由地震活动参数分析安徽省新生代构造变形带现今活动习性与地震危险性
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摘要
应用多个地震活动参数来判定断裂带分段落活动习性的方法,分析安徽省新生代构造变形带不同分段落的现今活动习性及地震危险性。研究结果表明:安徽省新生代构造变形带中存在着9个具有不同现今活动习性的分段落,其中,霍邱—凤台、铜陵—宁国、明光—肥东3个段落现今活动习性处于较高应力背景下的相对闭锁状态,应属于有一定应变积累的潜在中强震危险段落;其它6个段落,现今活动习性处于中等或偏低应力背景下,以频繁或稀疏小震滑动为特征,未来复发中强以上地震的可能性较小。
Based on the method of using a number of seismic activity parameters to determine activity features of fault zone segments,current seismic activity and seismic risk features of different segments of Cenozoic tectonic deformation zones in Anhui Province are analyzed.The results show that: there are nine segments with different activity features in Cenozoic tectonic deformation of Anhui Province,among which the current activity features of Huoqiu-Fengtai,Tongling-Ningguo,Mingguang-Feidong segments are in a relatively high stress status and should belong to potential moderate-strong earthquake risk segments with certain strain accumulation;the present activity features of other six segments are in a middle or low stress background and are characterized by frequent or sparse small earthquake sliding,and the possibility of future recurrence of moderate-strong earthquakes is small.
Based on the method of using a number of seismic activity parameters to determine activity features of fault zone segments,current seismic activity and seismic risk features of different segments of Cenozoic tectonic deformation zones in Anhui Province are analyzed.The results show that: there are nine segments with different activity features in Cenozoic tectonic deformation of Anhui Province,among which the current activity features of Huoqiu-Fengtai,Tongling-Ningguo,Mingguang-Feidong segments are in a relatively high stress status and should belong to potential moderate-strong earthquake risk segments with certain strain accumulation;the present activity features of other six segments are in a middle or low stress background and are characterized by frequent or sparse small earthquake sliding,and the possibility of future recurrence of moderate-strong earthquakes is small.
引文
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[7]姚大全,刘加灿.华北活动地块区南缘阜南—霍邱地区地壳活动习性初探[J].中国地震,2005,21(2):216-223.
[8]姚大全,刘加灿.郯庐断裂带池河段的新活动[J].地震学报,2004,26(6):616-622.
[2]易桂喜,闻学泽.多地震活动性参数在断裂带现今活动习性与地震危险性评价中的应用与问题[J].地震地质,2007,29(2):254-271.
[3]国家地震局震害防御司.中国历史强震目录[M].北京:地震出版社,1995.1-514.
[4]中国地震局震害防御司.中国近代地震目录[M].北京:中国科学技术出版社,1999.1-637.
[5]张国民,傅征祥,杜燮泰,等.地震分析预报引论[M].北京:中国科学出版社,2001.26-27.
[6]易桂喜,闻学泽,王思维,等.由地震活动参数分析龙门山—岷山断裂带现今活动习性与强震危险性[J].中国地震,2006,22(2):117-125.
[7]姚大全,刘加灿.华北活动地块区南缘阜南—霍邱地区地壳活动习性初探[J].中国地震,2005,21(2):216-223.
[8]姚大全,刘加灿.郯庐断裂带池河段的新活动[J].地震学报,2004,26(6):616-622.
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