1. Geological Institute of the Kola Science Centre, Russian Academy of Sciences, Apatity, Russia
2. Apatity Branch, Murmansk State Technical University, Apatity, Russia
3. Geological Institute, Russian Academy of Sciences, Moscow, Russia
4. Institute of Geology of the Karelian Research Centre, Russian Academy of Sciences, Petrozavodsk, Russia
5. Mining and Geological Faculty, Petrozavodsk State University, Petrozavodsk, Russia
6. Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, Saint Petersburg, Russia