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A short timescale for terrestrial planet formation from Hf–W chronometry of meteorites

Author

Listed:
  • Qingzhu Yin

    (Harvard University)

  • S. B. Jacobsen

    (Harvard University)

  • K. Yamashita

    (Harvard University
    University of Kobe)

  • J. Blichert-Toft

    (Laboratoire des Sciences de la Terre, Ecole Normale Supérieure de Lyon)

  • P. Télouk

    (Laboratoire des Sciences de la Terre, Ecole Normale Supérieure de Lyon)

  • F. Albarède

    (Laboratoire des Sciences de la Terre, Ecole Normale Supérieure de Lyon)

Abstract

Determining the chronology for the assembly of planetary bodies in the early Solar System is essential for a complete understanding of star- and planet-formation processes. Various radionuclide chronometers (applied to meteorites) have been used to determine that basaltic lava flows on the surface of the asteroid Vesta formed within 3 million years (3 Myr) of the origin of the Solar System1,2,3. Such rapid formation is broadly consistent with astronomical observations of young stellar objects, which suggest that formation of planetary systems occurs within a few million years after star formation4,5. Some hafnium–tungsten isotope data, however, require that Vesta formed later6 (∼16 Myr after the formation of the Solar System) and that the formation of the terrestrial planets took a much longer time7,8,9,10 (62-14+4504 Myr). Here we report measurements of tungsten isotope compositions and hafnium–tungsten ratios of several meteorites. Our measurements indicate that, contrary to previous results7,8,9,10, the bulk of metal–silicate separation in the Solar System was completed within

Suggested Citation

  • Qingzhu Yin & S. B. Jacobsen & K. Yamashita & J. Blichert-Toft & P. Télouk & F. Albarède, 2002. "A short timescale for terrestrial planet formation from Hf–W chronometry of meteorites," Nature, Nature, vol. 418(6901), pages 949-952, August.
    • Handle: RePEc:nat:nature:v:418:y:2002:i:6901:d:10.1038_nature00995
    DOI: 10.1038/nature00995
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