In order to better understand the influence of the mantle wedge relating to subducting, the peridotites from the southern Mariana fore arc is checked in this paper.

• 弧下地幔楔是俯冲板片物质向地表折返的必经之地,对地幔楔橄榄岩的研究是研究“俯冲工厂”运行机制的重要环节。