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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Isotopic composition and source of lead in the Jinding Zn-Pb Deposit, Yunnan, China
verfasst von : Zeng Rong, Zhao Shihua, Gao Yongbao, Li Yongqiang
Erschienen in: Mineral Deposit Research: Meeting the Global Challenge
Verlag: Springer Berlin Heidelberg
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The Jinding Zn-Pb deposit is the largest Zn-Pb deposit so far discovered in China. To study the source of the mineralizing materials, we analyzed its lead isotopes. We found that the isotopic composition of lead in coarse-grained and fine-grained galenite crystals are very different. The ratio of lead isotopes in fine-grained galenite is higher, and lead isotopes are distributed over the lead development curve of the orogenic belt which is located in the range of upper crustal lead. All these indicate that the lead of fine-grained galenite comes mainly from stratigraphy. In contrast, the ratio of lead isotopes in coarse-grained galenite is lower and lead isotopes are distributed beneath the lead development curve of the orogenic belt, as well as in the upper mantle and lower crust.