【摘要】 区内两大类金矿流体包裹体的研究表明 ,Ⅰ类金矿以次生包裹体为主 ,盐度为 3 5 %～4 0 % ,均一温度为 160～ 2 2 0℃ ,压力为 4 0 0× 10 5～ 70 0× 10 5Pa ,CO2 摩尔百分数小于 5 5 ,K+ /Na+ <1;Ⅱ类金矿以原生和假次生包裹体为主 ,盐度为 5 %～ 7% ,均一温度为 2 5 0～ 35 0℃ ,压力为 4 0 0× 10 5～ 80 0× 10 5Pa ,CO2 摩尔百分数一般小于 6,K+ /Na+ >1。Ⅰ类金矿液起源于太古宙变质岩重熔岩浆 ,金沉淀和矿液温度的下降有关 ;Ⅱ类金矿液起源于同熔花岗岩浆 ,金沉淀和矿液中晚期沸腾作用及围岩的硫化作用有关更多还原

【Abstract】 Study on the fluid inclusions of two types of gold deposits in the region shows that the typeⅠgold deposits are predominated by the secondary fluid inclusions,the salinity is 3 5%～4 0%,the homogenization tempreture is 160～220 ℃,the pressure is 400×10 5 ～700×10 5 Pa,and CO 2<5 5 mol%,K +/Na +<1;and the type Ⅱ gold deposits are predominated by the primary or pseudosecondary fluid inclusions,the salinity is 5%～7%,the homogenization tempreture is 250～350 ℃,the pressure is 400×10 5 ～800×10 5 Pa,CO 2<6 mol%,and K +/Na +>1.The fluid in typeⅠgold deposits originated from remelting magma of the Archean metamophic rock,the precipitation of gold is related to the decline of fluid tempreture;whereas the fluid in type Ⅱ gold deposits originated from the syntectic granite magma,the precipitation of gold is related to the middle late stage boiling of fluid and sulfurization of wall rocks.更多还原