Magmatic records of subduction and closure of the Meso-Tethys Ocean in the northern-central Tibetan Plateau

The evolution of the Tethys Ocean has received much research attention; however, timing and subduction mechanisms involved in closure Bangong-Nujiang Meso-Tethys remain poorly constrained. In this study, we present geological, geochronological, geochemical, zircon isotopic data from Cretaceous magmatic rocks combine these with previously published within central suture zone north-central Tibetan Plateau. integrated update regional tectonic framework enable a comprehensive geodynamic model to be developed for ocean events. detail, temporal spatial variations Jurassic−Cretaceous magmatism reflect influence northward Dongqiao-Amdo oceanic basin bidirectional crust. further initial intra-ocean subduction, slab rollback, flat as evidenced by two phases north-south migration at ca. 190−160 160−130 Ma hiatus 160−140 Ma. closed during two-stage process, including north south. soon after 180 Ma, accompanied continent-continent collision between Amdo microcontinent South Qiangtang terrane. 130−120 corresponding period waning magmatism. This represented complete caused an arc-continent collisional event involving Baingoin arc, microcontinent, Lhasa Lower terrestrial strata their basal unconformity mark final ocean, Early islands might have formed before 130