摘要
应用地质地球化学方法对胶东东部昆嵛山复式花岗岩的研究结果表明,该花岗岩体为壳源型花岗岩,是由胶东群、荆山群变质岩系经原地、半原地混合交代作用以及局部重熔作用形成。依据岩体中包体岩石类型的空间组合分带规律,将昆嵛山岩体划分为JDγ型花岗岩和JSγ型花岗岩;并通过研究该两类型花岗岩的岩石化学成份及微量元素特征证明:JDγ型花岗岩的源岩为胶东群,而JSγ型花岗岩的源岩为荆山群。
Kunyushan granite is located in the east Shandong Precambrian shield. The results of the study by various geological and geochemical methods indicate that the granite is crustal type resulting from autochthonous and subautochthonous migmatization and local anatexis of metamorphic rocks of Jiaodong group and Jingshan group. According to spatial distribution of the enclaves in the granite, Kunyushan granite can be classified into two types: JDγ-granite and JSγ-granite. The characteristic of petrochemistry composition and trace element content of the granite shows that the original rock of JDγ-granite is Jiaodong group metamorphic rocks and the original rock of JSγ-granite is Jingshan group metamorphic rocks.
关键词
花岗岩
地质
地球化学
成因
complex granites,original rock,migmatization,local anatexis
