相山铀矿田邹家山矿床流体包裹体研究

笔者对相山铀矿田邹家山矿床铀矿石中的流体包裹体进行研究,结果表明该矿床的均一温度分布范围较广,为122～360℃。矿床形成温度有两个阶段,分别是高温阶段213～360℃(平均值为263.1℃)和低温阶段122～185℃(平均值为142.7℃),属于中低温热液铀矿床。高温阶段盐度变化范围为(1.74～7.31)wt%(平均值为3.77wt%),低温阶段盐度变化范围为(0.88～2.57)wt%(平均值为1.64 wt%)。矿床成矿溶液高温段的平均密度0.78g/cm3,成矿压力204.57×105 Pa,成矿深度0.68km;低温段的平均密度0.92g/cm3,成矿压力96.08×105 Pa,成矿深度0.32km。据此推测,邹家山铀矿床的成矿流体来源主要是岩浆期后热液,同时伴有大气水热液。

Discussion on the Physicochemicai Conditions of Uranium Mineralization of Zoujiashan Deposit in Xiangshan Orefield

This paper is mainly on the fluid inclusions of uranium ores form Zoujianshan deposit in Xiangshang uranium ore-field. Test result of fluid inclusions shew that the homogenization temperature distributed in a wide range from 122℃ to 360 ~C and can be divided into two phases. The high temperature phase was from 213 to 360℃ with the average of 263. 1℃ and low temperature phase was from 122 to 185℃ with the average of 142.7℃, which suggest that the deposit falls into median-low temperature hydrothermal deposits. In high temperature phase, the salinity of inclusion was （1.74-7.31） wt% with the average value of 3.77wt%, and in low temperature phase the salinity ranged from 0.88wt% to 2.57wt% with the average of 1.64wt%. In high temperature phase, the mineralization solution was with the average density of 0. 78g/cm3 and the pressure of 204. 57 × 10^5 Pa which refer to the depth of 0.68km. In low temperature phase the mineralization solution was with the average density of 0.92g/cm3 and pres- sure of 96.08×10^5Pa which refer to the depth 0. 32kin. By summarizing the above information, we can inferred that the ore forming fluid is the main from post-magmatic hydrothermal fluid which was accom- panied by atmospheric water.