| 云南省通海-石屏地区地震构造 |
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| 引用本文： | 朱成男.云南省通海-石屏地区地震构造[J].西北地震学报,1982,4(1):107-114. |
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| 作者姓名： | 朱成男 |
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| 作者单位： | 云南省地震局 |
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| 摘 要： | 本文采用地貌分析法确定了云南省通海—石屏地区第四纪中的地表垂直构造形变。应用这个形变资料,根据弹性位错理论求得区内几条活动断层的错距,其中曲江断裂的右旋水平错距为5公里。指出本区在第四纪中主要受北北西—南东东方向的压应力作用。根据地震裂缝、三边测量、定点基线测量和震源机制资料,求得本区现代构造应力场。作者发现它与第四纪构造应力场是相似的。由曲江断裂的平均5—7毫米/年的水平运动速度去估计,通海7.7级地震平均复发周期为300—400年。作者还指出通海地震前400年内,地震活动形成空区。并利用围空地震资料,求得空区内地震震级M与围空地震的断层总面积S之间存在经验关系, M=1gs-3.8
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| 收稿时间： | 1980/8/29 0:00:00 |
SEISMOTECTONICS IN TONGHAI-SHIPING AREA,YUNNAN PROVINCE,CHINA |
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| Zhu Cheng-nan.SEISMOTECTONICS IN TONGHAI-SHIPING AREA,YUNNAN PROVINCE,CHINA[J].Northwestern Seismological Journal,1982,4(1):107-114. |
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| Authors: | Zhu Cheng-nan |
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| Institution: | The Seismological Bureau of Yunnan Province |
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| Abstract: | The Tonghai-Shiping area is located in South Yunnan province.Many large historical earthquakes occurred in the area.It is important to study seismotectonics here.In this paper,the method of geomorphological analyses,the sur-face vertical tectonic deformation since pleistocene in the area is obtaine,and right iateral displacement 5KM and average movement velocity 5mm/yr are calculated from the vertical deformation by elastic dislocation the-ory.The results show that present and quaternary tectonic stress fields are same,their principle compression axes are NNW-SSE direction.The average interval of earthquakes as large as magnitude 7 along the Qujiang fault is about 400 years.The data of earthquakes in this area show that there had been a gap of the large earthquake along the fault during 400 years before the large Tonghai earthquake. |
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