Sources and Thermo-Chemical Sulfate Reduction for Reduced Sulfur in the Hydrothermal Fluids, Southeastern SYG Pb-Zn Metallogenic Province, SW China

	Sources and Thermo-Chemical Sulfate Reduction for Reduced Sulfur in the Hydrothermal Fluids, Southeastern SYG Pb-Zn Metallogenic Province, SW China
	Zhou Jiaxi; Huang Zhilong; Bao Guangping; Gao Jianguo
	2013
发表期刊	Journal of Earth Science
卷号	24 期号:5 页码:759-771
摘要	Located on the western Yangtze Block, the Sichuan ()-Yunnan (M)-Guizhou (SYG) Pb-Zn metallogenic province has been a major source of base metals for China. In the southeastern SYG province, structures are well developed and strictly control about 100 Pb-Zn deposits. Almost all the deposits are hosted in Devonian to Permian carbonate rocks. Lead-zinc ores occur either as veinlets or disseminations in dolomitic rocks with massive and disseminated textures. Ore minerals are composed of pyrite, sphalerite and galena, and gangue minerals are calcite and dolomite. Sulfide minerals from four typical Pb-Zn deposits are analyzed for sulfur isotope compositions to trace the origin and evolution of hydrothermal fluids. The results show that delta S-34 values of sulfide minerals range from +3.50%0 to +20.26%0, with a broad peak in +10%0 to +16%0, unlike mantle-derived sulfur (0 +/- 3%0). However, the mean delta S-34 sulfide and delta(83)Ssfluids values are similar to that of sulfate-bearing evaporites in the host rocks (gypsum: similar to+15%0 and barite: +22%0 to +28%0) and Cambrian to Permian seawater sulfate (+15%0 to +35%0). This suggests that reduced sulfur in hydrothermal fluids was likely derived from evaporates in the host rocks by thermo-chemical sulfate reduction (TSR). Calculated delta S-34 Sigma S-fluid, values of the Shanshulin (), Qingshan (*LW, Shaojiwan (ffX/4) and Tianqiao () Pb-Zn deposits are +21.59%0, +18.33%0, +11.43%0 and +10.62%0, respectively, indicating sulfur-bearing hydrothermal fluids may be evolved from the Shanshulin to Qingshan and then the Shaojiwan to Tianqiao deposition sites along the Yadu ()-Ziyun lithospheric fracture in the southeastern SYG province.
关键词	Sulfur Isotope Hydrothermal Fluid Tsr Southeastern Syg Province Sw China
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/352002/4998
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
推荐引用方式 GB/T 7714	Zhou Jiaxi,Huang Zhilong,Bao Guangping,et al. Sources and Thermo-Chemical Sulfate Reduction for Reduced Sulfur in the Hydrothermal Fluids, Southeastern SYG Pb-Zn Metallogenic Province, SW China[J]. Journal of Earth Science,2013,24(5):759-771.
APA	Zhou Jiaxi,Huang Zhilong,Bao Guangping,&Gao Jianguo.(2013).Sources and Thermo-Chemical Sulfate Reduction for Reduced Sulfur in the Hydrothermal Fluids, Southeastern SYG Pb-Zn Metallogenic Province, SW China.Journal of Earth Science,24(5),759-771.
MLA	Zhou Jiaxi,et al."Sources and Thermo-Chemical Sulfate Reduction for Reduced Sulfur in the Hydrothermal Fluids, Southeastern SYG Pb-Zn Metallogenic Province, SW China".Journal of Earth Science 24.5(2013):759-771.

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