Abstract

Baddeleyite is a significant mineral successfully applied in the U-Pb geochronology for the precise dating of mafic rocks from layered intrusions with the platinum group element PGE and Cu-Ni mineralization The Fennoscandian Shield hosts several layered Pt-Pd Co-Cr-Ni and Ti-V occurrences in the Northern Karelian and Southern Karelian-Finnish belts The aim of this study is to estimate the content and distribution of rare earth elements REE in baddeleyite and to calculate temperatures of the U-Pb system closure and baddeleyite crystallization compared to zircon from Cu-Ni and Pt-Pd deposits in the north-eastern Fennoscandian Shield For the first time baddeleyite crystals from Cu-Ni Monchepluton and Pt-Pd Monchetundra reefs of the Monchegorsk ore area have been studied in situ by the laser ablation inductively coupled plasma mass spectrometry LA-ICP-MS to measure the U-Pb age of formation and the REE content