湘西江东湾金锑矿床流体包裹体及矿床形成机制研究  

Study on the Fluid Inclusions of Jiangdongwan Au-Sb Deposit Western Hunan

作　　者：陈方楠 夏菲[1] 

机构地区：[1]东华理工大学放射性地质与勘探技术国防重点学科实验室,南昌330013

出　　处：《能源研究与管理》2015年第2期25-30,共6页Energy Research and Management

摘　　要：江东湾金锑矿是湘西锑金砷成矿带内的重要矿床。在详细的岩相学基础上,对该矿床石英中流体包裹体进行显微测温学研究,结果显示,石英中流体包裹体以气液两相包裹体为主,成矿温度163-290℃,包裹体盐度ωNa Cl为1.73%-15.3%,属于中-低温度、中-低盐度流体体系,流体密度为0.81-1.01 g/cm^3,压力13-40 MPa,成矿深度为0.5-1.4 km;包裹体均一温度有180-240、250-280℃2个峰值区间,指示成矿作用具多期性;流体包裹体研究表明,该矿床形成机制以流体混合为主。Jiangdongwan Au-Sb deposit is an important deposit of the Au-Sb-As metallogenie belt of Jiangdongwan in Western Hunan. On the basis of detailed petrographical study this paper mainly studies the microthermometry of fluid inclusions in quartz this deposit. The results showed that the fluid inclusions in quartz mainly are gas-liquid two phase inclusions. The ore-forming temperature is 163-290 ℃, salinity of inclusions is 1.73%-15.3%, belong to the fluid system of middle to low temperature and middle to low salinity. The fluid density is 0.81-1.01 g/cm^3, the pressure lies between 13-40 MPa, the mineralization depth is 0.5-1.4 kin. The homogenization temperature of the fluid inclusion have two main distribution ranges, respectively for 180-240℃ and 250-280 %, indicate the mineralization has many stages. The studies of fluid inclusions in quartz indicate that the formation mechanism of deposit mainly is fluid mixing.

关 键 词：流体包裹体 显微测温 成矿作用 江东湾金锑矿 湘西 

分 类 号：P62[天文地球—地质矿产勘探]