青藏块体东北缘地壳水平运动状态
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摘要
应用青藏块体东北缘 1999～ 2 0 0 3年多期GPS观测资料 ,计算了不同时段GPS点水平运动速率。通过分析发现 :甘青块体可分为东部块体和西部块体 ,东、西部块体的运动状态存在明显的差异 ;受 2 0 0 1年 11月 14日昆仑Ms8.1地震的影响 ,震后地壳运动状态发生了明显的改变
In this paper,we have calculated the horizontal movement rate of GPS sites in northeastern margin of the Qinghai Tibet block by use of GPS observing data from 1999 to 2003.It is found that Gan Qing block can be divided into west block and east block,and there is a explicit difference of movement state between the two blocks.By the influence of Kunlun 8.1 earthquake on Nov. 14,2001,the state of horizontal movement has changed explicitly after the earthquake.
In this paper,we have calculated the horizontal movement rate of GPS sites in northeastern margin of the Qinghai Tibet block by use of GPS observing data from 1999 to 2003.It is found that Gan Qing block can be divided into west block and east block,and there is a explicit difference of movement state between the two blocks.By the influence of Kunlun 8.1 earthquake on Nov. 14,2001,the state of horizontal movement has changed explicitly after the earthquake.
引文
1 国家地震局地质研究所和兰州地震研究所.祁连山河西走廊活动断裂系[M].北京:地震出版社,1993.1 GeologicalInstitute&LanzhouSeismologicalInstituteofStateSeismologicalBureau.ActivefaultsystemofQilianMountainHexicorridorregion[M ].Beijing:SeismologicalPress,1993.(inChinese)
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4 江在森,张希,崔笃信,等.青藏块体东北缘近期水平运动与形变[J].地球物理学报,2001,44(5):639～644.4 JiangZaisen,ZhangXi,CuiDuxin,etal.RecenthorizontalmovementanddeformationinthenortheastmarginofQing haiTibetblock[J].ChineseJournalofGeophysics,2001,44(5):639-644.(inChinese)
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7 陈兵,江在森,马文静,等.青藏块体东北缘断层形变与中强地震[J].大地测量与地球动力学,2002,22(4):49～55.7 ChenBing,JiangZaisen,MaWenjing,etal.Faultdeforma tionandmoderate strongearthquakesinnortheasternmar ginofQinghaiTibetblock[J].JournalofGeodesyandGeo dynamics,2002,22(4):49-55.(inChinese)
8 张希,江在森,王双绪,等.青藏块体及周缘潜在震源与强震关系研究[J].大地测量与地球动力学,2003,23(1):35～41.8 ZhangXi,JiangZaisen,WangShuangxu,etal.Studyonre lationshipofpotentialhypocentertostrongearthquakesinQinghaiTibetblockanditsmargins[J].JournalofGeodesyandGeodynamics,2003,23(1):35-41.(inChinese)
9 王庆良,等.青藏块体东北缘现今地壳运动[J].大地测量与地球动力学,2002,22(4):12～16.9 WangQingliang,etal.presentcrustalmovementinnorth eastmarginofQinghaiTibetblock[J].JournalofGeodesyandGeodynamics,2002,22(4):12-16.(inChinese)
10 牛之俊,等.中国地壳运动速率场[J].大地测量与地球动力学,2003,23(3):4～8.10 NiuZhijun,etal.VelocityfieldsofcrustmovementofChi na:comparisonbetweenresultswithGAMITandGISPY[J].JournalofGeodesyandGeodynamics,2003,23(3):4-8.(inChinese)
11 向宏发,虢顺民,陈志泰,等.祁连块体的旋转运动与区域地震活动的时空分布[M ].中法合作活断层对比研究.北京:地震出版社,1993,84～93.11 XiangHongfa,GuoShunmin,ChenZhitai,etal.RotationalmovementoftheQilianblockandtheregionaltime spacedistributionofearthquake[A].ComparisonStudyingofAc tiveFaultsonChinaFranceCooperation[C].Beijing:Seis mologicalPress,1993,84-93.(inChinese)
12 张晓亮,等.青藏块体东北缘新近水平运动变形与孕震特征[J].大地测量与地球动力学,2004,24(待刊)12 ZhangXiaoliang,etal.RecenthorizontalmovementanddeformationofnorthjeasternmarginofQinghaiTibetblockandearthquakegestationfeatures[J].JournalofGeodesyandGeodynamics,2004,24(Spec.).
2 国家地震局鄂尔多斯块体周边活动断裂研究组.鄂尔多斯块体周边活动断裂系[M ].北京:地震出版社,1988.2 ResearchgroupofactivefaultsystemalongtheborderofOrdosblock,StateSeismologicalBureau.ActivefaultsystemalongtheborderofOrdosblock[M ].Beijing:SeismologicalPress,1988.(inChinese)
3 国家地震局兰州地震研究所.昌马活动断裂系[M ].北京:地震出版社,1992.3 LanzhouSeismologicalInstituteofStateSeismologicalBu reau.Changmaactivefaultsystem[M ].Beijing:Seismologi calPress,1992.(inChinese)
4 江在森,张希,崔笃信,等.青藏块体东北缘近期水平运动与形变[J].地球物理学报,2001,44(5):639～644.4 JiangZaisen,ZhangXi,CuiDuxin,etal.RecenthorizontalmovementanddeformationinthenortheastmarginofQing haiTibetblock[J].ChineseJournalofGeophysics,2001,44(5):639-644.(inChinese)
5 张晓亮,江在森,陈兵,等.对青藏东北缘现今块体划分、运动及变形的初步研究[J].大地测量与地球动力学,2002,22(1):63～67.5 ZhangXiaoliang,JiangZaisen,ChenBing,etal.Preliminaryresearchonpresentblockdemarcation,movementanddefor mationinnortheastmarginofQinghaiTibetblock[J].Jour nalofGeodesyandGeodynamics,2002,22(1):63-67.(inChinese)
6 王双绪,张希,张四新.甘宁青地区现今构造形变异常与地震[J].大地测量与地球动力学,2002,22(4):44～48.6 WangShuangxu,ZhangXiandZhangSixin.ResenttectonicdeformationanomalyandearthquakesinGansuNingxiaQinghaiarea[J].JournalofGeodesyandGeodynamics,2002,22(4):44-48.(inChinese)
7 陈兵,江在森,马文静,等.青藏块体东北缘断层形变与中强地震[J].大地测量与地球动力学,2002,22(4):49～55.7 ChenBing,JiangZaisen,MaWenjing,etal.Faultdeforma tionandmoderate strongearthquakesinnortheasternmar ginofQinghaiTibetblock[J].JournalofGeodesyandGeo dynamics,2002,22(4):49-55.(inChinese)
8 张希,江在森,王双绪,等.青藏块体及周缘潜在震源与强震关系研究[J].大地测量与地球动力学,2003,23(1):35～41.8 ZhangXi,JiangZaisen,WangShuangxu,etal.Studyonre lationshipofpotentialhypocentertostrongearthquakesinQinghaiTibetblockanditsmargins[J].JournalofGeodesyandGeodynamics,2003,23(1):35-41.(inChinese)
9 王庆良,等.青藏块体东北缘现今地壳运动[J].大地测量与地球动力学,2002,22(4):12～16.9 WangQingliang,etal.presentcrustalmovementinnorth eastmarginofQinghaiTibetblock[J].JournalofGeodesyandGeodynamics,2002,22(4):12-16.(inChinese)
10 牛之俊,等.中国地壳运动速率场[J].大地测量与地球动力学,2003,23(3):4～8.10 NiuZhijun,etal.VelocityfieldsofcrustmovementofChi na:comparisonbetweenresultswithGAMITandGISPY[J].JournalofGeodesyandGeodynamics,2003,23(3):4-8.(inChinese)
11 向宏发,虢顺民,陈志泰,等.祁连块体的旋转运动与区域地震活动的时空分布[M ].中法合作活断层对比研究.北京:地震出版社,1993,84～93.11 XiangHongfa,GuoShunmin,ChenZhitai,etal.RotationalmovementoftheQilianblockandtheregionaltime spacedistributionofearthquake[A].ComparisonStudyingofAc tiveFaultsonChinaFranceCooperation[C].Beijing:Seis mologicalPress,1993,84-93.(inChinese)
12 张晓亮,等.青藏块体东北缘新近水平运动变形与孕震特征[J].大地测量与地球动力学,2004,24(待刊)12 ZhangXiaoliang,etal.RecenthorizontalmovementanddeformationofnorthjeasternmarginofQinghaiTibetblockandearthquakegestationfeatures[J].JournalofGeodesyandGeodynamics,2004,24(Spec.).
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