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DOI | 10.1038/s41561-017-0035-y |
Western US volcanism due to intruding oceanic mantle driven by ancient Farallon slabs | |
Zhou, Quan; Liu, Lijun; Hu, Jiashun | |
2018 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:1页码:70-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The origin of late Cenozoic intraplate volcanism over the western United States is debated. One important reason is the lack of a clear understanding of the mantle dynamics during this volcanic history. Here we reconstruct the mantle thermal states beneath North America since 20 million years ago using a hybrid inverse geodynamic model with data assimilation. The model simultaneously satisfies the past subduction kinematics, present mantle tomographic image and the volcanic history. We find that volcanism in both the Yellowstone volcanic province and the Basin and Range province corresponds to a similar eastward-intruding mantle derived from beneath the Pacific Ocean and driven mostly by the sinking Farallon slab below the central-eastern United States. The hot mantle that forms the Columbia River flood basalt and subsequent Yellowstone-Newberry hotspot tracks first enters the western United States through tears within the Juan de Fuca slab. Subsequent coexistence of the westward asthenospheric flow above the retreating Juan de Fuca slab and eastward-propagating mantle beyond the back-arc region reproduces the bifurcating hotspot chains. A similar but weaker heat source intrudes below the Basin and Range around the southern edge of the slab, and can explain the diffuse basaltic volcanism in this region. According to our models, the putative Yellowstone plume contributes little to the formation of the Yellowstone volcanic province. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423842000022 |
WOS关键词 | COLORADO PLATEAU ; WAVE TOMOGRAPHY ; NORTH-AMERICA ; BENEATH ; ORIGIN ; BASIN ; PLUME ; BASALTS ; UPLIFT ; RANGE |
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/34828 |
专题 | 地球科学 气候变化 |
作者单位 | Univ Illinois, Dept Geol, Champaign, IL 61820 USA |
推荐引用方式 GB/T 7714 | Zhou, Quan,Liu, Lijun,Hu, Jiashun. Western US volcanism due to intruding oceanic mantle driven by ancient Farallon slabs[J]. NATURE GEOSCIENCE,2018,11(1):70-+. |
APA | Zhou, Quan,Liu, Lijun,&Hu, Jiashun.(2018).Western US volcanism due to intruding oceanic mantle driven by ancient Farallon slabs.NATURE GEOSCIENCE,11(1),70-+. |
MLA | Zhou, Quan,et al."Western US volcanism due to intruding oceanic mantle driven by ancient Farallon slabs".NATURE GEOSCIENCE 11.1(2018):70-+. |
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