| 华北地区8级大震的深部构造特征及地震成因的探讨c |
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| 引用本文： | 张先张先康 刘 敏 赵 丽. 2003: 华北地区8级大震的深部构造特征及地震成因的探讨c. 地震学报, 25(2): 136-142. |
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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： | (中国郑州450002中国地震局地球物理勘探中心) |
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| 基金项目： | 国家自然科学基金(4977230)资助课题，中国地震局地球物理勘探中心科技成果(编号 GPB200401). |
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| 摘 要： | 在地震地质、航磁反演及人工地震测深工作的基础上，阐明了华北地区8级大震的3个深部构造特征，即地震发生在深部超壳断裂的上部，地震发生在强度较大的构造块体的边缘，震源区深部存在低速、低密及高导层构造．同时对地震成因进行了探讨，讨论了构造运动和壳内爆炸两种地震成因的可能．
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| 关 键 词： | 华北地区& 8级地震& 深部构造& 地震成因 |
| 文章编号： | 0253-3782(2003)02-0136-07 |
| 修稿时间： | 2002-01-18 |
DEEP STRUCTURAL CHARACTERISTICS AND SEISMO-GENESIS OF THE M=8.0 EARTHQUAKES IN NORTH CHINA |
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| Zhang Xian Zhang Xiankang Liu Min Zhao Li. DEEP STRUCTURAL CHARACTERISTICS AND SEISMO-GENESIS OF THE M=8.0 EARTHQUAKES IN NORTH CHINA[J]. Acta Seismologica Sinica, 2003, 25(2): 136-142 |
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| Authors: | Zhang Xian Zhang Xiankang Liu Min Zhao Li |
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| Abstract: | Based on the results from seismo-geological 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 re gions. The origins of the earthquakes are also discussed and two possibilities of seismogen-esis are proposed, i. e. , tectonic movement and intracrustal explosion. |
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| Keywords: | North China M=8. 0 earthquakes deep structure seismogenesis |
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