1. Institute of the Earth’s Crust, Russian Academy of Sciences, Siberian Branch, Irkutsk, Russia
2. Geological Institute, Russian Academy of Sciences, Moscow, Russia
3. Laboratoire Géosciences Rennes, CNRS-UMR6118, Université de Rennes, Rennes, France
4. Geological Institute, Russian Academy of Sciences, Siberian Branch, Ulan-Ude, Russia