K--Ar Geochronology and Evolution of Genozoic Volcanic Rocks inEastern China Wang Huifen et al. 1
Effects of Biodegradation on Crude Oils from Karamay Oilfield YangBin and Yang Jianqiang 15
Lead Isotopic Compositions of Feldspars and Ores and TheirGeologic Significance Zhang Ligang 25
Geochemistry and Petrology of Emeishan Basalts and SubcontinentalMantle Evolution in Southwestern China Wang Yunliang et al. 37
Geochemical Behavior of Manganese in Weathering Environments andIts Significance in Exploration Zhu Zhaoqi 54
Geochronology of and Nd--Sr--Pb Isotopic Evidence for Mantle Sourcein the Ancient Subduction Zone beneath Sanshui Basin, GuangdongProvince, China Zhu Bingquan et al. 65
REE Geochemistry of Precambrian Metamorphic Rocks in wutaishanRegion Wu Suzhen 72
Experimental Studies of the Solubility of Cassiterite and theExtraction of Tin from Granitic Melts Li Tongjin 84
