|本期目录/Table of Contents|

[1]殷 娜,余中元,石砚斌,等.鄂中盆地远安断裂的新活动特征及地震地质意义[J].地震研究,2021,44(04):607-612.
　YIN Na,YU Zhongyuan,SHI Yanbin,et al.New Active Characteristics and Seismological Significance of the Yuan’an Fault in the Central Hubei Basin[J].Journal of Seismological Research,2021,44(04):607-612.
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鄂中盆地远安断裂的新活动特征及地震地质意义(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
44
期数:
2021年04期
页码:
607-612
栏目:
出版日期:
2021-11-10

文章信息/Info

Title:
New Active Characteristics and Seismological Significance of the Yuan’an Fault in the Central Hubei Basin
作者:
殷 娜1; 2; 余中元1; 2; 石砚斌1; 2; 付国超3
(1.防灾科技学院,河北 三河 065201; 2.河北省地震动力学重点实验室,河北 三河 065201; 3.中国地震局地球物理研究所,北京100010)
Author(s):
YIN Na1; 2; YU Zhongyuan1; 2; SHI Yanbin1; 2; FU Guochao3
(1.Institute of Disaster Prevention,Sanhe 065201,Hebei,China;2.Hebei Key Laboratory of Earthquake Dynamics,Sanhe 065201,Hebei,China;3.Institute of Geophysics,China Earthquake Administration,Beijing 100010,China)
关键词:
鄂中盆地;  远安断裂;  新活动特征;  地震地质意义;  扬子克拉通
Keywords:
the central Hubei Basin;  the Yuan’an Fault;  new activity features;  seismogeological significance;  the Yangtze Craton
分类号:
P315.2
DOI:
-
摘要:
鄂中盆地地处稳定的扬子克拉通内部,但近年来陆续有中等强度地震发生,其孕震机理和发震构造备受关注。通过高密度电法勘探和野外地表地质调查方法,研究了鄂中盆地远安断裂的新活动特征。结果表明:远安断裂在第四纪早期构造变形强烈,运动方式以正断为主兼具右旋走滑分量。尽管断裂晚第四纪以来活动强度逐渐减弱,但仍具备发生中等强度地震的能力。应重视扬子克拉通内部NW或NNW向断裂作为中强地震发震构造的可能性,其潜在地震危险不容忽视。
Abstract:
The central Hubei Basin is located in the interior of the stable Yangtze Craton,but moderate earthquakes have occurred frequently in the Basin in recent years.Thus,its seismogenic mechanism and seismogenic structures have attracted much attention.Taking the Yuan’an Fault in central Hubei Basin as an example,this paper studies its new activity characteristics by means of high-density electrical prospecting and field geological survey.The results show that the tectonic deformation of the Yuan’an Fault was strong in the early Quaternary,and the tectonic mode was mainly dominated by normal movement with dextral strike-slip component.Although the activity intensity of the fault has been gradually weakening since the late Quaternary,it still has the seismogenic capacity of moderate earthquakes.The research also hints that these NW or NWW strike-slip faults with strong deformation in the early Quaternary play an obvious role in controlling modern medium-and strong-earthquakes in the Yangtze Craton.The possibility that these NW trending faults,which may be the seismogenic structures for moderate-and strong-earthquakes in the craton interior,should be paid more attention to and their potential seismic hazards should not be ignored.

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备注/Memo

备注/Memo:
收稿日期:2021-04-27
基金项目:河北省地震动力学重点实验室项目(FZ202207)、中央高校基本科研业务费专项(ZY20180204)和青藏高原第二次科学考察项目(2019QZKK0901)联合资助.

更新日期/Last Update: 2021-11-10