Experimental petrology of reaction of mantle peridotite with slab melt

Abstract

The partial melting of depleted peridotite plus slab melt at 1.5 GPa was studied for H2O saturated conditions. The quenched glasses obtained at 1000℃ are dacitic in composition, and glasses obtained at 1050℃ are andesitic in composition. This suggests that calk-alkaline dacites to andesites can be generated by the reaction of slab melts with mantle peridotite. Moreover, this suggests that calk-alkaline dacites to andesites can be formed by direct partial melting of the hydrous upper mantle contaminated with slab melts.