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DOI | 10.1029/2020GL089556 |
The Robustness of Pressure‐Driven Asthenospheric Flow in Mantle Convection Models With Plate‐Like Behavior | |
Alana Semple; Adrian Lenardic | |
2020-08-25 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | Recent seismic observations challenge the conventional view that tectonic plates are driven by slab‐pull and ridge‐push forces. The observations indicate that the asthenosphere flows faster and in a different direction than the plate above. Previous mantle convection models argued that pressure‐driven flow, in combination with a non‐Newtonian upper mantle, can account for these observations. We expand those models by introducing a formulation that allows for the development of weak plate margins. Weak plate margins lead to an increase in the ratio of slab‐driven to pressure‐driven asthenosphere flow but pressure driven flow remains active and increases with plate margin strength. Locally, the asthenosphere can drive plates and can change flow direction with depth. Furthermore, a non‐Newtonian upper mantle allows for a hysteresis effect where, depending on initial conditions, single‐plate and plate‐tectonic modes can exist at the same parameter conditions. |
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/293039 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Alana Semple,Adrian Lenardic. The Robustness of Pressure‐Driven Asthenospheric Flow in Mantle Convection Models With Plate‐Like Behavior[J]. Geophysical Research Letters,2020. |
APA | Alana Semple,&Adrian Lenardic.(2020).The Robustness of Pressure‐Driven Asthenospheric Flow in Mantle Convection Models With Plate‐Like Behavior.Geophysical Research Letters. |
MLA | Alana Semple,et al."The Robustness of Pressure‐Driven Asthenospheric Flow in Mantle Convection Models With Plate‐Like Behavior".Geophysical Research Letters (2020). |
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