Oxidization of the mantle caused by sediment recycling may contribute to the formation of iron-rich mantle melts

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2020,（7）
• 页码范围: 519-521
• 页数: 3页
• 语种: 英文

摘要

Mantle-derived primary magmas generally have FeOtot contents of about 11 wt％.However,some primary melts show extremely high FeOtot (＞13 wt％) with high MgO (＞1 2 wt％) (ferropicrite) [1].Considering the influence of chemical and mineral compositions of the mantle source on melt compositions,it has been argued that ferropicrites may be near-primary partial melts of pyroxenite formed in the convecting mantle [2-4],whereas others favor an origin by partial melting of an iron-rich peridotitic mantle source [5,6].