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Iron Meteorites from Antarctica: More Specimens, Still 40% UngroupedI summarize the data obtained to date on independent Antarctic iron meteorites by our UCLA neutron-activation laboratory. With about 5 exceptions, the listed values are the means of duplicate determinations. We have now analyzed 40 independent iron meteorites; I list 8 other irons that proved to be paired with meteorites. Because of the close relationship between pallasites and iron meteorites, I also list our data for two Antarctic pallasites that were studied at UCLA. Our new results confirm the previously reached conclusion about the abundance of ungrouped irons. In fact, the ungrouped fraction has increased slightly; of the 40 irons 16 are ungrouped, a fraction of 0.40. The two meteorites with pallasite structures are both small (approx. 50 g); one is ungrouped, the other a high-Ir anomalous member of the main-group pallasites (PMG).
Document ID
20000034791
Document Type
Conference Paper
Authors
Wasson, J. T. (California Univ. Los Angeles, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Publication Information
Publication: Workshop on Extraterrestrial Materials from Cold and Hot Deserts
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NAG5-4568
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle20000034770Analytic PrimaryWorkshop on Extraterrestrial Materials from Cold and Hot Deserts
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