Geochemical distinction between altered oceanic basalt- and seafloor sediment-derived fluids in the mantle source of mafic igneous rocks in southwestern Tianshan, western China

The role of subducting oceanic crust-derived fluids in generating mafic arc magmatism has been widely documented. However, the subducting oceanic crust is generally composed of basaltic igneous crust and seafloor sediment, which may give rise to different compositions of liquid phases causing metasomatism of the mantle wedge. Because of the similarity in enrichment of fluid-mobile incompatible ele...