Triassic alkaline magmatism of the Hawasina Nappes: Post-breakup melting of the Oman lithospheric mantle modified by the Permian Neotethyan Plume

► Triassic lavas from Hawasina Nappes are mainly alkali basalts and trachybasalts. ► They derive from low-degree melting of an enriched OIB-type mantle source. > Geochemical features are remarkably similar to those of their Permian ancestors. ► The lithospheric mantle metasomatized by Permian plume-related melts is involved. ► Petrogenesis is tentatively related to post-breakup remobilization of the Oman margin.