A comparison of solar and meteoritic abundances.
Abstract
Estimates of solar S/Ca and Na/Ca ratios, with uncertainties of about 15%, are presented. A preliminary estimate of solar Mg/Ca ratio is also presented. These ratios are found to be similar to the ratios found in C1 chondrites and dissimilar to the C2 and C3 chondrite ratios. It is concluded that C1 matter is a well-preserved condensate from parts of the solar nebula whose composition was very close to solar. Composition differences between C1 chondrites and interstellar grains that escaped vaporization are considered, and the possibility of metal fractionation involving these two forms of matter during star formation is suggested. Problems in determining accurate solar element ratios are discussed.
- Publication:
-
IAU Colloq. 39: Comets, Asteroids, Meteorites: Interrelations, Evolution and Origins
- Pub Date:
- 1977
- Bibcode:
- 1977cami.coll..385H
- Keywords:
-
- Abundance;
- Carbonaceous Chondrites;
- Meteoritic Composition;
- Solar Spectra;
- Calcium;
- Line Spectra;
- Sodium;
- Sulfur;
- Lunar and Planetary Exploration;
- Element Abundances:Meteorites;
- Element Abundances:Sun