海原断裂带库仑应力积累

崔笃信; 胡亚轩; 王文萍; 朱桂芝

Volume 34 Issue 4

Jul. 2009

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CUI Du-xin, HU Ya-xuan, WANG Wen-ping, ZHU Gui-zhi, 2009. Coulomb Stress Accumulation along Haiyuan Fault Zone. Earth Science, 34(4): 641-650.

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CUI Du-xin, HU Ya-xuan, WANG Wen-ping, ZHU Gui-zhi, 2009. Coulomb Stress Accumulation along Haiyuan Fault Zone. Earth Science, 34(4): 641-650.

CUI Du-xin, HU Ya-xuan, WANG Wen-ping, ZHU Gui-zhi, 2009. Coulomb Stress Accumulation along Haiyuan Fault Zone. Earth Science, 34(4): 641-650.

Citation:

CUI Du-xin, HU Ya-xuan, WANG Wen-ping, ZHU Gui-zhi, 2009. Coulomb Stress Accumulation along Haiyuan Fault Zone. Earth Science, 34(4): 641-650.

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Coulomb Stress Accumulation along Haiyuan Fault Zone

No.2 Monitoring Center o f China Earth quake Adm inistration, X i an 710054, Ch ina

Received Date: 2008-10-28
Publish Date: 2009-07-25

Abstract

Abstract

We caculate Coulomb stress accumulation rate and moment accumulation rate through inversing Haiyuan fault slipping rates and locking depths by using a Fourier solution of 3D body force model with constrains of CMONOC and GPS profiles data.Genetic algorithm has been applied to simulate the GPS velocity field.The last fitting rms residual is 1.2 mm/a.The result reveals that the slip rate of left lateral of Maomao Shan fault is 3.6 mm/a, and 22.2 km for the locking depth.For Laohushan, its slip rate is 10.5 mm/a and 11.4 km for locking depth.The slip rate in western segment, middle segment and eastern segment of Haiyuan fault (in narrow sense) is respectively 3.5 mm/a, 5.8 mm/a and 5.7 mm/a, and 8.5 km, 3.6 km and 4.3 km for the locking depth.The Coulomb stress accumulation rates are 0.48~1.59 MPa/100 a along Haiyuan fault zone.The Coulomb stress accumulation rate is large but the moment accumulation rate is small in Maomaoshan fault.In Laohushan fault both the Coulomb stress accumulation rate and moment accumulation rate are large.The Coulomb stress accumulation rates in the middle and western segments of Haiyuan fault (in narrow sense) are largest in all segments.
- Haiyuan fault zone,
- 3D body force model,
- slip rate,
- locking depth,
- Coulomb stress accumulation rate,
- moment accumulation rate,
- seismology.

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References(62)

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