State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China;
Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education China University of Geosciences Beijin;
School of Mathematics and Information Science Guangzhou University Guangzhou Guangdong 510405 China;
metallogenie elements; skarn; mnltifractal spectrum; Tongling; Anhui; China;