Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring(Ministry of Education) Changsha 410083 China;
School of Geosciences and Info-Physics Central South University Changsha 410083 China;
MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral Resources CAGS Beijing 100037;
School of Earth and Space Sciences Peking University Beijing 100871 China;