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首页> 外文期刊>Journal of Asian earth sciences >Differential destruction of the North China Craton: A tectonic perspective
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Differential destruction of the North China Craton: A tectonic perspective

机译：华北克拉通的差异性破坏：构造视角

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摘要

The North China Craton (NCC) provides one of the classic examples of craton destruction, although the mechanisms and processes of its decratonization are yet to be fully understood. Here we integrate pet-rological, geochemical, geochronological and geophysical information from the NCC and conclude that the destruction of the craton involved multiple events of circum-craton subduction, which provided the driving force that destabilized mantle convection and tectonically eroded the lithospheric mantle beneath the craton. Furthermore, subducted-slab-derived fluids/melts weakened the subcontinental lithospheric mantle and facilitated thermo-mechanical and chemical erosion of the lithosphere. The more intense destruction beneath the eastern part of the NCC reflects the crucial contribution of Pacific plate subduction from the east that overprinted the mantle lithosphere modified during the early subduction processes. Our study further establishes the close relationship between lithospheric modification via peridotite-melt reactions induced by oceanic plate subduction and cratonic destruction.
机译：华北克拉通（NCC）提供了克拉通破坏的经典例子之一，尽管其克拉通化的机制和过程尚未完全了解。在这里，我们整合了来自NCC的岩石，地球化学，地球年代学和地球物理信息，并得出结论认为，克拉通的破坏涉及到环克拉通俯冲的多次事件，这提供了使地幔对流不稳定并以构造方式侵蚀岩石圈下方地幔的动力。克拉通。此外，俯冲板片衍生的流体/熔体弱化了亚大陆岩石圈地幔，并促进了岩石圈的热机械和化学侵蚀。 NCC东部下方更强烈的破坏反映了东部太平洋板块俯冲的重要贡献，该俯冲覆盖了早期俯冲过程中被修饰的地幔岩石圈。我们的研究进一步建立了由大洋板块俯冲引起的橄榄岩融化反应引起的岩石圈变质与克拉通破坏之间的密切关系。

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  • 来源
    《Journal of Asian earth sciences》 |2013年第15期|71-82|共12页
  • 作者

    Yan-Jie Tang; Hong-Fu Zhang; M. Santosh; Ji-Feng Ying;

  • 作者单位

    State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China;

    State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China,State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China;

    School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China;

    State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Craton destruction; Subduction tectonics; Oceanic plate; Subcontinental lithospheric mantle; North China Craton;

    机译：克拉通破坏;俯冲构造;大洋板块次大陆岩石圈地幔;华北克拉通;

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