskaya street, Syktyvkar, 167982
A. V. Ivanov
Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
Email: vsavel@crust.irk.ru
Russian Federation, 128, Lermontova street, Irkutsk, 664033
B. S. Danilov
Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
Email: vsavel@crust.irk.ru
Russian Federation, 128, Lermontova street, Irkutsk, 664033
E. P. Bazarova
Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
Email: vsavel@crust.irk.ru
Russian Federation, 128, Lermontova street, Irkutsk, 664033
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