| 玛沁—兰州—靖边剖面壳幔复杂性的研究 |
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| 引用本文： | 赖晓玲,李松林,张先康,成双喜.玛沁—兰州—靖边剖面壳幔复杂性的研究[J].地球物理学进展,2001,16(2):65-72. |
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| 作者姓名： | 赖晓玲 李松林 张先康 成双喜 |
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| 作者单位： | 中国地震局地球物理勘探中心, |
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| 基金项目： | 国家重点基础发展项目! (973项目，子课题 95 13 0 2 0 2号 ) .物探中心科技论著 2 0 0 0 13 |
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| 摘 要： | 利用波的瞬时特性和波列长度参数量，给出一种地震波形复杂性系数的计算方法，该方法呆以用于描述研究区介质的复杂性，处理了中国地震局物探中心于1999年7月实施的玛沁－兰州－靖边地震测深剖面，得到了该剖莫霍界面复杂性系数分布图，结果表明沿剖面的不同构造单元。莫霍界面的复杂性有较大差异，复杂性系数分布沿剖面存在两个明显的变化特征，在该剖面的玛沁裂断和海原地地震的下方，莫霍界面的复杂性系数明显大于沿剖面的其它位置，对穿过各个构造单元的PmP波形做了频频分析，在玛沁断裂和海原地震的下方，频谱的优势频率范围明显较其它位置宽并且出现多峰值。
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| 关 键 词： | 复杂性系数 莫霍界面性质 瞬时特征 频谱分析 地震波 地震测量资料处理 |
| 文章编号： | 1004-2903(2001)02-0067-08 |
| 修稿时间： | 2000年9月5日 |
A STUDY ON THE COMPLEXITY AT THE CRUST-UPPER MANTLE TRANSITION ZONE ALONG MAQIN-LANZHOU-JINGBIAN DEEP SEISMIC SOUNDING (DSS) PROFILE |
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| LAI Xiao-Ling,LI Song-lin,ZHANG Xian-kang,CHENG Shuang-xi.A STUDY ON THE COMPLEXITY AT THE CRUST-UPPER MANTLE TRANSITION ZONE ALONG MAQIN-LANZHOU-JINGBIAN DEEP SEISMIC SOUNDING (DSS) PROFILE[J].Progress in Geophysics,2001,16(2):65-72. |
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| Authors: | LAI Xiao-Ling LI Song-lin ZHANG Xian-kang CHENG Shuang-xi |
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| Abstract: | A method was proposed to compute the complexity coefficient of seismic waves using its transient behavior and duration in this paper. It can be used to describe the complexity of the medium. The distribution of complexity of the Moho has been obtained by data processing of Maqin Lanzhou Jingbian DSS profile. The results show that there are great variations for the complexity of the Moho along the profile. There exist two regions with great vartiations of the complexity coefficients. At Maqin Fault and Haiyuan Earthquake, the complexity coefficients are evidently larger than those in other regions. The spectrum analysis of PmP waves was also performed for different tectonic units. On Maqin Fault and Haiyuan Earthquake Region the dominant frequency band are much wider than those in other regions and there exist multiple peaks along the spectrum curves. |
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| Keywords: | Complexity Coefficient Property of the Moho Transient Behavior of the waves Spectrum analysis |
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