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Cosmogenic nuclides in core samples of the Chico L6 chondrite - Evidence for irradiation under high shieldingResults are presented from an analysis of core samples obtained from different depths of the Chico (New Mexico) L6 chondrite for various cosmogenic nuclides (Be-10, Al-26, and stable isotopes of He, Ne, and Ar). The relationships between the measured abundances of cosmogenic nuclides and cosmogenic Ne-22/Ne-21 ratio were compared with predictions of recent semiempirical models of Graf et al. (1990) and Reedy (1991), and it was found that both models closely reproduce the observed trends and absolute values of the data obtained. Noble gas data indicate that Chico experienced shielding similar to that of Jilin and greater than those of the Knyahinya or the Keyes chondrites. The exposure history for Chico is discussed.
Document ID
19930029964
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Garrison, D. H.
(Lockheed Engineering & Sciences Co.; NASA, Johnson Space Center Houston, TX, United States)
Bogard, D. D.
(NASA Johnson Space Center Houston, TX, United States)
Albrecht, A. A.
(Rutgers Univ. New Brunswick, NJ, United States)
Vogt, S.
(Purdue Univ. West Lafayette, IN, United States)
Herzog, G. F.
(Rutgers Univ. New Brunswick, NJ, United States)
Klein, J.
(Pennsylvania Univ. Philadelphia, United States)
Fink, D.
(Australian Nuclear Science and Technology Organisation Menai, Australia)
Dezfouly-Arjomandy, B.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Middleton, R.
(Pennsylvania Univ. Philadelphia, United States)
Date Acquired
August 15, 2013
Publication Date
September 1, 1992
Publication Information
Publication: Meteoritics
Volume: 27
Issue: 4
ISSN: 0026-1114
Subject Category
Lunar And Planetary Exploration
Accession Number
93A13961
Distribution Limits
Public
Copyright
Other

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