...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Pure and Applied Geophysics >Subduction Mode Selection During Slab and Mantle Transition Zone Interaction: Numerical Modeling
【24h】

Subduction Mode Selection During Slab and Mantle Transition Zone Interaction: Numerical Modeling

机译：板坯和地幔转换区交互期间的俯冲模式选择：数值建模

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

AbstractGlobal seismic tomography of the subduction zones shows that the subducting slabs could either stagnate around the 660-km discontinuity, or penetrate into the lower mantle. The stagnating slabs also have various morphologies. These are directly related to the interaction between the subducting slabs and the mantle transition zone (MTZ), the dynamics of which are still debated. Using a 2-D thermo-mechanical model, we systematically investigated the modes of subduction in the mantle transition zone and explored the key constraints of various subduction styles. Four basic subduction modes are obtained in the numerical experiments, including one with slab penetrating through the 660-km discontinuity and three other modes with slab stagnating in the MTZ (i.e. folding, lying and rolling-back). The numerical models indicate that the age of subducting oceanic plate, the thickness of overriding continental lithosphere and the convergence velocity play crucial roles in the dynamics of subducting slab and MTZ interaction. In general, the young subducting slab favors the penetration or folding mode, whereas the old subducting slab tends to result in lying or rolling-back mode, although other parameters can also affect. Our models also show a strong correlation between the subduction mode selection and dip angle of the slab tip when reaching the 660-km phase boundary.]]>
机译：<！[cdata [ <标题>抽象 ara id =“par1”>俯冲区域的全局地震勾摄显示出来的介质板坯可以围绕660公里的不连续性停滞，或渗透到下部地幔中。停滞的板坯也具有各种形态。这些与底板板和地幔转换区（MTZ）之间的相互作用直接相关，其动态仍然讨论。使用2-D热电机械模型，我们系统地研究了地幔过渡区的俯冲模式，并探索了各种俯冲样式的关键约束。在数值实验中获得了四种基本的俯冲模式，包括通过平板穿过660公里的不连续性和三种其他模式，在MTZ中停滞三个（即折叠，躺回和回滚）。数值模型表明，底板的衰老，覆盖大陆岩石圈的厚度和趋同速度在底板和MTZ相互作用的动态中起重要作用。通常，幼晶板有利于穿透或折叠模式，而旧的底板板趋于导致躺着或滚动的模式，尽管其他参数也会影响。我们的模型还在达到660 km相边界时显示板尖端的俯冲模式和倾角之间的强烈相关性。 ]]>

著录项

  • 来源
    《Pure and Applied Geophysics》 |2018年第2期|共20页
  • 作者

    Yanan Shi; Dongping Wei; Zhong-Hai Li; Ming-Qi Liu; Mengxue Liu;

  • 作者单位

    Key Laboratory of Computational Geodynamics College of Earth Sciences University of Chinese Academy of Sciences;

    Key Laboratory of Computational Geodynamics College of Earth Sciences University of Chinese Academy of Sciences;

    Key Laboratory of Computational Geodynamics College of Earth Sciences University of Chinese Academy of Sciences;

    Key Laboratory of Computational Geodynamics College of Earth Sciences University of Chinese Academy of Sciences;

    Key Laboratory of Computational Geodynamics College of Earth Sciences University of Chinese Academy of Sciences;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地球物理学;
  • 关键词

    Mantle transition zone; subduction mode; slab penetration/stagnation; numerical modeling;

    机译：地幔过渡区;俯冲模式;平板渗透/停滞;数值建模;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号