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首页> 外文期刊>Seismological research letters >Imaging the Topography of Crust-Mantle Boundary from a High-Density Seismic Array beneath the Middle-Lower Yangtze River, Eastern China
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Imaging the Topography of Crust-Mantle Boundary from a High-Density Seismic Array beneath the Middle-Lower Yangtze River, Eastern China

机译：从中国中下长江下方的高密度地震阵列成像地壳 - 地幔边界的形貌

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摘要

The low cost and ease of deployment allows for integrated geophones to be deployed in very large numbers, often known as large N arrays. This ability has facilitated many new directions in seismological research. Here, we offer a new application example, in which a dense array was used in imaging the details of the topography of the crustal-mantle seismic boundary. In 2015, an experiment with a large-number and high-density geophone array was conducted in the middle-lower Yangtze River metallogenic belt (MLYRMB). During 10 days of continuous observation, there were five teleseismic events with high signal-to-noise ratio three-component waveforms recorded by the array. Then, P-wave receiver functions were calculated and adopted to image the Moho topography. The result shows that the Moho depth beneath the array varies significantly. The Moho topography beneath the MLYRMB region is deflected and characterized by mantle uplift that could be taken as a feature of intense crust-mantle interaction, such as mantle-derived magma emplacement. The result indicates that receiver function research using dense geophone arrays can provide more detailed information about Moho topography as well as about multiscale crustal structures.
机译：低成本和易于部署允许集成的地理位音在非常大的数字中部署，通常称为大n阵列。这种能力促进了地震研究中的许多新方向。在这里，我们提供了一个新的应用示例，其中使用密集的阵列对地壳地震边界的形貌进行成像。 2015年，中下长江矿化带（MlyRMB）进行了具有大量和高密度地球孔阵列的实验。在连续观察的10天期间，阵列记录的高信噪比三分量波形有五个情感事件。然后，计算并采用P波接收器功能以将MOHO地形图像图像。结果表明，阵列下方的Moho深度显着变化。在摩尔MLYRMB区域下方的MOHO地形被偏转和特征在于搭式隆起，可作为强烈的地壳搭桥相互作用的特征，例如披风衍生的岩浆垫施加。结果表明，使用致密地震仪阵列的接收器功能研究可以提供有关Moho地形的更详细信息以及多尺度的地壳结构。

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  • 来源
    《Seismological research letters》 |2018年第5期|共8页
  • 作者

    Wei Yunhao; Tian Xiaobo; Duan Yonghong; Tian Xiaofeng;

  • 作者单位

    Chinese Acad Sci Inst Geol &

    Geophys State Key Lab Lithospher Evolut 19 Beitucheng West Rd Beijing 100029 Peoples R China;

    Chinese Acad Sci Inst Geol &

    Geophys State Key Lab Lithospher Evolut 19 Beitucheng West Rd Beijing 100029 Peoples R China;

    China Earthquake Adm Geophys Explorat Ctr 75 Wenhua Rd Zhengzhou 450002 Henan Peoples R China;

    China Earthquake Adm Geophys Explorat Ctr 75 Wenhua Rd Zhengzhou 450002 Henan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地震学;
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