U-Th-He dating of pyrite from the Uzelga Copper-Zinc massive sulfide deposit (South Urals, Russia): first application of a new geochronometer

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Abstract


Based on a study of pyrite from the Uzelga Cu-Zn volcanogenic massive sulfide (VMS) deposit (South Urals) the age of ore mineralization was first determined with the direct age-dating method, based on the fraction of radiogenic helium, incorporated into the pyrite crystal lattice from submicron inclusions of U and Th minerals. Taking into account the measurement errors, the obtained age of 377 ± 8 Ma (MSWD = 1.2) is quite consistent with the independent age dates available for the ore mineralization (Late Eifelian-Early Givetian, 385-390 Ma).


About the authors

O. V. Yakubovich

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences; Saint-Petersburg State University

Author for correspondence.
Email: olya.v.yakubovich@gmail.com

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034; 7/9, Universitetskaya embankment, Saint-Petersburg, 199034

I. V. Vikentyev

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Email: olya.v.yakubovich@gmail.com

Russian Federation, 35, Staromonetny, Moscow, 119017

O. V. Zarubina

Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences

Email: olya.v.yakubovich@gmail.com

Russian Federation, PBox 9, 1a, Favorsky street, Irkutsk, 664033

N. V. Bryanskiy

Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences

Email: olya.v.yakubovich@gmail.com

Russian Federation, PBox 9, 1a, Favorsky street, Irkutsk, 664033

B. M. Gorokhovskii

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: olya.v.yakubovich@gmail.com

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034

A. B. Kotov

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: olya.v.yakubovich@gmail.com

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034

S. I. Dril

Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences

Email: olya.v.yakubovich@gmail.com

Russian Federation, PBox 9, 1a, Favorsky street, Irkutsk, 664033

N. S. Bortnikov

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Email: olya.v.yakubovich@gmail.com

Russian Federation, 35, Staromonetny, Moscow, 119017

Academician of the Russian Academy of Sciences

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