1. School of Geosciences and Info Physics, Central South University, Changsha, China
2. College of Geographic Science, Hunan Normal University, Changsha, China
3. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, and the Hunan Geological Disaster Monitoring, Early Warning and Emergency Rescue Engineering Technology Research Center, and the School of Geosciences and Info Physics, Central South University, Changsha, China