| Deep structural characteristics and seismo—genesis of the M≥8.0 earthquakes in North China |
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| 引用本文： | 张先,张先康,刘敏,赵丽.Deep structural characteristics and seismo—genesis of the M≥8.0 earthquakes in North China[J].地震学报(英文版),2003,16(2):148-155. |
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| 作者姓名： | 张先 张先康 刘敏 赵丽 |
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| 作者单位： | ResearchCenterofExplorationGeophysics,ChinaSeimologicalBureau,Zhengzhou450002,China |
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| 摘 要： | Based on the results from seismogeological study,aeromagnetic inversion and deepseismic sounding(DSS),it is found that the M≥8.0 earthquakes in North China have three common deep structural characteristics,i.e,they all took place above the ultra-crustal deep faults or on the edges of the tectonic blocks with higher intensity,and there are low-velocity,low-density and high-conductive layers deep in the epicentral regions.The origins of the earth-quakes are also discussed and the two possibilities of seismogenesis are proposed,i.e,tectonic movement and intracrustal explosion.
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| 关 键 词： | 中国北部 震级 地震成因 深部结构 地震地质学 深源地震 DSS 断层 |
| 收稿时间： | 18 January 2002 |
| 修稿时间： | 15 November 2002 |
Deep structural characteristics and seismo- genesis of the M≥8.0 earthquakes in North China |
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| Zhang Xian , Zhang Xian-kang , Liu Min and Zhao Li.Deep structural characteristics and seismo- genesis of the M≥8.0 earthquakes in North China[J].Acta Seismologica Sinica(English Edition),2003,16(2):148-155. |
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| Authors: | Zhang Xian Zhang Xian-kang Liu Min and Zhao Li |
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| Institution: | Research Center of Exploration Geophysics, China Seismological Bureau, Zhengzhou 450002, China |
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| Abstract: | Based on the results from seismogeological study, aeromagnetic inversion and deep seismic sounding (DSS), it is found that
the M≥8.0 earthquakes in North China have three common deep structural characteristics, i.e., they all took place above the ultra-crustal deep faults or on the edges of the tectonic blocks with higher intensity, and
there are low-velocity, low-density and high-conductive layers deep in the epicentral regions. The origins of the earthquakes
are also discussed and the two possibilities of seismogenesis are proposed, i.e., tectonic movement and intracrustal explosion.
Foundation item: State Natural Science Foundation of China (4977230).
Contribution No. GPB200101, Research Center of Exploration Geophysics, China Seismological Bureau. |
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| Keywords: | North China M≥ 8 0 earthquakes deep structure seismogenesis |
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