Physics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9714717t&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. E9, p. 14,717-14,726.
Physics
50
Asteroids, Iron Meteorites, Liquid Metals, Magma, Planetary Cores, Planetary Evolution, Chemical Composition, Solar System Evolution, Surface Energy
Scientific paper
The 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.
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