| A 3-d viscoelastoplastic model for simulating long-term slip on non-planar faults | |
| Li, Qingsong1,2; Liu, Mian1; Zhang, Huai1,3 | |
| 刊名 | Geophysical journal international
 |
| 2009 | |
| 卷号 | 176期号:1页码:293-306 |
| 关键词 | Crustal deformation Fault slip Finite-element methods Restraining bends Strain localization Transform faults |
| ISSN号 | 0956-540X |
| DOI | 10.1111/j.1365-246x.2008.03962.x |
| 通讯作者 | Li, qingsong(li@lpi.usra.edu) |
| 英文摘要 | The geometrical complexity of non-planar faults is known to affect not only fault slip rates but also crustal deformation and seismicity in the surrounding region, but implementing non-planar faults in numerical models has been challenging. we have developed a 3-d viscoelastoplastic finite element model to simulate long-term, steady-state fault slip along conceptual restraining bends and crustal deformation around them. by incorporating plastic yielding in both fault zones and the surrounding crust, this model can predict the quasi-steady state stress field and strain partitioning while avoiding pathological stress build-up encountered in traditional viscoelastic models. here we detail the formulation of this model and explore major model parameters. the model results show that restraining bends tend to impede fault slip, increase shear stress in the surrounding crust and localize strain in a pair of belts off the fault zone. these effects are enhanced by high viscosity in the lower crust and upper mantle, high aspect ratio of bend width over fault length, fast relative motion of fault blocks and high fault friction. these model results may help explain the diffuse deformation surrounding the big bend of the san andreas fault and the more confined deformation around the lebanon bend of the dead sea fault. |
| WOS关键词 | SAN-ANDREAS FAULT ; WESTERN UNITED-STATES ; FINITE-ELEMENT-ANALYSIS ; MADRID SEISMIC ZONE ; SOUTHERN CALIFORNIA ; PLATE BOUNDARIES ; POSTSEISMIC DEFORMATION ; NUMERICAL EXPERIMENTS ; MECHANICAL MODEL ; CRUSTAL RHEOLOGY |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000261883400023 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2398875 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, Qingsong |
| 作者单位 | 1.Univ Missouri, Dept Geol Sci, Columbia, MO 65211 USA 2.Lunar & Planetary Inst, Houston, TX 77058 USA 3.Chinese Acad Sci, Grad Univ, Computat Geodynam Lab, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Qingsong,Liu, Mian,Zhang, Huai. A 3-d viscoelastoplastic model for simulating long-term slip on non-planar faults[J]. Geophysical journal international,2009,176(1):293-306. |
| APA | Li, Qingsong,Liu, Mian,&Zhang, Huai.(2009).A 3-d viscoelastoplastic model for simulating long-term slip on non-planar faults.Geophysical journal international,176(1),293-306. |
| MLA | Li, Qingsong,et al."A 3-d viscoelastoplastic model for simulating long-term slip on non-planar faults".Geophysical journal international 176.1(2009):293-306. |
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