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Distribution and Geochemical Features of Hercynian-IndosinianGranitotids in Southeastern China Wang Dezi and Liu Changshi 234
A Preliminary Study on the Geochemical Characteristics of theCoal-type Gas in the Zhongyuan (Central China)--Huabei (North China)Oil--gas Area Xu Yongchang and Shen Ping 247
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A Study of 234U/238U Ratios in Groundwaters of TaiyuanArea, Shanxi Province Lin Ruifen et al. 264
Thermodynamic Analysis of Ore-forming Conditions and SulfurIsotopic Systematics of Dachang Ore Field Zhang Zheru et al. 273
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