Low‐Degree Melt Metasomatic Origin of Global Upper Mantle Fe Isotope Fractionation

Abstract

Low-degree melt mantle metasomatism has been a long-held concept used to explain the incompatible element enriched characteristics of mantle-derived rocks, such as ocean island basalts (OIB), enriched mid-ocean ridge basalts (E-MORB) and continental alkali basalts (CAB) (e.g.,