The Late Triassic and Late Jurassic stress fields and tectonic transmission of North China craton

Petrogenesis of the Mesozoic granites and Mo mineralization of the Luanchuan ore field in the East Qinling Mo mineralization belt, Central China

“…Emplacement of granite plutons and associated Mo mineralization in the East Qinling Mo mineralization belt were considered to be related to the switch of geodynamic regimes in the Late Mesozoic in East China due to a shift from oblique, shallow subduction of the Izanagi Plate to orthogonal, steep subduction of the Paleo-Pacific Plate, leading to the lithospheric thinning of the North China Craton (Hou et al, 2010;Sun et al, 2007;Wu et al, 2008;Zhu et al, 2010b). In this fashion, the Jurassic to Early Cretaceous (N 131 Ma) granites are considered to be related to the transformation of the tectonic regime from NS-to nearly EWdirections in East China, i.e., a continental margin arc setting controlled by the subduction of the Izanagi or Paleo-Pacific plate beneath the Eurasian continent in a WNW-ESE direction in the Late Jurassic-Early Cretaceous, whereas the emplacement of younger granites (b131 Ma) can be ascribed to large-scale lithospheric thinning beneath the North China Craton Li et al, 2005Li et al, , 2013aMao et al, 2005Mao et al, , 2008Mao et al, , 2010Zhang et al, 2010).…”

Joint development and tectonic stress field evolution in the southeastern Mesozoic Ordos Basin, west part of North China

“…During Late Triassic times, the Qinling Ocean was closed along the south boundary of the Qinling Microcontinent (Hacker et al, 2004), which is located at the southern margin of the Ordos Basin: this is caused by the convergence between the South China Block (SCB) and NCB (Wan and Zhu, 2002;Wang et al, 2006;Dong et al, 2008;Ritts et al, 2009;Hou et al, 2010). Meanwhile, the lack of Late Triassic to Early Jurassic strata in the southwest margin of the basin shows that the southwest margin of the basin is affected by NE-SW-trending remote compressive stress, which is related to the Qiangtang Block's convergence towards the Qaidam massif, and the formation of the Songpan-Ganzi fold belt Dong et al, 2008;Ritts et al, 2009).…”

Late Mesozoic time constraints on tectonic changes of the Luanchuan Mo belt, East Qinling orogen, Central China

“…10A, B). However, a new model for this transformation in the Jurassic has been proposed, NW-trending movement of the Izanagi plate (Hou et al, 2010;Mao et al, 2011), westward motion and collision of Okhotsk plate, caused 20-30 • counterclockwise rotation of the eastern Asian continental crust, leading to relative eastward motion of crust below eastern China (Wan, 2004;Wan et al, 2008).…”