Geochemistry of the Caledonian Basic Volcanic Rocks at the SouthMargin of the Qinling Orogenic Belt, and Its Tectonic Implications Dong Yupeng, Zhou Dingwu, Zhang Guowei and Zhu Bingquan 193
Experimental Study on Surface Reactions of Heavy Metal Ions WithQuartz --- Aqueous Ion Concentration Depedence Wu Honghai, Wu Daqing and Peng Jinlian 201
Petrological and Mineralogical Study of Enclaves in Plutons in theTypical Mining Districts of Tongling, Anhui and Its Bearing on theProcess of Magmatism-Metallogeny Du Yangsong 208
A Paleoproterozoic A-type Rhyolite Yu Jinhai and Wang Dezi 219
The Dynamical Model of Chemical Oscillation in CaF2-HCl-H2OSolid-Liquid Reaction System Wu Pingxiao, Wu Jinping, Li Caiwei and Yang Wenhua 229
Diatomaceous Deposits of Fayium, Egypt; Characterization andEvaluation for Industrial Application M.S. Hassan, I.A. Ibrahim andI.S. Ismael 233
Geochemistry of Platinum Group Elements in Mafic-Ultramafic Rocks ofXinjie Intrusion Zhang Chengjiang, Wang Yinliang, Li Xiaolin, Xiu Shuzhi andHuang Yongjiang 242
Geochemical Characteristics and Origin of Tar Mats from the YahaField in Tarim Basin, China Zhang Min and Zhang Jun 250
Characteristic Elemental Compositions of the Yangtze River and YellowRiver Surface Sediments and Their Geological Background Yang Shouye and Li Congxian 258
Carlin-Type Gold Deposits in Qinling and Some Related Problems Zhang Fuxin, Zong Jingtin and Ma Jianqin 266
Fluid Composition and Carbon & Oxygen Isotope Geochemistry ofCenozoic Alkali Basalts in Eastern China Zhang Mingjie, Wang Xianbin, Liu Gang, Wen Qibin and Li Liwu 276
Characteristics of Hydrocarbon Generation from Organic Macerals inJurassic Coal Measures, Xinjiang, China Ding Anna, Hui Rongyao, Meng Qianxiang and Zhang Zhongnin 283
