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Core formation in asteroidsThe chemical and physical aspects of metal segregation in asteroids are considered. Evidence for the existence of metallic cores in asteroids, meteorite parent bodies, and planetesimals and for the amount of melting required to form cores is reviewed, and the physics of metal segregation is discussed. These considerations lead to the conclusion that about 50 percent of melting is required for metal to drain away and form a core. It is pointed out that such high amounts of melting were not always attained in asteroids, indicating that many asteroids might consist of partially differentiated silicates and metallic masses that did not segregate to a core. It is suggested that S asteroids might represent such partially differentiated bodies.
Document ID
19930026565
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Taylor, G. J.
(Hawaii Univ. at Manoa, Honolulu, United States)
Date Acquired
August 15, 2013
Publication Date
September 25, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: E9
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
93A10562
Funding Number(s)
CONTRACT_GRANT: NAG9-454
Distribution Limits
Public
Copyright
Other

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