Opin vísindi

Seismic evidence for a lower-mantle origin of the Iceland plume

Show simple item record

dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Shen, Yang
dc.contributor.author Solomon, Sean C.
dc.contributor.author Bjarnason, Ingi Þorleifur
dc.contributor.author Wolfe, Cecily J.
dc.date.accessioned 2018-02-23T15:03:21Z
dc.date.available 2018-02-23T15:03:21Z
dc.date.issued 1998-09
dc.identifier.citation Shen, Y., Solomon, S. C., Bjarnason, I. T., & Wolfe, C. J. (1998). Seismic evidence for a lower-mantle origin of the Iceland plume. Nature, 395, 62. doi:10.1038/25714
dc.identifier.issn 0028-0836
dc.identifier.issn 1476-4687 (eISSN)
dc.identifier.uri https://hdl.handle.net/20.500.11815/574
dc.description.abstract Iceland, one of the most thoroughly investigated hotspots1,2,3, is generally accepted to be the manifestation of an upwelling mantle plume4. Yet whether the plume originates from the lower mantle or from a convective instability at a thermal boundary layer between the upper and lower mantle near 660 km depth5,6 remains unconstrained. Tomographic inversions of body-wave delay times show that low seismic velocities extend to at least 400 km depth beneath central Iceland7,8, but cannot resolve structure at greater depth. Here we report lateral variations in the depths of compressional-to-shear wave conversions at the two seismic discontinuities marking the top and bottom of the mantle transition zone beneath Iceland. We find that the transition zone is 20 km thinner than in the average Earth9 beneath central and southern Iceland, but is of normal thickness beneath surrounding areas, a result indicative of a hot and narrow plume originating from the lower mantle.
dc.description.sponsorship This work was supported by the US NSF
dc.format.extent 62-65
dc.language.iso en
dc.publisher Springer Nature
dc.relation.ispartofseries Nature;395(6697)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Jarðeðlisfræði
dc.subject Jarðmöttull
dc.subject Jarðskjálftar
dc.subject Jarðskjálftamælingar
dc.subject Ísland
dc.title Seismic evidence for a lower-mantle origin of the Iceland plume
dc.type info:eu-repo/semantics/article
dc.description.version Peer Reviewed
dc.identifier.journal Nature
dc.identifier.doi 10.1038/25714
dc.contributor.department Raunvísindastofnun (HÍ)
dc.contributor.department Science Institute (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

Files in this item

This item appears in the following Collection(s)

Show simple item record