A Younger Age for ALH84001 and Its Geochemical Link to Shergottite Sources in Mars

  title={A Younger Age for ALH84001 and Its Geochemical Link to Shergottite Sources in Mars},
  author={T. J. Lapen and Minako Righter and A. D. Brandon and Vinciane Debaille and Brian L. Beard and John T. Shafer and Anne H. Peslier},
  pages={347 - 351}
Less Old Martian Meteorite The oldest Martian meteorite known, ALH84001, was thought to be a remnant of primordial martian crust formed during solidification of an early magma ocean. Using isotope data, Lapen et al. (p. 347) revised the crystallization age of this meteorite from 4.51 billion years to 4.09 billion years ago, meaning that this rock cannot be a fragment of primordial crust that escaped the period of intense bombardment that occurred between 4.25 and 4.10 billion years ago. The… 

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Carbonate formation events in ALH 84001 trace the evolution of the Martian atmosphere

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The history of Allan Hills 84001 revised: Multiple shock events

  • A. Treiman
  • Geology
    Meteoritics & planetary science
  • 1998
Abstract— The geologic history of Martian meteorite Allan Hills (ALH) 84001 is more complex than previously recognized, with evidence for four or five crater‐forming impacts onto Mars. This history