云南鲁甸“8·03”地震地表破裂与大型地震滑坡
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
云南鲁甸"8·03"地震造成重大的人员伤亡和财产损失,诱发大量次生山地灾害。根据实地考察和遥感解译,在地震烈度Ⅸ度区内发现一条地震地表破裂带,沿破裂带发育有4个(特)大型滑坡和一个高危堰塞湖。该破裂带具有典型的右旋走滑特征,系右旋走滑断层活动的结果。根据其发育特征,该断层应为"包谷垴-小河断裂"沿小河-乐红镇方向的延伸部分,对地震灾区次生山地灾害的分布起着重要的控制作用,也是4个大型滑坡形成的重要动力来源。综合分析断层的位置特征和大型地震灾害的分布情况,推断该断层为本次地震的发震断层。建议进一步加强该发震断层诱发次生山地灾害的调查与分析,防止次生山地灾害造成新的危害。
The August 3,2014 Ludian Earthquake( Ms 6. 5)( "8 ·03" Ludian Earthquake),resulted in more than 600 deaths and significant property losses,has induced thousands of secondary geo-hazards. According to field investigation and remote sensing interpretation,it was found that there was an earthquake surface rupture zone with four large-scale landslides and a high-risk quake-lake around it in the Ⅸ- degree seismic intensity area. The zone is characterized by typical right-lateral strike-slip,which means that it caused by the activity of a right-lateral strike-slip fault. Therefore,the earthquake surface rupture is an outcrop of the fault. According to the features of the outcrop,it should be an extension of Baogunao- Xiaohe Fault along the direction from Xiaohe to Lehong towns( NW- SE). The fault,which controlled the distribution of secondary geo-hazards induced by the earthquake,was an important factor for the formation of the four large-scale landslides. Based on analysis of the fault location features and the distribution of the four large-size landslides,it was convinced that the fault was also seismogenic fault of the earthquake and characterized by right-lateral strike-slip. It was suggested that the investigation and prediction research of secondary geo-hazards induced by the seismogenic fault should be strengthened to prevent new damages by the secondary geo-hazards.
引文
[1]中国地震台网.云南省昭通市鲁甸县6.5级/地震[EB/OL].http://news.ceic.ac.cn/CC 20140803163010.html,2014-08-20
    [2]中央政府门户网站.云南:鲁甸地震抗震救灾取得阶段性成果[EB/OL].http://www.gov.cn/xinwen/2014-08/13/content_2734456.htm,2014-08-20
    [3]Huang Runqiu.Mechanism and geomechanical modes of landslide hazards triggered by Wenchuan 8.0 earthquake[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(6):1239-1249[黄润秋.汶川8.0级地震触发崩滑灾害机制及其地质力学模式[J].岩石力学与工程学报,2009,28(6):1239-1249]
    [4]Huang Runqiu,Li Weile.Fault effect analysis of geo-hazard triggered by Wenchuan earthquake[M].Journal of Engineering Geology,2009,17(1):19-28[黄润秋,李为乐.汶川大地震触发地质灾害的断层效应分析[J].工程地质学报,2009,17(1):19-28]
    [5]Ran Yongkang,Shi Xiang,Wang Hu,et al.The maximum coseismic vertical surface displacement and surface deformation pattern accompanying the Ms 8.0 Wenchuan earthquake[J].Chinese Science Bulletin,2009,55(9):841-850
    [6]Ye Wenhua,Xu Xiwei,Wang Liangmou.Quantitative relationship between surface rupture parameter,earthquake magnitude and recurrence interval for surface-rupturing-earthquakes in wwest China[J].Seismology and Geology,1996,18(1):37-44[叶文华,徐锡伟,汪良谋.中国西部强震的地表破裂规模与震级、复发时间间隔关系的研究[J].地震地质,1996,18(1):37-44]
    [7]Li Yong,Zhou Rongjun,Alexander L.Dendmore,et al.Surface rupture and deformation of the Yingxiu-Beichuan fault by the Wenchuan earthquake[J].Acta Geologica Sinica,2008,82(12):1688-1706[李勇,周荣军,Alexander L.Dendmore,等.映秀-北川断裂的地表破裂与变形特征[J].地质学报,82(12):1688-1706]
    [8]Zhang Peizhen,Xu Xiwei,Wen Xueze,et al.Slip rates and recurrence intervals of Longmen Shan active fault zone,and tectonic implications for the mechanism of the May 12 Wenchuan earthquake,2008,Sichuan,China[J].Chinese Journal of Geophysics,2008,51(4):1066-1073[张培震,徐锡伟,闻学泽,等.2008年汶川8.0级地震发震断裂的滑动速率、复发周期和构造成因[J].地球物理学,2008,51(4):1066-1073]
    [9]Deng Zhihui,Yang Zhuen,Sun Zhaomin,et al.Complicated phenomena of the Beichuan-Yingxiu surface fracture zone during Wenchuan Ms 8.0 earthquake in Sichuan Province,China[J].Chinese Science Bulletin,53(24):3891-3896
    [10]Chen Guihua,Xu Xiwei,Zheng Rongzhang,et al.Quantitative analysis of the co-seismic surface rupture of the 2008 Wehchuan earthquake,Sichuan,China along the Beichuan-Yingxiu fault[J].Seismology and Geology,2008,30(3):723-738[陈桂华,徐锡伟,郑荣章,等.2008年汶川Ms8.0地震地表破裂变形定量分析[J].地震地质,2008,30(3):723-738]
    [11]Xu Xiwei,Wen Xueze,Ye Jianqing,et al.The Ms8.0 Wenchuan earthquake surface ruptures and its seismogenic structure[J].Seismology and Geology,2008,30(3):597-629[徐锡伟,闻学泽,叶建青,等.汶川Ms8.0地震地表破裂带及其发震构造[J].地震地质,30(3):597-629]
    [12]Wang Qingliang,Cui Duxin,Zhang Xi,et al.Coseismic vertical deformation of the MS8.0 Wenchuan earthquake from repeated levelings and its constraint on listric fault geometry[J].Earthq Sci,2009,22(6):595-602
    [13]Deng Qidong,Yu Guijun,Ye Wenhua.Study on the relationship between surface rupture parameters and the magnitude of earthquake[G]//Research theory and application of active faults(2).Beijing:Seismological Press,1993.[邓起东,于贵军,叶文华.地震地表破裂参数与震级关系研究[G]//活动断裂研究理论与应用(2).北京:地震出版社,1993.]
    [14]Zhang Zhuoyuan,Wang Shitian,Wang Lansheng,et al.Analytical principle of engineering geology[M].Beijing:Geology Publishing House,1994.[张倬元,王士天,王兰生,等.工程地质分析原理[M].地质出版社,1994.]

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