Xing Fengming,Xu Xiang,Chen Jiangfeng,Zhou Taixi,K.A. Foland Institute of Geological Sciences of Anhui Province,Hefei,230001 Department of Earth and Space Sciences,University of Science and Technol ogy of China,Hefei,230026 Department of Geology and Mineralogy. the Ohio State University,Columbus,OH 43210,USA Jiang Minxi
Liu Junying,Chen Zhongliang Institute of Geology,Chinese Academy of Geological Sciences,Beijing Panxi Geological Party,Sichuan Bureau of Geology and Mineral Resources,Xichang Liu Linqun
Li Peiying,Cheng Zhenbo,Lu Houyuan,Liu Guohai First Institute of Oceanography,SOA,Qingdao,Shandong Liaoning Teachers University,Dalian,Liaoning Liu Linqun