Figure 1: (a) Tectonic subdivisions of China, showing the location of the North China Craton (after [28]). (b) Tectonic settings of the North China Craton, also showing the major gold districts in the North China Craton (after [29]). (c) Regional geological map of the Liyuan gold deposit, modified after Wang et al. [21]. “Red-circle”: Au deposit, “orange-circle”: Cu-Mo deposit, and “sky blue-circle”: Pb-Zn deposit.