Fig. 1. Geologic map showing the location of the Huangnitian quartz syenite and the surrounding geology. 1. Cambrian Bachun group migmatite; 2. Caledonian Sanbaoshan gneissic granite; 3. Middle Jurassic Xingzhou porphyritic hornblende biotite monzonitic granite; 4. Late Jurassic (first stage) biotite granite; 5. Late Jurassic (second stage) granite porphyry; 6. Cretaceous Huangnitian hornblende quartz syenite.