Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 47035 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ The Neoproterozoic and Early Paleozoic geological history of the Ural-Kazakhstan margin of the Paleoasian Ocean using new isotopic and geochronological data obtained for the Polar Ural region The Neoproterozoic and Early Paleozoic geological history of the Ural-Kazakhstan margin of the Paleoasian Ocean using new isotopic and geochronological data obtained for the Polar Ural region Khain E V Khain E V Fedotova A A Fedotova A A Bibikova E V Bibikova E V Salnikova E B Salnikova E B Kotov A B Kotov A B Burgat K -P Burgat K -P Kovach V P Kovach V P Remizov D N Remizov D N Geological Institute, Russian Academy of Sciences, Moscow, Russia ru Geological Institute, Russian Academy of Sciences, Moscow, Russia ru Geological Institute, Russian Academy of Sciences, Moscow, Russia ru Geological Institute, Russian Academy of Sciences, Moscow, Russia ru Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia ru Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia ru Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, Sankt-Petersburg, Russia ru Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, Sankt-Petersburg, Russia ru Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, Sankt-Petersburg, Russia ru Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, Sankt-Petersburg, Russia ru Federal Department of Geoscience and Natural Resources, Hannover, Germany ru Federal Department of Geoscience and Natural Resources, Hannover, Germany ru Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, Sankt-Petersburg, Russia ru Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, Sankt-Petersburg, Russia ru Institute of Geology, Komi Research Center, Ural Division of the Russian Academy, Syktyvkar, Russia ru Institute of Geology, Komi Research Center, Ural Division of the Russian Academy, Syktyvkar, Russia ru 7 5 1 13 10 11 2021 https://rjes.ru/en/nauka/article/47035/view

The presence of pre-Paleozoic ophiolites in the Polar Ural region has been a matter of debate for a long time. In order to solve this problem rock samples were collected from the Enganepe Ridge and the Kharbei metamorphic rock complex to carry out their isotope and geochemical study. The U-Pb method was used to study the zircons from the plagiogranites of the ophiolite rocks from the Enganepe Ridge and from the granite and granite gneiss samples collected from the Kharbei complex. The Enganepe plagiogranite samples showed the concordant age values of 670 5 million years. The data obtained for the Kharbei metamorphosed volcanic and sedimentary rocks suggest that some of them had accumulated in pre-Vendian time about 640nbsp;Ma and were metamorphozed at 460 10 million years. These data suggest the same scenario for the evolution of the Paleoasian ocean, including its Ural margin, and the margins of the Paleoatlantic Ocean.

The presence of pre-Paleozoic ophiolites in the Polar Ural region has been a matter of debate for a long time. In order to solve this problem rock samples were collected from the Enganepe Ridge and the Kharbei metamorphic rock complex to carry out their isotope and geochemical study. The U-Pb method was used to study the zircons from the plagiogranites of the ophiolite rocks from the Enganepe Ridge and from the granite and granite gneiss samples collected from the Kharbei complex. The Enganepe plagiogranite samples showed the concordant age values of 670 5 million years. The data obtained for the Kharbei metamorphosed volcanic and sedimentary rocks suggest that some of them had accumulated in pre-Vendian time about 640nbsp;Ma and were metamorphozed at 460 10 million years. These data suggest the same scenario for the evolution of the Paleoasian ocean, including its Ural margin, and the margins of the Paleoatlantic Ocean.

 ophiolite plagiogranite isotopic geochronological studies Polar Ural granite gneiss. ophiolite plagiogranite isotopic geochronological studies Polar Ural granite gneiss.

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