Zagros ophiolites represent remnants of the Neo-Tethyan Ocean, which are distributed within the Alpine-Himalayan orogenic belt. The Dalampar ophiolitic mélange is a part of the Late Cretaceous Zagros ophiolitic belt located in western Azerbaijan, close to the borders of Turkey and Iraq. The Dalampar ophiolitic mélange consists of fragmented lithological units, mainly including mantle harzburgites, intrusive gabbros and gabbrodiorites, and andesitic lava flows. Geochemical results indicate a petrogenetic evolution from fore-arc basalt- to calc-alkaline- to boninitic-like affinities. The inception of Neo-Tethyan subduction led to the formation of a slightly metasomatized lithospheric mantle and residual depleted harzburgites. Melting of this metasomatized mantle produced fore-arc basalt-like gabbros. The later subduction stage was accompanied by increased infiltration of slab-derived components into the overlying mantle wedge, which led to the formation of the calc-alkaline-like gabbroic and andesitic lavas. The new zircon U-Pb geochronology of calc-alkaline-like gabbros shows that the true subduction occurred at ca. 70 Ma. Finally, the slab rollback and arc-wedge asthenospheric corner flow caused advanced degrees of shallow partial melting (~ 40-45%), ultra-depleted harzburgite residues, and boninitic-like melt extraction. Consequently, the Dalampar ophiolitic mélange was formed in an intra-oceanic subduction system that evolved from a proto fore-arc to an expansion fore-arc basin in the southern branch of the Neo-Tethyan Ocean at the northern margin of the Arabian plate.