Boundary between the Lower and Middle Carboniferous in the Eastern Urals: New isotope–geochronological data |
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| Authors: | G A Mizens T I Stepanova S A Dub A B Kuznetsov |
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| Institution: | 1.Institute of Geology and Geochemistry, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia;2.Institute of Precambrian Geology and Geochronology,Russian Academy of Sciences,St. Petersburg,Russia |
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| Abstract: | 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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