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Isotopic enhancements of 17O and 18O from solar wind particles in the lunar regolith

Author

Listed:
  • Trevor R. Ireland

    (The Australian National University)

  • Peter Holden

    (The Australian National University)

  • Marc D. Norman

    (The Australian National University
    Lunar and Planetary Institute)

  • Jodi Clarke

    (The Australian National University
    Monash University)

Abstract

Dust in time In theory the outer layers of the Sun should preserve the original composition of the gas from which the Solar System formed. Gaining access to those outer layers is not an option, so indirect methods of information gathering are being tried. Latest of these are oxygen isotope measurements from lunar soil brought back by Apollo 11. Various lines of evidence suggest that the soil tested, from lunar sample 10084, had particularly high exposure to the solar wind. The lunar grains are underabundant in oxygen-16 compared with Earth, Mars and bulk meteorites. This contrasts with an earlier finding based on studies of ancient metal grains, and presents a tricky problem: on current models there is no clear way to explain higher oxygen-16 abundance in Solar System rocks than in the Sun.

Suggested Citation

  • Trevor R. Ireland & Peter Holden & Marc D. Norman & Jodi Clarke, 2006. "Isotopic enhancements of 17O and 18O from solar wind particles in the lunar regolith," Nature, Nature, vol. 440(7085), pages 776-778, April.
    • Handle: RePEc:nat:nature:v:440:y:2006:i:7085:d:10.1038_nature04611
    DOI: 10.1038/nature04611
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