| 吉林松江河金矿床流体包裹体特征及矿床成因 |
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| 引用本文： | 靳皇玉,于政涛,吴敬欣.吉林松江河金矿床流体包裹体特征及矿床成因[J].世界地质,2014,33(1):76-85. |
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| 作者姓名： | 靳皇玉 于政涛 吴敬欣 |
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| 作者单位： | 1. 吉林省地质调查院，长春 130061; 2. 吉林省地质科学研究所，长春 130012 |
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| 摘 要： | 松江河金矿位于夹皮沟—海沟成矿带的东南段,矿床受一韧性剪切带控制,矿体主要赋存于SN向断裂中。按矿石自然类型,可进一步划分为蚀变岩型与石英脉型。矿化类型主要为浸染状和细脉状。依据矿物共生组合、交代与穿插关系,可将松江河金矿成矿过程划分为3个阶段:黄铁矿--石英阶段、多金属硫化物--石英阶段及石英--碳酸盐阶段。研究结果表明,包裹体类型主要为气液两相包裹体及CO2三相包裹体。成矿流体均一温度范围为138℃~355℃,盐度范围为2.23%~11.60%NaCl,密度范围为0.59~0.99 g/cm3,成矿压力为64~92 MPa,成矿深度为6.45~7.88 km。主成矿阶段含CO2三相包裹体与气液两相包裹体共存,且两种类型包裹体的均一温度相近,盐度差别较大,CO2/H2O比值降低,表明成矿流体发生了以CO2逸失为特征的不混溶或沸腾,残余流体盐度升高。成矿流体的气相成分为CO2与CH4,显示出幔源的特征。综合研究表明,松江河金矿床成因类型属于中成造山型金矿。
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| 关 键 词： | 地质特征 流体包裹体 矿床成因 松江河金矿 吉林省 |
Characteristics of fluid inclusions and genesis of Songjianghe gold deposit in Jilin Province |
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| JIN Huang-yu,YU Zheng-tao,WU Jing-xin.Characteristics of fluid inclusions and genesis of Songjianghe gold deposit in Jilin Province[J].World Geology,2014,33(1):76-85. |
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| Authors: | JIN Huang-yu YU Zheng-tao WU Jing-xin |
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| Institution: | 1. Institute of Geologic Survey of Jilin Province，Changchun 130061，China; 2. Institute of Geologic Sciences of Jilin Province，Changchun 130012，China |
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| Abstract: | Songjianghe gold deposit,located in the southeast of Jiapigou-Haigou metallogenic belt,was strictly 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 assemblage,metasomatic alteration and intercalation,the process of ore-forming can be divided into three phases：pyrite-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 CO2 contain three-phase inclusions mainly.Homogenization temperatures of ore-forming fluid range from 138℃ to 355℃,salinities range from 2.23％ to 11.60％ NaCl,densities range from 0.59 g/cm3 to 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 CO2 escaping,and resulted in salinity increasing of the residual fluid.The gas-phase in fluid inclusions is chiefly made up of CO2 and CH4 and shows mantle characteristics.Comprehensive research presents that Songjianghe gold deposit belongs to the mesozonal orogenic gold deposit in genetic type. |
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| Keywords: | geological characteristics fluid inclusions deposit genesis of ore deposit Songjianghe gold deposit Jilin Province |
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