The Wulong gold deposit is one of the large magmatic hydrothermal deposits in Liaodong（eastern Liaoning） area, and its mineralization is mainly related to Mesozoic igneous rocks.In order to clarify the causes of Mesozoic igneous rocks in Wulong area, the geochemical analysis of numerous granite porphyry dykes, diorite dykes, Sanguliu pluton and zircon chronology were tested.Methods: The LA-ICPMS U-Pb dating test and analysis work was performed on the single-particle zircons.The major elements were performed by the XRF method, and trace elements were performed by ICP- MS method. Results:The chronologic results show that there are two diagenetic eras in Wulong area,i.e.the Late Jurassic and the Early Cretaceous. The near north—south trending granitic porphyry dykes in the deposit formed in the Late Jurassic (154.3±0.9 Ma~155.6±1.1 Ma), indicating that the maximum principal stress direction is near north—south in the Late Jurassic, and latest diagenetic age (116.8±0.8 Ma~117.3±0.7 Ma) of the Sanguliu intrusion rocks basically lies in the age range reported by predecessors, showing that the Sanguliu intrusion experienced a long time.Geochemistry results indicate that the magmas belonged to high- K calcium alkaline and shoshonite series are from the same arc magmatic source, and they form in subduction and extension environment in the active continental margin with the crust—mantle mixing characteristics and further evolution trend. Conclusions:Combined with ore-forming elements of different depth level indicate that the diorite is closely related to mineralization, and the deeper the metallogenic potential is greater, which has important guiding significance for prospecting prediction in the region.