1. School of Geosciences and Info-Physics, Central South University, Changsha, China
2. College of Surveying and Geo-informatics, North China University of Water Resources and Electric Power, Zhengzhou, China
3. Ministry of Education, Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University), Changsha, China
4. Spacety Co., Ltd, Changsha, China