青田复式岩体──两种不同类型花岗岩的复合

Qingtian composite body──the coexisting of two different types of granites

浙江青田复式岩体由燕山晚期钙碱性花岗岩和碱性花岗岩复合而成。两类花岗岩在岩石学、岩石化学、地球化学等特征方面均有明显区别。野外地质、岩石化学、微量元素、稀土元素及同位素等资料证实钙碱性花岗岩属Ⅰ型花岗岩，碱性花岗岩属典型的Ａ型花岗岩，是浙闽沿海碱性花岗岩带中新发现的一个成员。两类花岗岩的物质来源不同，但又有密切的成因联系。这种空间上的复合，在浙闽沿海碱性花岗岩带中具有普遍的意义。

Qingtian composite body,in Zhejiang Province,is comprised of the calc-alkaline granite and the alkaline granite,which formed in Late Yanshan period.They are different with each other in their petrological and petrochemical composition,geochemical et al.Based on field work and the research on petrochemical,trace and rare earth elements,isotopic features,the cafe-alkaline granite belongs to I-type granite, and the alkaline granite is typical A-type granite. The material sources of two types of granites are different,but they are corelative in genesis.The coexisting of I-and A-types of granites has great signifcance in the study of the alkaline granite zone in the coastal area of Zhejiang-Fujian Provinces.