华北东部复杂的660 km相变界面

刘震, 田小波, 聂仕潭, 段耀晖, 滕吉文. 华北东部复杂的660 km相变界面[J]. 地球物理学报, 2016, 59(6): 2039-2046, doi: 10.6038/cjg20160610
引用本文: 刘震, 田小波, 聂仕潭, 段耀晖, 滕吉文. 华北东部复杂的660 km相变界面[J]. 地球物理学报, 2016, 59(6): 2039-2046, doi: 10.6038/cjg20160610
LIU Zhen, TIAN Xiao-Bo, NIE Shi-Tan, DUAN Yao-Hui, TENG Ji-Wen. The complex 660 km discontinuity beneath eastern of North China[J]. Chinese Journal of Geophysics (in Chinese), 2016, 59(6): 2039-2046, doi: 10.6038/cjg20160610
Citation: LIU Zhen, TIAN Xiao-Bo, NIE Shi-Tan, DUAN Yao-Hui, TENG Ji-Wen. The complex 660 km discontinuity beneath eastern of North China[J]. Chinese Journal of Geophysics (in Chinese), 2016, 59(6): 2039-2046, doi: 10.6038/cjg20160610

华北东部复杂的660 km相变界面

详细信息
    作者简介:

    刘震,男,1985年生,中国科学院地质与地球物理研究所博士研究生,主要从事地球壳幔结构方面的研究.E-mail:liuzhen@mail.iggcas.ac.cn

  • 中图分类号: P315

The complex 660 km discontinuity beneath eastern of North China

  • 利用华北固定台网的宽频带地震远震记录波形资料,提取P波接收函数,通过偏移成像和共转换点叠加,得到华北地区东部地幔过渡带深度及厚度的图像.研究结果显示,地幔过渡带上界面(410 km间断面)深度起伏变化不大;在华北地区东部,存在较厚的地幔过渡带,地幔过渡带下界面(660 km间断面)在660 km深度附近出现两个不同的界面.造成地幔过渡带增厚并出现两个深度不同的界面的原因可能是存在橄榄岩以外的地幔物质相变,该物质相变拥有与橄榄岩向钙钛矿转变不同的克拉伯龙斜率,太平洋俯冲板块的低温造成两种不同的相变界面发生不同程度的改变.双重660 km间断面的范围存在向北西方向延伸的趋势并且向南至少延伸到30°N.本文的结果可为古西太平洋板块向华北俯冲前缘位置的研究提供约束.
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出版历程
收稿日期:  2015-08-18
修回日期:  2016-03-19
上线日期:  2016-06-05

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