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The carbon chemistry of meteorites: Relationships to cometsThe carbonaceous meteorites exhibiting alteration by liquid water bear a strong relationship to comets. Not only is their elemental composition closer to solar in relative abundances than other meteorites, they are water rich; and they contain isotopic compositions among refractory and volatile elements indicative of presolar components. Some of these isotopic anomalies occur in organic compounds and carbonaceous grains signifying the presence of discrete and identifiable carbon components derived from interstellar and circumstellar matter. Insofar as comets and meteorites are ultimately formed from interstellar gas and dust, and comets have been subjected to considerably less aqueous and thermal evolution than carbonaceous meteorites, the interstellar imprint should be much stronger and better preserved in comets.
Document ID
19900007299
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chang, S.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Lunar and Planetary Inst., Workshop on Analysis of Returned Comet Nucleus Samples
Subject Category
Astrophysics
Accession Number
90N16615
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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