惰性气体在解译地球的分异过程时是重要的示踪剂。它们证明了经强烈去气的浅地幔以及去气较轻的深部地幔的存在 ,而这二者间通过地幔柱相联。二者均包含不能由大气或地壳次生的原生Ｈｅ和太阳Ｎｅ。它们还获得了不同程度的放射成因、核成因及裂变成因同位素（４Ｈｅ ,２１Ｎｅ Inert gases are important tracer when interpreting the earth’s differentiation process. They demonstrate the existence of the strongly depleted shallow mantle and the less degassing deep mantle, both of which are linked by mantle plumes. Both contain the native He and the Sun Ne, which can not be secondary to the atmosphere or crust. They also received varying degrees of radiological causes, nuclear causes, and fissiongenic isotopes (4He, 21Ne