HYDROTHERMAL METALLOGENY OF THE MIAOLING GOLD DEPOSIT IN SONGXIAN COUNTY, HENAN PROVINCE: STUDIES ON ORE GEOLOGY AND FLUID INCLUSIONS

摘要

(1) Based on cross-cutting relationships between ore veins, mineral assemblages,three mineralization stages have been identified: pyrite-quartz stage, quartz-pyrite stage, quartz-carbonate stage. (2) Experiment results display that the ore-forming fluids in Miaoling gold deposit evolved from CO_2-H_2O-NaCl magmatic hydrothermal system that intermediate-low in temperature and salinitie and containing CO_2 into H_2O-NaCl meteoric hydrothermal system that low in temperature and salinity, poor in CO_2.