OC Chondrule, Rim and Matrix Compositions: A Model

Details OC Chondrule, Rim and Matrix Compositions: A Model OC Chondrule, Rim and Matrix Compositions: A Model

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27....7a&link_type=abstract

Lunar and Planetary Science, volume 27, page 7

Computer Science

1

Chondrites: Ordinary, Chondrules, Matrix, Rims

Scientific paper

The peak temperatures chondrules experienced, based on their liquidus temperatures, range from 1500 K to 2000 K. At these temperatures and nebular pressures most elements are volatile, but generally the alkali metals and S have been the only major elements considered as such. However, correlated variations in Mg and Al abundances, if they are not due to precursor compositions, require the loss of up to 50% of the SiO2 from some chondrules. The more volatile FeO would have been lost to an even greater extent. Here it is shown that if the material lost from chondrules recondenses onto the fine grained material which survived the chondrule forming process, chondrule rim and matrix compositions can be explained.

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