The role of mantle melting in granite-associated hydrothermal systems: He–Ar isotopes in fluids responsible for Sn–Ag–Pb–Zn mineralization in northeast China

Zhou, Zhenhua; Mao, Jingwen; Stuart, Finlay M.; Chen, Xinkai; Wilde, Simon A.; Ouyang, Hegen; Gao, Xu; Zhao, Jiaqi

doi:10.1007/s00126-023-01186-8

Cited by 6 publications

(1 citation statement)

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“…The epithermal deposit closely related to silver, lead, and zinc mineralization is an important type of deposit [24][25][26][27][28][29][30]. In recent years, several studies concluded that bismuth and silver could coexist in many silver deposits, and bismuth may promote the precipitation of silver, providing a new insight into the silver mineralization [2,[31][32][33].…”

Section: Silver Precipitation Mechanismmentioning

confidence: 99%

The Occurrence and Chemical Composition of Bismuth-Bearing Minerals in the Niuxingba-Liumukeng Ag-Pb-Zn Deposit, Jiangxi Province, South China

Yue,

Zhai,

Zhao

et al. 2023

Minerals

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The Niuxingba-Liumukeng deposit, located in the Yinkeng ore field (Jiangxi province, South China), is a typical Ag-Pb-Zn deposit hosted in the Yudu-Ganxian metallogenic belt. Based on the field investigation and mineralogical studies, the mineralization of this deposit can be divided into three stages: quartz-pyrite-arsenopyrite stage (I), quartz-galena-sphalerite-sulfosalt stage (II), and quartz-carbonate stage (III), with stage II being the main Ag mineralization stage. In this contribution, we reported the occurrence of bismuth-bearing minerals in this hydrothermal deposit and its implications for ore formation. Based on the results of electron microprobe analyses, we infer that the dominant occurrence of bismuth at Niuxingba-Liumukeng is primarily marked by solid solutions within the crystal lattice of galena and as visible independent bismuth-bearing minerals. The independent bismuth minerals consist of berryite [Pb3(Ag,Cu)5Bi7S16], emplectite (CuBiS2), and aikinite (PbCuBiS3). Most bismuth minerals replace chalcopyrite or fill in the cracks of pyrite and chalcopyrite. Meanwhile, we found a large number of Bi-bearing minerals closely coexisting with Ag-bearing minerals, indicating that bismuth may have played a crucial role in silver deposition from hydrothermal fluids. We considered that the existence of bismuth-rich melts associated with the ore-forming hydrothermal systems could help to promote the enrichment and precipitation of silver to form economic ores.

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