青藏块体东北缘地壳运动与孕震特征
|
摘要
为了探索昆仑山口西Ms8.1大震后青藏块体东北缘中强地震相对活跃的原因 ,利用近几年来的GPS观测资料 ,用有限元方法研究了该区的水平运动变形与孕震特征 ,结合其它成果分析得到 :1)昆仑大震对青藏块体东北缘的运动变形产生相当影响 ,对其西部的影响亦很大 ;2 )差异运动强烈区域发生中强地震的危险性较高 ,压性区可能是应变能积累的反映 ,而张性区的出现及规模可能是大震发生紧迫性及震级大小的反映 ;3)研究区的西部地区近年来一直是应变能积累较快的地区 ,从区域变形特征与强震的对应关系看 ,近一两年发生中强地震的危险性仍然很大。
After %M%s8.1earthquake in the western part of Kunlun mountain pass, medium-strong earthquakes display more active. By use of new GPS observation data and finite element method, horizontal movement and deformation and seismogenic features of the northeastern margin of Qinghai-Tibet are studied. Combining with other research results,we can draw that: 1)the %M%s8.1 earthquake effects considerably the movement and deformation of the northeastern margin of Qinghai-Tibet block, and the effect is great in the western part of studied area; 2) strong differential motion zone has the high seismic risk, the compressional zone may result from the accumulation of strain energy and the appearance and size of tensional zone may reflect the urgency degree and magnitude of earthquake; 3) according to the relation between regional deformation features and medium-strong earthquakes, the risk of medium-strong earthquakes is high in coming one or two year in the western part of studied area where the rate of the accumulation of strain energy has been high for many years.
After %M%s8.1earthquake in the western part of Kunlun mountain pass, medium-strong earthquakes display more active. By use of new GPS observation data and finite element method, horizontal movement and deformation and seismogenic features of the northeastern margin of Qinghai-Tibet are studied. Combining with other research results,we can draw that: 1)the %M%s8.1 earthquake effects considerably the movement and deformation of the northeastern margin of Qinghai-Tibet block, and the effect is great in the western part of studied area; 2) strong differential motion zone has the high seismic risk, the compressional zone may result from the accumulation of strain energy and the appearance and size of tensional zone may reflect the urgency degree and magnitude of earthquake; 3) according to the relation between regional deformation features and medium-strong earthquakes, the risk of medium-strong earthquakes is high in coming one or two year in the western part of studied area where the rate of the accumulation of strain energy has been high for many years.
引文
中国地震局.基于GIS的地震分析预报系统MapSIS2.0中的活动断裂分布图
中国地震局第二监测中心.《2004年度地震趋势研究报告[R].张晓亮专题报告
1 WangQi,ZhangPeizhen,FreymuellerJT ,etal.PresentdaycrustaldeformationinChinaconstrainedbyGlobalPosition ingSystemmeasurements[J].Science,2001,294,574-577
2 ShiGHandGoodmanRE .Dimensionaldiscontinousdefor mationanalysis[J].Int.J .Numer.Anal.MethodsGe omech.,1985,9:541-556.
3 秦小军,刘宏先,赵其乐,等.断层带及其周围块体系统的非连续运动变形模拟[J].地壳形变与地震,2001,21(2):17～24.
3 QinXiaojun,LiuHongxian,ZhaoQile,etal.Discontinuousmovementdeformationsimulationoffaultbeltanditssur roundingblocksystem[J].CrustalDeformationandEarth quake,2001,21(2):17-24.(inChinese)
4 申重阳,吴云,王琪,等.华北地块内部主要断层运动模型的GPS数据反演分析[J].地壳形变与地震,2001,21(4):33～42.
4 ShenChongyang,WuYun,WangQi,etal.GPSdatainver sionanalysisofthemovementmodelsofmainfaultswithintheNorthChinablock[J].CrustalDeformationandEarth quake,2001,21(4):33-42.(inChinese)
5 刘澜波.用DDA模拟华北地区的无震断层滑动和断块形变[J].世界地震译丛,2001,5,56～63.
5 LiuLanbo.UsingDDAmethodtosimulateaseismicfaultslipandblockdeformationinNorthChina[J].TheSetofInternationalEarthquakeTranslations,2001,5,56-63.(inChinese)
6 陈兵,江在森,王双绪,等.利用非连续变形方法研究块体运动及其应力场初探[J].地壳形变与地震,2000,20(1):38～42.
6 ChenBing,JiangZaisen,WangSuangxu,etal.Usingdis continuousdeformationmethodtopreliminarilystudyblockmotionanditsstressfield[J].CrustalDeformationandEarthquake,2000,20(1):38-42.(inChinese)
7 张晓亮,江在森,王双绪,等.青藏块体东北缘及其周围地区现今时空运动变形特征[J].中国地震,2003,19(4):377～385.
7 ZhangXiaoliang,JiangZaisen,WangSuangxu,etal.Thepresentmotionanddeformationfeatureswithspatial timeofthenortheasternmarginofQinghaiTibetanditsadjacentarea[J].EarthquakeResearchinChina,2003,19(4):377-385.(inChinese)
8 张希,江在森,张晓亮,等.华北地区近期地壳水平运动的非震负位错反演[J].大地测量与地球动力学,2002,22(3),40～45.
8 ZhangXi,JiangZaisen,ZhangXiaoliang,etal.AseismicnegativedislocationinversionofrecenthorizontalcrustmovementinnorthChina[J].JournalofGeodesyandGeo dynamics,2002,22(3),40-45.(inChinese)
9 杨少敏,游新兆,杜瑞林,等.用双三次样条函数和GPS资料反演现今中国大陆构造形变场[J].大地测量与地球动力学,2002,22(1):68～75.
9 YangShaomin,YouXinzhao,DuRuilin,etal.Contempo raryhorizontaltectonicdeformationfieldsInChinainversedfromGPSobservations[J].JournalofGeodesyandGeody namics,2002,22(1):68-75.(inChinese)
10 陈化然,李轶群,汪翠芝,等.基于断层相互作用的地震活动有限元模型[J].大地测量与地球动力学,2002,22(2):86～90.
10 ChenHuaran,LiYiqun,WangCuizhi,etal.Studyonfiniteelementofstrongearthquakeactivitiesbasedoninteractionbetweenfaults[J].JournalofGeodesyandGeodynamics,2002,22(2):86-90.(inChinese)
11 杨红心,王乘,张秋文,等.青藏高原隆升的非线性动态有限元仿真研究[J].大地测量与地球动力学,2002,22(2):75～81.
11 YangHongxin,WangChen,ZhangQiuwen,etal.Researchonup liftofQinghaiTibetPlateaubynon lineardynamicalfiniteelementmethod[J].JournalofGeodesyandGeody namics,2002,22(2):75-81.(inChinese)
12 黄立人,马青,郭良迁,等.华北部分地区水平变形的力学机制—三维有限元计算和GPS复测结果的分析[J].地震学报,1999,21(1):50～56.
12 HuangLiren,MaQing,GuoLiangqian.etal.DynamicmechanismforhorizontaldeformationinpartofNorthChinaarea—three dimensionalfiniteelementcalculationandanalysisofresultsfromGPSremeasurement[J].ActaSeismologicaSinica,1999,21(1):50-56.(inChinese)
13 陈兵,王庆良,张四新,等.青藏块体北部构造变形与玉门5.9级地震[J].大地测量与地球动力学,2003,23(2):23～28.
13 ChenBing,WangQingliang,ZhangSixin,etal.RecenttectonicmovementcharacteristicsofnorthernpartofQing haiTibetblockandYumenearthquake(Ms5.9)[J].Jour nalofGeodesyandGeodynamics,2003,23(2):23-28.(inChinese)
中国地震局第二监测中心.《2004年度地震趋势研究报告[R].张晓亮专题报告
1 WangQi,ZhangPeizhen,FreymuellerJT ,etal.PresentdaycrustaldeformationinChinaconstrainedbyGlobalPosition ingSystemmeasurements[J].Science,2001,294,574-577
2 ShiGHandGoodmanRE .Dimensionaldiscontinousdefor mationanalysis[J].Int.J .Numer.Anal.MethodsGe omech.,1985,9:541-556.
3 秦小军,刘宏先,赵其乐,等.断层带及其周围块体系统的非连续运动变形模拟[J].地壳形变与地震,2001,21(2):17～24.
3 QinXiaojun,LiuHongxian,ZhaoQile,etal.Discontinuousmovementdeformationsimulationoffaultbeltanditssur roundingblocksystem[J].CrustalDeformationandEarth quake,2001,21(2):17-24.(inChinese)
4 申重阳,吴云,王琪,等.华北地块内部主要断层运动模型的GPS数据反演分析[J].地壳形变与地震,2001,21(4):33～42.
4 ShenChongyang,WuYun,WangQi,etal.GPSdatainver sionanalysisofthemovementmodelsofmainfaultswithintheNorthChinablock[J].CrustalDeformationandEarth quake,2001,21(4):33-42.(inChinese)
5 刘澜波.用DDA模拟华北地区的无震断层滑动和断块形变[J].世界地震译丛,2001,5,56～63.
5 LiuLanbo.UsingDDAmethodtosimulateaseismicfaultslipandblockdeformationinNorthChina[J].TheSetofInternationalEarthquakeTranslations,2001,5,56-63.(inChinese)
6 陈兵,江在森,王双绪,等.利用非连续变形方法研究块体运动及其应力场初探[J].地壳形变与地震,2000,20(1):38～42.
6 ChenBing,JiangZaisen,WangSuangxu,etal.Usingdis continuousdeformationmethodtopreliminarilystudyblockmotionanditsstressfield[J].CrustalDeformationandEarthquake,2000,20(1):38-42.(inChinese)
7 张晓亮,江在森,王双绪,等.青藏块体东北缘及其周围地区现今时空运动变形特征[J].中国地震,2003,19(4):377～385.
7 ZhangXiaoliang,JiangZaisen,WangSuangxu,etal.Thepresentmotionanddeformationfeatureswithspatial timeofthenortheasternmarginofQinghaiTibetanditsadjacentarea[J].EarthquakeResearchinChina,2003,19(4):377-385.(inChinese)
8 张希,江在森,张晓亮,等.华北地区近期地壳水平运动的非震负位错反演[J].大地测量与地球动力学,2002,22(3),40～45.
8 ZhangXi,JiangZaisen,ZhangXiaoliang,etal.AseismicnegativedislocationinversionofrecenthorizontalcrustmovementinnorthChina[J].JournalofGeodesyandGeo dynamics,2002,22(3),40-45.(inChinese)
9 杨少敏,游新兆,杜瑞林,等.用双三次样条函数和GPS资料反演现今中国大陆构造形变场[J].大地测量与地球动力学,2002,22(1):68～75.
9 YangShaomin,YouXinzhao,DuRuilin,etal.Contempo raryhorizontaltectonicdeformationfieldsInChinainversedfromGPSobservations[J].JournalofGeodesyandGeody namics,2002,22(1):68-75.(inChinese)
10 陈化然,李轶群,汪翠芝,等.基于断层相互作用的地震活动有限元模型[J].大地测量与地球动力学,2002,22(2):86～90.
10 ChenHuaran,LiYiqun,WangCuizhi,etal.Studyonfiniteelementofstrongearthquakeactivitiesbasedoninteractionbetweenfaults[J].JournalofGeodesyandGeodynamics,2002,22(2):86-90.(inChinese)
11 杨红心,王乘,张秋文,等.青藏高原隆升的非线性动态有限元仿真研究[J].大地测量与地球动力学,2002,22(2):75～81.
11 YangHongxin,WangChen,ZhangQiuwen,etal.Researchonup liftofQinghaiTibetPlateaubynon lineardynamicalfiniteelementmethod[J].JournalofGeodesyandGeody namics,2002,22(2):75-81.(inChinese)
12 黄立人,马青,郭良迁,等.华北部分地区水平变形的力学机制—三维有限元计算和GPS复测结果的分析[J].地震学报,1999,21(1):50～56.
12 HuangLiren,MaQing,GuoLiangqian.etal.DynamicmechanismforhorizontaldeformationinpartofNorthChinaarea—three dimensionalfiniteelementcalculationandanalysisofresultsfromGPSremeasurement[J].ActaSeismologicaSinica,1999,21(1):50-56.(inChinese)
13 陈兵,王庆良,张四新,等.青藏块体北部构造变形与玉门5.9级地震[J].大地测量与地球动力学,2003,23(2):23～28.
13 ChenBing,WangQingliang,ZhangSixin,etal.RecenttectonicmovementcharacteristicsofnorthernpartofQing haiTibetblockandYumenearthquake(Ms5.9)[J].Jour nalofGeodesyandGeodynamics,2003,23(2):23-28.(inChinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心