THE AGE OF METAMORPHISM OF SILLIMANITE-BEARING SCHISTS AT THE KYAKHTINSKOE DEPOSIT ( southwestern Transbaikalia )
I.A. Izbrodina, G.S. Rippa, A.G. Doroshkevicha, S.A. Sergeevb, D.I. Matukovb, and V.F. Posokhova
aGeological Institute, Siberian Branch of the Russian Academy of Sciences, 6a ul. Sakh'yanovoi, Ulan Ude, 670047, Russia
bCenter of Isotopic Research, A.P. Karpinsky Russian Geological Research Institute, 74 Srednii prosp., St. Petersburg, 199106, Russia
Keywords: Sillimanite schists, zircon, U-Pb (SHRIMP-II), geochronology, Late Mesozoic, southwestern Transbaikalia
Pages: 186-189
Abstract
Results of U-Pb (SHRIMP-II) and Rb-Sr dating of sillimanite schists in southwestern Transbaikalia are presented, which testify to high-temperature metamorphism in the Late Mesozoic. The metamorphism might have been related to the formation of metamorphic cores or tectonoplutonic activity accompanied by the formation of rift structures in Transbaikalia and Mongolia.
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