The Zaozigou gold deposit in the Western Qinling Mountains is a super-large gold deposit related to magmatic activity. The intermediate-acid intrusive rocks in the mining area are intensively developed, mainly including diorite porphyrite, biotite quartz diorite porphyrite, granite porphyry and quartz diorite. The trace elements in rocks are characterized by enrichment of large ion lithophile elements Rb and K, and depletion of high field strength elements Nb, Ta, P and Ti. On the whole, the total amount of rare earth elements in biotite quartz diorite porphyrite>diorite porphyrite>quartz diorite, diorite porphyrite, biotite quartz diorite porphyrite and granite porphyry have weak to medium negative europium anomaly (δEu=0.60～0.89), deep quartz diorite has no Eu anomaly (δEu=0.96～1.07), and "Nb-Ta valley" is deeper and obviously different from shallow vein rock. The zircon U-Pb age of quartz diorite is 230 Ma, which is 10~20 Ma later than that of shallow vein rock, and is basically consistent with the age of altered mineral sericite. It is speculated that gold mineralization may begin at 230 Ma, and the main mineralization period is 230~211 Ma. The deep quartz diorite is the metallogenic geological body of Zaozigou gold deposit.