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DOI | 10.1029/2019GL086508 |
Plume-Tree Structure Induced by Low-Viscosity Layers in the Upper Mantle | |
Liu, Hao1,2; Leng, Wei1,2 | |
2020-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Previous seismological results and geodynamic modeling showed that mantle plumes have thin tails. However, the latest geophysical observations reveal the presence of broad and bifurcate plumes in the lower and upper mantle, providing a new challenge to further understand the evolution of plume morphology. Here, developing 3-D numerical models, we demonstrate that a plume shaped like a tree, derived from the mantle transition zone, branches up to surface volcanoes due to the combined influence of weak layers in the asthenosphere and the mantle transition zone. Clusters of mantle plumes likely explain the simultaneous occurrence of multiple subparallel hot spot tracks in the Pacific and Atlantic Oceans. Meanwhile, the mantle plume wandering at a rate of similar to 1.5 cm/year in the upper mantle without a strong mantle wind provides a new mechanism for hot spot motions. Thus, our model represents a significant advance for linking plume studies in seismology, geochemistry, and plate reconstruction. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000513983400030 |
WOS关键词 | PHASE-TRANSITIONS ; HOTSPOT ; BENEATH ; MOTION ; CONVECTION ; ATLANTIC ; PACIFIC ; MODEL ; INVERSION ; VOLCANISM |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/279505 |
专题 | 气候变化 |
作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, Lab Seismol & Phys Earths Interior, Hefei, Peoples R China; 2.CAS Ctr Excellence Comparat Planetol, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Hao,Leng, Wei. Plume-Tree Structure Induced by Low-Viscosity Layers in the Upper Mantle[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(1). |
APA | Liu, Hao,&Leng, Wei.(2020).Plume-Tree Structure Induced by Low-Viscosity Layers in the Upper Mantle.GEOPHYSICAL RESEARCH LETTERS,47(1). |
MLA | Liu, Hao,et al."Plume-Tree Structure Induced by Low-Viscosity Layers in the Upper Mantle".GEOPHYSICAL RESEARCH LETTERS 47.1(2020). |
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