Polychronous (360-2940 Ma) zirconology of the “Riphean” metabasalts of the Bolshoi Miass (Southern Urals)
https://doi.org/10.24930/1681-9004-2022-22-3-277-283
Abstract
Research subject. Volcanogenic formations of the Navysh complex of the Ai Formation in the Taratash anticlinorium of the Southern Urals, which have been thought to be Lower Riphean. Results. The U-Pb dating of zircons from metabasalts of the Navysh complex were obtained, reflecting specific characteristics of their age. The isotope parameters of zircons of the К2247 sample divide them into two groups. The first group unites the ancient crystals aged Т1 = 2943 ± 31 and Т2 = 2713 ± 49 Ma, while crystals in the second group belongs to a much age - Т3 = 451.6 ± 9.1 and Т4 = 366.4 ± 6.0 Ma. No Riphean crystals were found in sample К2247. Conclusions. The dates obtained for the supposed Riphean complexes have shown that the Paleozoic magmatism took place not only in the eastern slope of the Urals, but also in the western slope. This process occurred several times.
Supporting agencies: The work was performed within the state task of the Institute of Geology of the RAS Ufimian Federal Research Centre (FMRS-2022-0013) and the UBRAS Institute of Geology and Geochemistry (АААА-А19-119072990020-6)
About the Authors
A. A. Krasnobaev
A.N. Zavaritsky Institute of Geology and Geochemistry, Urals Branch of RAS
Russian Federation
Russian Federation
Artur А. Krasnobaev.
15 Akad. Vonsovsky st., Ekaterinburg 620110.
V. N. Puchkov
A.N. Zavaritsky Institute of Geology and Geochemistry, Urals Branch of RAS
Russian Federation
Russian Federation
Viktor N. Puchkov.
15 Akad. Vonsovsky st., Ekaterinburg 620110.
N. D. Sergeeva
Institute of Geology of the Ufimian Federal Research Centre of the Russian Academy of Sciences
Russian Federation
Russian Federation
Nina D. Sergeeva.
16/2 K Marx st.,450078 Ufa.
S. V. Busharina
A.N. Zavaritsky Institute of Geology and Geochemistry, Urals Branch of RAS
Russian Federation
Russian Federation
Sof'ya V. Busharina.
15 Akad. Vonsovsky st., Ekaterinburg 620110.
N. N. Farrakhova
A.N. Zavaritsky Institute of Geology and Geochemistry, Urals Branch of RAS
Russian Federation
Russian Federation
Nadezhda N. Farrakhova.
15 Akad. Vonsovsky st., Ekaterinburg 620110.
S. A. Dyakova
Institute of Geology of the Ufimian Federal Research Centre of the Russian Academy of Sciences
Russian Federation
Russian Federation
Svetlana А. Dyakova.
16/2 K Marx st.,450078 Ufa.
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Review
For citations:
Krasnobaev A.A., Puchkov V.N., Sergeeva N.D., Busharina S.V., Farrakhova N.N., Dyakova S.A. Polychronous (360-2940 Ma) zirconology of the “Riphean” metabasalts of the Bolshoi Miass (Southern Urals). LITHOSPHERE (Russia). 2022;22(3):277-283. (In Russ.) https://doi.org/10.24930/1681-9004-2022-22-3-277-283
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