Affiliation: | MO Cehui, LIANG Huaying, WANG Xiuzhang, CHENG Jingping and LI Huimin1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; 2. Tianjin Institute of Geology and Mineral Resources, Chinese Academy of Geological Sciences, Tianjin 300170, China |