Ca. 1318 Ma A-type granite on the northern margin of the North China Craton: Implications for intraplate extension of the Columbia supercontinent

Discovery of Mesoproterozoic kimberlite from Dörbed Banner, Inner Mongolia and its tectonic significance

“…Development of Longtou Shan Mesoproterozoic kimberlite suggests that a lithosphere thicker than 150 km existed in the Bayan Obo region during the Proterozoic and that the NCC and the Northern ancient craton had not started rifting at that time (1,552 Ma). The Bayan Obo developing at the northern margin of the NCC could be taken as a proof that the NCC rifted from the Columbia supercontinent and formed an ocean basin along Bayan Obo Aulacogen in 1,350–1,320 Ma (e.g., Li et al, ; Shi et al, ; Yang, Fan, Santosh, Hu, & Wang, ; Zhang et al, ; Zhang et al, ; Wang et al, ), perhaps even at 1.3–1.2 Ga (e.g., Hou, Santosh, Qian, Lister, & Li, ; Liu, Zhao, & Liu, ; Rogers & Santosh, ; Santosh, Maruyama, & Yamamoto, ; Wang, Zhou, Zhao, Chen, & Yan, ; Zhai, ; Zhao et al, ). If this was the case, the concept of “Bayan Obo Aulacogen” is not suitable for Bayan Obo Group's geological background.…”

Age and geochemistry of the early Mesoproterozoic A-type granites in the southern margin of the North China Craton: Constraints on their petrogenesis and tectonic implications

“…1.37 Ga K-bentonite beds in the Xiamaling Formation near Beijing (Gao et al, 2008a), 1.35-1.31 Ga diabase sills in the Chaoyang area and bimodal magmatism in the Yanliao and Huade areas (Zhang et al, , 2012b and ca. 1.31 Ga anorogenic A-type granites in the Jining area (Shi et al, 2012) of Inner Mongolia, are newly recognized in the northern NCC. In addition, other Mesoproterozoic magmatic events that have been reported in the NCC include the ca.…”

Chapter 2 Classification of basins, with special reference to Proterozoic examples

“…Different portions of the NCC experienced distinct tectonosedimentary evolution during the period from the late Palaeoproterozoic to middle Mesoproterozoic (Lu et al 2008). The upper Mesoproterozoic is missing, although extension-related magmatism took place in the northern NCC in the time interval from 1.35 to 1.32 Ga (Zhang et al 2009;Shi et al 2012). The Neoproterozoic strata are preserved in a few localities along the NCC southern and northern margins, but it remains unclear what the tectonic settings were for the Neoproterozoic deposits.…”