Pb–Sr–Nd isotope constraints on the fluid source of the Dahu Au–Mo deposit in Qinling Orogen, central China, and implication for Triassic tectonic setting

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

“…7a; Huang and Wu, 1990;Zhang and Li, 1998;Xu et al, 2009a;Ni et al, 2012). These geochemical data suggest that the mantle-derived magmas must have been involved in the petrogenesis of the granites.…”

Petrogenesis of the early Cretaceous intermediate and felsic intrusions at the southern margin of the North China Craton: Implications for crust–mantle interaction

“…Another widespread lithologic unit in the region is the Xiong'er Group that formed at 1.75 to 1.80 Ga (Zhao et al, 2004). The TSM syenogranite has similar initial 87 Sr/ 86 Sr values to those of the amphibolites of the Taihua Group at 120 Ma (Ni et al, 2012;X.S. Xu et al, 2009) and those of the volcanic rocks from the Xiong'er Group (He et al, 2010;Peng et al, 2008;Wang et al, 2010), but lower than those of the gneiss and quartz schists from the Taihua Group (Huang and Wu, 1990) (Fig.…”

“…1C), intruded into the early Cretaceous Heyu granitic pluton (148-134 Ma;Gao et al, 2010;N. Li et al, 2012).…”

“…Ding et al, 2011;Gao et al, 2010;N. Li et al, 2012;Zhao et al, 2012;Zhu et al, 2013) or from the subducted Yangtze Craton (e.g.…”

“…Xu et al, 2009). Nevertheless, it remains unclear whether and to what extent mantle-derived components were involved in the petrogenesis of the granitic magmas in the southern margin of the NCC during the late Mesozoic (Ding et al, 2011;N. Li et al, 2012;Zhao et al, 2012) due to lack of evidence of contemporaneous mantle-derived magmatic activity.…”