地震地质 ›› 2005, Vol. 27 ›› Issue (3): 374-381.

• 研究论文 • 上一篇    下一篇

鄂尔多斯北缘断陷盆地区强震孕育的卫星遥感影像研究

李建华   

  1. 中国地震局地质研究所, 地震动力学国家重点实验室, 北京, 100029
  • 收稿日期:2004-12-24 修回日期:2005-06-02 出版日期:2005-09-08 发布日期:2009-10-27
  • 作者简介:李建华,男,1941年生,1966年毕业于华东师范大学地质地理系地貌专业,研究员,主要从事遥感地质、活动构造研究,电话:010-62009047.
  • 基金资助:
    地震科学联合基金(304021)资助。中国地震局地质研究所论著2005B0022。

RESEARCH ON THE SATELLITE REMOTE SENSING IMAGES INDICATIVE OF STRONG EARTHQUAKE PREPARATION IN THE ORDOS NORTH MARGINAL FAULT BASIN REGION

LI Jian-hua   

  1. Institute of Geology, China Earthquake Administration, State Key Laboratory of Earthquake Dynamics, Beijing 100029, China
  • Received:2004-12-24 Revised:2005-06-02 Online:2005-09-08 Published:2009-10-27

摘要: 利用多时相、多波段卫星图像,研究1979年五原6.0级地震、1989年大同-阳高6.1级地震和1996年包头西6.4级地震震区的构造活动信息,结合前人的烈度调查资料,探讨这些强震发生的地质构造环境。研究表明:1979年五原6.0级地震发生在NE向海子堰断裂与NW向五原西断裂交会的部位。五原6.0级地震高烈度区等震线长轴呈NE向,与海子堰断裂一致,是五原地震的发震构造。1996年包头西6.4级地震发生在由陡崖和沟槽地貌显示的NEE向乌拉山北缘断裂与NW向新生砂石厂断裂交会的部位。包头西6.4级地震高烈度区等震线长轴呈NE向,与乌拉山北缘断裂接近,该断裂是包头西6.4级地震的发震构造。2次地震高烈度区长轴与低烈度区长轴走向相差近90°,这是因为除发震构造外,烈度区还受一组与之交会的共轭断裂活动的影响。1989年大同-阳高6.1级地震,发生在从六棱山腹地向大同-阳高盆地延伸的NNE向大王村-西要泉断裂上,该断裂是大同-阳高地震的发震构造。

关键词: 鄂尔多斯北缘, 断陷盆地区, 强震孕育, 卫星遥感影像, 发震构造

Abstract: The information of tectonic movement in the earthquake-stricken areas of the 1979 MS 6.0 Wuyuan earthquake,the 1989 MS 6.1 Datong-Yanggao earthquake and the 1996 MS 6.4 west Baotou earthquake are studied by using multi-phase and multi-channel satellite images. Furthermore,the geologic-tectonic background of these earthquakes is discussed by combining the obtained results with the existing seismic intensity investigation data. The results of this study show that the 1979 MS 6.0 Wuyuan earthquake occurred at the convergence of the NE-trending Haiziyan Fault and the NW-trending west Wuyuan Fault,as indicated by tone difference and micro-morphologic features on satellite images. The long axis of the high intensity isoseism of this earthquake is NE-trending,consistent with the Haiziyan Fault,which is therefore assumed to be the seismogenic fault of this earthquake. The long axis of the low intensity isoseism of this earthquake is NW-trending,indicating the effect of the NW-trending west Wuyuan Fault. The 1989 MS 6.1 Datong-Yanggao earthquake occurred on the NEE-trending Dawangcun-Xi'anquan Fault which extends from the hinterland of the Liulengshan Mountains to Datong-Yanggao basin,as indicated by micro-morphologic and tone differences on the satellite images. The fault is consistent with the long axis of the isoseism of this earthquake as proposed by Su Zong-zheng et al. The 1996 MS 6.4 west Baotou earthquake occurred at the convergence of the Wulashan north marginal fault and the NW-trending Xinsheng Sand Yard Fault,as indicated by distinct scarp and groove landforms. The long axis of high intensity isoseism of this earthquake is NE-striking,sub-parallel to the NEE-trending Wulashan north marginal fault that is assumed to be the seismogenic structure of the west Baotou earthquake. The long axis of low intensity isoseism of this earthquake is NW-striking,which is considered to be the effect of the NW-trending Xinsheng Sand Yard Fault.

Key words: north margin of Ordos, fault basin region, strong earthquake preparation, satellite remote sensing image, seismogenic structures

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