1. Sirorkin, Polar Marine Geological Expedition, ul. Pobedy 24, 189510 Lomonosov, St. Petersburg, Rusia;
2. Norsk Polarinstitutt, P. 0. Box 5072 Mujorstua, N-0301 Oslo, Norway;
3. Geological Institute, Kola Science Centre of Academy of Sciences, ul. Fersman 14. 184200 Apatity, Russia.