气候变化领域集成服务门户(CCPortal): The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism

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DOI	10.1016/j.epsl.2021.117048
	The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism
	Celli N.L.; Lebedev S.; Schaeffer A.J.; Gaina C.
发表日期	2021
ISSN	0012821X
卷号	569
英文摘要	Iceland and the encompassing Northeast Atlantic are characterized by abundant volcanism, anomalously high topography and, in many places, anomalously thick basaltic crust. This has been attributed to the Iceland Plume, rising from the deep mantle, though its structure and very existence are debated. Using seismic waveform tomography with massive datasets, we compute a new, detailed model of the crust and upper mantle beneath Iceland and the surrounding North Atlantic region. The model reveals a large, low-velocity anomaly, indicative of high temperatures, at 400-660 kilometers depth beneath eastern Greenland, where seismic receiver functions also indicate an extensive high-temperature region. The anomaly rises upwards and eastwards toward Iceland, deflecting around the thick lithosphere of Greenland's cratons, which we also image in detail. We interpret the major low-velocity anomaly as the Iceland Plume, ascending from under Greenland and captured by the Mid-Atlantic Ridge. The ascent of the plume beneath the western Northeast Atlantic is consistent with its thin lithosphere, documented by our tomography, and abundant seamounts. Our results reconcile previously contrasting views on the structure of the Iceland Plume: while the plume is clearly visible in the transition zone beneath Greenland, it is confined to the upper mantle beneath Iceland. © 2021 Elsevier B.V.
关键词	Iceland mantle plumes plume-lithosphere interaction waveform tomography
英文关键词	Seismographs; Structural geology; Tomography; Topography; Green land; Iceland plume; Icelands; Low-velocity anomaly; Mantle plume; North Atlantic; North East Atlantic; Plume-lithosphere interactions; Upper mantle; Waveform tomography; Seismology; crustal structure; heat flow; lithospheric structure; magmatism; mantle plume; mantle structure; seismic tomography; upper mantle; waveform analysis; Arctic; Atlantic Ocean; Atlantic Ocean (Northeast); Greenland; Iceland
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203048
作者单位	Dublin Institute for Advanced Studies, Dublin, Ireland; Geological Survey of Canada, Pacific Division, Sidney Subdivision, Canada; Centre for Earth Evolution and Dynamics (CEED), University of Oslo, Oslo, Norway; School of Earth and Atmospheric Sciences, Queensland University of Technology, Australia
推荐引用方式 GB/T 7714	Celli N.L.,Lebedev S.,Schaeffer A.J.,et al. The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism[J],2021,569.
APA	Celli N.L.,Lebedev S.,Schaeffer A.J.,&Gaina C..(2021).The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism.Earth and Planetary Science Letters,569.
MLA	Celli N.L.,et al."The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism".Earth and Planetary Science Letters 569(2021).