胶东东部中生代中酸性花岗杂岩形成机理  

GENETIC MECHANISM OF THE MESOZOIC INTERMEDIATE -ACIDIC GRANITIC COMPLEXES IN EASTERN JIAODONG AREA

作　　者：孙景贵[1] 刘春华[1] 郑常青[1] 

机构地区：[1]长春地质学院地球科学系

出　　处：《高校地质学报》1996年第2期207-217,共11页Geological Journal of China Universities

摘　　要：出露在胶东东部地区的中生代中酸性花岗杂岩，普遍含有大量的细粒间长岩类包体。对主体岩石和包体岩石的地质学、岩相学、地球化学以及同位素等方面的综合研究，证实这些主岩是中生代壳幔分层熔融形成的同生壳源岩浆和幔源岩浆发生混合作用形成混合岩浆，然后通过分离结晶作用形成花岗杂岩的不同类型。The Mesozoic intermediate - acidic granitic complexes exposed in eastern Jiaodong area, the eastern part of Shandong Peninsula, contain abundant inclusions of finegrained diorite. The Synthetical study on field geology, petrology, geochemistry and isotopic geology of the complexes and their inclusions suggests that they were syngenetic mantle-derived and crust--derived magmas formed by layering melting and then mixed together. During fractional crystallization, the migma produced the intermediate--acidic granitic complexes of different styles.

关 键 词：岩浆混合作用 分离结晶作用 花岗杂岩 中生代 胶东 

分 类 号：P588.36[天文地球—岩石学]