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The return of subducted continental crust in Samoan lavas

Author

Listed:
  • Matthew G. Jackson

    (Massachusetts Institute of Technology, Woods Hole Oceanographic Institution Joint Program)

  • Stanley R. Hart

    (Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543-1525, USA)

  • Anthony A. P. Koppers

    (Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0225, USA
    College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331-5503, USA)

  • Hubert Staudigel

    (Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0225, USA)

  • Jasper Konter

    (Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0225, USA)

  • Jerzy Blusztajn

    (Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543-1525, USA)

  • Mark Kurz

    (Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543-1525, USA)

  • Jamie A. Russell

    (Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0225, USA)

Abstract

Earth to ocean Plate tectonics injects chemically enriched oceanic crust and sediments into the mantle at subduction zones. Vigorous mantle mixing dilutes and destroys the chemical signature of these materials, so that if they return to the surface in mantle plumes, they are hard to recognize. The discovery of remarkably enriched 87Sr/86Sr and 143Nd/144Nd isotope signatures in submarine Samoan lavas will help clarify matters. The data provide clear evidence for the presence of recycled upper continental crust in the Samoan mantle and also support the idea that recycled continental material is involved in the formation of one of the mantle's isotopically distinct geochemical reservoirs, the so-called enriched mantle 'EM2' component.

Suggested Citation

  • Matthew G. Jackson & Stanley R. Hart & Anthony A. P. Koppers & Hubert Staudigel & Jasper Konter & Jerzy Blusztajn & Mark Kurz & Jamie A. Russell, 2007. "The return of subducted continental crust in Samoan lavas," Nature, Nature, vol. 448(7154), pages 684-687, August.
    • Handle: RePEc:nat:nature:v:448:y:2007:i:7154:d:10.1038_nature06048
    DOI: 10.1038/nature06048
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