| Isotopic Compositions of Sulfur in the Jinshachang Lead-Zinc Deposit Yunnan, China, and its Implication on the Formation of Sulfur-Bearing Minerals | |
Bai Junhao; Huang Zhilong ; Zhu Dan; Yan Zaifei; Zhou Jiaxi
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| 2013 | |
| 发表期刊 | Acta Geologica Sinica
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| 卷号 | 87期号:5页码:1355-1369 |
| 摘要 | The Jinshachang lead-zinc deposit is mainly hosted in the Upper Neoproterozoic carbonate rocks of the Dengying Group and located in the Sichuan-Yunnan-Guizhou (SYG) Pb-Zn-Ag multi-metal mineralization area in China. Sulfides minerals including sphalerite, galena and pyrite postdate or coprecipitate with gangue mainly consisting of fluorite, quartz, and barite, making this deposit distinct from most lead-zinc deposits in the SYG. This deposit is controlled by tectonic structures, and most mineralization is located along or near faults zones. Emeishan basalts near the ore district might have contributed to the formation of orebodies. The S-34 values of sphalerite, galena, pyrite and barite were estimated to be 3.6 parts per thousand-13.4 parts per thousand, 3.7 parts per thousand-9.0 parts per thousand, -6.4 parts per thousand to 29.2 parts per thousand and 32.1 parts per thousand-34.7 parts per thousand, respectively. In view of the similar S-34 values of barite and sulfates being from the Cambrian strata, the sulfur of barite was likely derived from the Cambrian strata. The homogenization temperatures (T approximate to 134-383 degrees C) of fluid inclusions were not suitable for reducing bacteria, therefore, the bacterial sulfate reduction could not have been an efficient path to generate reduced sulfur in this district. Although thermochemical sulfate reduction process had contributed to the production of reduced sulfur, it was not the main mechanism. Considering other aspects, it can be suggested that sulfur of sulfides should have been derived from magmatic activities. The S-34 values of sphalerite were found to be higher than those of coexisting galena. The equilibrium temperatures calculated by using the sulfur isotopic composition of mineral pairs matched well with the homogenization temperature of fluid inclusions, suggesting that the sulfur isotopic composition in ore-forming fluids had reached a partial equilibrium. |
| 关键词 | Sulfur Isotopic Composition Thermochemical Sulfate Reduction Homogenization Temperature Equilibrium Temperature Jinshachang Lead-zinc Deposit |
| 学科领域 | 矿床地球化学 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.gyig.ac.cn/handle/352002/5022 |
| 专题 | 矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文 矿床地球化学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Bai Junhao,Huang Zhilong,Zhu Dan,et al. Isotopic Compositions of Sulfur in the Jinshachang Lead-Zinc Deposit Yunnan, China, and its Implication on the Formation of Sulfur-Bearing Minerals[J]. Acta Geologica Sinica,2013,87(5):1355-1369. |
| APA | Bai Junhao,Huang Zhilong,Zhu Dan,Yan Zaifei,&Zhou Jiaxi.(2013).Isotopic Compositions of Sulfur in the Jinshachang Lead-Zinc Deposit Yunnan, China, and its Implication on the Formation of Sulfur-Bearing Minerals.Acta Geologica Sinica,87(5),1355-1369. |
| MLA | Bai Junhao,et al."Isotopic Compositions of Sulfur in the Jinshachang Lead-Zinc Deposit Yunnan, China, and its Implication on the Formation of Sulfur-Bearing Minerals".Acta Geologica Sinica 87.5(2013):1355-1369. |
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