冀东青龙太古宙花岗岩系地质地球化学特征  

THE GEOLOGY AND GEOCHEMISTRY OF THEARCHEAN GRANITOIDS IN QINGLONG,EAST HEBEI

作　　者：肖龙[1] 欧阳成甫[1] 汪劲草[1] 

机构地区：[1]桂林工学院资源工程系,中国有色金属工业总公司矿产地质研究院

出　　处：《桂林冶金地质学院学报》1994年第4期380-386,共7页

摘　　要：冀东青龙太古宙花岗岩系由紫苏花岗岩类－花岗闪长岩－英云闪长岩组成，属于钙碱性铝正常型花岗岩．其微量元素Ｒｂ，Ｓｒ，Ｂａ，Ｎｂ，Ｚｒ低于一般花岗岩，Ｔｉ和Ｃｒ高于一般花岗岩．轻重稀土分馏明显，∑ＲＥＥ及Ｃｅ，Ｙ低于一般花岗岩，δＥｕ＝１．０３～１．４１，花岗岩系为中晚太古宙下地壳深融产物，属Ｓ型花岗岩，其侵位后遭受过变形变质．The Archean granitoids in Qinglong,East Hebei consist of charnockitoid,granodioriteand tonalite.They are caf-alkaline granitoids,and their compostions can be comparable withTTG magma.Comparing with ordinary granite,the concentration of Rb,Sr,Ba,Nb and Zr islower,whereas that of Ti and Cr is higher.(Ce/Yb)N=8～24.The concentration of ∑REEand Ce,Y is lower than that of ordinary granite.δEu=1.03～1.41.The granitoids are generated in the lower crust by anatexis in middle-lower Archean.It shows the characteristics ofS-type granitoids.

关 键 词：紫苏花岗岩 花岗闪长岩 地球化学 花岗岩 

分 类 号：P588.121[天文地球—岩石学]