Volume 28 Issue 3
Jun.  2022
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Article Navigation >  Journal of Geomechanics  > 2022  >  28(3): 406-416
LOU Yuanlin, TANG Yao, GUO Wei, et al., 2022. Geologic characteristics of the Naqiong Sb-Au deposit and prospecting prediction for Au-polymetallic deposits in Longzi County, Tibet. Journal of Geomechanics, 28 (3): 406-416. DOI: 10.12090/j.issn.1006-6616.2021143
Citation: LOU Yuanlin, TANG Yao, GUO Wei, et al., 2022. Geologic characteristics of the Naqiong Sb-Au deposit and prospecting prediction for Au-polymetallic deposits in Longzi County, Tibet. Journal of Geomechanics, 28 (3): 406-416. DOI: 10.12090/j.issn.1006-6616.2021143
shu

Geologic characteristics of the Naqiong Sb-Au deposit and prospecting prediction for Au-polymetallic deposits in Longzi County, Tibet

doi: 10.12090/j.issn.1006-6616.2021143
  • 1.

    Changsha Natural Resources Comprehensive Survey Center, China Geological Survey, Changsha 410600, Hunan, China

  • 2.

    Kunming Natural Resources Comprehensive Survey Center, China Geological Survey, Kunming 650100, Yunnan, China

  • 3.

    Changde Vocational Technical College, Changde 415000, Hunan, China

Funds:

the Projects of China Geological Survey 1212011121236

the Projects of China Geological Survey 12120114083501

More Information
  • Received: 2021-10-21
  • Revised: 2022-04-04
    Abstract
  • The Naqiong Sb-Au deposit is a newly discovered Au-polymetallic deposit in Longzi county, Tibet. Recent years of regional geological surveys reveal that its mineralized zone is controlled by fault structure. In view of the relatively low research degree of this deposit, specialized and systematic research on its metallogenic geologic conditions, geologic characteristics and prospecting potentials will lay a foundation for further prospecting and exploration work of this deposit. The geologic characteristics, geophysical and geochemical anomaly characteristics, and inclusion geochemical characteristics are analyzed based on the regional metallogenic geological background. The analysis results in combination with the remote sensing geologic characteristics and anomaly verification work show that the ore bodies mainly occur in the Nieru formation of the upper Triassic and are controlled by the EW-trending secondary fault structural belt. Three fractured alteration zones have been found. Through the soil geochemical profile survey, Sb, Au, As, Bi and Cu are selected as the indicator elements for Sb and polymetallic mineralization. Altogether there are ten single element anomalies, showing good match with each other. Two polarization bodies and three apparent polarizability anomalies are defined by induced polarization intermediate gradient measurement. The fluid inclusions related to mineralization are mainly liquid-rich inclusions. It is inferred that the fluid in the mining area belongs to a medium-low temperature and low salinity NaCl-H2O hydrothermal system containing traces of CO2 and N2. Overall, the available data support the notion that the Naqiong Sb-Au mining area has superior metallogenic conditions for Au-polymetallic deposits.

     

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