How well do we know “Cosmic” abundances? |
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| Authors: | Edward Anders |
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| Institution: | 1. Enrico Fermi Institute and Department of Chemistry University of Chicago, Chicago, Illinois 60637 USA;2. Physikalisches Institut, Universität Bern, Switzerland |
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| Abstract: | Five lines of evidence suggest that Cl chondrites closely approximate the condensable fraction of primordial solar-system matter: continuity of isotopic and elemental abundance trends, agreement with solar and cosmic-ray abundances, fractionation patterns among chondrites, and absence of chondrules. Maximum differences between Cl abundances and true solar-system abundances are estimated as factors of 2–5 for individual elements and a factor of 1.5 or less for groups of 10 or more elements. |
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