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Chemical studies of H chondrites. 5: Temporal variations of sourcesWe report Cl-36 (301-kyr half-life) data obtained by accelerator mass spectrometry allowing nominal terrestrial ages to be determined for 39 Antarctic H4-6 chondrites for which contents of volatile trace elements are known. The compositional difference between these Antarctic meteorites and 58 non-Antarctic falls increases with terrestrial age and, using multivariate statistical techniques, becomes highly significant for Antarctic samples with ages greater than 50 kyr. The compositional difference is inconsistent with trivial causes such as weathering and seems to reflect differences in thermal histories of parent sources. Temporal source variations for the H chondrite flux on Earth thus exist not only on a short-term, 40 years, basis (Dodd et al., 1993) but also on a long-term, greater than 50 kyr, basis.
Document ID
19950052479
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Michlovich, Edward S.
(Purdue University West Lafayette, IN, United States)
Wolf, Stephen F.
(Purdue University West Lafayette, IN, United States)
Wang, Ming-Sheng
(Purdue University West Lafayette, IN, United States)
Vogt, Stephan
(Purdue University West Lafayette, IN, United States)
Elmore, David
(Purdue University West Lafayette, IN, United States)
Lipschutz, Michael E.
(Purdue University West Lafayette, IN, United States)
Date Acquired
August 16, 2013
Publication Date
February 25, 1995
Publication Information
Publication: Journal of Geophysical Research
Volume: 100
Issue: E2
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
95A84078
Funding Number(s)
CONTRACT_GRANT: NAGW-3460
CONTRACT_GRANT: NAGW-3396
CONTRACT_GRANT: NSF EAR-92-14636
CONTRACT_GRANT: NAG9-580
CONTRACT_GRANT: NSF EAR-89-16667
CONTRACT_GRANT: NSF EAR-93-05589
CONTRACT_GRANT: NAG9-48
Distribution Limits
Public
Copyright
Other

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