1. Department of Geological Engineering, Qinghai University, Xining 810016, China
2. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, 810008 Xining, China
3. Key Laboratory of Salt Lake Geology and Environment of Qinghai Province, Qinghai Institute of Salt Lakes, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, 810008 Xining, China
4. University of Chinese Academy of Sciences, 100049 Beijing, China