The backbone-like tonalite-trondhjemite-granodiorite(TTG) in the Archean cratons is a crucia lprobe to trace regime of the continental evolution. However, marked decreases of TTG and other magmatism occurred across the Archean-Paleoproterozoic transition, along with atmospheric oxygenation and glaciations. Here we report the ca. 2.3 Ga TTG in the North China Craton, which may represent the last major global pulse of TTG. The ca. 2.3Ga TTGs were derived from partial melting of the Archean basaltic crust under low-medium pressure and high thermal gradients (up to900°C/GPa) in an intraplate setting. The crustal thickness during this time is estimated at 32–38 km, strikingly thinner than the prior Neoarchean crust of the NCC. The rocks contain the lowest-known zircon δ18O(1.24–4.39‰) and bulk-rock δ30Si values (-0.41–-0.13‰) contrast to global TTGs through time, implying high-temperature (T) hydrothermal interaction between the Archean protolith sources and meteoric water.Combing the published coeval komatiitic-gabbroic rocks, low-δ18O A-type granites, and thinning lithosphere since 2.50 Ga,we posit initial rifting within-plate. The ca. 2.3 Ga low-δ18O igneous rocks and coeval magmatism in the NCC may reveal a consistent early Paleoproterozoic interval of low-δ18O magmatism and coincided with intraplate rifting prior to the breakup of Archean cratons/supercratons, plausibly hinting onset of the Paleoproterozoic supercontinent cycle. The low-δ18O magmatism coincident with the Huronian glaciation could represent positive feedback loops for paleoclimate changes.