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Automated thin-film analyses of anhydrous interplanetary dust particles in the analytical electron microscopeAn AEM apparatus equipped with digital beam control has obtained quantitative point-count analyses of thin sections taken from eight anhydrous chondritic interplanetary dust particles (IDPs); between 200 and 500 X-ray analyses were collected from each thin section and analyzed for Mg, Al, Si, S, Ca, Cr, Mn, Fe, and Ni. Two types of anhydrous chondritic aggregates were observed in the eight IDPs: one highly porous, the other less so. The eight anhydrous IDPs are characterizable as mixtures of fine- and coarse-grained aggregates, large mineral grains, glass, and carbonaceous materials. Their elemental concentrations follow those of solar abundances, suggesting that they are unperturbed by aqueous alteration.
Document ID
19890054856
Document Type
Reprint (Version printed in journal)
Authors
Bradley, J. P. (McCrone Associates, Inc. Westmont, IL, United States)
Germani, M. S. (McCrone Associates, Inc. Westmont, IL, United States)
Brownlee, D. E. (Washington, University Seattle, United States)
Date Acquired
August 14, 2013
Publication Date
May 1, 1989
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 93
Issue: 1 Ma
ISSN: 0012-821X
Subject Category
LUNAR AND PLANETARY EXPLORATION
Funding Number(s)
CONTRACT_GRANT: NAS9-17749
Distribution Limits
Public
Copyright
Other