Computer Science
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989znata..44..924s&link_type=abstract
Z. Naturforsch., A, Vol. 44a, No. 10, p. 924 - 934
Computer Science
2
Chondrites: Chemical Composition, Planets: Chemical Composition, Minor Planets: Chemical Composition
Scientific paper
The authors review the composition of chondrites and conclude that compositions of grains and planetesimals in the central layer or midplane of the nebula did not vary simply with heliocentric distance. Instead they believe that there was considerable local chemical heterogeneity in the nebular midplane and that the extent of planetesimal transportation within the midplane may have been overestimated. The authors infer that evidence for these chemical heterogeneities in the midplane may be preserved in the planets, and that local chemical heterogeneities were just as important as any nebula-wide chemical gradients produced by condensation. It is concluded that the asteroids may have preserved rather faithfully a record of the chemical heterogeneities in the nebular midplane between the formation locations of Mars and Jupiter and that this record may offer best hope of understanding the nature and cause of primordial chemical variations.
Newsom Horton E.
Scott Edward R. D.
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