Xu Zhiqin,Xu Huifen,Zhang Jianxin,Li Haibing,Zhu Zhizhi,Qu Jingchuan,Institute of Geology,Chinese Academy of Geological Sciences,BeijingChen Daizhang,Chen Jinlu,China University of Geosciences,Beijingand Yang KaichunNo. 2 Q ilian Geological Party,Bureau of Geology and Mineral Resources of Q inghai Province,Q ilian County,Q inghai
Qiao Xiufu,Song Tianrui,Gao Linzhi,Peng Yang,Li Haibing,Gao Mai,Song Biao and Zhang QiaodaInstitute of Geology,Chinese Academy of Geological Sciences,Beijing
Gong Zizhen,Li Zhaolin,Zhang Zhigan,Institute of Karst Geology,Ministry of Geology and Mineral Resources,Guilin,GuangxiFu Liqun and Zuo Baolin The First Hydrogeological Party,Ministry of Coal Industry,Handan,Hebei
