Institution: | 1. Department of Geosciences, University of Oslo, Oslo, Norway 2. Geological Institute, Kola Research Centre of the Russian Academy of Sciences, Apatity, 184200, Russia 3. Institute of Geology, Karelian Research Centre of the Russian Academy of Sciences, Petrozavodsk, 185910, Republic of Karelia, Russia 4. St. Petersburg State University, 7-9, Universitetskaya nab., St. Petersburg, 199034, Russia
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