1. International Mining Research Center China Geological Survey Beijing 100037 China
2. China Mining News China Geological Survey Beijing 100037 China
3. Institute of Advanced Studies China University of Geosciences Wuhan 430074 China
4. MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China
5. Department of Geology University of the Free State Bloemfontein South Africa
6. School of Earth Sciences and Resources China University of Geosciences Beijing 100083 China