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Al-rich Chondrules: Petrologic Basis for Their Diversity, and Relation to Type C CAIsAl-rich chondrules share mineralogical and chemical properties with, and are intermediate in a volatility sense between, CAIs and ferromagnesian chondrules. In some way they must be petrogenetic links between the two. A recent upsurge of interest in Al-rich chondrules is due to their constituent plagioclase feldspar and Al-rich glass being amenable to successful ion microprobe searches for radiogenic Mg-26, the decay product of Al-26 (t(sub 1/2) = 720,000 y). This has allowed estimates to be made of the time duration between CAI formation and the onset of Al-rich (and possibly, by extension, ferromagnesian) chondrule formation, on the order of 1.5-2.5 million years.
Document ID
20030110823
Document Type
Conference Paper
Authors
MacPherson, G. J. (National Museum of Natural History Washington, DC, United States)
Huss, G. R. (Arizona State Univ. Tempe, AZ, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Lunar and Planetary Science and Exploration
Funding Number(s)
CONTRACT_GRANT: NAG5-11543
CONTRACT_GRANT: NAG5-7396
CONTRACT_GRANT: NAG5-10468
CONTRACT_GRANT: NAG5-8158
Distribution Limits
Public
Copyright
Public Use Permitted.

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