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Strontium isotope geochemistry of the Lemachang independent silver ore deposit, northeastern Yunnan, China
Hailin Deng;  Chaoyang Li;  Guangzhi Tu;  Yunman Zhou;  Chongwu Wang
2000
Source PublicationScience in China Series D: Earth Sciences
Volume43Issue:4Pages:337-346
Abstract

Sr isotope geochemical studies (the87Sr/86Sr and δ18O-87Sr/86Sr systems) on the wall rocks and ores from the Lemachang independent Ag deposit in northeastern Yunnan provide strong evidence that the ore-forming fluids had flown through radiogenetically Sr-enriched rocks or strata prior to their entry into the locus of ore precipitation, and water-rock interaction is the main mechanism of Ag ore precipitation. The radiogenetically Sr-enriched source region may be the Proterozoic basement (the Kunyang and Hekou groups). Moreover, the theoretical modeling of the Sr isotopic system indicates that the ore-forming fluids contain as much as 3×10-6 Sr with isotopic composition of Sr being 0.750 and that of oxygen 7.0‰ The ore-forming temperatures were estimated at 150–250°C for the carbonate rock-type ores and at 200–260°C for the clastic rock-type.

KeywordLemachang, Northeastern Yunnan, Independent Ag Deposit, Sr Isotope, Ore-forming Fluid
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8327
Collection矿床地球化学国家重点实验室
Affiliation1.The Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences,
2.Geological Party of the Yunnan Bureau of Geology and Mineral Resources, Xundian 655205, China
Recommended Citation
GB/T 7714
Hailin Deng;Chaoyang Li;Guangzhi Tu;Yunman Zhou;Chongwu Wang. Strontium isotope geochemistry of the Lemachang independent silver ore deposit, northeastern Yunnan, China[J]. Science in China Series D: Earth Sciences,2000,43(4):337-346.
APA Hailin Deng;Chaoyang Li;Guangzhi Tu;Yunman Zhou;Chongwu Wang.(2000).Strontium isotope geochemistry of the Lemachang independent silver ore deposit, northeastern Yunnan, China.Science in China Series D: Earth Sciences,43(4),337-346.
MLA Hailin Deng;Chaoyang Li;Guangzhi Tu;Yunman Zhou;Chongwu Wang."Strontium isotope geochemistry of the Lemachang independent silver ore deposit, northeastern Yunnan, China".Science in China Series D: Earth Sciences 43.4(2000):337-346.
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