Abstract Tectonic overprinting from distinct orogenic events at adjacent plate margins critically governs the mountain building in overriding continent. The northern North China Block (NCB) records Triassic accretionary orogenic event from Paleo‐Asian Ocean (PAO) closure and Mongol‐Okhotsk Ocean (MOO) subduction, while its southern margin experienced Paleo‐Tethys closure and deep continental subduction. As an interference zone, the Triassic accretionary orogen along the northern NCB holds significant documents for understanding the role of tectonic overprinting in mountain building under bidirectional convergence. To resolve persistent controversies over Triassic orogenic orogenic events and driving mechanisms, we integrate stratigraphic, growth‐strata, and provenance analyses of the Xiabancheng basin with regional syntheses of deformation, sedimentation, and magmatism. Syntectonic deposition reveals that the Triassic Xiabancheng basin represents flexural basin that underwent two episodes of crustal contraction (ca. 242–232 Ma and ca. 217–198 Ma). Three orogenic stages (a) Early Middle Triassic (ca. 252–230 Ma) N‐S contractional structures accompanied by magmatic reduction and lull, recording the syn‐orogen stage with gradual closure of the PAO; (b) Early Late Triassic (ca. 230–215 Ma) magmatic flare‐up with mafic–ultramafic rocks and local extensions, reflecting superimposition of post‐orogenic collapse and back‐arc extension by MOO subduction; (c) Late Late Triassic to earliest Jurassic (ca. 215–195 Ma) widespread crustal contraction characterized by north‐vergent back‐thrusting, with waning magmatism, recording the tectonic overprinting on post‐orogenic collapse from the South China Block‐NCB collision and continued MOO subduction. The northern NCB exemplifies tectonic overprinting by discrete orogenic processes, underscoring the pivotal roles of far‐field stress transmission, pre‐existing lithospheric architecture, and rheological heterogeneity in enabling orogenic superimposition.
Lin et al. (Sun,) studied this question.