globalchange  > 气候变化事实与影响
Scopus记录号: 2-s2.0-85056664704
论文题名:
Widespread volcanism in the Greenland–North Atlantic region explained by the Iceland plume
作者: Steinberger B.; Bredow E.; Lebedev S.; Schaeffer A.; Torsvik T.H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2019
卷: 12, 期:1
起始页码: 61
结束页码: 68
语种: 英语
Scopus关键词: geodynamics ; hot spot ; lithosphere ; mantle plume ; plume ; rifting ; seafloor ; seafloor spreading ; submarine ridge ; volcanism ; Arctic ; Atlantic Ocean ; Atlantic Ocean (North) ; Greenland ; Iceland
英文摘要: In the classical concept, a hotspot track is a line of volcanics formed as a plate moves over a stationary mantle plume. Defying this concept, intraplate volcanism in Greenland and the North Atlantic region occurred simultaneously over a wide area, particularly around 60 million years ago, showing no resemblance to a hotspot track. Here, we show that most of this volcanism can nonetheless be explained solely by the Iceland plume interacting with seafloor spreading ridges, global mantle flow and a lithosphere (the outermost rigid layer of the Earth) with strongly variable thickness. An east–west corridor of thinned lithosphere across central Greenland, as inferred from new, highly resolved tomographic images, could have formed as Greenland moved westward over the Iceland plume between 90 and 60 million years ago. Our numerical geodynamic model demonstrates how plume material may have accumulated in this corridor and in areas east and west of Greenland. Simultaneous plume-related volcanic activities starting about 62 million years ago on either side of Greenland could occur where and when the lithosphere was thin enough due to continental rifting and seafloor spreading, possibly long after the plume reached the base of the lithosphere. © 2018, The Author(s), under exclusive licence to Springer Nature Limited.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122647
Appears in Collections:气候变化事实与影响

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作者单位: Section 2.5 Geodynamic Modelling, GFZ German Research Centre for Geosciences, Potsdam, Germany; Centre for Earth Evolution and Dynamics (CEED), University of Oslo, Oslo, Norway; Dublin Institute for Advanced Studies, School of Cosmic Physics, Geophysics Section, Dublin, Ireland; Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada; Department of Earth Sciences, University of Ottawa, Ottawa, Canada; Geological Survey of Norway (NGU), Trondheim, Norway; School of Geosciences, University of the Witwatersrand, Wits, South Africa; Institute of Geosciences, Christian-Albrechts-Universität zu Kiel, Kiel, Germany

Recommended Citation:
Steinberger B.,Bredow E.,Lebedev S.,et al. Widespread volcanism in the Greenland–North Atlantic region explained by the Iceland plume[J]. Nature Geoscience,2019-01-01,12(1)
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