| 大同盆地现今构造活动及地壳应力场特征 |
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| 引用本文： | 刘巍,孟雁英.大同盆地现今构造活动及地壳应力场特征[J].山西地震,1995(1):7-13. |
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| 作者姓名： | 刘巍 孟雁英 |
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| 作者单位： | 山西省地震局 |
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| 摘 要： | 大量震源机制结果推断出大同分轩现代地壳应力场和主压应力方向为ＮＥ－ＮＥＥ，仰角变化不定，主张应力方向为ＮＷ－ＮＮＷ，仰角很小的结论。这与区域构造应力场ＮＥ－ＮＥＥ向挤压作用的结果相符，另据大同一阳高６．１级、５．８级地震的震源机制结果得出，大同一阳高地震的孕震应力场与华北区域应力场相一致，而不是受本地局部小区域应力场的控制的结论。
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| 关 键 词： | 构造运动 应力场 地壳应力 大同盆地 |
Present Tectogenesis and Characteristics of Crustal Stress Field in Datong Basin |
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| Liu Wei,Meng Yanying,Wang Zhaoli.Present Tectogenesis and Characteristics of Crustal Stress Field in Datong Basin[J].Earthquake Research in Shanxi,1995(1):7-13. |
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| Authors: | Liu Wei Meng Yanying Wang Zhaoli |
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| Institution: | Seismological Bureau of Shanxi Province |
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| Abstract: | Based on numerous focal mechanism solutions,the pa per inferred that the principal compressive stressorientation of the recent crustal stress field in Datong basin is NE-NEE,and its ellvation is uncertain,theprincipal extensional stress orientation is NW-NNW, and its ellvation is verv little.These results are consis-tent with NE-NEE pinching action of the regional tectonic stress field.Based on the focal mechanismn solutionsof the M6.1 and the M5.8 Datong-Yanggao earthquakes,the conclljsion that the seismogenic stress field ofthe Datong-Yanggao earthquake is consistent with the North China regional stress field,the seismogenicstress field is not controled by the local small regiol1al stress field is obtained. |
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| Keywords: | Tectonic movement Stress field Crustal stress Datong basin |
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