Zirconology of pegmatites of the Ilmeny Mountains

Zirconology of pegmatites of the Ilmeny Mountains

Zircons extracted from the nepheline and feldspar crystals of miaskitic and feldspar pegmatites, respectively, are analyzed with the SHRIMP method for the first time. The early (Silurian) zircons coincide in age (432 Ma), composition, and mineralogical peculiarities with early zircons from miaskites...

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Bibliographic Details
Published in:Doklady earth sciences Vol. 457; no. 2; pp. 960 - 964
Main Authors: Krasnobaev, A. A., Valizer, P. M., Anfilogov, V. N., Nemov, A. B., Busharina, S. V.
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-08-2014
Springer
Springer Nature B.V
Subjects:
Crystallography
Crystals
Earth and Environmental Science
Earth Sciences
Geochemistry
Magnetite
Mineralogical research
Mineralogy
Mountains
Permian
Plagioclase
Silurian
Zirconium
DOKLADY Earth Science
206Pb
Zircon
Ilmenite
Nepheline
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Summary:Zircons extracted from the nepheline and feldspar crystals of miaskitic and feldspar pegmatites, respectively, are analyzed with the SHRIMP method for the first time. The early (Silurian) zircons coincide in age (432 Ma), composition, and mineralogical peculiarities with early zircons from miaskites. It is concluded that the pegmatite melt is a derivative of the miaskite melt. Permian (240–260 Ma) metamorphic zircons are widespread in pegmatites and miaskites. Zircons from these rocks are characterized by genetic commonality.
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ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X14080066