302铀矿床绿泥石特征及其与铀成矿的关系  

Character of Chlorite and Its Relationship to Uranium Mineralization in Uranium Deposit No.302

作　　者：郭国林[1] 刘晓东[1] 潘家永[1] 张展适[1] 李兴斌 

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]湖南省核工业地质局304大队,湖南长沙410003

出　　处：《铀矿地质》2012年第1期35-41,共7页Uranium Geology

基　　金：国家自然科学基金(编号:40872072;40862005;40642010);核资源与环境国家重点实验室培育基地开放基金(编号:090913)资助项目

摘　　要：通过对302铀矿床的蚀变矿物绿泥石进行电子探针成分分析和矿物学研究,提出该矿床的绿泥石分属4种成因类型,具有4种产出形态;探讨了绿泥石的形成环境和温度,并以此对铀成矿环境进行推断。302铀矿床的成矿过程可表述为矿前期在相对较高温度的热液流体作用下,黑云母发生绿泥石化蚀变,随后热液继续交代长石,形成长石蚀变型、裂隙充填型绿泥石,进而在成矿期热液温度相对较低的条件下形成浸染型绿泥石。Based on the EPMA analysis and mineralogy study,the chlorites in uranium deposit No.302 are classified into 4 types which have 4 occurrences respectively.The forming condition and tempretures of chlorites were discussed and used to deduce the forming condition of uranium forming environment.The forming process of uranium mineralization was believed to experience different tempreture at different stage.In pro-mineralization stage,the hydrothermal solution was of high tempreture and first resulted in the chlorization of biotite,and then the metasomatism of feldspar to form chlorite of feldspar alteration type and fissure filling type.In mineralization stage,the hydrothermal solution was of low tempreture and form disseminated chlorite.

关 键 词：302铀矿床 绿泥石 铀成矿 

分 类 号：P612[天文地球—矿床学]