最小二乘配置下的天山地区应变场特征分布
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
利用已有的GPS观测数据,借助球面最小二乘配置方法对天山地区的GPS速度场进行研究,得到了研究区域应变场的空间分布特征.其最大主压应变表明,大地震多发生在主压应变快速交替变化的地带,主压应变最大值主要分布于西南天山与帕米尔弧及塔里木西北交汇的地区,强地震(M7.0—8,0)基本发生在该区域.面膨胀值表明天山地区应变呈挤压收缩的特征.
This paper obtains the spatial distribution characteristics of strain rate field at the Tianshan region based on the available GPS velocity field by using the least squares collocations method in sphere surface.The maximum principal compressive strain result shows that strong earthquakes often occur at the zones where principal compressive strain always has been rapidly alternating from high value to low value.The maximum strain rate is located in the junction of southwestern Tianshan,Pamir arc and northwestern Tarim basin where several M7.0—8.0 earthquakes occurred in the past century.The surface dilation rate of the Tianshan region reveals that the Tianshan as a whole is uplifting due to compressive deformation.
引文
江在森,刘经南.2010.应用最小二乘配置建立地壳运动速度场与应变场的方法[J].地球物理学报,53(5):1109-1i17.Jiang Z S,Liu J N.2010.The method in establishing strain field and velocity field of crustal movement using least squares collocalion[J].Chinese Journal of Geophysics,53(5):1109-1117.doi:10.3969j.issn.0001-5733(in Chinese).
    李杰.王晓强,谭凯,刘代芹,帕尔哈提·再努拉,蒋靖祥.方伟.2010.北天山现今活动构造的运动特征[J].大地测量与地球动力学.30(6):1-5.Li J.Wang X Q,Tan K,Liu D Q,Paerhati·Z,Jiang J X,Fang W.2010.Analysis of movement characters of presentday active tectonics of northern Tianshan region[J].Journal of Geodesy and Geodynamics.30(6):1-5(in Chinese).
    李杰,王琪,王晓强,帕尔哈提·再努拉.刘代芹,朱治国,蒋靖祥.2012.南天山—帕米尔现代地壳形变特征与应变场分布[J].大地测量与地球动力学.32(1):1-4.Li J,Wang Q,Wang X Q.Paerhati·Z.Liu D Q,Zhu Z G.Jiang J X.2012.Characteristics of present crustal deformation and distribution of strain field in southern Tianshan-Pamir region[J].Journal of Geodesy and Geodynamics,32(1):1-4(in Chinese).
    李强,游新兆.杨少敏.杜瑞林,乔学军,邹蓉,王琪.2012.中国大陆构造变形高精度大密度GPS监测:现今速度场[J].中国科学:地球科学.42(5):629-632.Li Q,You X Z,Yang S M,Du R L,Qiao X J,Zou R.Wang Q.2012.A precise velocity field of tectonic deformation in China as inferred from intensive GPS observations[J].Science China Earth Sciences,55(5):695-698.doi:10.1007/s11430-012-4412-5.
    刘绍文.王良书,李成,张鹏,李华.2006.塔里木盆地岩石圈热-流变学结构和新生代热体制[J].地质学报,80(3):344-350,Liu S W,Wang L S,Li C Zhang P,Li H.2006.Lithospheric thermo-rheoiogical structure and Cenozoic thermal regime in the Tarim basin,Northwest China[J].Acta Geologica Sinica,80(3):344-350(in Chinese).
    马宗晋.张培震,任金卫,冯锐,张进.2003.从GPS水平矢量场对中国及全球地壳运动的新认识[J].地球科学进展。18(1):4-11.Ma Z J.Zhang P Z.Ren J W,Feng R,Zhang J.2003.New cognitions on the global and Chinese continental crustal movements from GPS horizontal vector fields[J].Advunces in Earth Science,18(1):1-11(in Chinese).
    牛之俊,游新兆,杨少敏.2007.利用GPS分析天山现今地壳形变特征[J].大地测量与地球动力学.27(2):1-9.Niu Z J,You X Z,Yang S M.2007.Analysis of contemporary crustal deformation characteristics with GPS data of Tianshan mountain[J].Journal of Geodesy and Geodynamics,27(2):1-9(in Chinese).
    王琪.2003.中国大陆现今地壳运动研究[J].地震学报,25(5):541-547.
    Wang Q.2003.Current crustal movement in Chinese mainland[J].Acta Seismologica Sinica,25(5):541-547(in Chinese).
    王晓强,李杰,Alexander Z,王琪,2007.利用GPS形变资料研究天山及邻近地区地壳水平位移与应变特征[J].地震学报,29(1):31-37.Wang X Q,Li J,Alexander Z,Wang Q.2007.Horizontal movement and strain characteristics in Tianshan and its adjacent region with GPS deformation data[J].Acta Seismologica Sitiica,29(1):31-37(in Chinese).
    魏素花,薛光琦,钱辉,姜枚,Poupinet G,Edi K.2000.新疆库车-克拉玛依地震层析成像[J].地球物理学进展,15(4):46-54.Wei S H,Xue G Q,Qian H.Jiang M,Poupinet G,Edi K.2000.Xinjiang Kuche-Kelamayi seismic tomography[J].Progress in Geophysics,15(4):46-54(in Chinese).
    武艳强,江在森,杨国华,方颖.王武星.2009.利用最小二乘配置在球面上整体解算GPS应变场的方法及应用[J].地球物理学报,52(7):1707-1714.Wu Y Q,Jiang Z S.Yang G H,Fang Y.Wang W X.2009.The application and method of GPS strain calculating in whole mode using least square collocation in sphere surface[J].Chinese Journal of Geophysics,52(7):1707-1714.doi:10.3969/j.issn.00015733.2009.07.005(in Chinese).
    杨章,戈澍谟.1980.对1931年新疆富蕴地震断裂带及构造运动特征的初步认识[J].地震地质,2(3):31-37.Yang Z,Ge S M.1980.Preliminary study of the fracture zone by 1931 Fuyun earthquake and the features of Neotectonic movement[J].Seismology and Geology,2(3):31-37(in Chinese).
    杨少敏,李杰,王琪.2008.GPS研究天山现今变形与断层活动[J].中国科学:D辑,38(7):872-880.Yang S M,Li J,Wang Q.2008.The deformation pattern and fault rate in the Tian.shan Mountains inferred from GPS observations[J].Science in China:Series D,51(8):1064-1080.doi:10.1007/sl1430-008-0090-8.
    杨宗仁,尹荷中,顾焕明.1986.试论准噶尔盆地的基底[J].大地构造与成矿学,10(3):263-271.Yang Z R,Yin H Z.Gu H M.1986.On the basement of Junggar Basin[J].Geolectonica el Metallogenia,10(3):263-271(in Chinese).
    张国民,汪素云,李丽,张晓东,马宏生.2002.中国大陆地震震源深度及其构造含义[J].科学通报.47(9):663 668.Zhang G M,Wang S Y,Li L,Zhang X D,Ma H S.2002.Focal depth research of earthquakes in Mainland China:Implication for tectonics[J].Chinese Science Bulletin,47(12):969-974.
    张培震,邓起东,杨晓平,彭斯震,徐锡伟.1996.天山的晚新生代构造变形及其地球动力学问题[J].中国地震,12(2):127-140.Zhang P Z,Deng Q D.Yang X P,Peng S Z,Xu X W.1996.Late Cenozoic tectonic deformation and mechanism along the Tianshan Mountain,northwestern China[J].Earthquake Research in China,12(2):127-140(in Chinese).
    Avouac J P,Tapponnier P,Bai M,You H,Wang G.1993.Active thrusting and folding along the northern Tien Shan and Late Cenozoic rotation of the Tarim relative to Dzungaria and Kazakhstan[J].J Geophys Res,98(B4):6755—6804.doi110.1029/92JB01963.
    Kogan M C,Grigory M S,Robert W K,Thomas A H,Dmitry I F,Sergei G E,Vasily Y L,Arthur L,Angus J.2000.Geodetic constraints on the relative motion and rigidity of Eurasia and North America[J].Geophys Res Lett,27(14):2041-2044.
    Ward S N.1994.A multidisciplinary approach to seismic hazard in southern California[J].Bull Seismol Soc Am,84(5):1293-1309.
    Wessel P,Smith W H F.1991.Free software helps map and display data[J].EOS Trans AGU,72(41):441-446.doi:10.1029/90E000319.
    Wu Y Q,Jiang Z S,Yang G H,Wei W X,Liu X X.2011.Comparison of GPS strain rate computing methods and their reliability[J].Geophys]Int,185(2):703-717.doi:10.1111/j.1365-246X.2011.04976.x.
    Zubovich A V,Wang X Q,Yuri G S,Gennady G S,Robert R,Christoph R,Olga I M,Peter M,Wasili M,Vladimir I M,Li J,Sergey IK,Thomas AH,Michael W H,Bradford H H,Dang Y M,Vitaly D B,Rinat T B.2010.GPS velocity field for the Tien Shan and surrounding regions[J].Tectonics,29(6):TC6014.doi:10.1029/2010TC002772.

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