Boundary between the Lower and Middle Carboniferous in the Eastern Urals: New isotope–geochronological data


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The U–Pb age of the boundary between the Lower and Middle Carboniferous has been determined on zircons separated from a volcanic tuff layer within a limestone unit near the roof of the Serpukhovian Stage in an occurrence at the right bank of the Iset’ River. The zircons have been dated using SIMS SHRIMP-II at 320 ± 3 Ma. The result agrees well with the accepted age of the boundary between the Serpukhovian and Bashkirian ages (323.2 ± 0.4 Ma, [1]).

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G. Mizens

Institute of Geology and Geochemistry, Ural Branch

编辑信件的主要联系方式.
Email: mizens@igg.uran.ru
俄罗斯联邦, Yekaterinburg

T. Stepanova

Institute of Geology and Geochemistry, Ural Branch

Email: mizens@igg.uran.ru
俄罗斯联邦, Yekaterinburg

S. Dub

Institute of Geology and Geochemistry, Ural Branch

Email: mizens@igg.uran.ru
俄罗斯联邦, Yekaterinburg

A. Kuznetsov

Institute of Precambrian Geology and Geochronology

Email: mizens@igg.uran.ru
俄罗斯联邦, St. Petersburg

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