摘要
夹皮沟立山金矿为一大型石英脉型金矿床。对取自该区老5号矿脉石英脉型金矿石流体包裹体研究表明,该区石英 中主要发育CO2,含CO2三相,气液两相及单液相等4种类型原生流体包裹体;测温结果显示,各类流体包裹体均一温度为 218.2～420.0℃,盐度为3.1％～11.4％;经CO2包体、富CO2包体及气液两相包体共生发育及包体中CO2相成分分析结果 表明,成矿流体为不混溶体NaCl-H2O-CO2系类型。据不混溶体系成矿温压估算方法,确定该矿床成矿温度为335～415.0 ℃,成矿压力为(750～1250)×105 Pa,成矿深度约为4.4～7.5 km。
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.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2005年第1期21-24,共4页
Acta Geoscientica Sinica
基金
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)资助
