DOI: 10.1016/j.epsl.2021.117048
论文题名: The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism
作者: Celli N.L. ; Lebedev S. ; Schaeffer A.J. ; Gaina C.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 569 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165426
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Earth and Planetary Science Letters,2021-01-01,569