Abstract: Heilangou gold deposit is located in the east of Jiaobei area,and the proven gold reserves currently account for more than 70 % of that of Penglai area.The intrusive rocks related to mineralization in this area are rich in silicon,and alkali while lacking magnesium,with TFeO(1.22 %-12.36 %,with an average of 3.38 %),and the Rb mass fraction is less than 270×10-6.The REE chondrite-normalized distribution curve has an obvious right-leaning distribution model and weak positive Eu anomaly,and the w(Rb)/w(Nb) value is 7.8-36.0,which is A-type gra-nite,with the characteristic of low-Mg adakites.The crystal ages of intrusive rocks measured by the LA-ICP-MS zircon U-Pb method are respectively(172.8±0.3)Ma,(172.8±0.4)Ma,and(174.0±0.4)Ma,which are all related to magmatic activity in the early Middle Jurassic.Heilangou gold area is mainly controlled by the lower crust and lithosp-heric mantle,and the source of ore-forming material is related to the partial melting of the crust and upwelling of lithospheric mantle and asthenosphere mantle,which belongs to the mixed material source of crust and mantle.