Geochemistry of alkali syenites from the Budun massif and their petrogenetic properties (Ol’khon Island)


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The first data on the geochemistry of the alkali syenite massif in Cape Budun of Ol’khon Island, where it makes contact in the south with the Khuzir gabbroid massif, are presented. Syenites occur among granite gneisses of the Sharanur dome and, like its granites, are enriched with Zr and REEs, but depleted in other trace elements. They contain anorthoclase, corundum, rare nepheline, zircon, and hercynite and are accompanied by desilicified pegmatites. Their unusual geochemical properties allow the assumption that alkaline magmas resulted from the interaction between basic and granitoid melts.

Sobre autores

V. Makrygina

Vinogradov Institute of Geochemistry, Siberian Branch

Autor responsável pela correspondência
Email: vmakr@igc.irk.ru
Rússia, ul. Favorskogo 1a, Irkutsk, 664033

L. Suvorova

Vinogradov Institute of Geochemistry, Siberian Branch

Email: vmakr@igc.irk.ru
Rússia, ul. Favorskogo 1a, Irkutsk, 664033

O. Zarubina

Vinogradov Institute of Geochemistry, Siberian Branch

Email: vmakr@igc.irk.ru
Rússia, ul. Favorskogo 1a, Irkutsk, 664033

N. Bryanskii

Vinogradov Institute of Geochemistry, Siberian Branch

Email: vmakr@igc.irk.ru
Rússia, ul. Favorskogo 1a, Irkutsk, 664033

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