1. Czech Geological Survey Prague, Czech Republic
2. Mineral Resources and Petroleum Authority of Mongolia, Ulaanbaatar, Mongolia
3. Institute of Petrology and Structural Geology, Charles University Prague, Czech Republic
4. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Acdamey of Sciences, Guangzhou, People’s Republic of China
5. Mongolian Academy of Sciences, Institute of Geology, Ulaanbaatar, Mongolia