1. Mineral Exploration Research Centre, Harquail School of Earth Sciences, Laurentian University, Sudbury, Ontario P3E 2C6, Canada
2. Department of Geosciences, Auburn University, Auburn, Alabama 36849, USA
3. Department of Geological Sciences, University of Florida, Gainesville, Florida 32611, USA
4. Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China