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Iron meteorite evidence for early formation and catastrophic disruption of protoplanets

Author

Listed:
  • Jijin Yang

    (University of Massachusetts, Amherst, Massachusetts 01003, USA)

  • Joseph I. Goldstein

    (University of Massachusetts, Amherst, Massachusetts 01003, USA)

  • Edward R. D. Scott

    (Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA)

Abstract

Collision course A new study of the cooling rates of IVA group iron meteorites provides support for a recent proposal that metal-rich meteorites come from the debris of collisions between Moon-to-Mars sized bodies. The terrestrial planets of the Solar System are thought to have formed by collisional growth from smaller bodies, and the new results are consistent with an origin in a metallic body with a radius of 150 km that cooled in space, and not from the metallic core of a much smaller rocky asteroid, as previously believed. The metallic body probably formed in the early Solar System as a result of a collision between protoplanets before the planets formed.

Suggested Citation

  • Jijin Yang & Joseph I. Goldstein & Edward R. D. Scott, 2007. "Iron meteorite evidence for early formation and catastrophic disruption of protoplanets," Nature, Nature, vol. 446(7138), pages 888-891, April.
    • Handle: RePEc:nat:nature:v:446:y:2007:i:7138:d:10.1038_nature05735
    DOI: 10.1038/nature05735
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