Molecular Geochemical Evidence for theOrigin of Natural Gas from Dissolved Hydrocarbon in Ordovician FormationWaters in Central Ordos Basin Li Xianqing; Hou Dujie; Tang Youjun; Hu Guoyi, M. A.; Xiong Bo,M. A. 193
Isotopic Characteristics of Mesozoic Au-Ag Polymetallic Ore Deposits inNorthern Hebei and Their Ore-Forming Materials Source Wang Baode, M. A.; Niu Shuyin, M. A.; Sun Aiqun, M. A.; LiHongyang. 203
[sup40] Ar/[sup39] Ar Ages of Auriferous Quartz Veins from the Fengyangand Zhangbaling Regions and Their Geological Significance Ying Hanlong; Zhao Liqing, M. A. 215
Zircon U/Pb Dating of Cretaceous Adakitic Volcanic Rocks in the EasternPart of North Dabie Mountains Xue Huaimin, M. A.; Dong Shuwen, M. A.; Liu Ziaochun, M. A. 222
Crust-Mantle Interaction in Dabie Orogenic Belt, Central China:Geochemical Evidence from Late Cretaceous Basalts Kuang Shaoping; Zhang Benren. 231
Application of Lead Isotopes to Geochemical Exploration of Gold Depositsin Baoban, Hainan Province, China Chang Xiangyang; Zhu Bingquan; Yu Shoujun, M. A.; Xia Ping. 244
Environmental Geochemistry of Heavy Metal Contaminants in Soil andStream Sediment in Panzhihua Mining and Smelting Area, SouthwesternChina Teng Yanguo; Tuo Xianguo; Ni Shijun; Zhang Chengjiang; XuZhengqi, M. A. 253
Crust-Mantle Structures and Gold Enrichment Mechanism of Mantle FluidSystem Deng Jun; Sun Zhongshi; Wang Qingfei; Wei Yangguang, M. A. 263
Isotopic Tracing of Trophication Processes over the Last Millennia onLake Chenghai Wu Jinglu; Wang Sumin; Xia Weilan, M. A. 271
Geology, Geochemistry and Genesis of the Hongshijing Gold Deposit inRuoqiang, Xinjiang Xiao Huiliang; Zhou Jiyuan; Wang Henian, M. A.; Cui Bingfang, M.A.; Chen Shizhong. 280
