氦和氡都是放射性元素衰变产生的惰性气体,当地下水和地表水流经铀矿体及其原生晕时,相互接触作用,使铀转入到水溶液中。在地下水的流动、渗滤及扩散等作用下,铀矿体附近便会形成氦和氡的水化学晕。这种水化异常的形状,主要和地下水的流动方向有关。而 Both helium and radon are inert gases produced by the decay of radioactive elements. When local groundwater and surface water flow through the uranium ore body and its primary halo, they interact with each other to transfer uranium into the aqueous solution. Under the action of groundwater flow, percolation and diffusion, hydrated halo of helium and radon will form near the uranium ore body. This abnormal shape of hydration, mainly related to the direction of groundwater flow. and