Seismic evidence for a tilted mantle plume and north–south mantle flow beneath Iceland

Yang Shen, Sean C. Solomon, Ingi Þorleifur Bjarnason, Guust Nolet, W.Jason Morgan, Richard M. Allen, Kristín Vogfjörð, Steinunn Jakobsdóttir, Ragnar Stefánsson, B.R. Julian, G.R. Foulger

Research output: Contribution to journalArticlepeer-review

74 Citations (Scopus)

Abstract

Shear waves converted from compressional waves at mantle discontinuities near 410- and 660-km depth recorded by two broadband seismic experiments in Iceland reveal that the center of an area of anomalously thin mantle transition zone lies at least 100 km south of the upper-mantle low-velocity anomaly imaged tomographically beneath the hotspot. This offset is evidence for a tilted plume conduit in the upper mantle, the result of either northward flow of the Icelandic asthenosphere or southward flow of the upper part of the lower mantle in a no-net-rotation reference frame.
Original languageEnglish
Pages (from-to)261-272
JournalEarth and Planetary Science Letters
Volume197
Issue number3-4
DOIs
Publication statusPublished - Apr 2002

Other keywords

  • Mantle plume
  • Transition zones
  • Discontinuities
  • Convection
  • Iceland
  • Jarðmöttull
  • Jarðskorpa
  • Jarðskjálftavirkni
  • Ísland

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