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Ion microprobe magnesium isotope analysis of plagioclase and hibonite from ordinary chondritesIon and electron microprobes were used to examine Mg-26 excesses from Al-26 decay in four Al-rich objects from the type 3 ordinary hibonite clast in the Dhajala chondrite. The initial Al-26/Al-27 ratio was actually significantly lower than Al-rich inclusions in carbonaceous chondrites. Also, no Mg-26 excesses were found in three plagioclase-bearing chondrules that were also examined. The Mg-26 excesses in the hibonite chondrites indicated a common origin for chondrites with the excesses. The implied Al-26 content in a proposed parent body could not, however, be confirmed as a widespread heat source in the early solar system.
Document ID
19840053953
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hinton, R. W.
(Chicago, University Chicago, IL, United States)
Bischoff, A.
(New Mexico, University Albuquerque, NM; Muenster, Universitaet, Muenster, Germany)
Date Acquired
August 12, 2013
Publication Date
March 8, 1984
Publication Information
Publication: Nature
Volume: 308
ISSN: 0028-0836
Subject Category
Lunar And Planetary Exploration
Accession Number
84A36740
Funding Number(s)
CONTRACT_GRANT: NAG9-30
CONTRACT_GRANT: NGL-14-001-169
CONTRACT_GRANT: NAG9-51
CONTRACT_GRANT: NGL-32-004-064
Distribution Limits
Public
Copyright
Other

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