1. Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, Ministry of Land and Resources, Xi’an Center of China Geological Survey, Xi’an 710054, P.R. China
2. No. 5 Geological and Mineral Survey Institute, Qinghai Bureau of Geology and Mineral Resources, Xining 810000, P.R. China
3. Institute of Mineral Resources Research, China Metallurgical Geology Bureau, Beijing 100025, P.R. China