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首页> 外文期刊>Seismological research letters >Sp Receiver‐Function Images of African and Arabian Lithosphere: Survey of Newly Available Broadband Data
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Sp Receiver‐Function Images of African and Arabian Lithosphere: Survey of Newly Available Broadband Data

机译：非洲和阿拉伯岩石圈的SP接收器函数图像：对新可用宽带数据的调查

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摘要

The growing quality and improving spatial coverage of broadband seismic stations on the African (Nubian + Somalian) and Arabian plates motivate us to present a catalog of S‐to‐P receiver functions (SRFs) from southern Africa to northern Arabia. As in North America where the ability to compare data from cratons to modern rift provinces has led to new insights about lithospheric discontinuities, so, too, in Africa and Arabia can we begin to track and study the Moho, midlithospheric discontinuities, and the lithosphere–asthenosphere boundary (LAB) between tectonothermal provinces and beneath plate boundaries. We utilized 1508 seismic stations recording 9349 teleseismic events to calculate 103,878 SRFs that we stacked in 1° circular bins. We find a robust positive arrival due to a seismic‐wavespeed increase downward across the Moho in virtually all our stacked SRF traces at 15–55?km depth, and we verify this is in good agreement with previously published Ps results, thereby validating the quality of our data set. Our stacked SRF traces also show a sub‐Moho negative arrival at a delay time equivalent to 50–132?km depth that should correspond to a negative velocity discontinuity at or above the LAB. Our continent‐wide, plate‐scale database offers the opportunity to explore for spatial and temporal evolution of lithospheric parameters.
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  • 来源
    《Seismological research letters》 |2020年第3期|共7页
  • 作者

    Lin Liu; Siyou Tong; Sanzhong Li; Saleh Qaysi;

  • 作者单位

    Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education College of Marine Geosciences Ocean University of China;

    Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education College of Marine Geosciences Ocean University of China;

    Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education College of Marine Geosciences Ocean University of China;

    Geology and Geophysics Department King Saud University;

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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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