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地球是由各种元素所组成,铀系元素(铀、镭……等)是其中组成元素之一,据估计,铀元素在地壳中的数量约为1.3×10~(14)吨,从这个数值来看,还是很可观的。但由于铀元素分布极为分散,能提供给人们开采的铀矿床并不多,它在地壳中平均品位约占百万分之三左右,仅个别富集地区含量较高,这就是具有开采价值的铀矿床。由于铀的存在极为分散,有些金属矿床可能与其共生。铀是一种放射性元素,有它的存在,就有镭存在,镭的衰变产物——氡及氡子体将会不断地产生出来。因此,
Earth is composed of various elements, uranium (uranium, radium ...) is one of the elements, it is estimated that the amount of uranium in the crust is about 1.3 × 10 ~ (14) tons, from this Numerical point of view, still very impressive. However, due to the extremely scattered distribution of uranium elements, there are not many uranium deposits that can be provided to people for mining. The average grade of uranium deposits in the crust is about 3 parts per million, and only a few enrichment areas have high contents, Uranium deposit. Due to the extremely dispersed existence of uranium, some metal deposits may coexist with them. Uranium is a radioactive element, with its existence, there is radium, radium decay products - radon and radon progeny will continue to be produced. therefore,