Silicic melt obtained from the melting experiments of mantle peridotite reacted 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, having 67-68 wt% SiO₂. On the other hand, the quenched glasses obtained at 1050℃ are andesitic in composition, 61-64 wt% SiO₂. This suggests that calk-alkaline dacites to andesites can be generated by the reaction of slab melts with mantle peridotite.