辽宁弓长岭矿区混合花岗岩地球化学特征及成因

经分析辽宁弓长岭二矿区混合花岗岩的主量元素、微量元素和稀土元素特征，对混合花岗岩的成因研究表明: 主量元素中Fe2O3、FeO、MgO 和CaO 含量较低，K2O 和Na2O 含量较高; 微量元素分配曲线属右倾型，强不相容元素富集; 轻稀土元素分馏明显，呈明显的Eu 负异常，但Ce 的正异常不明显，为典型壳型花岗岩稀土特征。弓长岭二矿区混合花岗岩原岩为富铝的沉积岩，混合花岗岩为部分熔融成因。

Geochemical characteristics of migmatitic granite in Gongchangling iron deposit of Liaoning with discussion on their genesis

Analyzing the characteristics of major elements, trace elements and rare earth elements （REE） of migmatitic granite in the second ore district of Gongchangling iron deposit in Liaoning Province, and studying their genesis of migmatitic granite showed that the Fe203, FeO, MgO and CaO are low in contents, while Na20 and K2 O are high; the trace element spider diagram is right deviation in type, and the incompatible elements are high in conteuts. The fractionation of LREE is significantly with Eu negative animaly, while the Ce positive anomaly is not obviosly, which is similar to the REE characteristics of typical crustal granite. The original rock of magmatitic granite in Gongehangling is Al-rich sedimentary in nature, and the formation of magmatitic granite is partial melting.