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Origin of a ‘Southern Hemisphere’ geochemical signature in the Arctic upper mantle

Author

Listed:
  • Steven L. Goldstein

    (Lamont-Doherty Earth Observatory of Columbia University,
    Columbia University, 61 Route 9W, Palisades, New York 10964, USA)

  • Gad Soffer

    (Lamont-Doherty Earth Observatory of Columbia University,
    Columbia University, 61 Route 9W, Palisades, New York 10964, USA
    Present address: Harvard Business School, Soldiers Field, Boston, Massachusetts 02163, USA.)

  • Charles H. Langmuir

    (Harvard University, 20 Oxford Street, Cambridge, Massachusetts 02138, USA)

  • Kerstin A. Lehnert

    (Lamont-Doherty Earth Observatory of Columbia University,)

  • David W. Graham

    (College of Ocean and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA)

  • Peter J. Michael

    (University of Tulsa, 600 South College Avenue Tulsa, Oklahoma 74104, USA)

Abstract

An abrupt mantle compositional boundary exists on the the Gakkel ridge, with basalts from west of the boundary displaying affinities to the 'Dupal' isotopic province, previously observed only in the Southern Hemisphere. It is concluded that the source of the Dupal signature is subcontinental lithospheric mantle that delaminated and became integrated into the convecting Arctic asthenosphere.

Suggested Citation

  • Steven L. Goldstein & Gad Soffer & Charles H. Langmuir & Kerstin A. Lehnert & David W. Graham & Peter J. Michael, 2008. "Origin of a ‘Southern Hemisphere’ geochemical signature in the Arctic upper mantle," Nature, Nature, vol. 453(7191), pages 89-93, May.
    • Handle: RePEc:nat:nature:v:453:y:2008:i:7191:d:10.1038_nature06919
    DOI: 10.1038/nature06919
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    Cited by:

    1. Guido M. Gianni & Jeremías Likerman & César R. Navarrete & Conrado R. Gianni & Sergio Zlotnik, 2023. "Ghost-arc geochemical anomaly at a spreading ridge caused by supersized flat subduction," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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