1. Central South University, School of Geoscience and Info-physics, Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Changsha, China and University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China.
2. Central South University, School of Geoscience and Info-physics, Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Changsha, China. (corresponding author)
3. University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China. (corresponding author)
4. Central South University, School of Geoscience and Info-physics, Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Changsha, China.
5. Chinese Academy of Geological Sciences, SinoProbe Laboratory, Beijing, China.
6. Hebei GEO University, School of Earth Sciences, Shijiazhuang, China.