| 吉林夹皮沟立山金矿床流体包裹体特征及成矿温度 |
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| 关键词:Jiapigou gold metallogenic zone Lishan gold deposit quartz vein type fluid inclusion temperature-pressure condition |
| 基金项目:中国地质调查局项目"华北地台成矿规律及找矿方向综合研究"(编号:200110200038) |
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| 摘要: |
| The Fluid Inclusion Features and Metallogenic Temperature of the Lishan Gold Deposit in Jiapigou, Jilin Province |
| Lishan is a large-size quartz vein type gold deposit in Jiapigou area. A study of fluid inclusions in quartz vein type ores collected from Old No. 5 ore vein shows that there are four types of primary fluid inclusions in quartz of this mine, i. e. , Ⅰ-carbon dioxide,Ⅱ-carbon dioxide-bearing three-phase, Ⅲ-aqueous two-phase and Ⅳ-single liquid phase. The microthermometric study of fluid inclusions reveals that the homogenization temperature of these kinds of fluid inclusions ranges from 218.2℃to 420℃, and salinity from 3. 1%NaCl to 11.4%Nad. The intergrowth of Types Ⅰ,Ⅱand Ⅲ fluid inclusions, combined with analyses of carbon dioxide phase fluid inclusions, leads to the conclusion that the ore-forming solutions are of the immiscible NaCl-H2O-CO2 system. According to the temperature-pressure estimation method for immiscible systems, the metallogenic temperature and metallogenic pressure are estimated to be 335-415℃ and (750-1 250)×105 Pa respectively, suggesting that this deposit was formed in a depth of 4. 4 -7.5km. |
| DAI Jun-zhi,WANG Ke-yong,CHENG Xin-min,YANG Yan-chen.2005.The Fluid Inclusion Features and Metallogenic Temperature of the Lishan Gold Deposit in Jiapigou, Jilin Province[J].Acta Geoscientica Sinica,26(1):21-24. |
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