| Possible dynamics of normal－fault earthquakes in the upper crust of the south part of the Qinghai－Xizang Plateau |
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| 引用本文： | 张东宁,许忠淮.Possible dynamics of normal－fault earthquakes in the upper crust of the south part of the Qinghai－Xizang Plateau[J].地震学报(英文版),1995,8(2):233-239. |
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| 作者姓名： | 张东宁 许忠淮 |
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| 作者单位： | Institute of Geophysics，State Seismological Bureau，Beijing 100081，China |
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| 摘 要： | Ｐｏｓｓｉｂｌｅｄｙｎａｍｉｃｓｏｆｎｏｒｍａｌ－ｆａｕｌｔｅａｒｔｈｑｕａｋｅｓｉｎｔｈｅｕｐｐｅｒｃｒｕｓｔｏｆｔｈｅｓｏｕｔｈｐａｒｔｏｆｔｈｅＱｉｎｇｈａｉ－ＸｉｚａｎｇＰｌａｔｅａｕ张东宁，许忠淮Ｄｏｎｇ－ＮｉｎｇＺＨＡＮＧａｎｄＺｈｏｎｇ...
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| 收稿时间： | 5 February 1994 |
| 修稿时间： | 21 July 1994 |
Possible dynamics of normal-fault earthquakes in the upper crust of the south part of the Qinghai-Xizang Plateau |
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| Dong-Ning ZHANG and Zhong-Huai XU.Possible dynamics of normal-fault earthquakes in the upper crust of the south part of the Qinghai-Xizang Plateau[J].Acta Seismologica Sinica(English Edition),1995,8(2):233-239. |
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| Authors: | Dong-Ning ZHANG and Zhong-Huai XU |
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| Institution: | (1) Institute of Geophysics, State Seismological Bureau, 100081 Beijing, China |
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| Abstract: | A numerical model for generating normal fault earthquakes in the Qinghai-Xizang Plateau’s upper crust is constructed with
3-D elasto-viscous finite element method. Based on the numerical simulation calculation, some conclusions were got: If the
effective viscosity of the upper crust material is less than that of lower strata of the crust in the Qinghai-Xizang Plateau,
even under the strong push of India continent, the stress state of the upper crust can still be extensional in south part
of the Qinghai-Xizang Plateau. Numerical simulations show that the stress state changes with the depth of the lithosphere,
from extensional stress state in upper crust to compressive in the lower part. Extensional stress state may exist mainly in
the upper crust of the south part of the Qinghai-Xizang Plateau.
Contribution No. 94A0107, Institute of Geophysics, SSB, China.
This subject is sponsored by the youth natural science found from the Chinese Natural Science Foundation. |
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| Keywords: | Qinghai-Xizang subplate normal fault seismic activity finite element effective viscosity |
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