1. School of Earth Resources, China University of Geosciences, Wuhan, China
2. Chinese Academy of Sciences, Guangzhou Institute of Geochemistry, Guangzhou, China
3. Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
4. Economic Geology Research Institute (EGRU), College of Science and Engineering, James Cook University, Townsville, QLD, Australia
5. Department of Geology, University of Johannesburg, Johannesburg, South Africa
6. Electronic Information School, Wuhan University, Wuhan, China
7. Qinghai Bureau of Environmental Geology Exploration, Department of Natural Resources of Qinghai Province, Xining, China