Tang Kedong,Shenyang Institute of Geology and Mineral Resources,Shenyang,Liaoning ProvinceWang Ying,Bureau of Geology and Mineral Resources of Heilongjiang Province,Harbin,HeilingjiangHe Guoqi and Shao Ji''''an Peking U niversity,Beijing Liu Xinzhu
Li Jiuling,Feng Daming,Qi Feng and Zhang Guilan Institute of Mineral Deposits,Chinese Academy of Geological Sciences,Beijing Beijing U niversity of Science and Engineering,Beijing Fei Zhenbi
Li Baosheng,Dong Guangrong,Zhang Jiasheng,Li Sen,Jin Heling,Chen Huizhong,Wen Xiangle,Wang Yao,Lanzhou Desert Research Institute,Chinese Academy of Sciences,Lamhou,Gansuand Zhu YizhiXi''''an Open Laboratory of Loess and Quaternary Geology,Chinese Academy of Sciences,Xi''''an,Gansu Fei Zhenbi
Shen Guanglong,Wu Xiuyuan,Wang Jun and Liu Huaqin Department of Geology,Northwest U niversity,Xi''''an,Shaanxi Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing,Jiangsu
