Volume 43 Issue 1
Jan.  2024
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Article Contents
LUO Hua, GUO Pan, LIU Li, PAN Longke, DUAN Xianfeng, MAO Qixi, LIAO Mingfang. Fluid inclusion and C-H-O-S-Pb isotope characteristics and geological significance of lead-zinc-fluorite deposits in the Geleche area, Laifeng, Hubei Province[J]. Bulletin of Geological Science and Technology, 2024, 43(1): 39-50. doi: 10.19509/j.cnki.dzkq.tb20220242
Citation: LUO Hua, GUO Pan, LIU Li, PAN Longke, DUAN Xianfeng, MAO Qixi, LIAO Mingfang. Fluid inclusion and C-H-O-S-Pb isotope characteristics and geological significance of lead-zinc-fluorite deposits in the Geleche area, Laifeng, Hubei Province[J]. Bulletin of Geological Science and Technology, 2024, 43(1): 39-50. doi: 10.19509/j.cnki.dzkq.tb20220242

Fluid inclusion and C-H-O-S-Pb isotope characteristics and geological significance of lead-zinc-fluorite deposits in the Geleche area, Laifeng, Hubei Province

doi: 10.19509/j.cnki.dzkq.tb20220242
More Information
  • Corresponding author: LUO Hua, E-mail: 270132397@qq.com
  • Received Date: 26 May 2022
  • Accepted Date: 30 Aug 2022
  • Rev Recd Date: 29 Aug 2022
  • Objective

    Lead-zinc mineralization is widely distributed in southwestern Hubei Province, but no large deposits have been found thus far, and there is a lack of systematic studies on metallogenic systems.

    Methods

    The C-H-O-S-Pb isotope analysis and the homogenization temperature of fluid inclusions of lead-zinc-fluorite ore in the Geleche area of Laifeng were conducted.

    Results

    The results show that the homogenization temperature of fluid inclusions in fluorite and calcite is concentrated between 137-170℃, and the variation range of salinity is 11.46%-16.89%. It is a NaCl-H2O system with low temperature and medium and low salinity. The main source may be metamorphic dehydration of rock formations containing sedimentary sulfate (marine sediments). The δ34S content ranges from 9.5‰ to 11.8‰, with an average of 10.92‰. 206Pb/204Pb < 18.20, 207Pb/204Pb>15.60, and 208Pb/204Pb < 39.00, and the floating ratio is small and high μ and high ω.

    Conclusion

    The sulfur and lead sources are mainly from the Ordovician and Cambrian ore-bearing strata in the Paleozoic sedimentary basin of the upper crust. Syngenetic sedimentary diagenesis and epigenetic medium- and low-temperature hydrothermal transformation are the dominant genetic types of the Geleche mining area. Compared with the typical lead-zinc deposits in the Yangtze Platform of West Hubei and Hunan, they have great similarity and obvious differences in metallogenic fluid, Paleozoic sedimentary environment and tectonic background.

     

  • The authors declare that no competing interests exist.
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