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The origin of the carbonate-hosted Huize Zn–Pb–Ag deposit, Yunnan province, SW China: constraints from the trace element and sulfur isotopic compositions of pyrite
Yu-Miao Meng; Rui-Zhong Hu; Xiao-Wen Huang; Jian-Feng Gao; Christian Sasseville
2019
Source PublicationMineralogy and Petrology
Volume113Pages:369–391
Abstract

The Huize Zn–Pb–Ag deposit in SW China has an ore reserve in excess of 5 Mt. with an ore grade of ≥25 wt% Zn + Pb and 46– 100 g/t Ag. This deposit is hosted in Carboniferous dolostone and limestone. Sulfide mineralization is dominated by sphalerite, galena, and pyrite. Four types of pyrite (Py1 to Py4) are temporally and spatially related to mineralization distinguished on the basis of textural features and mineral associations. Pyrite 1 to 3 corresponds to the pyrite-sphalerite sub-stage, whereas Py4 corresponds to sphalerite-galena-pyrite sub-stage. Pyrite 1 shows zoned texture composed of an inclusion-rich core and an inclusion-free rim, whereas Py2, Py3, and Py4 show replacement relic or overgrowth textures. The zoned texture in Py1 was formed by multiple stages of ore fluids, whereas replacement relic texture in Py2 to Py4 was formed by replacement of pyrite by late Pb-Zn-rich fluids. Trace element variation in pyrite results from a combination of mineral inclusions, co-precipitating minerals, and various fluid compositions. Sphalerite, pyrite, and galena have δ34S values of 10.4–23.5‰, suggesting that sulfur was probably derived from the thermochemical reduction of marine sulfates. The Huize pyrite has Co and Ni concentrations (0.02–9.5 ppm and 0.08–143 ppm, respectively) and Co/Ni ratios (~0.01–2.63) similar to pyrite from sedimentary exhalative deposits, submarine hydrothermal vents, and sedimentary pyrite, which may be due to pyrite precipitation from low-temperature (<~250 °C), basin brines or seawater. The Co/Ni ratios of the Huize pyrite are lower than those (~0.2–7.2) of pyrite from Mississippi Valley-type Zn-Pb deposits. The Huize pyrite has Co and Ni contents lower than those associated with volcanogenic massive sulfide, iron oxide copper gold, and porphyry Cu deposits, arguing against the involvement of a magmatic/volcanic component and a direct genetic link between Permian Emeishan basalts and Pb-Zn mineralization. Combining with fluid inclusion temperatures and silver grade, we define the Huize deposit as a transitional type between Mississippi Valley-type and high-temperature carbonate-replacement Zn-Pb deposits.

KeywordTrace Elements Sulfur Isotopes Pyrite La-icp-ms Huize Zn–pb–ag Mvt Deposits
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/10606
Collection矿床地球化学国家重点实验室
Corresponding AuthorRui-Zhong Hu
Affiliation1.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
2.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
3.Département des Sciences de la Terre et de l’Atmosphère, Université du Québec à Montréal (UQÀM), Montréal, QC, H3C 3P8, Canada
Recommended Citation
GB/T 7714
Yu-Miao Meng,Rui-Zhong Hu,Xiao-Wen Huang,等. The origin of the carbonate-hosted Huize Zn–Pb–Ag deposit, Yunnan province, SW China: constraints from the trace element and sulfur isotopic compositions of pyrite[J]. Mineralogy and Petrology,2019,113:369–391.
APA Yu-Miao Meng,Rui-Zhong Hu,Xiao-Wen Huang,Jian-Feng Gao,&Christian Sasseville.(2019).The origin of the carbonate-hosted Huize Zn–Pb–Ag deposit, Yunnan province, SW China: constraints from the trace element and sulfur isotopic compositions of pyrite.Mineralogy and Petrology,113,369–391.
MLA Yu-Miao Meng,et al."The origin of the carbonate-hosted Huize Zn–Pb–Ag deposit, Yunnan province, SW China: constraints from the trace element and sulfur isotopic compositions of pyrite".Mineralogy and Petrology 113(2019):369–391.
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