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Zirconology of pyroxenites from the Kiryabinka pyroxenite-gabbro complex (Southern Urals) |
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| Authors: | A A Krasnobaev V N Puchkov N D Sergeeva E N Lepekhina |
| Institution: | 1. Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia 4. Bashkirian State University, Ufa, Russia 2. Institute of Geology, Ufa Science Center, Russian Academy of Sciences, Ufa, Russia 3. Karpinskii All-Russia Research Institute of Geology, St. Petersburg, Russia |
| Abstract: | In this study we discuss the problem of dating the Kiryabinka complex. The data collected on zircons from pyroxenites of the Kiryabinka polyphase pyroxenite-gabbro complex can help address a number of controversial issues regarding the Precambrian geology of the Southern Urals. First, the age of the complex (T = 680 ± 3.4 Ma) can be assigned within the late Riphean (RF4, Arshinian) or the middle Neoproterozoic (Cryogenian). The available zircon dates from gabbroic and granitoid rocks in the western flank of the Southern Urals (Berdyaush, Akhmer, and Barangul massifs) are supplemented with a new age of ultramafic rocks, the differentiates of a basaltic magma, which further corroborate the conclusion about the Upper Riphean age of the country rocks. |
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