新疆蒙其古尔铀矿床成矿流体研究  

A study of ore-forming fluid in Mengqiguer uranium deposit, Xinjiang

作　　者：修晓茜[1] 刘红旭[1] 张玉燕[1] 所世鑫[1] 

机构地区：[1]中核集团铀资源勘查与评价技术重点实验室核工业北京地质研究院,北京100029

出　　处：《矿床地质》2015年第3期488-496,共9页Mineral Deposits

基　　金：973项目"中国北方砂岩型铀成矿带陆相盆地沉积环境与大规模成矿"(编号:2015CB453004);国家"863"高技术研究发展计划(编号:2012AA061801);中国核工业集团重点课题专项(编号:DZD162-1)联合资助

摘　　要：文章对新疆蒙其古尔铀矿床成矿流体中的包裹体、酸解烃和镜质体反射率进行了分析研究。结果表明：该矿床的成矿流体主要为层间含氧含铀水和还原性烃类;石英裂隙中存在的流体包裹体主要是次生的富液盐水包裹体和液烃包裹体。测得流体包裹体的均一温度为50-67℃,平均66℃;w（NaCleq）为1.40%-14.04%,平均4.49%;成矿流体密度为0.98-1.04 g/cm^3,平均1.01 g/cm^3;说明成矿流体为低温低盐度流体,有机质热演化形成的甲烷等烃类参与了成矿过程。Based on the analysis of fliud inclusions, acidolysis hydrocarbon, and vitrinite reflectance, the authors studied the nature of the metallogenic fluid in the Mengqiguer uranium deposit. It is found that ore-forming fluid mainly includes water-bearing interlayer oxygen uranium and reducing hydrocarbons. There are many salty rich fluid inclusions and hydrocarbon inclusions existing in quartz cracks. Metallogenic process resulted from thermal evolution of organic matter of hydrocarbons such as methane and ethane which participated in the mineralization. Inclusion homogenization temperatures are in the range of 50-67℃, with an average of 66.2℃. Salinities vary in the range of 1.40%-14.04%, 14.04% on average. Densities of ore-forming fluid are in the range of 0.98 - 1.04 g/cm^3, with an average of 1.01 g/cm^3, suggesting that the ore-forming fluid is characterized by low temperature and low salinity, with the nature of atmospheric precipitation.

关 键 词：地球化学 流体包裹体 流体密度 有机质 蒙其古尔 

分 类 号：P619.14[天文地球—矿床学]