Computer Science
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994metic..29..616z&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 29, no. 5, p. 616-620
Computer Science
20
Asteroids, Chemical Composition, Chondrites, Interplanetary Dust, Meteoritic Composition, Olivine, Pyroxenes, Classifications, Electron Microscopy, Graphs (Charts), Hydrolysis, Ice, Porosity, Tables (Data), Variations
Scientific paper
We report here analyses of olivines and pyroxenes, and petrofabrics of 27 chondritic interplanetary dust particles (IDPs), comparing those from anhydrous and hydrous types. Approximately 40% of the hydrous particles contain diopside, a probable indicator of parent body thermal metamorphism, while this mineral is rarely present in the anhydrous particles. Based on this evidence, we find that hydrous and anhydrous IDPs are, in general, not directly related, and we conclude that olivine and pyroxene major-element compositions can be used to help discriminate between IDPs that are (1) predominantly nebular condensates, and lately resided in anhydrous or icy (no liquids) primitive parent bodies, and (2) those originating from more geochemically active parent bodies (probably hydrous and anhydrous asteroids).
Barrett Ruth A.
Zolensky Michael E.
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