The Jinchangyu gold deposit in eastern Hebei Province is considered to be related to the Qingshankou granodiorite intrusive. However, the Yaolingzi granodiorite intrusive is less studied in spite of closing to the mining area. Due to the great similarity between the two intrusives in lithology and tectonic setting, it is necessary to discuss the possible reasons for the difference in metallogenic conditions and metallogenic potential.Methods:Based on detailed field observations of Yaolingzi and Qingshankou intrusives, the methods of transmitted light, cathodoluminescence (CL) image, crystal morphology and statistical analysis were used for granodiorite and monzogranite so as to explain conditions of magmatism. The U- Pb isotopic dating by LA- ICP- MS was conducted for the granodiorite in order to determine the igneous intrusion age. Moreover, rare earth element (REEs) geochemistry of zircons was conducted for granodiorite and monzogranite for discussing magmatism, mineralization and tectonic background in the region.Results:The results show that the formation temperature of the two zircons are 650~800℃ and 650~850℃, respectively. The crystallization age of granodiorite from Yaolingzi is 161.5±0.9 Ma. Obvious mafic microgranular enclaves are found in the two intrusives in the field. The REEs geochemical features of the two intrusives show that LREE is relatively depleted while HREE is relatively enriched with obvious positive Ce anomaly and negative Eu anomaly at the same time.Conclusions:Large amount of magmatic water and alkaline- riched environment may be the necessary conditions for the Qingshankou intrusive mineralization. The ore- forming features of granodiorite as well as crystallization age in Yaolingzi area are similar to the diorite in Yuerya gold deposit area. Therefore, we consider that granodiorite intrusive in Yaolingzi have great gold- forming potential. Field geological observations and REEs geochemical analysis indicate that the two intrusions may have experienced crust—mantle mixing. Combined with the results of Qingshankou intrusive age and tectonic background, it is suggested that the two intrusives may come from the same magmatic chamber in different stages.