鄂尔多斯周缘地带未来强震发生地区初探
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摘要
根据对地质构造和构造活动特征的研究可知 ,鄂尔多斯周缘各断陷盆地均有发生强烈地震的可能。根据对历史地震活动规律和现今地震活动特征的研究 ,认为 ,鄂尔多斯周缘未来强震活动具有“填空性”,即历史上已发生过强烈地震的各盆地 ,近期再次发生的可能性不大 ;历史上未发生过强烈地震而近一个时段 (数十年间 )中小地震活动频度比较高 ,持续时间比较长的某些盆地 ,如北缘构成河套平原的临河盆地、白彦花盆地、呼和浩特和包头两市所在的呼包盆地 ,东北缘的大同盆地和延怀盆地等 ,是未来发生强烈地震 (大于 7级甚至超过 8级 )的最优选地段。
it is known from the geological structure and its activity that all the downfaulted basins along the boundary of Ordos block have the potential risk of strong earthquake.Based on the study on historic and current seismicity,we believe that the earthquakes in the region can be characterized by gap-filling.It means,that there is less possibility of strong earthquakes in the near future in the basins where strong earthquake occured in history,whereas the basin that small and moderate quakes occurred frequently and incessantly in recent several decades may be the potential region of strong earthquake (M>7 even M>8),such as Linhe Basin,Baiyanhua Basin,Huhehaote-Baotou Basin,Datong Basin and Yanqing Basin.
it is known from the geological structure and its activity that all the downfaulted basins along the boundary of Ordos block have the potential risk of strong earthquake.Based on the study on historic and current seismicity,we believe that the earthquakes in the region can be characterized by gap-filling.It means,that there is less possibility of strong earthquakes in the near future in the basins where strong earthquake occured in history,whereas the basin that small and moderate quakes occurred frequently and incessantly in recent several decades may be the potential region of strong earthquake (M>7 even M>8),such as Linhe Basin,Baiyanhua Basin,Huhehaote-Baotou Basin,Datong Basin and Yanqing Basin.
引文
[1] 《国家地震局鄂尔多斯周缘活动断裂系》课题组.鄂尔多斯周缘活动断裂系[C].北京:地震出版社,1988,254-289.
[2] 邓起东,等.鄂尔多斯周缘断陷盆地带的构造活动特征及其形成机制[C].现代地壳运动研究,北京:地震出版社,1985,58-78.
[3] 邓起东,等.中国的活动断裂[C].中国活动断裂,北京:地震出版社,1982,19-27.
[4] 武烈,等.山西地震[C].北京:地震出版社,1993,21-67.
[5] 徐锡伟,等.山西忻定盆地的活动断裂与地震活动性——晋北剪切带尾端张性区构造特征的研究[C],现代地壳运动研究,北京:地震出版社,1987,37-50.
[6] 尤惠川.河套断陷盆地带地质构造特征及其成因机制的研究[C].现代地壳运动研究,北京;地震出版社,1985,88-97.
[7] 李孟銮.宁夏地区现代构造应力场及其与地震活动的关系[J].地震研究,1986,(3):299-314.
[8] 韩恒悦,等.渭河新生代断陷盆地与华县大地震[C].中国活动断裂,北京:地震出版社,1982,133-140.
[9] 王春华,等.汾渭地堑系形成条件及地震活动性的实验研究[C].现代地壳运动研究,北京:地震出版社,1985,165-170.
[10] 丁国瑜.古地震标志问题[C].中国活动断裂.北京:地震出版社,1982,1-9.
[11] 冯学才,等.鄂尔多斯块体南缘发现国内罕见的史前大地震形变带[J].西北地震学报,1984,(4):96.
[12] 陈国顺,等.临汾中、晚更新世古地震与新构造运动[C].史前地震与第四纪地质文集,陕西科学技术出版社,1982,82-91.
[13] 李永善,等.华县大地震震害与古地震遗迹探讨[C].史前地震与第四纪地质文集,陕西科学技术出版社,1982,30-42.
[14] 蒋溥,鄂尔多斯周边地堑系和大震累积周期[C].现代地壳运动研究,北京:地震出版社,1985,79-87.
[2] 邓起东,等.鄂尔多斯周缘断陷盆地带的构造活动特征及其形成机制[C].现代地壳运动研究,北京:地震出版社,1985,58-78.
[3] 邓起东,等.中国的活动断裂[C].中国活动断裂,北京:地震出版社,1982,19-27.
[4] 武烈,等.山西地震[C].北京:地震出版社,1993,21-67.
[5] 徐锡伟,等.山西忻定盆地的活动断裂与地震活动性——晋北剪切带尾端张性区构造特征的研究[C],现代地壳运动研究,北京:地震出版社,1987,37-50.
[6] 尤惠川.河套断陷盆地带地质构造特征及其成因机制的研究[C].现代地壳运动研究,北京;地震出版社,1985,88-97.
[7] 李孟銮.宁夏地区现代构造应力场及其与地震活动的关系[J].地震研究,1986,(3):299-314.
[8] 韩恒悦,等.渭河新生代断陷盆地与华县大地震[C].中国活动断裂,北京:地震出版社,1982,133-140.
[9] 王春华,等.汾渭地堑系形成条件及地震活动性的实验研究[C].现代地壳运动研究,北京:地震出版社,1985,165-170.
[10] 丁国瑜.古地震标志问题[C].中国活动断裂.北京:地震出版社,1982,1-9.
[11] 冯学才,等.鄂尔多斯块体南缘发现国内罕见的史前大地震形变带[J].西北地震学报,1984,(4):96.
[12] 陈国顺,等.临汾中、晚更新世古地震与新构造运动[C].史前地震与第四纪地质文集,陕西科学技术出版社,1982,82-91.
[13] 李永善,等.华县大地震震害与古地震遗迹探讨[C].史前地震与第四纪地质文集,陕西科学技术出版社,1982,30-42.
[14] 蒋溥,鄂尔多斯周边地堑系和大震累积周期[C].现代地壳运动研究,北京:地震出版社,1985,79-87.
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