Affiliation: | SUN XIAO-MING XU KE-QIN REN QI-JIANG REID R. KEAYS(Institute of East China Nonferrous Metals, Geological Exploration Bureau, Nanjing 210007, PRC) Department of Earth Sciences, Nanjing University, Nanjing 210008, PRC. Department of Geology, Melbourne University, Melbourne, Parkville, Victoria, 3052, Australia |