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首页> 外文期刊>Journal of Asian earth sciences >The 2016 Mw 6.0 Hutubi earthquake: A blind thrust event along the northern Tian Shan front
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The 2016 Mw 6.0 Hutubi earthquake: A blind thrust event along the northern Tian Shan front

机译：2016年胡图比Mw 6.0地震：北天山前线的一次盲冲事件

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摘要

The Tian Shan Range, which trends E-W along the southern margin of the Junggar Basin, is one of the longest and most active intracontinental orogenic belts in central Asia. On 8 December 2016 (05:15:04 UTC), a Mw 6.0 earthquake ruptured the northern Tian Shan front. Here, we use Sentinel-1 radar imagery to investigate the deformation and source parameters related to this event. The co-seismic surface deformation was predominated by uplift without surface rupture. Ascending and descending interferograms indicate that the event triggered small co-seismic deformations with maximum line-of-sight displacements of 22 mm and 24 mm, respectively. Although the north-dipping and south-dipping plane solutions can both fit the observations well, the north-dipping solution with a dip of 58 degrees is preferred in consideration of the relocated aftershocks and regional geological structure. Significant slip is located between depths of 12 km and 17 km, suggesting that the event was caused by a completely blind thrust fault. This blind rupture is characterized largely by a compact thrusting patch with a peak slip of 56 cm at a depth of 13 km. The source model generates a geodetic moment of 6.678 x 10(17) N m corresponding to a Mw 5.85 event. Both the interferometric synthetic aperture radar modeling and the aftershock locations indicate that the rupture plane is linked to the Huoerguosi-Manas-Tugulu fault at a depth of similar to 16 km, a typical locking depth in the Tian Shan. We suggest that the 2016 Hutubi earthquake more likely occurred on a back-thrust of the Huoerguosi-Manas-Tugulu fault, and the back-thrust is interpreted to represent a preexisting normal fault beneath the Qigu anticline belt that was tectonically inverted during the Cenozoic.
机译：天山山脉沿准gar尔盆地南缘呈东-西走向，是中亚最长，最活跃的陆内造山带之一。 2016年12月8日（世界标准时间05:15:04），一场6.0级Mw地震使北天山前锋破裂。在这里，我们使用Sentinel-1雷达图像来调查与此事件相关的变形和震源参数。同震表面变形主要由隆起作用而不引起表面破裂。干涉图的上升和下降指示该事件触发了较小的同震变形，最大视线位移分别为22 mm和24 mm。尽管北向和南向的平面解都可以很好地拟合观测结果，但考虑到重新安置的余震和区域地质结构，北向的北倾解最好为58度。明显的滑动位于12 km和17 km的深度之间，表明该事件是由完全盲目的逆冲断层引起的。这种盲裂的主要特征是在13 km的深度有56 cm的峰值滑移的致密的冲断片。源模型生成的大地矩为6.678 x 10（17）N m，对应于Mw 5.85事件。干涉式合成孔径雷达建模和余震位置均表明，破裂面在约16 km（天山的典型锁定深度）深度处与霍尔果斯－玛纳斯－图古卢断层相关。我们认为2016年的胡图壁地震更有可能发生在霍尔果斯-玛纳斯-图古鲁断裂的逆冲作用上，而该逆冲作用被解释为是奇古背斜带之下的一个早已存在的正断层，该断裂在新生代期间被构造反转了。

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  • 来源
    《Journal of Asian earth sciences》 |2019年第15期|79-87|共9页
  • 作者

    Wang Xiaohang; Xu Caijun; Wen Yangmao; Wang Shuai; Xu Guangyu; Xiao Zhuohui; Fang Lihua;

  • 作者单位

    Wuhan Univ, Sch Geodesy & Geomat, Wuhan, Hubei, Peoples R China;

    Wuhan Univ, Sch Geodesy & Geomat, Wuhan, Hubei, Peoples R China|Wuhan Univ, Key Lab Geospace Environm & Geodesy, Minist Educ, Wuhan, Hubei, Peoples R China|Wuhan Univ, Collaborat Innovat Ctr Geospatial Technol, Wuhan, Hubei, Peoples R China;

    Wuhan Univ, Sch Geodesy & Geomat, Wuhan, Hubei, Peoples R China|Wuhan Univ, Key Lab Geospace Environm & Geodesy, Minist Educ, Wuhan, Hubei, Peoples R China|Wuhan Univ, Collaborat Innovat Ctr Geospatial Technol, Wuhan, Hubei, Peoples R China;

    Wuhan Univ, Sch Geodesy & Geomat, Wuhan, Hubei, Peoples R China;

    Wuhan Univ, Sch Geodesy & Geomat, Wuhan, Hubei, Peoples R China;

    Wuhan Univ, Sch Geodesy & Geomat, Wuhan, Hubei, Peoples R China;

    China Earthquake Adm, Inst Geophys, Beijing, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Radar interferometry; Tian Shan; Hutubi earthquake; Rupture model; Thrust faulting; Seismic hazard;

    机译：雷达干涉法;天山;呼图壁地震;破裂模型;冲断层;地震危险性;

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