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内蒙古温其根乌兰蛇绿混杂岩中枕状玄武岩特征及锆石U-Pb年龄

文章导航 > 地质通报 > 2015 > 34(10): 1878-1883

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张宏宝, 张 洋, 高 雄, 李潇泉, 张计东, 邢伟伟, 焦圣兵, 郭 彬, 刘蓓蓓, 张桂凤. 内蒙古温其根乌兰蛇绿混杂岩中枕状玄武岩特征及锆石U-Pb年龄[J]. 地质通报, 2015, 34(10): 1878-1883.
引用本文: 张宏宝, 张 洋, 高 雄, 李潇泉, 张计东, 邢伟伟, 焦圣兵, 郭 彬, 刘蓓蓓, 张桂凤. 内蒙古温其根乌兰蛇绿混杂岩中枕状玄武岩特征及锆石U-Pb年龄[J]. 地质通报, 2015, 34(10): 1878-1883.
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ZHANG Hongbao, ZHANG Yang, GAO Xiong, LI Xiaoquan, ZHANG jidong, XING Weiwei, JIAO Shengbing, GUO Bin, LIU Beibei, ZHANG Guifeng. Geological characteristics and zircon U-Pb age of pillow basalt of ophiolitic mélange in Wenqigenwulan, Inner Mongolia[J]. Geological Bulletin of China, 2015, 34(10): 1878-1883.
Citation: ZHANG Hongbao, ZHANG Yang, GAO Xiong, LI Xiaoquan, ZHANG jidong, XING Weiwei, JIAO Shengbing, GUO Bin, LIU Beibei, ZHANG Guifeng. Geological characteristics and zircon U-Pb age of pillow basalt of ophiolitic mélange in Wenqigenwulan, Inner Mongolia[J]. Geological Bulletin of China, 2015, 34(10): 1878-1883.
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内蒙古温其根乌兰蛇绿混杂岩中枕状玄武岩特征及锆石U-Pb年龄

  • 河北省区域地质矿产调查研究所,河北 廊坊 065000

Geological characteristics and zircon U-Pb age of pillow basalt of ophiolitic mélange in Wenqigenwulan, Inner Mongolia

  • Hebei Institute of Regional Geology and Mineral Survey, Langfang 065000, Hebei, China

    摘要
  • 内蒙古温其根乌兰蛇绿混杂岩是内蒙古索伦山-苏左旗-锡林浩特蛇绿岩带的西段部分，岩石组合包括枕状玄武岩、蛇纹岩、菱镁岩、硅质岩、浅变质粉砂质碎屑岩、碳酸盐岩等，岩石呈大小不等的构造岩块产出。枕状玄武岩具高Na2O、低K2O，富集Th、Ta、Nb，亏损K、Sr、Rb、Yb等元素，∑REE含量低，δEu=1.22~1.28，显示正Eu异常等大洋中脊玄武岩特征。LA-MC-ICP-MS锆石U-Pb年龄为475.8±1.6Ma，为研究华北板块北缘的大地构造演化提供了新的证据。
    The ophiolitic mélange in Wenqigenwulan lies in the western part of Solon Mountain-Sonid Left Banner-Xilin Hot zone in Inner Mongolia. The rocks consist of pillow basalt, serpentinite, magnesitite, silicalite, shallow metamorphic silty clastic rock and carbonate. The rock occurs as different sizes of tectonic blocks. Geochemistry of pillow basalt shows high Na2O, low K2O, enrichment of Th, Ta, Nb，and depletion of K, Sr, Rb, Yb. REE values are low, and δEu values vary from 1.22 to 1.28 with the features of MORB. The zircon U-Pb age is 475.8±1.6Ma. The geology and geochemistry and zircon U-Pb dating of the pillow basalt provide new evidence for the tectonic evolution at the northern edge of North China Craton.
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刊出日期:  2015-10-15

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