Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091074 |
Lithospheric formation and evolution of eastern North American continent | |
Haiying Gao; Cong Li | |
2021-02-16 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Lithospheric layering contains critical information about continental formation and evolution. However, discrepancies on the depth distributions of lithospheric layers have significantly limited our understanding of possible tectonic connections among the layers. Here we construct a high‐resolution shear velocity model of eastern North America using full‐wave ambient noise simulation and inversion by integrating onshore and offshore seismic datasets. Our new model reveals large lateral variations of lithosphere thickness approximately across the major tectonic boundaries, strong low‐velocity anomalies underlying the thinner lithosphere, and multiple low‐velocity layers within the continental lithosphere. We suggest that the present mantle lithosphere beneath eastern North America was formed and modified through multiple stages of tectonic processes, among which metasomatism may have significantly contributed to the observed intralithospheric low‐velocity layers. The sharp thickness variation of lithosphere promoted edge‐driven mantle convection, which has been consequently modifying the overlying mantle lithosphere and further sharpening the gradient of lithosphere thickness |
领域 | 气候变化 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/315696 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Haiying Gao,Cong Li. Lithospheric formation and evolution of eastern North American continent[J]. Geophysical Research Letters,2021. |
APA | Haiying Gao,&Cong Li.(2021).Lithospheric formation and evolution of eastern North American continent.Geophysical Research Letters. |
MLA | Haiying Gao,et al."Lithospheric formation and evolution of eastern North American continent".Geophysical Research Letters (2021). |
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