Abstract:Through analysis and study on tectonic geology, petrochemistry, geochronology and other geological information data of Mesozoic instrusive rocks which has relation with gold deposit in Jiaodong area, it is regarded that LinglongKunyushan granite belongs to Itype and S type granites, while Guojialing granite belongs to Itype granitoids. They have different source rocks, and the forming environments are island arc environment and the continental collision caused by oceanic crust subduction and continental margin with the property of arc extension. LinglongKunyushan granites were formed in the Jurassic, and Guojialing granites were formed in the early Cretaceous. From the concept of rock combinations, LinglongKunyushan granites should be classified as gneissic granodiorite combination in early LinglongKunyushan orogenic period; while Guojialing granite should be classified as weak gneissic granodiorite granite combination in middle Guojialing orogenic period.
