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《Acta Geologica Sinica》 2000-02
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Study on Rb-Sr Isotopic Ages of Gold Deposits in West Junggar Area, Xinjiang

Li Huaqin, Chen Fuwen, Cai Hong Yichang Institute of Geology and Mineral Resources,Bureau of Geological Survey of China,Yichang,443003  
As one of the most important gold mineralization provinces, in Xinjiang, the West Junggar region is rich in gold resources with more than 10 deposits of different scales and hundreds of mineralized occurrences. Veined,stockwork and alteration-sheathed gold ores have been found in the area, belonging to four genetic types: the volcanic hydrothermal ores related to early-middle Carboniferous volcanism; subvolcanic hydrothermal ores related to intermediate-acidic porphyry intrusions; hydrothermal ores to the granitic intrusion and dynamo- hydrothermal ores related to regional dynamic metamorphism along the faults . Study of isotopic geochronology of mineralization and correlative geological events shows that these gold deposits were formed in a post-collision tectonic environment and four mineralization stages can be distinguished: the early Carbonif-erous(340Ma±) ,middle Carboniferous ( 310Ma± ), late Carboniferous (290Ma±) and early Per-mian(270Ma±).
【Fund】: 国家305项目(编号96-915-07-05B);; 国家自然科学基金(编号49633250)
【CateGory Index】: P618.51
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