Abstract: An examination of the analytical data on chondrites indicates that the two most abundant lithophile elements, Si and Mg, are significantly fractionated in these meteorites. The SiO2/MgO average for all chondrites is 1.60, a value may be compared with the minimum magnitude of ~1.40 which is approximated by all carbonaceous chondrites (together with a few other chondrites) and the maximum magnitude of ~1.90 which approximated by all entstatite chondrites (plus a few other stones). The entstatite chondrites together with a few other Mg-deficient chondrites tend to form a seemingly well-defined upper boundary in a SiO2—Fe (total) diagram. Some of the Si-Mg-Fe relationships described in this paper may have a significant bearing on meteorite classification as they appear to be of a fundamental nature.
Publication Year: 1964
Publication Date: 1964-04-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 39
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