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    Re–Os and U–Pb geochronology of the Shazigou Mo polymetallic ore field, Inner Mongolia: Implications for Permian–Triassic mineralization at the northern margin of the North China Craton

    Access Status
    Fulltext not available
    Authors
    Li, H.
    Sun, H.
    Wu, J.
    Evans, Noreen
    Xi, X.
    Peng, N.
    Cao, J.
    Gabo-Ratio, J.
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, H. and Sun, H. and Wu, J. and Evans, N. and Xi, X. and Peng, N. and Cao, J. et al. 2017. Re–Os and U–Pb geochronology of the Shazigou Mo polymetallic ore field, Inner Mongolia: Implications for Permian–Triassic mineralization at the northern margin of the North China Craton. Ore Geology Reviews. 83: pp. 287-299.
    Source Title
    Ore Geology Reviews
    DOI
    10.1016/j.oregeorev.2016.12.010
    ISSN
    0169-1368
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/35032
    Collection
    • Curtin Research Publications
    Abstract

    The recently discovered polymetallic Shazigou Mo–W–Pb–Zn ore field is located at the northern margin of the North China Craton. This integrated metallogenic system is comprised of quartz vein mineralization in three deposits: Shazigou Mo–W, Jindouzishan Pb–Zn and Mantougou Pb–Zn. The total reserves are estimated to be 50 kt Mo, 626 t WO3, 244 kt Pb and 150 kt Zn. Molybdenite Re–Os dating of five quartz vein-type ores yielded a mean model age of 243.8 ± 1.6 Ma (MSWD = 0.81) and hydrothermal zircons yielded a concordant U–Pb age of 245 ± 2.6 Ma (MSWD = 0.65). These results suggest that the mineralization was formed in the early Triassic and could be related to Paleo-Asian Ocean subduction. Microthermometry and quartz fluid inclusion compositions indicate that fluids related to the Mo–W mineralization were mainly derived from magmatic sources and precipitated under relatively high temperature (280–340 °C) and salinity conditions (6–9 wt% NaCl equiv.), whereas subsequent Pb–Zn mineralization-related fluids may have been modified by metamorphic and meteoric waters. The discovery of the Shazigou ore field suggests conditions may be favourable for more extensive mineralization in the western Xilamulun Mo metallogenic belt at the northern margin of the North China Craton.

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