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首页> 外文期刊>Pure and Applied Geophysics >A NE-Trending Oblique-Slip Fault Responsible for the 2016 Zaduo Earthquake (Qinghai, China) Revealed by InSAR Data
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A NE-Trending Oblique-Slip Fault Responsible for the 2016 Zaduo Earthquake (Qinghai, China) Revealed by InSAR Data

机译：负责2016年Zaduo地震（中国青海，中国）揭示的Ne-Tronding斜倾过断裂

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摘要

Twelve Sentinel-1 images are used to measure the surface displacements caused by the Zaduo earthquake on 17 October 2016 in Qinghai, China. Comprehensive analysis of the local geologic structure, focal mechanisms, relocated aftershocks, and fault geometrical parameters from nonlinear inversions of the InSAR data indicates that a NE-trending fault with a strike of61 degrees, namely the Aduo fault, was responsible for this event. Further geodetic inversions for finite fault models show that the dip angle of this fault is 75 degrees to the SE. The majority of the slip occurred at the depth from 5km to 17km, and the normal-slip component was comparable to the strike-slip component. The peak slip of31cm occurred at a depth of10km. The InSAR determined moment is 9.61x10(17) Nm with a rigidity of 30 GPa, equivalent to Mw 5.9. The geological map reveals that the Aduo fault was characterized by a left-lateral strike-slip component in the past, as evidenced by the offset of Paleogene sedimentary rocks. Our results for the Zaduo earthquake suggest that the Qiangtang block probably consists of two or more sub-blocks with different eastward extrusion velocities and that the deformation of the Qiangtang block is occurring not only along its boundaries but also in its interior.
机译：十二个Sentinel-1图像用于测量2016年10月17日在中国青海的Zaduo地震引起的表面位移。综合分析局部地质结构，焦点机制，重新定位的余震和来自Insar数据的非线性逆转的故障几何参数，表示具有61度的NE趋势故障，即ADUO故障，负责此事件。用于有限故障模型的其他大地测量终体表明，该故障的倾角为75度到SE。大部分滑移发生在5km至17公里的深度处，并且正常滑移部件与击球式滑动部件相当。 31cm的峰值滑移发生在10km的深度。 Insar确定的时刻是9.61x10（17）nm，刚性为30 gpa，相当于MW 5.9。地质图显示，ADUO故障的特征在于过去的左侧防撞组件，如古代沉积岩的偏移所证明。我们的Zaduo地震结果表明，羌塘块可能包括两个或更多个具有不同东挤压速度的子块，并且羌塘块的变形不仅沿其边界而且在其内部而发生。

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