1. State Key Laboratory of Geological Processes and Mineral Resources, Faculty of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
2. Beijing Institute of Geology for Mineral Resources Co., Ltd., Beijing 100012, China
3. Center for Russian and Central Eurasian Mineral Studies, Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW75BD, UK
4. Department of Earth Sciences, University of Windsor, Windsor, ON N9B 3P4, Canada