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Age and composition of zircons from the Devonian Petrivske kimberlite pipe of the Azov domain, the Ukrainian shield
journal contribution
posted on 2023-05-21, 11:07 authored by Shumlyanskyy, L, Vadim Kamenetsky, Borodynya, BResults of a study of U-Pb and Hf isotope systematics and trace element concentrations in five zircon crystals separated from the Devonian Petrivske kimberlite are reported in the paper. Four zircons have yielded Paleoproterozoic and Archean ages, while one zircon grain gave a Devonian age of 383.6 +/- 4.4 Ma (weighted mean Pb-206/U-238 age). The Precambrian zircons have been derived from terrigenous rocks of the Mykolaivka Suite that is cut by kimberlite, or directly from the Precambrian rock complexes that constitute continental crust in the East Azov. The Devonian zircon crystal has the U-Pb age that corresponds to the age of kimber-lite emplacement. It is 14 m.y. younger than zircon megacrysts found in the Novolaspa kimberlite pipe in the same area. In addition, Petrivske zircon is richer in trace elements than its counterparts from the Novolaspa pipe. Petrivske and Novolaspa zircons crystallized from two different proto-kimberlite melts, whereas the process of kimberlite formation was very complex and possibly included several episodes of formation ofpmto-kimberlite melts, separated by extended (over 10 M.y.) periods of time.
History
Publication title
Mineralogical Journal - UkraineVolume
43Issue
4Pagination
50-55ISSN
2519-2396Department/School
School of Natural SciencesPublisher
National Academy of Sciences of UkrainePlace of publication
UkraineRights statement
Copyright 2018 Springer-Verlag GmbH Germany, part of Springer NatureRepository Status
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