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First data on Early Carboniferous intrusive magmatism of the eastern margin of the Middle Urals: Geodynamic conditions and U–Pb isotope constraints |
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| Authors: | I I Kazakov Yu L Ronkin V N Puchkov V N Smirnov A Gerdes A S Faust |
| Institution: | 1.JSC Ural Geological Survey Expedition,Yekaterinburg,Russia;2.Zavaritskii Institute of Geology and Geochemistry, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia;3.Institute of Geology, Ufa Science Center,Russian Academy of Sciences,Ufa,Russia;4.Institut für Geowissenschaften Facheinheit Mineralogie, Petrologie, und Geochemie,Frankfurt am Main,Germany |
| Abstract: | U–Pb LA ICP–MS dating of zircon from rocks of the Nekrasov gabbro–granitoid complex within the eastern margin of the Middle Urals was performed. The average U–Pb age calculated from three concordant measurements (326 ± 8 Ma) shows that their intrusion occurred at the Serpukhov Stage of the Early Carboniferous. According to the ideas on periodization of magmatic processes within the eastern sector of the Middle Urals, the formation of this complex corresponds to the final episodes of the continental marginal (supersubduction) magmatism. |
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