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DOI | 10.1038/s41561-018-0126-4 |
Anomalous mantle transition zone beneath the Yellowstone hotspot track | |
Zhou, Ying | |
2018-06-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:6页码:449-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The origin of the Yellowstone and Snake River Plain volcanism has been strongly debated. The mantle plume model successfully explains the age-progressive volcanic track, but a deep plume structure has been absent in seismic imaging. Here I apply diffractional tomography to receiver functions recorded at USArray stations to map high-resolution topography of mantle transition-zone discontinuities. The images reveal a trail of anomalies that closely follow the surface hotspot track and correlate well with a seismic wave-speed gap in the subducting Farallon slab. This observation contradicts the plume model, which requires anomalies in the mid mantle to be confined in a narrow region directly beneath the present-day Yellowstone caldera. I propose an alternative interpretation of the Yellowstone volcanism. About 16 million years ago, a section of young slab that had broken off from a subducted spreading centre in the mantle first penetrated the 660 km discontinuity beneath Oregon and Idaho, and pulled down older stagnant slab. Slab tearing occurred along pre-existing fracture zones and propagated northeastward. This reversed-polarity subduction generated passive upwellings from the lower mantle, which ascended through a water-rich mantle transition zone to produce melting and age-progressive volcanism. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000433901600020 |
WOS关键词 | NORTH-AMERICA ; FARALLON PLATE ; SUBDUCTION ; DISCONTINUITIES ; TOMOGRAPHY ; RESOLUTION ; FRAGMENTS ; VOLCANISM ; VELOCITY ; ORIGIN |
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/35085 |
专题 | 地球科学 气候变化 |
作者单位 | Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA |
推荐引用方式 GB/T 7714 | Zhou, Ying. Anomalous mantle transition zone beneath the Yellowstone hotspot track[J]. NATURE GEOSCIENCE,2018,11(6):449-+. |
APA | Zhou, Ying.(2018).Anomalous mantle transition zone beneath the Yellowstone hotspot track.NATURE GEOSCIENCE,11(6),449-+. |
MLA | Zhou, Ying."Anomalous mantle transition zone beneath the Yellowstone hotspot track".NATURE GEOSCIENCE 11.6(2018):449-+. |
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