| Numerical simulation of the detachment dynamics in North China Basin |
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| 作者姓名： | 张东宁 曾融生 |
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| 作者单位： | Institute of Geophysics，State Seismological Bureau，Beijing 100081 |
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| 摘 要： | ＮｕｍｅｒｉｃａｌｓｉｍｕｌａｔｉｏｎｏｆｔｈｅｄｅｔａｃｈｍｅｎｔｄｙｎａｍｉｃｓｉｎＮｏｒｔｈＣｈｉｎａＢａｓｉｎＤｏｎｇ－Ｎｉｎｇ；ＺＨＡＮＧ（张东宁）ａｎｄＲｏｎｇ－ＳｈｅｎｇＺＥＮＧ（曾融生）（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，Ｓ...
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| 收稿时间： | 8 August 1994 |
| 修稿时间： | 30 September 1994 |
Numerical simulation of the detachment dynamics in North China Basin |
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| Dong-Ning, ZHANG and Rong-Sheng ZENG.Numerical simulation of the detachment dynamics in North China Basin[J].Acta Seismologica Sinica(English Edition),1995,8(4):511-517. |
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| Authors: | Dong-Ning ZHANG and Rong-Sheng ZENG |
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| Institution: | (1) Institute of Geophysics, State Seismological Bureau, 100081 Beijing |
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| Abstract: | Refering to geological evidences and recent Lincheng-Julu deep seismic reflection profile in the west-central part of North
China Basin, it is concluded preliminarily that a low angle detachment structure may exist in the central part of North China
depression. Numerical method is used to simulate the influence of hot mantle intrusive bodies to Cenozoic basin tectonic movements.
Numerical simulations show that, (1) The intrusion of hot mantle material has led to an extensional stress state in the upper
crust in central North China depression. As time increasing, the extensional stress state changed slightly in the upper crust
and was in keeping with the normal faulting tectonics in the upper crust in depression area. (2) In Cenozoic era, under the
effects of magmatic intrusion and the resistance of Taihang Mountain, the weak zone produced by the Mesozoic thrust faulting
would become a detachment structure. (3) With the elapse of time, the horizontal compressive stress gradually concentrated
in the median crust, and the concentration of stress may generate strike-slip earthquakes in the median crust above the intrusive
body.
Contribution No. 95A0113, Institute of Geophysics, SSB, China. |
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| Keywords: | North China Basin depression detachment structure crustal structure finite element modelling |
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