U-Pb (ID-TIMS) Age of Garnet from Aifflkites of the Kola Alkali Province

摘要

The U-Pb (ID-TIMS) geochronologieal studies of garnet from aillikites of the Kandalaksha dike swarm (Kola alkali province) were carried out. The estimated U-Pb age of garnet (374 ± 3 Ma) coincides with the major stage (373-377 Ma) of alkali magmatism in the Kola Province (LIP). Hence, it can be concluded that rocks of the dike complex of Kandalaksha Bay and foidolite-range rocks of alkali-ultrabasic massifs of this province were formed synchronously.