吉林延边刺猬沟金矿床流体包裹体特征及矿床成因研究

刺猬沟金矿床的大地构造位置处于兴蒙造山带东段的汪清火山岩盆地内，矿体赋存于安山岩一安山质火山角砾岩层中，受区域性断裂、破火山口内放射状断裂系统控制。流体包裹体的研究表明，主成矿期的流体包裹体均一温度为230．8～265．6℃，盐度为6％～9％，属于较低温、低盐度流体。氢氧同位素分析表明，刺猬沟金矿床成矿流体为大气降水和岩浆水混合流体。综合研究刺猬沟金矿床矿石特征、围岩蚀变特征、流体特征和同位素特征等，确定刺猬沟金矿床属于低硫化型浅成低温热液型金矿床。

Characteristics of fluid inclusion and its ore genesis of the Ciweigou gold deposit in Yanbian Region

Geotectonic structure of Ciweigou gold deposit is located in Wangqing volcanic basin, eastern section of the Xing＇an-Mongolian orogenic belt. The orebodies are hosted in andesite-andesitic volcanic breccia, and controlled by the regional fractures and radial fracture system of ealdera. The homogenization temperatures of fluid inclusions range from 230.8 ℃ to 265.6℃in main metallogenic period according to fluid inclusion research, and salinities range from 6 % to 9 %, which indicates the fluid belongs to a lower temperature and low salinity system. Results of hydrogen-oxy- gen isotope analysis show that the ore-forming fluid of Ciweigou is the mixing fluid of meteoric water and magmatie wa- ter. Comprehensive research of characteristics of ores, wall rock alteration, fluids and isotopes in the deposit show that Ciweigou gold deposit belongs to low-sulphidation epithermal gold deposit.