Juvenile vs. recycled crust in NE China: Zircon U–Pb geochronology, Hf isotope and an integrated model for Mesozoic gold mineralization in the Jiaodong Peninsula

Anatomy of zircon growth in high pressure granulites: SIMS U–Pb geochronology and Lu–Hf isotopes from the Jiaobei Terrane, eastern North China Craton

“…These serpentinized ultramafic rocks, though pervasive in this area, are rare in other parts of the NCC where granulite facies rocks outcrop. The Mesozoic rocks, including granitic intrusions and some volcanic and sedimentary successions, intruded into or cover the Precambrian basement rocks and correlate with similar suites and associated widespread gold metallogeny elsewhere in the eastern part of the NCC (e.g., Guo et al, 2013;Goldfarb and Santosh, 2014;Yang et al, 2014). A zircon Lu-Hf isotopic study of the Mesozoic granitoids from the Jiaobei Terrane yielded Hf model ages (T DM2 ) mainly between 2.1 and 2.9 Ga (Yang et al, 2012).…”

Petrogenesis of the early Cretaceous Funiushan granites on the southern margin of the North China Craton: Implications for the Mesozoic geological evolution

“…They are coeval with the widespread early Cretaceous granites in the NCC, that were probably formed under lower pressure due to intracontinental extension and lithospheric thinning occurred in the whole eastern China (e.g. Jahn et al, 1999;Zhao et al, 2004bZhao et al, , 2007bXie et al, 2006;Yang et al, 2008Yang et al, , 2014Guo et al, 2013;Tang et al, 2013;Zhai and Santosh, 2013;Goldfarb and Santosh, 2014).…”

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

“…Likewise, Mesozoic granites elsewhere in the East Qinling orogen also have ε Nd (t) and ε Hf (t) values similar to the granite porphyries in the Luanchuan ore field, and they have T DM2 (Nd) ages ranging from 1.8 to 2.5 Ga Wei et al, 2010;Yao et al, 2009), also younger than the Taihua Group. Nevertheless, unlike the granite porphyries in the Luanchuan ore field, Mesozoic granites elsewhere in the eastern part of the North China Craton have relatively restricted whole-rock ε Nd (t) and zircon ε Hf (t) values for individual plutons, and have older zircon T DM2 (Hf) ages (2.5 to 2.7 Ga) and ubiquitously contain~2.5 Ga inherited zircons (Jiang et al, 2013;Yang et al, 2013). Therefore, it is unlikely that the granite porphyries in the Luanchuan ore field formed from remelting of the Taihua Group (Chen et al, 2000;Lu et al, 2002;Yang et al, 2010).…”

“…Mesozoic mafic rocks, including the mafic dikes in the Luanchuan ore field and those in the southern and southeastern margins of the North China Craton have arc-like trace element signatures and high initial Sr isotopic ratios and negative ε Nd (t) values, indicating that they may have derived from enriched mantle sources (Yang et al, 2012b and references therein). The enriched mantle sources may have been generated by metasomatism of the overlying lithospheric mantle of the North China Craton by melts and/or fluids derived from the subducted Yangtze Block during the Triassic continental collision (e.g., Xu et al, 2004;Yang et al, 2012bYang et al, , 2012cYang et al, , 2013Zheng et al, 2012b). The delaminated lower continental crust of the North China Craton might also have contributed to the mantle enrichment Yang et al, 2012c).…”