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| Sulfur and lead isotope geochemistry of the DulongSn-Zn polymetallicore deposit, Yunnan province, China |
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| DOI：10.3969/j.issn.1671-4172.2019.06.008 |
| KeyWord:S isotope; Pb isotope; ore-forming material; ore genesis; Dulong Sn-Zn deposit |
| Author | Institution |
| CHENG Yongsheng1, 2, 3 |
1. 有色金属成矿预测与地质环境监测教育部重点实验室（中南大学），长沙 ;2. 有色资源与地质灾害探查湖南省重点实验室，长沙 ;3. 中南大学地球科学与信息物理学院，长沙 ） |
| SUN Wumeng1, 2, 3 |
1. 有色金属成矿预测与地质环境监测教育部重点实验室（中南大学），长沙 ;2. 有色资源与地质灾害探查湖南省重点实验室，长沙 ;3. 中南大学地球科学与信息物理学院，长沙 ） |
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| Abstract: |
| Exploring the ore-forming material sources of the Dulong Sn-Zn polymetallic deposit, Yunnan province, and analyzing the tectonic environment and deep geodynamic background, can help reveal the metallogenic mechanism and its formation mechanism of the ore deposit. Based on the study of sulfur-lead isotope composition and their geochemical characteristics, resultsindicatedthe δ34SCDT values of sulfur isotopevaried from -1.27‰ to 2.92‰, mainly positive values, with the maximum range of 4.19‰ and the average value of 0.87‰. The ratios of 206Pb/204Pb ranged from 17.573 to 18.574, with the maximum range of1.001 and the average value of 18.267. The ratios of 207Pb/204Pb ranged from15.526 to 15.746, with the maximum range of 0.22 and the average value of 15.677.The ratios of 208Pb/204Pb ranged from 38.077 to 39.158,with the maximum range of 1.081 and the average value of 38.81. The values of ω, μ and Th/U ranged from 38.87 to 41.09, 9.43 to 9.74, and 3.91 to 4.13, respectively. The sulfur source of the Dulong deposit was mainly characterized by the magma sulfur, yet the lead sources are multi-origin, which mainly originated from the lower crust; in addition, the orogenic belt lead also had a little contribution. The Dulong Sn-Zn ore deposit was mainly formed in the lower crustal tectonic environment. |
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