用户名: 密码: 验证码:
青藏高原东北缘断层系统的大地震迁移概率及断层滑动速度的分段特征
详细信息    查看全文 | 推荐本文 |
  • 英文篇名:Migration probability of big earthquakes and segmentation of slip rates on the fault system in northeastern Tibetan Plateau
  • 作者:孙云强 ; 罗纲 ; 尹力 ; 石耀霖
  • 英文作者:SUN YunQiang;LUO Gang;YIN Li;SHI YaoLin;Key Laboratory of Computational Geodynamics of Chinese Academy of Sciences,College of Earth and Planetary Sciences,University of Chinese Academy of Sciences;School of Geodesy and Geomatics,Wuhan University;
  • 关键词:青藏高原东北缘 ; 黏弹塑性有限元模型 ; 地震循环 ; 地震迁移 ; 海原断层 ; 香山天景山断层
  • 英文关键词:Northeastern Tibetan Plateau;;Visco-elasto-plastic finite-element model;;Earthquake cycle;;Earthquake migration;;Haiyuan fault;;Xiangshan-Tianjingshan fault
  • 中文刊名:DQWX
  • 英文刊名:Chinese Journal of Geophysics
  • 机构:中国科学院计算地球动力学重点实验室中国科学院大学地球与行星科学学院;武汉大学测绘学院;
  • 出版日期:2019-05-13
  • 出版单位:地球物理学报
  • 年:2019
  • 期:v.62
  • 基金:国家自然科学基金(41574085,41590865,U1839027);; 中国地震科学实验场专项(2019CSES0112)资助
  • 语种:中文;
  • 页:DQWX201905008
  • 页数:17
  • CN:05
  • ISSN:11-2074/P
  • 分类号:97-113
摘要
青藏高原东北缘是青藏高原隆升、生长及变形前缘.区域地震活动频繁,且地震在其主要断层带之间时空迁移.为了研究区域大地震在主要断层带之间的迁移规律与概率,以及主要断层带大地震破裂的时空分布特征,本文建立了青藏高原东北缘地区的三维黏弹塑性有限元模型,模拟了区域断层系统的地震循环,得到了人工合成的万年时间尺度的地震目录.根据模拟的地震目录,并结合古地震数据,计算分析了大地震(MW≥7)在研究区各个主要断层带之间的迁移概率,探讨了黏度、高程、统计时间长度等因素对大地震在各主要断层带之间的迁移概率和大地震在各主要断层带上的发生概率的影响,并且初步调查了海原断层带和香山天景山断层带的大地震破裂时空分布特征.研究结果显示:继区域最近两次大地震(1920年海原断层带上的M8.5海原大地震和1927年香山天景山断层带上的M8古浪大地震)之后,下一次大地震(MW≥7)发生在海原断层上的概率最大,约为51%~81%;其次是在香山天景山断层上,概率约为9%~37%.模型结果显示,不同的青藏高原中下地壳上地幔黏度大小,对大地震在各个断层带之间的迁移规律和迁移概率的影响较小;而研究区的高程载荷对地震迁移则有显著的影响:高程载荷易于使得海原断层地震活动减弱及香山天景山断层的地震活动增强.研究结果也显示了青藏高原东北缘地区主要断层带的地震活动与断层滑动速率分布的分段性显著;大地震在断层带上的破裂位置并不固定,呈现不均匀性;并暗示了断层几何形状对地震活动、断层滑动速率分布与大地震破裂位置的控制作用.
        The northeastern Tibetan Plateau is the leading edge of uplift,growth and deformation of Tibetan Plateau.Earthquakes occur frequently here,showing the spatio-temporal migration between major fault zones.In order to study such migration and the spatio-temporal distribution of rupture zones caused by big earthquakes,we build a three-dimensional visco-elasto-plastic finite-element model to simulate earthquake cycles and seismicity(synthetic seismic catalog)in northeastern Tibetan Plateau.Based on the model results and paleoseismic data,we analyzemigration of big earthquakes(MW ≥7)on the major faults in this region,and investigate the effects of different viscosity values of mid-lower crust/upper mantle and topographic loading on earthquake migration and seismic activities on the Haiyuan and Xiangshan-Tianjingshan faults.The model results show that following the 1920 M8.5 Haiyuan earthquake and the 1927 M8.0 Gulang earthquake,the next big event(MW≥7)in northeastern Tibetan Plateau would be most likely to occur on the Haiyuan fault(51%~81%),and secondly,Xiangshan-Tianjingshan fault(9%~37%).We find that the viscosity of the mid-lower crust/upper mantle in northeastern Tibetan Plateau has little effect on the patterns of earthquake migration,but the topographic loading has a significant impact on regional earthquake migration.We also find that earthquakes are characterized by obvious segmentation on major faults in northeastern Tibetan Plateau,and the ruptured zones by big earthquakes are uneven on every fault.The model results also indicate the important effects of fault geometries on seismic activity,fault slip and seismic rupture zones.
引文
Burchfiel B C,Zhang P Z,Wang Y P,et al.1991.Geology of the Haiyuan fault zone,Ningxia-Hui autonomous region,China,and its relation to the evolution of the northeastern margin of the Tibetan Plateau.Tectonics,10(6):1091-1110,doi:10.1029/90tc02685.
    CavaliéO,Lasserre C,Doin M P,et al.2008.Measurement of interseismic strain across the Haiyuan fault(Gansu,China),by InSAR.Earth and Planetary Science Letters,275(3-4):246-257,doi:10.1016/j.epsl.2008.07.057.
    Chen M X.2007.Elasticity and Plasticity(in Chinese).Beijing:Science Press.
    Deng Q D,Chen S F,Song F M,et al.1986.Variations in the geometry and amount of slip on the Haiyuan(Nanxihaushan)fault zone,China and the surface rupture of the 1920 Haiyuan earthquake.∥Das S,Boatwright J,Scholz C H eds.Earthquake Source Mechanics.Washington,DC:American Geophysical Union,169-182,doi:10.1029/GM037p0169.
    Deng Q D,Liao Y H.1996.Paleoseismology along the range-front fault of Helan Mountains,north central China.Journal of Geophysical Research:Solid Earth,101(B3):5873-5893,doi:10.1029/95jb01814.
    Deng Q D,Cheng S P,Min W,et al.1999.Discussion on cenozoic tectonics and dynamics of Ordos block.Journal of Geomechanics(in Chinese),5(3):13-21.
    Ding G Y,Chen J,Tian Q J,et al.2004.Active faults and magnitudes of left-lateral displacement along the northern margin of the Tibetan Plateau.Tectonophysics,380(3-4):243-260,doi:10.1016/j.tecto.2003.09.022.
    Duan B C,Oglesby D D.2005.Multicycle dynamics of nonplanar strike-slip faults.Journal of Geophysical Research,110(B3):B03304,doi:10.1029/2004jb003298.
    Feng S Y,Gao R,Long C X,et al.2011.The compressive stress field of Yinchuan garben:deep seismic reflection profile.Chinese Journal of Geophysics(in Chinese),54(3):692-697,doi:10.3969/j.issn.0001-5733.2011.03.008.
    Gan W J,Zhang P Z,Shen Z K,et al.2007.Present-day crustal motion within the Tibetan Plateau inferred from GPS measurements.Journal of Geophysical Research,112(B8):B08416,doi:10.1029/2005jb004120.
    Gaudemer Y,Tapponnier P,Meyer B,et al.1995.Partitioning of crustal slip between linked,active faults in the eastern Qilian Shan,and evidence for a major seismic gap,the‘Tianzhu Gap’,on the western Haiyuan fault,Gansu(China).Geophysical Journal International,120(3):599-645,doi:10.1111/j.1365-246X.1995.tb01842.x.
    Harris R A,Simpson R W.1998.Suppression of large earthquakes by stress shadows:A comparison of Coulomb and rate-and-state failure.Journal of Geophysical Research:Solid Earth,103(B10):24439-24451,doi:10.1029/98jb00793.
    Hu Y,Wang K L,He J,et al.2004.Three-dimensional viscoelastic finite element model for postseismic deformation of the great 1960Chile earthquake.Journal of Geophysical Research:Solid Earth,109(B12):B12403,doi:10.1029/2004jb003163.
    Institute of Geology,China Earthquake Administration and Ninxia Bureau of Chinese Earthquake Administration.1990.Active Haiyuan Fault Zone Monograph,Special Publications on Active Fault Studies in China(in Chinese).Beijing:Seismological Press,286.
    Jolivet R,Lasserre C,Doin M P,et al.2013.Spatio-temporal evolution of aseismic slip along the Haiyuan fault,China:Implications for fault frictional properties.Earth and Planetary Science Letters,377-378:23-33,doi:10.1016/j.epsl.2013.07.020.
    Kanamori H,Anderson D L.1975.Theoretical basis of some empirical relations in seismology.Bulletin of the Seismological Society of America,65(5):1073-1095.
    King G C P,Stein R S,Lin J.1994.Static stress changes and the triggering of earthquakes.Bulletin of the Seismological Society of America,84(3):935-953.
    Li C Y,Zhang P Z,Yin J H,et al.2009a.Late Quaternary leftlateral slip rate of the Haiyuan fault,northeastern margin of the Tibetan Plateau.Tectonics,28(5):357-369,TC5010,doi:10.1029/2008tc002302.
    Li Q S,Liu M.2006.Geometrical impact of the San Andreas fault on stress and seismicity in California.Geophysical Research Letters,33(8):L08302,doi:10.1029/2005gl025661.
    Li Q S,Liu M.2007.Initiation of the San Jacinto fault and its interaction with the San Andreas fault:Insights from geodynamic modeling.Pure and Applied Geophysics,164(10):1937-1945,doi:10.1007/s00024-007-0262-z.
    Li Q S,Liu M,Zhang Q,et al.2007.Stress evolution and seismicity in the central-eastern United States:Insights from geodynamic modeling.The Geological Society of America Special Paper,425:149-166,doi:10.1130/2007.2425(11).
    Li Q S,Liu M,Zhang H.2009b.A 3-D viscoelastoplastic model for simulating long-term slip on non-planar faults.Geophysical Journal International,176(1):293-306,doi:10.1111/j.1365-246X.2008.03962.x.
    Li Y H,Liu M,Wang Q L,et al.2018.Present-day crustal deformation and strain transfer in northeastern Tibetan Plateau.Earth and Planetary Science Letters,487:179-189,doi:10.1016/j.epsl.2018.01.024.
    Lin A M,Hu J M,Gong W B.2015.Active normal faulting and the seismogenic fault of the 1739M~8.0Pingluo earthquake in the intracontinental Yinchuan Graben,China.Journal of Asian Earth Sciences,114:155-173,doi:10.1016/j.jseaes.2015.04.036.
    Liu B C,Yuan D Y,He W G,et al.1992.Risk analysis of strong earthquakes in west end of Haiyuan fault.Northwestern Seimological Journal(in Chinese),14(S1):49-56.
    Liu M,Stein S,Wang H.2011.2000years of migrating earthquakes in north China:How earthquakes in midcontinents differ from those at plate boundaries.Lithosphere,3(2):128-132,doi:10.1130/l129.1.
    Liu M,Luo G,Wang H,et al.2014.Long aftershock sequences in north China and central US:implications for hazard assessment in mid-continents.Earthquake Science,27(1):27-35.
    Liu M,Stein S.2016.Mid-continental earthquakes:Spatiotemporal occurrences,causes,and hazards.Earth-Science Reviews,162:364-386,doi:10.1016/j.earscirev.2016.09.016.
    Liu-Zeng J,Klinger Y,Xu X W,et al.2007.Millennial Recurrence of Large Earthquakes on the Haiyuan Fault near Songshan,Gansu Province,China.Bulletin of the Seismological Society of America,97(1B):14-34,doi:10.1785/0120050118.
    Lu Y Z,Yang S X,Chen L W,et al.2011.Mechanism of the spatial distribution and migration of the strong earthquakes in China inferred from numerical simulation.Journal of Asian Earth Sciences,40(4):990-1001,doi:10.1016/j.jseaes.2010.07.008.
    Luo G,Liu M.2010.Stress evolution and fault interactions before and after the 2008great Wenchuan earthquake.Tectonophysics,491(1-4):127-140,doi:10.1016/j.tecto.2009.12.019.
    Luo G,Liu M.2012.Multi-timescale mechanical coupling between the San Jacinto fault and the San Andreas fault,southern California.Lithosphere,4(3):221-229,doi:10.1130/l180.1.
    Ma Z J,Li X Z,Jin J Y.1992.The law interpretation and prediction of earthquake migration-earthquake migration of four seismic belts in China mainland.Seismology and Geology(in Chinese),14(2):129-139.
    Min W,Zhang P Z,Deng Q D.2000.The preliminary research on the regional ancient earthquake recurrence behavior.Acta Seismologica Sinica(in Chinese),22(2):163-170.
    Min W,Jiao D C,Chai C Z,et al.2003.Characteristics of the active Luoshan fault since late Pleistocene,north central China.Annals of Geophysics,46(5):997-1013.
    Molnar P,Deng Q D.1984.Faulting associated with large earthquakes and the average rate of deformation in central and eastern Asia.Journal of Geophysical Research:Solid Earth,89(B7):6203-6227,doi:10.1029/JB089iB07p06203.
    Oglesby D D,Archuleta R J.2003.The three-dimensional dynamics of a nonplanar thrust fault.Bulletin of the Seismological Society of America,93(5):2222-2235,doi:10.1785/0120020204.
    Okada Y.1985.Surface deformation due to shear and tensile faults in a half-space.Bulletin of the Seismological Society of America,75(4):1135-1154.
    Pollitz F F,Sacks I S.2002.Stress triggering of the 1999 Hector Mine earthquake by transient deformation following the 1992Landers earthquake.Bulletin of the Seismological Society of America,92(4):1487-1496,doi:10.1785/0120000918.
    Scholz C H.2002.The Mechanics of Earthquakes and Faulting.2nd ed.New York:Cambridge University Press,496.
    Shi Y L,Cao J L.2008.Effective viscosity of China continental lithosphere.Earth Science Frontiers(in Chinese),15(3):82-95.
    Shi Y L,Cao J L.2010.Some aspects in static stress change calculation-case study on Wenchuan earthquake.Chinese Journal of Geophysics(in Chinese),53(1):102-110,doi:10.3969/j.issn.0001-5733.2010.01.011.
    Stein R S,Barka A A,Dieterich J H.1997.Progressive failure on the north Anatolian fault since 1939 by earthquake stress triggering.Geophysical Journal International,128(3):594-604,doi:10.1111/j.1365-246X.1997.tb05321.x.
    Sun Y Q,Luo G.2018.Spatial-temporal migration of earthquakes in the northeastern Tibetan Plateau:Insights from a finite element model.Chinese Journal of Geophysics(in Chinese),61(6):2246-2264,doi:10.6038/cjg2018L0401.
    Tapponnier P,Xu Z Q,Roger F,et al.2001.Oblique stepwise rise and growth of the Tibet plateau.Science,294(5547):1671-1677,doi:10.1126/science.105978.
    Turcotte D L,Schubert G.1982.Geodynamics:Applications of Continuum Physics to Geological Problems.New York:John Wiley&Sons,450.
    Wallace R E.1987.Grouping and migration of surface faulting and variations in slip rates on faults in the Great Basin Province.Bulletin of the Seismological Society of America,77(3):868-876.
    Wan Y G,Shen Z K,Zeng Y H,et al.2007.Evolution of cumulative Coulomb failure stress in northeastern QinghaiXizang(Tibetan)Plateau and its effect on large earthquake occurrence.Acta Seismologica Sinica(in Chinese),29(2):115-129.
    Wang H,Liu J,Shen X H,et al.2010.Influence of fault geometry and fault interaction on strain partitioning within western Sichuan and its adjacent region.Science China Earth Sciences,53(7):1056-1070.
    Wang H Y,Gao R,Yin A,et al.2012.Deep structure geometry features of Haiyuan fault and deformation of the crust revealed by deep seismic reflection profiling.Chinese Journal of Geophysics(in Chinese),55(12):3902-3909,doi:10.6038/j.issn.0001-5733.2012.12.003.
    Wang S Y,Gao A J,Xu Z H,et al.2000.Relocation of earthquakes in northeastern region of Qinghai-Xizang plateau and characteristics of earthquake activity.Acta Seismologica Sinica(in Chinese),22(3):241-248.
    Wang X S,Lv J,Xie Z J,et al.2015.Focal mechanisms and tectonic stress field in the north-south seismic belt of China.Chinese Journal of Geophysics(in Chinese),58(11):4149-4162,doi:10.6038/cjg20151122.
    Wang Y P,Song F M,Li Z Y,et al.1990.Study on recurrence intervals of great earthquakes in the late Quaternary of XiangshanTianjingshan fault zone in Ningxia.Earthquake Research in China(in Chinese),6(2):15-24.
    Wang Y P,Ma J,Li C Y.2007.The migration characteristics of strong earthquakes on the north-south seismic belt and its relation with the south asia seismic belt.Seismology and Geology(in Chinese),29(1):1-14.
    Wen X Z,Ma S L,Xu X W,et al.2008.Historical pattern and behavior of earthquake ruptures along the eastern boundary of the Sichuan-Yunnan faulted-block,southwestern China.Physics of the Earth and Planetary Interiors,168(1-2):16-36,doi:10.1016/j.pepi.2008.04.013.
    Wu P P,Li Z,Li D H,et al.2014.Numerical simulation of stress evolution on Xianshuihe fault based on contact element model.Progress in Geophysics(in Chinese),29(5):2084-2091,doi:10.6038/pg20140514.
    Xiao J,He J K.2015.3D Finite-element modeling of earthquake interaction and stress accumulation on main active faults around the northeastern Tibetan Plateau edge in the past~100years.Bulletin of the Seismological Society of America,105(5):2724-2735,doi:10.1785/0120140342.
    Xu X W,Yeats R S,Yu G H.2010.Five short historical earthquake surface ruptures near the Silk Road,Gansu province,China.Bulletin of the Seismological Society of America,100(2):541-561,doi:10.1785/0120080282.
    Xu Z H,Wang S Y,Huang Y R,et al.1989.The tectonic stress field of Chinese continent deduced from a great number of earthquakes.Chinese Journal of Geophysics(Acta Geophysica Sinica)(in Chinese),32(6):636-647.
    Zang S X,Wei R Q,Liu Y G.2005.Three-dimensional rheological structure of the lithosphere in the Ordos block and its adjacent area.Geophysical Journal International,163(1):339-356,doi:10.1111/j.1365-246X.2005.02745.x.
    Zhang P Z,Molnar P,Burchfiel B C,et al.1988.Bounds on the Holocene slip rate of the Haiyuan fault,north-central China.Quaternary Research,30(2):151-164.
    Zhang P Z,Min W,Deng Q D,et al.2005.Paleoearthquake rupture behavior and recurrence of great earthquakes along the Haiyuan fault,northwestern China.Science in China Series D:Earth Sciences,48(3):364-375.
    Zhang P Z,Shen Z K,Wang M,et al.2004.Continuous deformation of the Tibetan Plateau from global positioning system data.Geology,32(9):809-812,doi:10.1130/g20554.1.
    Zhang W Q,Jiao D C,Zhang P Z,et al.1987.Displacement along the Haiyuan fault associated with the great 1920 Haiyuan,China,earthquake.Bulletin of the Seismological Society of America,77(1):117-131.
    Zhang Z G,Zhang W,Chen X F.2014.Three-dimensional curved grid finite-difference modelling for non-planar rupture dynamics.Geophysical Journal International,199(2):860-879,doi:10.1093/gji/ggu308.
    Zheng W J,Zhang P Z,He W G,et al.2013.Transformation of displacement between strike-slip and crustal shortening in the northern margin of the Tibetan Plateau:Evidence from decadal GPS measurements and late Quaternary slip rates on faults.Tectonophysics,584:267-280,doi:10.1016/j.tecto.2012.01.006.
    Zhou S Y.2008.Seismicity simulation in western Sichuan of China based on the fault interactions and its implication on the estimation of the regional earthquake risk.Chinese Journal of Geophysics(in Chinese),51(1):165-174.
    Zhu S B,Zhang P Z.2013.FEM simulation of interseismic and coseismic deformation associated with the 2008 Wenchuan Earthquake.Tectonophysics,584:64-80.
    陈明祥.2007.弹塑性力学.北京:科学出版社.
    邓起东,程绍平,闵伟等.1999.鄂尔多斯块体新生代构造活动和动力学的讨论.地质力学学报,5(3):13-21.
    酆少英,高锐,龙长兴等.2011.银川地堑地壳挤压应力场:深地震反射剖面.地球物理学报,54(3):692-697,doi:10.3969/j.issn.0001-5733.2011.03.008.
    国家地震局地质研究所,宁夏回族自治区地震局.1990.海原活动断裂带:中国活断层研究专辑.北京:地震出版社.
    刘白篪,袁道阳,何文贵等.1992.海原断裂带西端强震危险性分析.西北地震学报,14(S1):49-56.
    马宗晋,李献智,金继宇.1992.地震迁移的规律、解释和预报——中国大陆四条地震带的地震迁移.地震地质,14(2):129-139.
    闵伟,张培震,邓起东.2000.区域古地震复发行为的初步研究.地震学报,22(2):163-170.
    石耀霖,曹建玲.2008.中国大陆岩石圈等效粘滞系数的计算和讨论.地学前缘,15(3):82-95.
    石耀霖,曹建玲.2010.库仑应力计算及应用过程中若干问题的讨论——以汶川地震为例.地球物理学报,53(1):102-110,doi:10.3969/j.issn.0001-5733.2010.01.011.
    孙云强,罗纲.2018.青藏高原东北缘地震时空迁移的有限元数值模拟.地球物理学报,61(6):2246-2264,doi:10.6038/cjg2018L0401.
    万永革,沈正康,曾跃华等.2007.青藏高原东北部的库仑应力积累演化对大地震发生的影响.地震学报,29(2):115-129.
    王海燕,高锐,尹安等.2012.深地震反射剖面揭示的海原断裂带深部几何形态与地壳形变.地球物理学报,55(12):3902-3909,doi:10.6038/j.issn.0001-5733.2012.12.003.
    汪素云,高阿甲,许忠淮等.2000.青藏高原东北地区地震重新定位及其活动特征.地震学报,22(3):241-248.
    王晓山,吕坚,谢祖军等.2015.南北地震带震源机制解与构造应力场特征.地球物理学报,58(11):4149-4162,doi:10.6038/cjg20151122.
    汪一鹏,宋方敏,李志义等.1990.宁夏香山-天景山断裂带晚第四纪强震重复间隔的研究.中国地震,6(2):15-24.
    汪一鹏,马瑾,李传友.2007.南北地震带强震迁移特征及其与南亚地震带的联系.地震地质,29(1):1-14.
    吴萍萍,李振,李大虎等.2014.基于ANSYS接触单元模型的鲜水河断裂带库仑应力演化数值模拟.地球物理学进展,29(5):2084-2091,doi:10.6038/pg20140514.
    许忠淮,汪素云,黄雨蕊等.1989.由大量的地震资料推断的我国大陆构造应力场.地球物理学报,32(6):636-647.
    张培震,闵伟,邓起东等.2003.海原活动断裂带的古地震与强震复发规律.中国科学(D辑),33(8):705-713.
    周仕勇.2008.川西及邻近地区地震活动性模拟和断层间相互作用研究.地球物理学报,51(1):165-174.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700