Exposure history of lunar meteorites Queen Alexandra Range 93069 and 94269

K. Nishiizumi, M. W. Caffee, A. J T Jull, R. C. Reedy

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Cosmic-ray produced 14C (t1/2 = 5730 years), 36Cl (3.01 × 105 years), 26Al (7.05 × 105 years), and 10Be (1.5 × 106 years) in the recently discovered lunar meteorites Queen Alexandra Range 93069 (QUE 93069) and 94269 (QUE 94269) were measured by accelerator mass spectrometry. The abundance pattern of these four cosmogenic radionuclides and of noble gases indicates QUE 93069 and QUE 94269 were a paired fall and were exposed to cosmic rays near the surface of the Moon for at least several hundred million years before ejection. After the meteorite was launched from the Moon, where it had resided at a depth of 65-80 g/cm2, it experienced a short transition time, ∼20-50 ka, before colliding with the Earth. The terrestrial age of the meteorite is 5-10 ka. Comparison of the cosmogenic nuclide concentrations in QUE 93069/94269 and MAC 88104/88105 clearly shows that these meteorites were not ejected by a common event from the Moon.

Original languageEnglish (US)
Pages (from-to)893-896
Number of pages4
JournalMeteoritics and Planetary Science
Volume31
Issue number6
StatePublished - Nov 1996

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lunar meteorite
meteorites
meteorite
Moon
moon
histories
cosmic ray
history
cosmogenic radionuclide
cosmic rays
noble gas
accelerator mass spectrometry
nuclides
ejection
radioactive isotopes
rare gases
accelerators
mass spectroscopy
exposure

ASJC Scopus subject areas

  • Geophysics

Cite this

Exposure history of lunar meteorites Queen Alexandra Range 93069 and 94269. / Nishiizumi, K.; Caffee, M. W.; Jull, A. J T; Reedy, R. C.

In: Meteoritics and Planetary Science, Vol. 31, No. 6, 11.1996, p. 893-896.

Research output: Contribution to journalArticle

Nishiizumi, K. ; Caffee, M. W. ; Jull, A. J T ; Reedy, R. C. / Exposure history of lunar meteorites Queen Alexandra Range 93069 and 94269. In: Meteoritics and Planetary Science. 1996 ; Vol. 31, No. 6. pp. 893-896.
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