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 in magnesium， with TFe O (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 granite， 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 lithospheric 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.