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内蒙古林西县北三段矿区花岗质岩石地球化学特征及构造背景

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文章导航 > 西北地质 > 2015 > 48(4): 115-124

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袁小平, 任俊霖, 孙军刚, 薛燕萍, 刘晓煌, 李保飞. 内蒙古林西县北三段矿区花岗质岩石地球化学特征及构造背景[J]. 西北地质, 2015, 48(4): 115-124.
引用本文: 袁小平, 任俊霖, 孙军刚, 薛燕萍, 刘晓煌, 李保飞. 内蒙古林西县北三段矿区花岗质岩石地球化学特征及构造背景[J]. 西北地质, 2015, 48(4): 115-124.
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YUAN Xiaoping, REN Junlin, SUN Jungang, XUE Yanping, LIU Xiaohuang, LI Baofei. The Granitic Rocks' Geochemistry and Tectonic Setting of the Beisanduan Mining Area in Linxi County, Inner Mongolia[J]. Northwestern Geology, 2015, 48(4): 115-124.
Citation: YUAN Xiaoping, REN Junlin, SUN Jungang, XUE Yanping, LIU Xiaohuang, LI Baofei. The Granitic Rocks' Geochemistry and Tectonic Setting of the Beisanduan Mining Area in Linxi County, Inner Mongolia[J]. Northwestern Geology, 2015, 48(4): 115-124.
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内蒙古林西县北三段矿区花岗质岩石地球化学特征及构造背景

  • 1.

    华北地质勘查局五一四地质大队, 河北承德 067000

  • 2.

    中国人民武装警察部队黄金第七支队, 山东烟台 264004

  • 3.

    中国人民武装警察部队黄金指挥部, 北京 100010

  • 4.

    中国人民武装警察部队黄金第七支队, 山东烟台 264004;中国地质大学(北京), 北京 100083

  • 基金项目: 中国有色金属建设股份有限公司招标项目"内蒙古自治区林西县北三段银铅多金属矿普查"(NFCCF201002)

The Granitic Rocks' Geochemistry and Tectonic Setting of the Beisanduan Mining Area in Linxi County, Inner Mongolia

  • 1.

    514 Brigada of North China Geological Exploration Bureau, Chengde 067000, Hebei, China

  • 2.

    The 7th Gold Detachment of Chinese Armed Police Force, Yantai 264004, Shandong, China

  • 3.

    The Gold Command of Chinese Armed Police Force, Beijing 100010, China

  • 4.

    The 7th Gold Detachment of Chinese Armed Police Force, Yantai 264004, Shandong, China;China University of Geosciences, Beijing 100083, China

    摘要
  • 内蒙古北三段矿区处在华北地台北缘,区内有较多金及多金属矿床,具有良好的区域成矿条件。矿区内晚侏罗世侵入岩以花岗岩、花岗斑岩和石英闪长玢岩为主,具有高K和富碱的特点。通过将北三段矿区花岗岩的地球化学数据与国内外不同类型的花岗岩进行对比,判定北三段矿区花岗岩属于A型花岗岩,具有富Si、富碱、贫Mg的特点,Sr、P、Eu、Ti出现低谷,其稀土配分模式曲线呈右倾型,为典型的海鸥式。该类花岗岩可能是在造山运动完成后,岩石圈的伸展减薄环境中形成的。在岩石圈伸展减薄该过程中,局部压力的降低和软流圈的上涌对造成了地壳的部分熔融,从而为花岗岩的形成提供了条件。
    The Beisanduan mining area is located in the northern margin of North China platform, where has good regional metallogenetic condition. There are lots of gold deposits and other polymetallic deposits in the region. After comparing and discriminating the geochemical data of monzogranite and alkali granite in the Beisanduan mining area with the various types of graniteat home and abroad, the granite in Beisanduan mining area is classified as A type granites, which is rich in Si and alkali, and is poor in Mg. The trace elements(Sr, P, Eu and Ti) present a trough, and the REE patterns show right deviation type, with a typical style of A-typegranite.These granites may be formed in the extension and thinning environment afterorogenic movement. The reduction of local pressure and upwelling of asthenosphere have played a certain role in the partial melting of crust, providing the conditions for the formation of granite.
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出版历程
收稿日期:  2015-05-06
修回日期:  2015-08-10
刊出日期:  2015-12-15

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