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Widespread magmatic activities on the angrite parent body at 4562 Ma ago


Mn-Cr chronology of four quenched angrites showed that they formed nearly at the same time (4562 Ma) on the surface of the parent-body. Based on the chemical compositions, the cosmic ray exposure ages, and considerations on the thermal history of an achondrite parent-body, we suggest that the four angrites formed on top of a shallow magma ocean on the angrite parent body.


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Correspondence to Naoji Sugiura.

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Sugiura, N., Miyazaki, A. & Yanai, K. Widespread magmatic activities on the angrite parent body at 4562 Ma ago. Earth Planet Sp 57, e13–e16 (2005).

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Key words

  • Age
  • angrites
  • Mn-Cr dating
  • SIMS