1. St. Petersburg State University, Institute of Earth Sciences, St. Petersburg, Russia
2. Diamond and Precious Metal Geology Institute, Siberian Branch, Russian Academy of Sciences, Lenina, Russia
3. Geological Institute, Russian Academy of Sciences, Moscow, Russia
4. Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia
5. Polar Marine Geosurvey Expedition, St. Petersburg, Russia
6. Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Science, Moscow, Russia
7. Department of geology and geophysics, Novosibirsk State University, Novosibirsk, Russia