Abstract
In the thesis, we studied fluid inclusions in minerals and mineralization epochs of Luziyuan Pb-Zn deposits in eastern of Zhenkang Yunnan province. 240 available data have been obtined by observing characteristics of fluid inclusions in sphalerite, quartz, fluorite, calcite under microscope and selecting 284 primary inclusions and secondary inclusions thermometry. Various mineralization epochs homogenization temperature, freezing temperatures, salinity frequency histogram showed a bimodal distribution mode. The fluid inclusions in sphalerite have a greatly important,it is ore-forming fluids. Its homogenization temperature distributed in 240 to 270°C (medium temperature) and 187 to 220°C (low temperature) within the range of two, (W NaCl) salinity is 5.0% to 10.6%. According to the homogenization temperature and salinity, it can be deduced Luziyuan mineralization fluids density of 0.82 to 0.96 (gcm-3). Draw the deposits are mainly two hydrothermal mineralization, a hydrothermal in medium temperature, another period of low and medium temperature. The two ore-forming fluids are medium salinity and medium-density.
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