胶东金矿区与金矿成矿伴生的脉岩为一套高钾 -钾质脉岩。根据地质、岩相学及与金矿化的时空关系 ,将主要岩石类型划分为煌斑岩、安山玢岩、英安玢岩类 ,它们分别形成与金矿化早期、同期和晚期 ;主要元素成分以富碱高钾、低钛为特征 ,成分变异具同源岩浆结晶分异演化的一般规律 ,早期以辉石和橄榄石、中晚期以角闪石和斜长石为主的矿物相分离结晶控制岩浆的演化 ;岩石明显富 Ba、Sr、Rb、K、L REE等大离子元素、强烈亏损 Cr、Ni及相对亏损 Th、Nb、Ti、Y等高场强元素元素 ,体现初始岩浆起源于富集地幔源区 ;大量的挥发组分及强烈的富集 Ba、Sr及低的 Sr/ Nd比值 ,指示源区为以俯冲陆源沉积为主、有玄武质洋壳参与的脱水、脱气等作用交代早期地幔楔形成的富集地幔源 ,初始岩浆是在中生代印支期形成的富集地幔向燕山期亏损方向演化的特定阶段发生低程度熔融形成 (熔融程度为 6 %～ 8% ) ;就位环境的不同是导致石英脉岩型与蚀变岩型矿区脉岩成岩作用有一定差别的主要原因 The Jiaodong gold deposit is associated with the gold mineralization of the vein rock as a set of high potassium-potassic vein rocks. According to the geology, petrography and the relationship with the temporal and spatial distribution of gold mineralization, the main rock types are divided into lamprophyre, andesite and amphibolite, which form respectively with the early, middle and late stages of gold mineralization; The elemental composition is characterized by rich alkali, high potassium and low titanium, and the composition variation has the general law of the differentiation and evolution of the same magma crystals. The pyroxene and olivine are the early components of the elemental composition. Controlling the evolution of magma. The rocks are obviously enriched in large ion elements such as Ba, Sr, Rb, K and L REE, strongly depleted in Cr and Ni, and relatively depleted in high field strength elements such as Th, Nb, Ti and Y. Enrichment of mantle source area; a large number of volatile components and strong enrichment of Ba, Sr and low Sr / Nd ratio, indicating that the source area is mainly subducted terrigenous sedimentation, dewatered, degassed with basaltic oceanic crust The initial magmatism occurred in the low melting degree (6% ~ 8%) in the specific stage of the evolution of depleted mantle from the Mesozoic Indosinian to the Yanshan period. Different place environment The main cause of rock type quartz vein and altered rock mining veins Diagenesis there are some differences of