蒙其古尔铀矿床富大矿体成因初探

摘要

蒙其古尔铀矿床是国内重要铀矿产地。在层间氧化带砂岩型铀成矿理论基础上，阐述矿床外部成矿动力因素包括构造运动及水动力系统，借助微观研究分析了粘土矿物的形成及对铀矿物的吸附富集作用等。有机质的吸附作用，还原性烃类、微生物等还原剂对铀元素有效聚集起重要作用。从成矿机理上看，构造运动、水动力系统、铀源、铀储存空间等系铀成矿的基本条件，有机质、还原性烃类、微生物等还原性物质的含量，是富大矿体形成的关键性因素。%Mongolian uranium deposit is one of the important uranium producing areas in China.Based on the theory of the sandstone type uranium mineralization of interlayer oxidation zone,this paper expounds the metallogenic dynamics of the external factors include tectonic movement and hydrodynamic system,with the help of microcosmic research,analy-ses the formation of clay minerals and its adsorption on uranium mineral enrichment,etc.The adsorption effect of organic matter,reducing hydrocarbon,microorganism,all these such as reducing agent for uranium element effective accumulation are play an important role. From the metallogenic mechanism, tectonic movement,the hydrodynamic system, uranium source,storage space are the basic conditions of uranium mineralization, but organic matter, the content of reducing mate-rial such as hydrocarbons, microbial, are the key factors for the formation of rich large ore body.