作者单位:An Yanfei(School of Resources and Environmental Engineering,Anhui University,Hefei,230601,China;Key Lab.of Geological Process and Mineral Resource Survey of Guangdong Province,Guangzhou,510275,China)Li Xingyuan,Zhou Yongzhang(Key Lab.of Geological Process and Mineral Resource Survey of Guangdong Province,Guangzhou,510275,China;Department of Earth Science,Sun Yat-Sen University,Guangzhou,510275,China)