诸广岩体南部长排铀矿床流体包裹体研究

Characteristics of Fluid Inclusions in Changpai Uranium Deposit in the Southern Zhuguang

长排铀矿床是新发现的花岗岩大型铀矿床。为探讨矿床成因,研究成矿期石英、方解石和萤石的流体包裹体。研究结果显示,流体包裹体为H_(2)O型,均一温度为200.4~214.6 ℃和181.2~197.2 ℃两个区间,不同钻孔不同样品中的流体盐度平均值基本一致,成矿流体为中低温、低盐度NaCl-H_(2)O流体。矿床为中低温、低盐度流体与中高温、高盐度流体的混溶作用形成的中低温热液型矿床。

The Long Row uranium deposit is a newly discovered large uranium deposit in granite.In order to explore the genesis of the deposit,the fluid inclusions of quartz,calcite and fluorite during the mineralization period were studied.The results show that the fluid inclusions are of H_(2)O type,with two intervals of homogeneous temperature ranging from 200.4~214.6℃and 181.2~197.2℃,and the average values of fluid salinity in different samples from different boreholes are basically the same,and the mineralizing fluid is a medium-low-temperature,low-salinity NaCl-H_(2)O fluid.The deposit is a medium-low temperature hydrothermal deposit formed by the miscibility of medium-low temperature,low salinity fluid and medium-high temperature,high salinity fluid.