Magmatic peridotites and pyroxenites, Andong Ultramafic Complex, Korea: Geochemical evidence for supra-subduction zone formation and extensive melt-rock interaction

► Andong Ultramafic Complex, Korea comprises peridotites, pyroxenites and lesser gabbros. ► Petrographic and chemical data indicate that mafic-ultramafic rocks are magmatic. ► Bulk rock and mineral chemistry data suggest formation in supra-subduction zone (SSZ)/arc environment. ► Peridotite bulk rock and spinel chemistry record evidence of extensive melt-rock interaction.