| 内蒙古锡林郭勒盟多伦地区张家口组首次发现的碱性火山岩及其地质意义 |
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| 关键词:alkali volcanic rock aegirine aegirine-pyroxene Zhangjiakou Formation Duolun in Xilin Gol League |
| 基金项目:国家计委科研专项（地科专96-02）“锡盟多伦地区金属成矿地质条件；远景预测”中的部分成果,得到国家地质调查项目（编号：K1.3.32） |
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| Discovery of Alkali Volcanic Rocks in the Zhangjiakou Formation of the Duolun Area, Inner Mongolia, and Its Geological Significance |
| The Zhangjiakou Formation is located along the northern margin of the North China Craton and is mainly composed of volcano-sedimentary rocks. Its formation time has been considered to be Late Jurassic. Recently, some kinds of alkali volcanic rocks were discovered in Zhangjiakou Formation of Duolun area, Inner Mongolia. They contain nepheline(?), aegirine, aegirine-pyroxene, magnesioriebeckite, albite, sanidine and anorthoclase, being quite similar in petrography and mineral association to rocks of Duolun Formation in the same area, which has been considered to be formed in Cretaceous. The discovery of the alkali volcanic rocks in Zhangjia- kou Formation not only enriches rock types but also provides new data for the study of the tectonic environment and evolution of Duolun area. |
| LIU Yan,HAUNG Zeng-fang,ZHANG De-quan,LI Da-xin,NIE Feng-jun.2005.Discovery of Alkali Volcanic Rocks in the Zhangjiakou Formation of the Duolun Area, Inner Mongolia, and Its Geological Significance[J].Acta Geoscientica Sinica,26(6):541-546. |
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