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DOI | 10.1029/2021GL092889 |
The Crustal Stress Field Inferred from Focal Mechanisms in Northern Chile | |
Carlos Herrera; John F. Cassidy; Stan E. Dosso; Jan Dettmer; Wasja Bloch; Christian Sippl; Pablo Salazar | |
2021-04-18 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | We study the spatial variability of the crustal stress in northern Chile. A margin‐parallel compressive crustal stress regime is inferred along the coastal region between 19°S and 23.5°S, similar to stress observations in Cascadia and Japan. The Andean Precordillera shows a distinct stress field associated with a strike‐slip faulting regime around 21°S. These results are constrained by over a decade of observations, for which earthquake catalogs report thousands of events in the continental crust. We present focal mechanisms for 817 of these crustal earthquakes, including mechanism qualities. The best mechanisms were grouped and inverted to infer the stress‐field variability. We interpret the margin‐parallel compression to be caused by the concave shape of the margin and the locking of the plate interface. The inferred strike‐slip regime in the Andes agrees with previous studies and has been proposed to be mostly caused by local stresses imposed by a thicker crust. |
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/322837 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Carlos Herrera,John F. Cassidy,Stan E. Dosso,et al. The Crustal Stress Field Inferred from Focal Mechanisms in Northern Chile[J]. Geophysical Research Letters,2021. |
APA | Carlos Herrera.,John F. Cassidy.,Stan E. Dosso.,Jan Dettmer.,Wasja Bloch.,...&Pablo Salazar.(2021).The Crustal Stress Field Inferred from Focal Mechanisms in Northern Chile.Geophysical Research Letters. |
MLA | Carlos Herrera,et al."The Crustal Stress Field Inferred from Focal Mechanisms in Northern Chile".Geophysical Research Letters (2021). |
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