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Early planetesimal melting from an age of 4.5662 Gyr for differentiated meteorites

Author

Listed:
  • Joel Baker

    (Victoria University of Wellington)

  • Martin Bizzarro

    (Geological Institute
    Geological Museum)

  • Nadine Wittig

    (Geological Institute
    Geological Museum)

  • James Connelly

    (The University of Texas at Austin)

  • Henning Haack

    (Geological Museum)

Abstract

Angrites: early arrivals The latest ultra-precise measurement techniques have been used to obtain lead isotope ages for two examples of a rare type of meteorite, called basaltic angrites. These ‘differentiated’ meteorites are from parent bodies that were once molten and had solidified as a metal core and silicate mantle. Their absolute age is about 4.6 billion years, only a million years younger than the currently accepted minimum age of the Solar System. An excess of magnesium-26 in the angrite samples suggests that aluminium-26 decay triggered melting of the planetesimal that was the parent body.

Suggested Citation

  • Joel Baker & Martin Bizzarro & Nadine Wittig & James Connelly & Henning Haack, 2005. "Early planetesimal melting from an age of 4.5662 Gyr for differentiated meteorites," Nature, Nature, vol. 436(7054), pages 1127-1131, August.
    • Handle: RePEc:nat:nature:v:436:y:2005:i:7054:d:10.1038_nature03882
    DOI: 10.1038/nature03882
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    Cited by:

    1. Yan Hu & Frédéric Moynier & Martin Bizzarro, 2022. "Potassium isotope heterogeneity in the early Solar System controlled by extensive evaporation and partial recondensation," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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