1765年沈阳5 1/2级地震发震构造判定
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摘要
对1765年沈阳51/2级地震的深、浅部地质构造条件、地震活动特征进行了分析,对震中附近的长白乡-观音阁断裂(F6)及依兰-伊通断裂、浑河断裂的活动性和地震危险性进行了评价,并与辽宁地区的中强地震活动进行了构造类比。认为F6的现代构造变形特征与构造应力条件一致,浅层地震探测、断裂破碎带发育特征和测年数据、断错地貌特征等均显示F6在第四纪晚期仍有活动,现代微小地震活动沿F6呈条带状分布。F6在5～6km或更大的深度上与浑河断裂等具有复合交叉结构,在平面展布上具有斜列状结构,断裂段的长度约20～25km左右,具备孕育和发生51/2级左右地震的条件。判定F6断裂是比依兰-伊通断裂和浑河断裂等区域性断裂具有更强的活动性和地震危险性的断裂构造,是1765年沈阳51/2级地震的发震构造。
The deep-shallow geological structural conditions and seismic activities for the Shenyang M5 1/2 earthquake in 1765 are analyzed,the activities and seismic hazards for the Changbaixiang-Guanyinge fault(F6),the Yilan-Yitong fault,the Hunhe fault which around the epicenter are also evaluated.It is analogised of seismic structure for mid-strong earthquakes in the area of Liaoning.It is determined that the modern tectonic deformation features for the F6 is coincident with the effect of modern tectonic stress.Results of shallow seismic prospectings,progressive features of fault ruptures,aging data and offset landform show that the F6 is still active in late Quaternary.Modern slight shocks distribute along the F6.The F6 interjuncts to the Hunhe fault at the depth of 5-6 km or more,it has an echelon structure in planimetric trend,and the length of fault segment is about 20-25 km.The F6 possess the condition of gestating and generating an earthquake of 5 1/2 or so.The F6 is determined to be more active than the Yilan-Yitong and the Hunhe fault,and it has a higher seismic hazard.The F6 is the seismogenic structure for the Shenyang M5 1/2 earthquake in 1765.
The deep-shallow geological structural conditions and seismic activities for the Shenyang M5 1/2 earthquake in 1765 are analyzed,the activities and seismic hazards for the Changbaixiang-Guanyinge fault(F6),the Yilan-Yitong fault,the Hunhe fault which around the epicenter are also evaluated.It is analogised of seismic structure for mid-strong earthquakes in the area of Liaoning.It is determined that the modern tectonic deformation features for the F6 is coincident with the effect of modern tectonic stress.Results of shallow seismic prospectings,progressive features of fault ruptures,aging data and offset landform show that the F6 is still active in late Quaternary.Modern slight shocks distribute along the F6.The F6 interjuncts to the Hunhe fault at the depth of 5-6 km or more,it has an echelon structure in planimetric trend,and the length of fault segment is about 20-25 km.The F6 possess the condition of gestating and generating an earthquake of 5 1/2 or so.The F6 is determined to be more active than the Yilan-Yitong and the Hunhe fault,and it has a higher seismic hazard.The F6 is the seismogenic structure for the Shenyang M5 1/2 earthquake in 1765.
引文
[1]章淮鲁.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,中国大陆2005年前强震危险性预测研究.北京:地震出版社,1997:113-119
[2]焦明若,唐春安,张国民,等.细观非均匀性对岩石破裂过程和微震序列类型影响的数值试验研究.地球物理学报,2003,46(5):659-666
[3]赵振.1765年沈阳M51/2地震的再研究.东北地震研究,2001,17(3):42-45
[4]吴戈,房贺岩,李志田,等.东北地震史料辑览.北京:地震出版社,1992:29-37
[5]国家地震局震害防御司.中国历史强震目录.北京:地震出版社,1995:299
[6]辽宁省地矿局.辽宁省区域地质志(1:50万).北京:地质出版社,1989:679-692,707-729
[7]朱风鸣.1975年海城地震.北京:地震出版社,1980:165-195
[8]万波,廖旭.沈阳市(含抚顺)活断层探测与地震危险性评价.北京:地震出版社,2008:39-49,52-75,272-323
[9]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.北京:地震出版社,1998:7-15
[10]刘保金,姬继法,徐朝繁,等.共偏移距地震反射波方法用于城市活断层探测.地震地质,2006,28(3):411-418
[11]李衍久,韩慕康.浑河断裂活动性与抚顺城市安全性.北京:地震出版社,1994:86-120
[12]孔繁强,卢月,卢良玉.抚顺城区段浑河断裂现今活动性研究的述评.东北地震研究,2003,19(3):42-49
[13]辽宁省地矿局.辽宁第四纪.北京:地质出版社,1983:45-55
[14]环文林,张晓东,宋昭仪.中国大陆内部走滑型发震构造的构造变形场特征.地震学报,1995,17(2):139-147
[15]钟以章,白云.辽东半岛及两侧海域深部构造、活动构造与地震关系研究.华北地震科学,1999,17(2):59-65
[2]焦明若,唐春安,张国民,等.细观非均匀性对岩石破裂过程和微震序列类型影响的数值试验研究.地球物理学报,2003,46(5):659-666
[3]赵振.1765年沈阳M51/2地震的再研究.东北地震研究,2001,17(3):42-45
[4]吴戈,房贺岩,李志田,等.东北地震史料辑览.北京:地震出版社,1992:29-37
[5]国家地震局震害防御司.中国历史强震目录.北京:地震出版社,1995:299
[6]辽宁省地矿局.辽宁省区域地质志(1:50万).北京:地质出版社,1989:679-692,707-729
[7]朱风鸣.1975年海城地震.北京:地震出版社,1980:165-195
[8]万波,廖旭.沈阳市(含抚顺)活断层探测与地震危险性评价.北京:地震出版社,2008:39-49,52-75,272-323
[9]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.北京:地震出版社,1998:7-15
[10]刘保金,姬继法,徐朝繁,等.共偏移距地震反射波方法用于城市活断层探测.地震地质,2006,28(3):411-418
[11]李衍久,韩慕康.浑河断裂活动性与抚顺城市安全性.北京:地震出版社,1994:86-120
[12]孔繁强,卢月,卢良玉.抚顺城区段浑河断裂现今活动性研究的述评.东北地震研究,2003,19(3):42-49
[13]辽宁省地矿局.辽宁第四纪.北京:地质出版社,1983:45-55
[14]环文林,张晓东,宋昭仪.中国大陆内部走滑型发震构造的构造变形场特征.地震学报,1995,17(2):139-147
[15]钟以章,白云.辽东半岛及两侧海域深部构造、活动构造与地震关系研究.华北地震科学,1999,17(2):59-65
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