摘要
Abstract
There are quartz diorite, biotite granodiorite and biotite adamellite in Nanhalahezi. The anlysis on U-Pb age testing and lithogeochemistry of zircon showed that the quartz diorite, biotite granodiorite and biotite adamellite were formed at Early Jurassic. The increase of SiO2 content result in the decline of Fe2O3,FeO,MgO,Al2O3, MnO, CaO, TiO2 ,and the increase of K2O.At the same time, Rb,U,Th and K elements are rich ,but the Nb,Ti,P elements are lose. The total quantity of light and heavy rare earth are gradually increase. The Eu elements are vary from no abnormalities to weak and strong negative anomaly. The formation of “I” granite were caused by pacific plate subducting to eurasian plate.关键词
早侏罗世花岗岩/锆石U-Pb年龄/岩石地球化学/构造环境Key words
early Jurassic granite/U-Pb age of zircon/lithogeochemistry/structural environment分类
天文与地球科学
