【摘要】 虎家尖银金矿床的主要银矿物有银黝铜矿-黝锑银矿、深红银矿、辉银矿-螺状硫银矿、脆银矿、辉锑银矿、硫锑铅银矿、辉锑铅银矿、捷辉锑银铅矿等;矿化包括石英-碳酸盐阶段、石英-硫化物阶段、碳酸盐阶段和银硫盐阶段;成矿流体为低盐度（约7％重量NaCl）、中低温（254～175℃）热液;成矿体系压力约150MPa,lgfs₂变化于-18.5～-10.0;lgfo₂变化于-41.6～-32.0间,f_co2高于（6.03～0.32）×10⁵Pa,温度下降、人_S2降低导致银、金的硫氢配合物分解,银、金矿物沉淀析出。更多还原

【Abstract】 The major silver minerals in the Hujiajian Ag-Au deposit include tetrah-edrite-freibergite, pyrargyrite, argentite-acanthite, stephanite, miargyrite, an-dorite, diaphorite, terekovite and canfieldite, etc., the mineralization process inv-olved four stages: the quartz-carbonate stage, the quartz-sulfide stage, the ca-rbonate stage and the silver sulfosalt stage. The ore-forming fluid is a hydrot-hermal solution low in salinity （about 7 wt.% NaCl） and moderate to low in temperature （254℃ to 175℃）. The pressure in the ore-forming system is about150 MPa, and the fs₂, fo₂, and f_co2 are about 10^-18.5～10^-10.0, 10^-41.5～10^-32.0and>6.03～0.32×10⁵ Pa. The decrease of temperature and fs₂ resulted in thedecomposition of the HS^- complexes of silver and gold, followed by the preci-pitation of silver and gold minerals.更多还原