The intrusions in the mining area are mainly represented by the Late Jurassic Wulong gneissic two-mica granite that has a SHRIMP zircon U-Pb age of 163 ± 7 Ma (Fig. 3A-C; Wu et al., 2005a), the Early Cretaceous Sanguliu granodiorite stock that yields a zircon U-Pb age of 129 ±...