1. Earth Physics Department; Faculty of Physics; M.V. Lomonosov Moscow State University; Leninskie Gory 119991 Moscow Russia
2. Ural Federal University; 19 Mira Str. 620002 Ekaterinburg Russia
3. Vernadsky Institute of Geochemistry and Analytical Chemistry; Russian Academy of Sciences; 19 Kosygin Str. 119991 Moscow Russia
4. CEREGE CNRS/Aix-Marseille Université; BP 80 13545 Aix en Provence Cedex 4 France
5. Institute for Rock Magnetism; University of Minnesota; 100 Union Drive SE Minneapolis Minnesota 55455 USA
6. Department of Earth Sciences; University of Minnesota; 310 Pillsbury Drive SE Minneapolis Minnesota 55455 USA
7. Schmidt Institute of Physics of the Earth; Russian Academy of Sciences; B. Gruzinskaya Str. 123995 Moscow Russia
8. Department of Earth; Atmospheric; and Planetary Sciences; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge Massachusetts 02139 USA
9. Institute of Geology of Ore Deposits; Petrography; Mineralogy and Geochemistry; Russian Academy of Sciences; 35 Staromonetny Per. 119017 Moscow Russia