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| DOI | 10.1146/annurev-earth-053018-060314 |
| Mechanisms and Implications of Deep Earthquakes | |
| Zhan Z. | |
| 发表日期 | 2020 |
| ISSN | 0084-6597 |
| 起始页码 | 147 |
| 结束页码 | 174 |
| 卷号 | 48 |
| 英文摘要 | Deep earthquakes behave like shallow earthquakes but must have fundamentally different physical processes. Their rupture behaviors, magnitude-frequency statistics, and aftershocks are diverse and imperfectly dependent on various factors, such as slab temperature, depth, and magnitude. The three leading mechanisms for deep earthquakes (i.e., transformational faulting, dehydration embrittlement, and thermal runaway) can each explain portions of the observations but have potentially fundamental difficulties explaining the rest. This situation calls for more serious consideration of hypotheses that involve more than one mechanism. For example, deep earthquakes may initiate by one mechanism, but the ruptures may propagate via another mechanism once triggered. To make further progress, it is critical to evaluate the hypotheses, both single- or dual-mechanism, under conditions as close to those of real slabs as possible to make accurate and specific predictions that are testable using seismic or other geophysical observations. Any new understanding of deep earthquakes promises new constraints on subduction zone structure and dynamics. Deep earthquakes display the complex structure and dynamics of subduction zones in terms of geometry, stress state, rheology, hydration, and phase changes. Phase transformation, dehydration, and thermal runaway are the leading mechanisms for deep earthquakes, but all have major gaps or fundamental difficulties. Deep earthquakes may involve dual-mechanism processes, as hinted at by the diverse rupture and statistic properties and the break of self-similarity. Further progresses would benefit from specific and testable predictions that consider realistic slab conditions with insights from geodynamics, petrology, and mineral physics. © Copyright 2020 by Annual Reviews. All rights reserved. |
| 关键词 | DehydrationGeodynamicsComplex structureDehydration embrittlementsGeophysical observationsSelf-similaritiesShallow earthquakesSlab temperatureStructure and dynamicsThermal runawaysEarthquakesaftershockearthquakeearthquake magnitudeearthquake ruptureseismic surveysubduction zone |
| 语种 | 英语 |
| 来源机构 | Annual Review of Earth and Planetary Sciences |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/131903 |
| 推荐引用方式 GB/T 7714 | Zhan Z.. Mechanisms and Implications of Deep Earthquakes[J]. Annual Review of Earth and Planetary Sciences,2020,48. |
| APA | Zhan Z..(2020).Mechanisms and Implications of Deep Earthquakes.,48. |
| MLA | Zhan Z.."Mechanisms and Implications of Deep Earthquakes".48(2020). |
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