Late Eocene magmatism of the eastern Qiangtang block (eastern Tibetan Plateau) and its geodynamic implications

[Display omitted] •The lithospheric mantle of the eastern Qiangtang block was metasomatized by subduction related fluids/melts.•Partial melting at different depths and degrees produced various parental magmas.•Magmatic recharge contributed to the wide range of ratios between highly incompatible elements.•Continental subduction of the Songpan-Ganzi block triggered crustal thickening and surface uplift.•The surface of the eastern Qiangtang block reached a moderate elevation (