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Ca-Al-rich chondrules and inclusions in ordinary chondritesCa-Al-rich objects, hitherto mostly found in carbonaceous chondrites, are shown to be widespread, albeit rare, constituents of type 3 ordinary chondrites. Widespread occurrence and textural similarities of Ca-Al-rich chondrules to common, Mg-Fe-rich chondrules suggest that they formed by related processes. It is suggested in this article that Ca-Al-rich chondrules were formed by total melting and crystallization of heterogeneous, submillimeter- to submillimeter-sized dustballs made up of mixtures of high-temperature, Ca-Al-rich and lower-temperature, Na-K-rich components.
Document ID
19830057375
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bischoff, A.
(Muenster, Universitaet Muenster, West Germany; New Mexico, University, Albuquerque, NM, United States)
Keil, K.
(New Mexico, University Albuquerque, NM, United States)
Date Acquired
August 11, 2013
Publication Date
June 16, 1983
Publication Information
Publication: Nature
Volume: 303
ISSN: 0028-0836
Subject Category
Lunar And Planetary Exploration
Accession Number
83A38593
Funding Number(s)
CONTRACT_GRANT: NGL-32-004-064
Distribution Limits
Public
Copyright
Other

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