Mineralogical-geochemical features of zircon from the Kumir granitic stock, Gorny Altai
A.I. Gusev
| UDK 549.2/.8:548 | https://doi.org/10.35597/2313-545X-2022-8-2-4 | Read PDF (RUS) |
Data on U-Pb age and composition of zircon from the Kumir granitic stock (Gorny Altai) and related greisens are presented. The magmatic, metamictic and pneumatolytic-hydrothermal zircons exhibit specifc changes in main and trace elements with increasing content of high-feld strength elemetns (U, Nb, Sc, REE) and decreasing of Eu/Eu* and Ce/Ce* ratios. Depending on the composition and activity of volatiles in fuids and O fugacity, the REE contents and their ratios varied that is refected on tetrad effect of REE fractionation of М- and W- types.
Keywords: zircon, high-feld strength elements, U, Nb, Sc, REE, tetrad effect of REE fractionation.
Received 14.01.2022, accepted 10.04.2022
A.I. Gusev, Shukshin Altai State University for Humanities and Pedagogy, Biysk, Altay krai, 659333 Russia; anzerg@mail.ru
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MINERALOGY 2 2022