1. State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing People's Republic of China
2. School of Earth Sciences and Resources China University of Geosciences (Beijing) Beijing People's Republic of China
3. No. 4 of Geology and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources Jiuquan People's Republic of China
4. Geology Department University of the Free Sate Bloemfontein South Africa
5. Department of Hydrogeology and Engineering Geology Gansu Provincial Bureau of Geology and Mineral Resources Zhangye People's Republic of China