The Dahuabei granitoid intrusion in the Wulashan area, Inner Mongolia in the west part of the northern marginal zone of the North China craton, is spatially associated with gold mineralization. The large-scale Hadamengou gold deposit, characterized by gold-bearing K-feldspar-quartz veins, occurs immediately to the east of the intrusion. Therefore, some researchers thought that they also have temporal and genetic links. The Dahuabei granitoid batholith with an outcrop area of 172 km2 intruded into the Archaean metamorphic rock of the Wulashan Group. The intrusion can be divided into two lithofacies, the medium-coarse-grained central fades and medium-fine-grained marginal facies, and there is a gradational boundary between the two facies. Petrological and geochemical studies suggest that the Dahuabei plutonic intrusion is mainly biotite monzonitic granite, with a mixed origin of crustal and mantle sources. In this study, one sample from the central lithofacies of the Dahuabei pluton was analyzed for U-Pb in zircon using the advanced Sensitive High-Resolution Ion Mi-croprobe (SHRIMP) technique. The analytical result suggests that the Dahuabei granitoid intrusion was formed at 353. 7 Ma i. e. , the early Hercynian epoch. However, the age of the gold mineralization in the area, given by alteration minerals such as sericite and K-feldspar from the Hadamengou gold deposit, ranges from 276 Ma to 139 Ma. These data indicate that the gold mineralization in the area is at least 70 Ma younger than the Dahuabei intrusion. This rules out the possibility of a direct genetic link between gold mineralization and the granitoid intrusion. Furthermore, the age of the Dahuabei granitoid pluton situated in the south of the collision zone between the Angara block and the North China craton provides reliable chronological evidence for the collision , which is believed to take place at the end of the Devonian.