摘要
阿力格亚地区位于兴安地块与松嫩地块晚古生代拼合带附近,总体为北东向展布的岩浆—构造活动带。通过对区内晚石炭世细粒二长花岗岩、中细粒二长花岗岩的岩石矿物学、岩石化学和地球化学特征等的研究,讨论了岩石成因和构造环境。岩石化学特征表明,该期花岗岩岩石成因为S型花岗岩,主要由壳源物质重熔而成;稀土和微量元素特征显示,稀土元素总量偏低,属轻稀土富集型;岩石富集大离子亲石元素Rb、Th、Ba、U,而Sr、Y、Yb、Lu相对于亏损。根据岩石学、地球化学研究结果,综合分析认为,该期花岗岩形成于兴安地块与松嫩地块接触碰撞造山过程的后碰撞环境。
Aligeya area is located in the Xingan massif and Songnen massif of Late Paleozoic collisional belt near the North East trending magmatic active tectonic belt.Based on the study of rock mineralogy,petrochemistry and geochemistry of the Late Carboniferous fine grained monzonitic granite and medium-fine grained monzonitic granite,the petrogenesis and tectonic setting are discussed.Show that the chemical characteristics of rocks,granite as S type granite,mainly by crustal material and remelting;show the features of REE and trace elements,REE is low,LREE enrichment;the rocks are enriched in large ion lithophile elements Rb,Th,Ba,U,and compared with the loss of Sr,Y,Yb,Lu.Based on the petrological and geochemical findings,it is considered that the granites formed in the post collisional environment of the collision between the Xingan massif and the Songnen massif.
作者
王国君
WANG Guo-jun(Liaoning Nonferrous Geological Exploration Institute Co.,Ltd.,Shenyang 110013,China)
出处
《有色矿冶》
2018年第6期6-11,18,共7页
Non-Ferrous Mining and Metallurgy
基金
中国地质调查局地质调查项目(1212011220426)
