辽宁省及邻近地区主要地震构造及其危险性判定
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摘要
辽宁省及邻近地区的地震活动主要集中在海城地震区、下辽河—辽东湾、鸭绿江口和辽东半岛西侧的金州断裂沿线,地震活动与地质构造之间具有高度的相关性,明显受到了NE—NNE向和NW向两组构造的制约,构造交会部位亦即地震活动条带的结点是破坏性地震的多发区。研究表明,金州断裂盖州北—鞍山段、海城河断裂、鸭绿江断裂西支东港以南段等6条地震构造(段)是区内危险性最高的地震构造,按照4级划分原则,可将其确定为高危险等级;金州断裂金州—普兰店段、郯庐断裂带渤中北—辽东湾段、依兰—伊通断裂铁岭—开原北段等10条地震构造(段)确定为较高危险等级;郯庐断裂带下辽河段、医巫闾山西侧断裂等4条地震构造(段)危险等级一般,其它地震构造(段)的危险性较低。
Seismic activities in the area of Liaoning province and its adjacent area mainly concentrate upon the regions such as Haicheng, Lower Liaohe-Liaodong gulf,the yalu river mouth and the western part of Liaodong Peninsula along the Jinzhou fault zone,etc. It has a high degree of correlation seismic activity and with seismic activity and geologic structures, earthquakes are tied by NE-NNE and NW trend structures, destructive earthquakes occurred frequently at the intersection parts of the two trend structures. The result shows that in this area,6 structures(or segments) such as the north of Gaizhou-Anshan segment of Jinzhou fault zone etc. which are the highest dangerous degree structures(or segments),10 seismic structural segments such as Jinzhou—Pulandian segment of Jinzhou fault zone etc. which are confirmed to be higher degree,such as Xialiaohe segment of Tanlu fault zone etc. which are confirmed to be common degree, and others are lower degree.
Seismic activities in the area of Liaoning province and its adjacent area mainly concentrate upon the regions such as Haicheng, Lower Liaohe-Liaodong gulf,the yalu river mouth and the western part of Liaodong Peninsula along the Jinzhou fault zone,etc. It has a high degree of correlation seismic activity and with seismic activity and geologic structures, earthquakes are tied by NE-NNE and NW trend structures, destructive earthquakes occurred frequently at the intersection parts of the two trend structures. The result shows that in this area,6 structures(or segments) such as the north of Gaizhou-Anshan segment of Jinzhou fault zone etc. which are the highest dangerous degree structures(or segments),10 seismic structural segments such as Jinzhou—Pulandian segment of Jinzhou fault zone etc. which are confirmed to be higher degree,such as Xialiaohe segment of Tanlu fault zone etc. which are confirmed to be common degree, and others are lower degree.
引文
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[20]卢造勋,等.内蒙古东乌珠穆沁旗至辽宁东沟地学断面[J].地球物理学报,1993,36(6):765-772.
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[3]章淮鲁,等.未来十年(1996~2005年)中国各地震带地震活动强度及发震地点预测[C].中国大陆2005年前强震危险性预测研究[M].北京:地震出版社,1997.
[4]高常波,钟以章.东北输油管道场址断层活动性与地震危险性研究[M].北京:地震出版社,1998.
[5]辽宁省地矿局.辽宁省区域地质志[M].北京:地质出版社,1989.
[6]朱凤鸣,等.1975年海城地震[M].北京:地震出版社,1980.
[7]江娃利,等.辽宁海城NW向构造全新世活动特征及古地震研究[C]//地壳构造与地壳应力文集[M].北京:地震出版社,1999.
[8]万波,廖旭,等.沈阳市(含抚顺)活断层探测与地震危险性评价[M].北京:地震出版社,2008.
[9]万波,等.辽东半岛中强地震活动及其与构造相关性[J].地震地质,2013,35(2):300-314.
[10]万波,等.1861年普兰店东6级地震发震构造判定[J].中国地震,2010,26(3):304-313.
[11]万波,钟以章.东北地区的新构造运动特征分析及新构造运动分区[J].东北地震研究,1997,13(4):64-75.
[12]环文林,等.中国大陆内部走滑型发震构造的构造应力场特征[J].地震学报,1994,16(4):455-462.
[13]环文林,等.中国大陆内部走滑型发震构造粘滑运动的结构特征[J].地震学报,1997,19(3):225-234.
[14]中国地震局.JSGC-04城市活动断层探测技术系统技术规程[S].北京:地震出版社,2005.
[15]Wells D L,Coppersmith K J.New Empirical Relationships among Magnitude,Rupture Length,Rupture Width,Rupture Area,and Surface Displacement[J].Bulletin of the Seismological Society of America,1994,84(4).
[16]闻学泽,等.中国大陆东部中-弱活动断层潜在地震最大震级评估的震级-频度关系模型[J].地震地质,2007,29(2):236-253.
[17]Mark Leonard.Earthquake Fault Scaling:SelfConsistent Relating of Rupture Length,Width,Average Displacement,and Moment Release[J].Bulletin of the Seismological Society of America,2010,100(5A).
[18]邓起东,等.地质地表破裂参数与震级关系的研究[M].北京:地震出版社,1992.
[19]曹凤娟,焦明若.基于层次分析的辽宁地区中强震预测指标体系及效能评估[J].中国地震,2012,28(4):415-424.
[20]卢造勋,等.内蒙古东乌珠穆沁旗至辽宁东沟地学断面[J].地球物理学报,1993,36(6):765-772.