EARLY CARBONIFEROUS VOLCANIC COMPLEXES OF THE EAST URAL ZONE OF THE SOUTHERN URALS: NEW ISOTOPE‑GEOCHRONOLOGICAL AND PALEOMAGNETIC DATA
N.V. Pravikova1,2, A.Yu. Kazansky3,4, A.V. Tevelev1, A.A. Debabova1, A.V. Chistyakova2, M.Yu. Shur1,2, R.V. Veselovskiy1,2, S.E. Urbanovich1,3, A.E. Goldyrev3, I.A. Kosheleva1
1Lomonosov Moscow State University, Moscow, Russia
2 Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences, Moscow, Russia
3Geological Institute, Russian Academy of Sciences, Moscow, Russia
4Institute of the Earth’s crust, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia
Keywords: Early Carboniferous volcanism, Southern Urals, East Ural zone, isotope-geochronological studies, rock magnetism, paleomagnetism
Abstract
This paper presents new isotope-geochronological, rock magnetic and paleomagnetic data for the Berezinovsky and Tayandinsky Early Carboniferous volcanic complexes of the East Ural zone of the Southern Urals. The cover nature of the basalts is demonstrated, lava flow patterns and their directions are identified, and the strikes of the subvolcanic bodies are clarified. Using the LA-Q-ICP-MS laser ablation method, an age of 339.0 ± 1.0 Ma was obtained for rhyolites of the Berezinovsky complex. It is shown that by this time, the East Ural zone had already accreted to the East European Platform and formed a single structure with it.
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