论铀镭平衡问题

Discussion on the issue of uranium-radium equilibrium

铀镭平衡系数是表征铀矿样品铀镭平衡状态的物理参数,对准确估算矿区的铀资源量,评价研究区的铀成矿潜力具有重要意义。笔者从铀镭平衡系数的定义和计算方法出发,讨论了铀镭平衡系数在铀矿勘查过程中的作用和影响,以及不同类型铀矿床的铀镭平衡系数特征,强调造成铀镭不平衡的本质是在铀系的1个平衡周期内(约1.9 Ma),发生了铀或镭的再分配,并分析了可能造成样品偏铀或偏镭的原因。

U—Ra equilibrium coefficient is a geophysical parameter which characterizes the uranium—radium equilibrium state of uranium ore samples.It has great significance for accurately estimating the uranium resources of ore districts and evaluating the uranium mineralization potential of the study area.This study clarifys the definition and calculation method of U—Ra equilibrium coefficient,discusses the factions and influence of U—Ra equilibrium coefficient in uranium exploration process,as well as the characteristics of U—Ra equilibrium coefficient of different types of uranium deposits.Here the author emphasizes that the essence of U—Ra disequilibrium is the redistribution of uranium or radium within one equilibrium period of the uranium series(about 1.9 Ma),and analyzes the potential reasons for sample deviation from uranium or radium.