| 关中盆地地壳应力场特征分析 |
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| 引用本文： | 闫俊义,吕睿,赵涛,王莹,白若冰,古云鹤.关中盆地地壳应力场特征分析[J].山西地震,2019(3):39-41. |
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| 作者姓名： | 闫俊义 吕睿 赵涛 王莹 白若冰 古云鹤 |
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| 作者单位： | 陕西省地震局;山西省地震局 |
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| 摘 要： | 通过收集整理关中盆地1972-2018年中小地震的震源机制解,分析其震源破裂类型与空间分布特征,反演得到关中盆地地壳应力场特征为:最大主压应力轴方位261.8°,倾角48.8°;中等主压应力轴方位74.3°,倾角40.9°;最小主压应力轴方位167.4°,倾角3.7°。同时结合活动构造,探讨关中盆地构造变形和强震发生的动力学机制。
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| 关 键 词： | 震源机制 地壳应力场 动力学机制 关中盆地 |
Characteristic Analysis of Crustal Stress Field in Guanzhong Basin |
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| YAN Jun-yi,Lv Rui,ZHAO Tao,WANG Ying,BAI Ruo-bing,GU Yun-he.Characteristic Analysis of Crustal Stress Field in Guanzhong Basin[J].Earthquake Research in Shanxi,2019(3):39-41. |
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| Authors: | YAN Jun-yi Lv Rui ZHAO Tao WANG Ying BAI Ruo-bing GU Yun-he |
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| Institution: | (Shaanxi Earthquake Administration, Xi'an, Shaanxi 710068, China;Earthquake Administration of Shanxi Province, Taiyuan, Shanxi 030021, China) |
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| Abstract: | By collecting and sorting out the focal mechanism solutions of small and medium earthquakes in Guanzhong Basin from 1972 to 2018, the source rupture types and spatial distribution characteristics are analyzed, and the crustal stress field characteristics of Guanzhong Basin are obtained by inversion: The azimuth of the maximum principal compressive stress axis is 261.8 ° and the dip is 48.8 °;the azimuth of the medium principal compressive stress axis is 74.3 ° and the dip is 40.9 °;and the azimuth of the minimum principal compressive stress axis is 167.4 ° and the dip is 3.7 °. At the same time, the dynamic mechanism of tectonic deformation and strong earthquakes in Guanzhong Basin is discussed in combination with active structures. |
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| Keywords: | Focal mechanism Crustal stress field Dynamic mechanism Guanzhong Basin |
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