Timing and evolution of Jurassic–Cretaceous granitoid magmatisms in the Mongol–Okhotsk belt and adjacent areas, NE Asia: Implications for transition from contractional crustal thickening to extensional thinning and geodynamic settings

New Late Jurassic to Early Cretaceous Paleomagnetic Results From North China and Southern Mongolia and Their Implications for the Evolution of the Mongol‐Okhotsk Suture

“…The ~1587 km latitudinal plate convergence between Siberia and the AMU‐NCB probably ended by ~130 Ma (Figure a). This important event not only represents the complete closure of the Mongol‐Okhotsk Ocean to form a northeast‐trending suture, but also indicates that the intense collisional compression within the Mongol‐Okhotsk tectonic domain was beginning to transform into post‐collisional extension, which was represented by the widespread development of rift basins (Figure c; Meng et al, ; Metelkin et al, ; Y. T. Yang et al, ), post‐orogenic A‐type granitoids (Figures b and c; Sun et al, ; T. Wang et al, ) and metamorphic core complexes (Figures b and c; Daoudene et al, , ; Donskaya et al, ; Meng, ; Sklyarov et al, , ) on both sides of the MOS. The regional extension in the Mongol‐Okhotsk tectonic domain was probably related to upwelling of asthenospheric material as a result of the post orogenic collapse or delamination of a thickened crust (Figure c), as suggested by the widespread nature of A‐type volcanoplutonic rocks (Donskaya et al, ; Sun et al, ; Tang et al, ; T. Wang et al, ).…”

“…The number of the paleomagnetic sites corresponded to the poles in Table . The Late Jurassic subduction‐related volcanics in transbaikalia area, the Late Jurassic and Early Cretaceous A‐type volcanoplutonic rocks modified from Donskaya et al (), W. L. Xu et al (), and T. Wang et al (), respectively. The Early Cretaceous Metamorphic core complexes came from Donskaya et al ().…”

Superposed deformation in the Helanshan Structural Belt: Implications for Mesozoic intracontinental deformation of the North China Plate

“…Therefore, this WNW-ESE oriented shortening is largely attributed to the approximately westward subduction of the Paleo-Pacific Plate under the Eurasian Plate (Wang et al, 2011). This interpretation is also supported by Late Jurassic granitoids in North China that are related to the far-field effects of subduction of the Paleo-Pacific Plate (Wang et al, 2015). To account for the multi-directional structures and paleo-stress fields that existed during the Late Jurassic (Wong, 1929;Zhang et al, 2011), Dong et al (2007 proposed a multi-directional convergence model for the eastern Asian plate during the Mid-Late Jurassic.…”

An early extensional event of the South China Block during the Late Mesozoic recorded by the emplacement of the Late Jurassic syntectonic Hengshan Composite Granitic Massif (Hunan, SE China)

“…This event can be observed all along the East Asia continental margin of more than 5000 km, and it extends continentwards about 1000 km in South China, and even more than 2500 km in North China, Mongolia and Siberia (e.g. Zhou and Li 2000; Ren et al, 2002;Meng, 2003;Wu et al, 2005;Wang et al, 2006;Li and Li 2007;Zhang et al, 2008;Davis and Darby, 2010;Zhou et al, 2012;Dash et al, 2015;Wang et al, 2015). Due to the representatives of this tectonic event, and the related contemporary ore deposit forming processes, the Jurassic and Cretaceous tectonic regime of the South China Block (SCB) has attracted great interest in the geological community (e.g.…”