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Effects of the Iceland plume on Greenland's lithosphere: New insights from ambient noise tomography
https://nipr.repo.nii.ac.jp/records/15105
https://nipr.repo.nii.ac.jp/records/15105b9d02d36-949f-4b6a-85fd-899af8f08f97
Item type | 学術雑誌論文 / Journal Article(1) | |||||||||
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公開日 | 2018-09-04 | |||||||||
タイトル | ||||||||||
タイトル | Effects of the Iceland plume on Greenland's lithosphere: New insights from ambient noise tomography | |||||||||
タイトル | ||||||||||
言語 | en | |||||||||
タイトル | Effects of the Iceland plume on Greenland's lithosphere: New insights from ambient noise tomography | |||||||||
言語 | ||||||||||
言語 | eng | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | Greenland's lithosphere | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | Iceland plume track | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | Lithospheric thinning and weakening | |||||||||
資源タイプ | ||||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
資源タイプ | journal article | |||||||||
アクセス権 | ||||||||||
アクセス権 | metadata only access | |||||||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||
著者 |
Antonijevic, Sanja Knezevic
× Antonijevic, Sanja Knezevic
× Lees, Jonathan M.
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抄録 | ||||||||||
内容記述タイプ | Abstract | |||||||||
内容記述 | Ambient noise tomography is used to image Greenland's lithosphere, which passed over the Iceland plume between ∼70 and ∼40 Ma. Cross-correlations from 21 stations from GLISN seismic network were used to invert for 2-D Rayleigh wave phase velocity maps for 14 periods between 8 and 40 s. We find that Rayleigh wave phase velocities substantially vary across Greenland, with slow velocities coinciding with NW-SE trending Iceland plume track. In east Greenland the detected velocity reduction at longer periods (33–40s) reflects substantially thinned lithosphere, thermally ablated by the plume. From the east, the reduced velocities shift NW at shorter periods (12–20s), indicating shallowing of the plume-related slow anomaly. In north-central Greenland, the reduced velocities appear in the proximity of the plume ∼60 Ma, reflecting lithospheric weakening in the presence of residual heat that still persists within the lithosphere. Our results provide important new constraints on variations in the seismic velocity structure of Greenland's crust and uppermost mantle, revealing prolonged effects of the mantle plume on the overpassing craton. | |||||||||
書誌情報 |
en : Polar Science 巻 17, p. 75-82, 発行日 2018-09 |
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ISSN | ||||||||||
収録物識別子タイプ | ISSN | |||||||||
収録物識別子 | 18739652 | |||||||||
DOI | ||||||||||
識別子タイプ | DOI | |||||||||
関連識別子 | https://doi.org/10.1016/j.polar.2018.06.004 | |||||||||
関連名称 | 10.1016/j.polar.2018.06.004 |