1. Institute of Geologic Survey of Jilin Province��Changchun 130061��China; 2. Institute of Geologic Sciences of Jilin Province��Changchun 130012��China

Songjianghe gold deposit��located in the southeast of Jiapigou-Haigou metallogenic belt��was strict- ly controlled by a ductile shear zone and ore-bodies occurred in the SN trending faults�� According to the natural type of ores��the ore can be divided into altered rock type and quartz-vein type�� On the basis of the mineral assem- blage��metasomatic alteration and intercalation��the process of ore-forming can be divided into three phases: py- rite-quartz stage��polymetallic-quartz sulfides stage and quartz-carbonate stage�� Our studying results show that fluid inclusions in quartz can be classified into aqueous two-phase and CO2contain three-phase inclusions mainly�� Hom- ogenization temperatures of ore-forming fluid range from 138�� to 355�棬salinities range from 2. 23% to 11. 60% NaCl��densities range from 0. 59 g/cm3to 0. 99 g/cm3and the ore-forming pressure ranges from 64 to 92 MPa��the ore-forming depth ranges from 6. 45 km to 7. 88 km�� In the main metallogenic stage��aqueous two-phase and CO2-- contain three-phase inclusions coexist��with the close homogenization temperatures��big difference in salinity and decreasing CO2/H2O ratio��which shows the immiscibility or boiling characterized by CO2escaping��and resulted in salinity increasing of the residual fluid�� The gas-phase in fluid inclusions is chiefly made up of CO2and CH4and shows mantle characteristics�� Comprehensive research presents that Songjianghe gold deposit belongs to the mesozo- nal orogenic gold deposit in genetic type��