北京地区近十年应变场变化特征
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摘要
北京地区1995～2005年不同时段的应变率揭示出:1995～1996年和1996～1999年的最大剪应变率较大,与1996～1999年阴山燕山南缘构造带、张家口渤海构造带的地震相对活跃的时段基本一致;1999～2001年和2001～2004年为应变率相对较小的时段,而这两个构造带的地震也相对平静;北京地区各时段的最大剪应变率等值线的最大值都在10-7/a以上,表明该区为构造蠕变较强烈的地段。
The strain rates in the different period during 1995-2005 in Beijing area indicate that the maximal shear strain rates, in the periods during 1995-1996 and 1996-1999, were larger than those in other periods and basically consistent with the period during 1996-1999 in which the seismic activity in Yinshan-Yanshan southern margin and Zhangjiakou-Bohai tectonic zones was high.In the periods during 1999-2001 and 2001-2004, the strain rates were relatively small while the seismic activity of this two tectonic zones were relatively low also. In Beijing area all of the maxima of the maximal shear strain rate in above every period reached over 10+7/a, it indicates that this area is a segment of strong tectonic creep.
The strain rates in the different period during 1995-2005 in Beijing area indicate that the maximal shear strain rates, in the periods during 1995-1996 and 1996-1999, were larger than those in other periods and basically consistent with the period during 1996-1999 in which the seismic activity in Yinshan-Yanshan southern margin and Zhangjiakou-Bohai tectonic zones was high.In the periods during 1999-2001 and 2001-2004, the strain rates were relatively small while the seismic activity of this two tectonic zones were relatively low also. In Beijing area all of the maxima of the maximal shear strain rate in above every period reached over 10+7/a, it indicates that this area is a segment of strong tectonic creep.
引文
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2王若柏,杨国华,耿士昌,等.北京地区地壳形变场及其动态特征[J].地震地质,1994,16(1):1～9.2WangRuobai,YangGuohuaandGengShichang,etal.ThecrustaldeformationfieldandIt’sdynamicfeaturesinBeijingarea[J].SeismologyandGeology,1994,16(1):1～9.(inChinese)
3应绍奋,张祖胜,耿士昌,等.中国大陆垂直向现代地壳运动基本特征[J].中国地震,1988,4(4):1～8.3YingShaofen,ZhangZusheng,GengShichang,etal.BasiccharacteristicsofrecentvertialcrustalmovementofChinamainland[J].EarthquakeResearchinChina,1988,4(4):1～8.(inChinese)
4焦青,等.北京地区八宝山黄庄高丽营断裂的活动与地震[J].大地测量与地球动力学,2005,25(4):50～54.4JiaoQing,etal.AnalysisontectonicactivityandseismicityofBabaoshanHuangzhuangGaoliyingfaultinBeijingregion[J].JournalofGeodesyandGeodynamics,2005,25(4):50-54.(inChinese)
5刘善华,等.强震孕育与断层形变异常形态及时空分布特征[J].大地测量与地球动力学,2004,24(4):48～56.5LiuShanhua,etal.FormoffaultdeformationanomalyandtimespacecharacteristicsofdevelopmentofstrongearthquakesinNorthChina[J].JournalofGeodesyandGeodynamics,2004,24(4):48-56.(inChinese)
6王若柏,黄立人.北京地区的水平形变及其构造含义[J].地震地质,1984,6(4):17～23.6WangRuobaiandHuangLiren.HorizontaldeformationanditsgeotectonicimplicationintheBeijingarea[J].SeismologyandGeology,1984,6(4):17～23.(inChinese)
7杨国华,韩月萍,周晓燕.华北地壳运动新特征[J].大地测量与地球动力学,2002,22(3):28～33.7YangGuohua,HanYuepingandZhouXiaoyan.NewfeaturesofcrustalmotioninNorthChina[J].JournalofGeodesyandGeodynamics,2002,22(3):28-33.(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位错反演[J].大地测量与地球动力学,2002,22(3):40～45.8ZhangXi,JiangZaisen,ZhangXiaoliang,etal.AseismicnegativedislocationinversionofrecenthorizontalcrustmovementinnorthChina[J].JournalofGeodesyandGeodynamics,2002,22(3):40-45.(inChinese)
9许才军,李志才,王华.华北地区活动地块运动时空变化特征[J].大地测量与地球动力学,2002,22(2):33～40.9XuCaijun,LiZhicaiandWangHua.Thetemporalandspatialvariationcharacteristicsofcrustaldeformationofactivetectonicblocks[J].JournalofGeodesyandGeodynamics,2002,22(2):33-40.(inChinese)
10张跃刚,胡新康.华北地区块体及其边界的相对运动[J].大地测量与地球动力学,2005,25(1):47～50.10ZhangYuegangandHuXinkang.RelativemotionbetweenplatesandtheirboundariesinnorthChina[J].JournalofGeodesyandGeodynamics,2005,25(1):47-50.(inChinese)
11黄秀铭,汪良谋,徐杰,等.北京地区新构造运动特征[J].地震地质,1991,13(1):43～51.11HuangXiuming,WangLiangmouandXuJie,etal.CharacteristicsofneotectonicmovementinBeijingarea[J].SeismologyandGeology,1991,13(1):43-51.(inChinese)
12马杏垣主编.中国岩石圈动力学纲要[M].北京:地质出版社,1987.12MaXingyuan(ChiefEditor).LithosphericdynamicssummaryofChina[M].GeologicalPress,1987.(inChinese)
13李延兴,杨国华,李智,等.中国大陆活动地块与应变状态[J].中国科学(D辑),2003,33(D辑增刊):65～81.13LiYanxing,YangGuohua,LiZhi,etal.MovementandstrainconditionsofactiveblocksintheChinesemainland[J].ScienceinChina,2003,33(SeriesD,Supplement):65-81.(inChinese)
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