Institution: | ZHANG Haihua~1, XIA Yu~1, WANG Zuwei~2 and ZHOU Yongzhang~3 1. Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, China; 2. Department of Geography, Tianjin Normal University, Tianjin 300071, China; 3. Department of Earth Sciences, Zhongshan University, Guangzhou 510275, China |