Geochemistry and geochronology of the ∼0.82 Ga high–Mg gabbroic dykes from the Quanji Massif, southeast Tarim Block, NW China: Implications for the Rodinia supercontinent assembly

•∼0.82Ga high-Mg gabbroic dykes from the Quanji Massif, NW China.•The magmas derived from a depleted mantle source and emplaced in a back–arc setting.•The assembly of the Rodinia supercontinent continued until middle Neoproterozoic.