NDLI: Exposure history of lunar meteorites queen alexandra range 93069 and 94269

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Exposure history of lunar meteorites queen alexandra range 93069 and 94269

Content Provider	NASA Technical Reports Server (NTRS)
Author	Nishiizumi, K. Jull, A. J. T. Caffee, M. W. Reedy, R. C.
Copyright Year	1996
Description	Cosmic-ray produced C-14 (t(sub 1/2) = 5730 years), 36Cl (3.01 x 10(exp 5 years), Al-26 (7.05 x 10(exp 5 years), and Be-10 (1.5 x 10(exp 6 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/cm square, it experienced a short transition time, approximately 20-50 ka, before colliding with the Earth. The terrestrial age of the meteorite is 5-10 ka. Comparison ofthe 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.
File Size	447888
Page Count	4
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19980045765
Archival Resource Key	ark:/13960/t6547nd3q
Language	English
Publisher Date	1996-01-01
Access Restriction	Open
Subject Keyword	Astrophysics Moon Chlorine Meteoritic Composition Spectroscopic Analysis Mass Spectroscopy Exposure Aluminum Isotopes Beryllium 10 Isotope Ratios Rare Gases Cosmic Rays Meteorites Radioactive Isotopes Carbon 14 Cosmochemistry Ejection Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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