摘要
基于系统的野外调查,选取古元古代8个黑云母二长花岗岩和2个二云母二长花岗岩进行地球化学和成因研究。主量元素特征显示,二者均属于铝过饱和型钙碱性岩浆系列;稀土元素特征显示,成岩物质来源于上地壳,配分曲线为铕具中弱负异常的轻稀土富集重稀土亏损型特征;微量元素特征显示,岩石具有大离子亲石元素富集及成岩物质来源于壳源的特征。相关数据投图表明,黑云母(二云母)二长花岗属于同碰撞主造山期向晚造山期过渡环境下的产生的S(I)型花岗岩。
Based on systematic field investigation,eight biotite monzonitic granites and two bimica monzonitic granites of paleoproterozoic are selected for geochemical and genetic studies.The characteristics of major elements show that both of them belong to the supersaturated calc-alkaline magma series of aluminium;the characteristics of rare earth elements show that the diagenetic materials originate from the upper crust,and the distribution curve shows that Europium has the characteristics of light rare earth enrichment and heavy rare earth depletion with medium-weak negative anomalies;the characteristics of trace elements show that the rocks are rich in large ion lithophile elements and diagenetic.Material originates from the characteristics of crustal sources.The mapping data show that biotite(mica)monzonitic granite belongs to S(I)type granite produced in the transitional environment from syncollisional main orogenic period to late orogenic period.
作者
武悦
WU Yue(Liaoning Geological Exploration Mining Group Co.LTD.,Shenyang 110013,China)
出处
《有色矿冶》
2018年第6期12-15,45,共5页
Non-Ferrous Mining and Metallurgy
基金
中国地质调查局基金项目(DD20160049)
关键词
古元古代花岗岩
地球化学特征
成因
辽东
paleoproterozoic granite
geochemical characteristics
genesis
eastern Liaoning province
