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《JOURNAL OF CHANGCHUN UNIVERSITY OF SCIENCE AND TECHNOLOGY》 2000-02
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ISOTOPIC GEOCHEMISTRY TRACING FOR SOURCES OF ORE-FORMING FLUID IN TIANWAN ORE BELT

TENG Yan_guo 1, NI Shi_jun 1, ZHANG Cheng_jiang 1,TANG Jian_wu 1, WU Xiang_yao 1, XU Qi_dong 2 (1.Chengdu University of Technology, Chengdu 610059, China; 2.China University of Geosciences, Wuhan 430074, China)  
The complexity of ore-forming fluid isotopic composition in Tianwan gold ore belt implies that the fluid was multi-source. Hydrogen and oxygen isotopic composition of the fluid inclusion in quartz indicates that the water in ore-forming fluid was derived meanly from mixture water of meteoric and magmatic. Carbon and oxygen isotopic composition (δ 13 C and δ 18 O)shows that the carbon not only derived from depth source but also sedimentary country rock. Obviously, it is a mixture source. δ 34 S value in the gold ore belt changes not too wide, only 0%~10%, which implies the sulfur was derived from a depth source. Lead isotopic composition of Dafagou ore block varies a wide range which means a multi-source too, such as the mixture of depth and shallow lead.
【Fund】: 国家自然科学基金项目!(498730 2 0 );; 国家科技部‘九五’重点科技攻关项目!(96 - 914- 0 3- 0 2 );; 教育部 99年度跨世纪优秀人才?
【CateGory Index】: P597
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