Gabbro-norite cumulates from strongly depleted MORB melts in the Alpine-Apennine ophiolites

► Gabbro-norite intrusions in Alpine -Apennine ophiolites. ► Parental melts were strongly depleted asthenospheric fractional melts. ► Melt silica saturation via melt-peridotite reaction (pyroxenes' dissolution - olivine precipitation) during porous flow percolation.