It is thought that there are no common mantle end members of EM1,EM2 and HIMU, which only occur individually at very local areas, and their source region is probably related to a transition zone between the u.
笔者认为不存在具有公共性质的EM1、EM2和HIMU地幔端员,它们的源区可能来自上、下地幔过渡带,只在局部地区出现,独一无二。