陈晨,李葆华,许龙.四川耳泽金矿床成矿流体不混溶的流体包裹体证据[J].贵州地质,2018,35(2):125-130,137
四川耳泽金矿床成矿流体不混溶的流体包裹体证据
Liquid Inclusion Evidence of Mineral Liquid Immisicibility of Sichuan Erze Gold Deposit
  
DOI:
中文关键词:  流体包裹体  不混溶流体  金矿床  四川耳泽
英文关键词:Liquid inclusion  Immiscible liquid  Gold deposit  Erze Sichuan
基金项目:国家自然科学基金项目“甘肃干沙河稀土矿床碱性岩浆-流体演化过程研究”(批准号:41372094)
作者单位
陈晨 成都理工大学地球科学学院四川成都 610059 
李葆华 成都理工大学地球科学学院四川成都 610059 
许龙 成都理工大学地球科学学院四川成都 610059 
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中文摘要:
      木里耳泽金矿床矿体位于上二叠统岗达概组,矿体形态受断裂构造和层间破碎带控制,大多数呈透镜状或脉状。成矿阶段划分为菱铁矿阶段与石英—硫化物—金阶段。矿床中流体包裹体类型分为H2O包裹体、CO2包裹体、H2O-CO2包裹体,主要分布于石英—硫化物—金阶段。本文主要运用包裹体均一测温法探讨了成矿流体不混溶的热力学条件。H2O包裹体均一温度为124.6℃247.6℃,盐度为5.86%3.06%。H2O-CO2包裹体的完全均一温度为179.6℃296.6℃,部分均一温度为15.6℃30.6℃,水合物最后融化温度范围为7.5℃9.1℃,相应的盐度约为1.83%4.87%。计算的成矿压力为1 010 bar。测试过程中,富H2O相的H2O-CO2 包裹体和富CO2相的H2O-CO2包裹体的完全均一温度和压力非常接近,可以证明它们是同一时期捕获的CO2与NaCl-H2O不混溶流体包裹体组合。
英文摘要:
      Erze gold deposit is located in Dgai formation of upper Permian,the orebody is controlled by fault structure and interlayer fracture zone,most of them are lenticular and vein.The metallogenic stage can be divided into siderite stage and quartz-sulfide-gold stage.The liquid inclusion types in the deposit include H2O inclusion,CO2 inclusion,H2O-CO2 inclusion,mainly in the stage of quartz-sulfide-gold stage. In this paper,the thermodynamics condition of immiscible mineral liquid is discussed by homogeneous temperature measurement. The homogenization temperature of H2O inclusion is 124.6℃ to 247.6℃,and salinity is 5.86% to 3.06%. The average homogenization temperature of H2O-CO2 inclusion is 179.6℃ to 296.6℃,the partial homogenization temperature is 15.6℃ to 30.6℃,the final melting temperature range of hydrate is 7.5℃ to 9.1℃,the corresponding salinity is about 1.83% to 4.87%. The calculated ore-forming pressure is 1010bar.During the test,the H2O-CO2 inclusion in the H2O rich phase and CO2 rich H2O-CO2 inclusio nare very close to the homogeneous temperature and pressure,it’s proved that they are captured in the same period as CO2 and NaCl-H2O immiscible fluid inclusion combination.
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