Geochronology of Alkaline Rocks of the Aryskan Rare Metal Deposit, East Sayan

The temporal relations between alkaline rocks of the Aryskan rare metal (Y, REEs, Nb, Ta) deposit are determined using metamict zircon with high U and Th contents, which was prepared for geochronological U–Pb (ID TIMS) studies following a special procedure. Dating of this zircon from alkali granites...

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Published inDoklady earth sciences Vol. 507; no. Suppl 3; pp. S382 - S389
Main Authors Nikiforov, A. V., Ivanova, A. A., Yarmolyuk, V. V., Salnikova, E. B., Kotov, A. B., Kozlovsky, A. M., Khertek, A. K., Plotkina, Yu. V., Kudryashova, E. A., Galankina, O. L., Polyakov, N. A.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2022
Springer
Springer Nature B.V
Subjects
Earth and Environmental Science
Earth Sciences
Feldspars
Geochronology
Geochronometry
Geology of Ore Deposits
Granite
Heavy metals
Igneous rocks
Ore deposits
Plutons
Rocks
Yttrium
Zircon
metamict zircon
Aryskan
rare metal granites
U–Pb ID TIMS
East Sayan
rare metal deposits
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Summary:The temporal relations between alkaline rocks of the Aryskan rare metal (Y, REEs, Nb, Ta) deposit are determined using metamict zircon with high U and Th contents, which was prepared for geochronological U–Pb (ID TIMS) studies following a special procedure. Dating of this zircon from alkali granites of the Aryskan and neighboring Astyg plutons showed that they formed synchronously: 448 ± 1 and 446 ± 1 Ma, respectively. The suggested genetic link of alkali granites with country alkali feldspar syenites formed at 472 ± 2 Ma (zircon, U–Pb, ID TIMS) is not confirmed.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X22700490