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Survey of chondrule average properties in H-, L-, and LL-group chondrites - Are chondrules the same in all unequilibrated ordinary chondrites?The petrogenetic properties of chondrules in different unequilibrated ordinary chondrites (UOCs) are compared to averaged chondrule-suite values obtained from recent analyses of several H-group, L-group, and LL-group chondrites. The purpose of the study was to develop a data base for future statistical analyses of chondrite characteristics. Mean end-member compositions of olivine (mol percent Fa) and pyroxene (mol percent Fs) were used as indices of the relative degree of 'equilibration' of each chondrule suite. It is found that the bulk chondrule geometric-mean abundances of Na, Mg, and Ni are the same from one UOC to another, and show no major systematic trends related to the H-group, L-group, of LL-group parentage of the host chondrites. The patterns of rare-earth element abundances in the chondrules are also examined, and the results are compared with statistical analyses. It is concluded that multivariate statistical analysis of pooled UOC chondrule data is justified for chondrule bulk compositions, as long as the statistical results are not misinterpreted as the primary petrogenetic features of chondrules.
Document ID
19850044384
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Gooding, J. L.
(NASA Johnson Space Center Planetary Materials Branch, Houston, TX, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1983
Subject Category
Lunar And Planetary Exploration
Accession Number
85A26535
Funding Number(s)
CONTRACT_GRANT: NGL-32-004-064
CONTRACT_GRANT: NGL-32-002-039
Distribution Limits
Public
Copyright
Other

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