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    秦岭造山带古生代岩浆作用及地球动力学意义

    吴元保

    吴元保, 2019. 秦岭造山带古生代岩浆作用及地球动力学意义. 地球科学, 44(12): 4173-4177. doi: 10.3799/dqkx.2019.266
    引用本文: 吴元保, 2019. 秦岭造山带古生代岩浆作用及地球动力学意义. 地球科学, 44(12): 4173-4177. doi: 10.3799/dqkx.2019.266
    Wu Yuanbao, 2019. Paleozoic Magmatism in the Qinling Orogen and Its Geodynamic Significance. Earth Science, 44(12): 4173-4177. doi: 10.3799/dqkx.2019.266
    Citation: Wu Yuanbao, 2019. Paleozoic Magmatism in the Qinling Orogen and Its Geodynamic Significance. Earth Science, 44(12): 4173-4177. doi: 10.3799/dqkx.2019.266

    秦岭造山带古生代岩浆作用及地球动力学意义

    doi: 10.3799/dqkx.2019.266
    基金项目: 

    国家“973”计划项目 2015CB856106

    详细信息
      作者简介:

      吴元保(1971—), 男, 教授, 主要从事造山带岩石地球研究

    • 中图分类号: P581

    Paleozoic Magmatism in the Qinling Orogen and Its Geodynamic Significance

    • 摘要: 秦岭造山带记录了华南华北板块聚合的完整过程.古生代岩浆岩记录了造山过程中的壳幔相互作用和造山带演化的动力学过程.古生代的中基性岩浆岩揭示了俯冲隧道内变质脱水交代岩石圈地幔过程,其中富水基性杂岩为富钾基性岩,地球化学特征显示其地幔源区经历了洋壳沉积物的交代;看丰沟岩体为高镁闪长岩,地球化学特征显示其来自经历俯冲流体交代的地幔源区.通过对古生代岩浆岩的研究发现,其具有明显的时空分布规律,它们对应于原特提斯洋俯冲、后撤、前进和回转等过程.所以壳幔相互作用发生在原特提斯洋俯冲过程中.

       

    • 图  1  秦岭-桐柏-大别造山带构造简图

      Wu and Zheng(2013)修改

      Fig.  1.  Schematic geological map of the Qinling⁃Tongbai⁃Dabie orogenic belt

      图  2  富水基性杂岩Hf⁃Nd同位素组成

      引自Wang et al.(2014)

      Fig.  2.  Hafnium vs. Nd isotope compositions for the Fushuimafic complex

      图  3  北秦岭造山带古生代构造演化

      引自Hu et al.(2019)

      Fig.  3.  Sketch model showing the Paleozoic evolution of the North Qinling orogenic belt

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    出版历程
    • 收稿日期:  2019-09-02
    • 刊出日期:  2019-12-15

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