1. College of Earth Sciences, Jilin University, Changchun 130061, China
2. Wuhan Institute of Technology, Wuhan 430074, China
3. Guinea Westfield Mining Company-Sarlu, Jinzhong 031300, China
4. Ganzhongnan Institute of Geology and Mineral Exploration, Nanchang 330002, China
5. Orient Resources Ltd., Richmond, BC, Canada