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DOI | 10.1029/2021GL093862 |
Spatial dependence of dynamic nonlinear rock weakening at the Alpine Fault, New Zealand | |
Jonathan Simpson; Kasper van Wijk; Ludmila Adam | |
2021-07-03 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | We perform laser ultrasonic measurements to investigate the spatial dependence of dynamic nonlinear weakening in rocks from the Alpine Fault, New Zealand. Rocks outside the damage zone display no nonlinear weakening. Within the damage zone ( < 30 m from the fault), cataclasites present a 3% reduction in shear modulus from wave amplitudes inducing 1-2 microstrain at atmospheric pressure. This nonlinear elasticity decreases with a characteristic pressure between 1-2.5 MPa. We show that rock weakening is therefore strongest in the near surface. However, this significant elastic nonlinearity in cataclasites at low strains confirms that rock weakening may play an important role in earthquake processes, such as fault weakening, triggering of slip, rupture propagation, and coseismic velocity decreases. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/333762 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Jonathan Simpson,Kasper van Wijk,Ludmila Adam. Spatial dependence of dynamic nonlinear rock weakening at the Alpine Fault, New Zealand[J]. Geophysical Research Letters,2021. |
APA | Jonathan Simpson,Kasper van Wijk,&Ludmila Adam.(2021).Spatial dependence of dynamic nonlinear rock weakening at the Alpine Fault, New Zealand.Geophysical Research Letters. |
MLA | Jonathan Simpson,et al."Spatial dependence of dynamic nonlinear rock weakening at the Alpine Fault, New Zealand".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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