1. Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China
2. Nanjing Institute of Geology and Palaeontology Chinese Academy of Science Nanjing 210008 China
3. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, School of Geosciences and Info‐Physics Central South University Changsha 410083 China