Early permian age of nepheline syenites of the Korgere-Daba massif (Sangilen highlands, Tuva)

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Abstract


This paper reports on geochronological U–Pb studies of baddeleyite from nepheline syenite of the Korgere–Daba alkaline massif, which is the largest massif within the Sangilen Highlands (Tyva). The established age of rocks, 295 ± 1 Ma, indicates that, in the Early Permian, undersaturation by silica magmatism occurred in the region in addition to the alkaline-granite magmatism (Ulug–Tanzek, etc.). This age furthermore points to the need to make corrections in the conceptions of a petrophysical type for the Devonian Sangilen complex, which is traditionally distinguished in this region. Until now, the Korgere–Daba massif has been considered in this regard.


About the authors

A. V. Nikiforov

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Author for correspondence.
Email: nikav@igem.ru

Russian Federation, Moscow

E. B. Salnikova

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: nikav@igem.ru

Russian Federation, Saint-Petersburg

V. V. Yarmolyuk

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Email: nikav@igem.ru

Russian Federation, Moscow

academician of the RAS

A. B. Kotov

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: nikav@igem.ru

Russian Federation, Saint-Petersburg

A. M. Sugorakova

Tuvinian Institute for Exploration of Natural Resources of Siberian Branch of the Russian Academy of Sciences

Email: nikav@igem.ru

Russian Federation, Kyzyl

I. V. Anisimova

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: nikav@igem.ru

Russian Federation, Saint-Petersburg

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