摘要
为探讨蒙其古尔铀矿床成矿流体的性质,为矿床成因提供新的依据,本文对该矿床开展了系统的流体包裹体研究。结果表明,石英裂隙中存在的包裹体主要是次生的富液盐水包裹体和含烃水溶液包裹体。包裹体均一温度为51-77℃,平均66.2℃;盐度1.4%-14.04%Na Cleq,平均4.49%Na Cleq;成矿流体密度0.98-1.04g/cm3,平均1.01g/cm3,说明成矿流体为低温低盐度中密度流体,具有大气降水成因的性质。计算得出成矿压力为（38.74-80.48）×105Pa,平均53.31×105Pa,成矿深度为0.13-0.26km,平均0.18km。从而推断蒙其古尔铀矿床属于低温浅成后生表生铀矿床。
This research studied the characteristics of fluid inclusions in the Mengqiguer uranium deposit and discussed the nature of the ore-forming fluid. The result revealed that the inclusions in the fractures of quartz are mainly inclusions of secondary liquid-rich brine inclusion and aqueous inclusion containing hydrocarbon. The homogenization temperature of inclusions varies from 51 to 77 ℃ with an average of 66. 2 ℃; the salinity of inclusions ranges from 1. 4% to 14. 04%with an average of 4. 49%; the metallogenic fluid density of inclusions ranges from 0. 98 to 1. 08 g/cm3 with an average of1. 01 g/cm3. The ore forming fluid,which has low temperature,salinity and medium temperature fluid low salinity,originated from meteoric waters. The calculated metallogenic pressure ranges from 38. 74 ×105to 80. 48 ×105Pa with an average of 53. 31 ×105Pa; the metallogenic depth ranges from 0. 13 to 0. 27 km with an average of 0. 18 km. The Mengqiguer uranium deposit is an epithermal epigenetic uranium deposit. The linear relationships among salinity,density and metallogenic depth of inclusions indicated that the Mengqiguer uranium deposit underwent multi periods of mineralization.
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2015年第1期201-207,共7页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家高技术研究发展计划(2012AA061801)
中国核工业集团重点课题专项(DZD162-1)
973子课题(2015CB453004)
关键词
流体包裹体
成矿流体
铀矿床
新疆
fluid inclusions； mineralization fluid； uranium deposit； Xinjiang
作者简介
修晓茜（1987-），女，工程师，研究方向：铀矿地质研究．E—mail：xiaoxi_0210@163．com．
