中新生代盆地砂岩型铀矿床铀矿物类型及赋存状态  

Types of Uraniam Minerial and Its Occurrence State of the Sandstone-type Uranium Deposits in the Meso-cenozoic Basin

作　　者：刘杰[1] 聂逢君[1] 侯树仁[2] 陈路路[1] 王俊林[2] 

机构地区：[1]东华理工大学核资源与环境国家重点实验室培育基地,江西南昌330013 [2]核工业208大队,内蒙古包头014100

出　　处：《东华理工大学学报（自然科学版）》2013年第2期107-112,119,共7页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金项目(40972067)

摘　　要：中新生代盆地由于其特定的沉积特征,产出大量的砂岩型铀矿床,赋矿载体多为中细砂岩。为了查明砂岩型铀矿中铀矿物类型以及赋存状态,通过电子探针现代分析测试方法对铀矿物类型进行定量、定性分析,根据测试结果显示铀矿物类型主要有铀石、水硅铀矿、沥青铀矿、钛铀矿、菱钙铀矿和铀钍矿,以及铀的碳酸盐,主要与石英、长石、黄铁矿等共生,以及粘土矿物和有机质的吸附形式赋存于砂岩中,铀矿物的沉淀、富集与砂岩地层中pH值和Eh值有着密切关系。Because of its particular sedimentary characteristics, a lot of sandstone-type uranium deposits are discovered in the meso-cenozoic basin,and its host rocks are considered to be medium-to-fine sandstone. In order to find out uranium mineral types of the sandstone-type uranium deposits and its occurrence state, quantitative and quali- tative analysis are carried out by electron probe Modern analysis test method. From the analysis results, it is found that the uranium minerals mainly include coffinite, swamboite, uraninite, brannerite, zellerite, uranothorite, and Uranium carbonate mineral. Uranium minerals are symbiotic with Quartz, Albite, Pyrite and so on. Another existance is adsorption of Clay mineral and organic matter, in addition, Precipitation and concentration of uranium mineral have a close relationship with pH and Eh value in a sandstone formation .

关 键 词：中新生代盆地 砂岩型铀矿 铀矿物 赋存状态 

分 类 号：P619.14[天文地球—矿床学]