摘要
通过对金矿石石英内的原生、假次生包裹体的系统研究,查明流体包裹体主要是NaCl-H2O型,其次是CO2型.测温结果显示成矿流体温度为100℃~352℃;盐度(ω(NaCl))=0.88%~8.55%,密度为0.356~0.997g/cm^3,估算成矿压力为48.83~71.29MPa,成矿深度为1.62~2.34km,属中深中温热液金矿床.成矿流体液相成分富含Na^+、K^+、Cl^-、SO4^2-及少量Mg^2+和F^-;气相成分以H2O为主,其次是CO2和少量的CH4、C2H6、N2及微量的H2S和Ar.依据成矿流体Na^+/K^+=1.32、Na^+/(Ca^2++Mg^2+)=100.61以及矿床与侵入体的关系进行判定,成矿流体主要来源于初始混合岩浆水,并有变质水及大气降水叠加.
Based on systematic observation on primary, pseudo -secondary inclusions in quartz in the Liupiyegou gold deposit, fluid inclusions are mainly NaCl- H2O type, and less CO2 type. Microthermometfic measurements show that temperature of ore- forming fluids is 100℃~352℃, salinity 0. 88%~8.55%, and density 0. 356~0.997g/cm^3. Estimated mineralizing pressure are 48.83 ~ 71.29MPa with mineralizing depth 1.62 ~ 2.34km. The deposit belongs to middle temperature and middle depth hydrothennal gold one. Liquid composition of ore -forming fluids is fichen in Na^+ , K^+ , Cl^- , SO4^2- and few Mg^2+ and F^-. Gas composition is mainly H2O, then CO2, some CH4, C2H6 and N2 , and less H2S and Ar. According to that Na^+/K^+ is 1.32 and (Ca^2+ +Mg^2+ ) is 100.61, it is concluded that ore - forming, fluids came from initial magma water, and with mixed metamorphic and meteoritic water.
出处
《地质与勘探》
CAS
CSCD
北大核心
2006年第4期36-40,共5页
Geology and Exploration
关键词
流体包裹体
成矿流体
六批叶沟金矿床
吉林
ore - forming fluid, fluid inclusion, Liupiyegou gold deposit, Jilin