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 betweenrnore veins, mineral assemblages,three mineralizationrnstages have been identified: pyrite-quartz stage,rnquartz-pyrite stage, quartz-carbonate stage.rn(2) Experiment results display that the ore-formingrnfluids in Miaoling gold deposit evolved fromrnCO_2-H_2O-NaCl magmatic hydrothermal system thatrnintermediate-low in temperature and salinitie andrncontaining CO_2 into H_2O-NaCl meteoric hydrothermalrnsystem that low in temperature and salinity,rnpoor in CO_2.