| Crustal structure using receiver function in the east part of A＇nyemaqen suture belt |
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| 引用本文： | 段永红,张先康,刘志,徐朝繁,王夫运,潘纪顺,梁国经.Crustal structure using receiver function in the east part of A＇nyemaqen suture belt[J].地震学报(英文版),2007,20(5):513-522. |
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| 作者姓名： | 段永红 张先康 刘志 徐朝繁 王夫运 潘纪顺 梁国经 |
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| 作者单位： | [1]Geophysical Exploration Center,China Earthquake Administration,Zhengzhou 450002,China [2]Longgang Volcano Observatory,Earthquake Administration of Jilin Province,Fusong134528,China |
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| 基金项目： | Foundation item： National Natural Science Foundation of China （40334040 and 40474049）. . Contribution No. 200705, Geophysical Exploration Center, China Earthquake Administration. |
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| 摘 要： | Twenty broadband seismographs were deployed along Hongyuan, Sichuan to Wuwei, Gansu. 81 teleseismic events were recorded in one year. We computed receiver functions from teleseismic waveform data and obtained S wave velocity structure beneath each station along the profile by using receiver function inversion method. The results revealed that the crustal structure is very complex and crustal average S wave velocity is to be on the low side. Low velocity structure generally exists in the depth range of 10～40 km in the crust between Aba arc fault and northern edge fault of Qinling earth＇s axis and it is a tectonic feature of complex geological process such as ancient A＇nyemaqen Tethys ocean from closing and side colliding to subducted plate exhumed or thrust rock slice lifted. The Moho is about 50 km depth along the profile and is slightly deeper in the south than in the north.
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| 关 键 词： | 四川 地震 预测 地震仪 |
| 文章编号： | 1000-9116（2007）05-0513-10 |
| 收稿时间： | 9 April 2007 |
| 修稿时间： | 2007-04-09 |
Crustal structure using receiver function in the east part of A’nyêmaqên suture belt? |
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| Duan Yong-hong , Zhang Xian-kang , Liu Zhi , Xu Zhao-fan , Wang Fu-yun , Pan Ji-shun and Liang Guo-jing.Crustal structure using receiver function in the east part of A’nyêmaqên suture belt?[J].Acta Seismologica Sinica(English Edition),2007,20(5):513-522. |
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| Authors: | Duan Yong-hong Zhang Xian-kang Liu Zhi Xu Zhao-fan Wang Fu-yun Pan Ji-shun and Liang Guo-jing |
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| Institution: | 1. Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, China; 2. Longgang Volcano Observatory, Earthquake Administration of Jilin Province, Fusong 134528, China |
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| Abstract: | Twenty broadband seismographs were deployed along Hongyuan, Sichuan to Wuwei, Gansu. 81 teleseismic events were recorded in
one year. We computed receiver functions from teleseismic waveform data and obtained S wave velocity structure beneath each
station along the profile by using receiver function inversion method. The results revealed that the crustal structure is
very complex and crustal average S wave velocity is to be on the low side. Low velocity structure generally exists in the
depth range of 10∼40 km in the crust between Aba arc fault and northern edge fault of Qinling earth’s axis and it is a tectonic
feature of complex geological process such as ancient A’nyêmaqên Tethys ocean from closing and side colliding to subducted
plate exhumed or thrust rock slice lifted. The Moho is about 50 km depth along the profile and is slightly deeper in the south
than in the north.
Contribution No. 200705, Geophysical Exploration Center, China Earthquake Administration. |
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| Keywords: | A’ nyêmaqên surture belt receiver function velocity structure |
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