Jinying Gold Deposit is situated on the eastern section of the northern margin of China-Korea quasi-platform.It lies on the depression side of the contact interface between Tieling-Jingyu uplift and Taizihe-Hunjiang depression fold fault bundle.Through field investigation,mineralogical analysis,electron probe,and fluid inclusion testing,it has been determined that the deposit's mineral composition is uncomplicated and consists of siliceous struc-tural breccia-type ore.The gold mineral species include native gold,silver-bearing native gold,and electrum,with quartz being the primary host for gold which occurs mainly as fissure gold,followed by intergranular and encased gold.The inclusions within quartz consist primarily of gas-liquid two-phase fluids,which take on a predominantly oval,diamond and irregular form.Ore formation occurs at temperatures ranging from 139.6 ℃ to 253.1 ℃,with salinity levels between 1.74％and 4.65％,densities ranging from 0.79 g/cm3 to 0.94 g/cm3,pressures between 33.6 MPa and 65.6 MPa,and depths of formation spanning from 1.2 km to 2.4 km;these characteristics classify the fluid as medium-low tempera-ture,low salinity,and low density.
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