吉林延边五星山金矿床地质特征及矿床成因

五星山金矿床是位于延边地区的浅成低温热液金矿床,矿体产于碱长花岗岩、角闪安山岩、石英-黄铁矿脉和石英-方解石脉。研究表明,热液金矿化可分为黄铁矿-石英阶段,黄铜矿-方铅矿-闪锌矿-黄铁矿-石英阶段和石英-方解石阶段。流体包裹体研究表明,五星山金矿床主成矿阶段石英中发育气液二相流体包裹体;气液二相包裹体均一温度为134.6~324.7℃,盐度为1.16%~7.53%,密度0.73~0.94 g/cm3。包裹体岩相学、显微测温及氢、氧同位素综合研究结果表明,成矿流体为大气降水与岩浆热液混合流体。综合研究表明,五星山金矿床属浅成低温热液成因类型。

Geological characteristics of Wuxingshan Gold Deposit and genesis of the ore deposit in Yanbian,Jilin Province

Wuxingshan Gold Deposit is an epithermal gold deposit located in Yanbian District .Research shows that the mineralization can be divided into three metallogenic stages：pyrite-quartz phase ,chalcopyrite-galena-sphaler-ite-pyrite-quartz phase , and quartz-calcite phases .The study of fluid inclusions shows that gas-liquid two-phase fluid inclusions developed in quartz of the main mineralization in Wuxingshan Gold Deposit .Fluid inclusions indicate that the gas-liquid two-phase homogenization temperature ranges from 134.6 ℃ to 324.7 ℃,while salinity varies from 1.16 %to 7.53%,and density from 0.73 g/cm3 to 0.94 g/cm3 .Comprehensive study of petrography ,microthermom-etry as well as hydrogen ,oxygen and carbon isotopes of fluid inclusions showed that the ore-forming fluid is a mixed fluid which is made up of atmospheric precipitation and magmatic fluids .It is concluded that Wuxingshan Gold Deposit is epithermal in origin .