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内蒙古哈达庙地区位于华北板块北缘，本文对区内花岗斑岩和闪长岩进行了锆石SHRIMP U-Pb 定年，其形成年龄分别为271±3Ma 和 267±3Ma。花岗斑岩具有高的SiO2含量（均值75.11%）、较高的K2O含量（均值5.06%）、低的MgO含量（均值0.43%）及低的Cr（均值6.70×10-6）、Ni（均值5.15×10-6）和V（均值26.86×10-6）含量，闪长岩与花岗斑岩相比具有...
东昆仑造山带白日其利镁铁质岩墙群以苏长辉长岩为主,含少量含斑辉绿岩,LA-ICP-MS锆石U-Pb年代学指示该套岩墙群结晶侵位年龄为251±2Ma。岩石具有中等的Mg# (31~50)和高铝 (16.25%~19.49%)的特征,整体属于钙碱性玄武岩系列岩石 (Na2O+K2O=2.75%~3.51%; FeOT/MgO=1.02~2.22);微量和稀土元素方面,岩石具有较低的稀土总量、轻稀土轻微...
Elemental and Sr-Nd-Pb isotopic compositions of late Cenozoic Abaga basalts, Inner Mongolia: Implications for petrogenesis and mantle process
geochronology geochemistry Abaga basalts late Cenozoic Inner Mongolia
2008/8/10
The Abaga volcanic field is one of the largest and least known areas of late Cenozoic intraplate igneous activities in eastern China. Twenty-seven Abaga basaltic rocks were analyzed for major and trac...