Late Mesozoic Intracontinental Deformation in the Northern Margin of the North China Craton: A Case Study From the Shangyi Basin, Northwestern Hebei Province, China

During the late Mesozoic, East Asian continent underwent a complex tectonic history due to multiple episodes of plate convergence. How crust responds convergence in North China Craton (NCC) remains unclear. Here we undertook field geological investigations and fault-slip vectors analysis Shangyi Basin western Yanshan fold thrust belt, northern margin NCC. Combined with new geochronological data, delineate three phases intracontinental deformation area: 1 ) NW-SE compression during Late Jurassic earliest Cretaceous (ca. 151–141 Ma); 2 extension middle–late Early 135–110 3 NE-SW compressional later than 110 Ma. The early controlled present bulk architecture basin, subsequent two events only caused limited reworking previous structures. Through balanced cross-section restoration, estimate horizontal shortening ratio study area is over 27% compression. Moreover, contribution from north side basin greater that south side. consistent time episode B Yanshanian movement (Yanshanian B), which may be influenced by subduction Paleo-Pacific beneath Asia closure Mongol-Okhosk Ocean. Subsequent NW–SE likely associated destruction NCC Cretaceous. Extension result roll-back post-orogenic collapse Mongol-Okhotsk belt. last event linked remote effect final collision between Qiangtang Lhasa terranes.