张海东;高海龙;刘建朝;张苏楠;彭素霞;王瑞美;吴继莲;黄水文;

• 1:长安大学资源学院
• 2:长安大学成矿作用及其动力学国土资源部开放研究实验室
• 3:内蒙古太平矿业有限公司

摘要(Abstract)：

南太行山平顺闪长岩锆石SHRIMP测年表明闪长岩体形成于(125.5±2.3)Ma,与太行山其他地区乃至整个华北地区侵入杂岩体具有相近的形成年代,表明在晚中生代(115～135Ma)太行山地区与华北地区经历了相同的构造岩浆事件。平顺闪长岩w(SiO2)=48.57%～63.54%,w(Al2O3)=13.53%～19.15%,w(MgO)=1.20%～9.31%,w(TiO2)=0.34%～1.07%,w(CaO)=3.13%～10.39%,w(K2O+Na2O)=4.78%～7.99%,Mg#=0.37～0.72,LREE富集HREE亏损,略显微弱的正Eu异常,以富集LILE、LREE元素和亏损Nb-Ta等高场强元素为特征。闪长岩(206Pb/204Pb)i=17.775～18.857,(207Pb/204Pb)i=15.522～15.602,(208Pb/204Pb)i=38.044～38.502,εNd(125Ma)=-17.009 56～-9.606 32,ISr=0.705 85～0.707 53,表明起源于EMI富集地幔,并受到地壳物质和EMII型富集地幔混染,可能说明在晚白垩世太行山地区与整个华北克拉通都发生了岩石圈减薄事件。

关键词(KeyWords)： 平顺闪长岩体;南太行山;EMI;岩石圈减薄

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41040020;41073027);; 中国地质调查局项目(1212011121076);; 中央高校基金项目(CHD2011ZY005;CHD2011JC168)

作者(Author): 张海东;高海龙;刘建朝;张苏楠;彭素霞;王瑞美;吴继莲;黄水文;

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