Cometary evolution : Clues from chondritic interplanetary dust particles
Rietmeijer, Frans J.M. & Mackinnon, I.D.R. (1987) Cometary evolution : Clues from chondritic interplanetary dust particles. In Rolfe, E.J. & Battrick, B. (Eds.) Proceedings of the International Symposium on the Diversity and Similarity of Comets, European Space Agency, Brussels, Belgium., pp. 363-367.
Cometary and interplanetary dust particles (IDP) are compared, and the mineralogical evolution of comet nuclei is discussed. Chondritic IDP have properties consistent with properties expected for cometary dust. The complex and varied mineralogy of these particles may indicate mineral alteration processes that occur in comet nuclei. Depending on the thermal budget of a comet, the upper few meters of nucleus material may maintain temperatures within regimes of hydrocryogenic (200 to 237K) and low-temperature aqueous (274 to 400K) alteration. Thus, layer silicates, carbonates, and sulfates may be important components of cometary dust and, correspondingly are common constituents of chondritic IDPs. Alteration of comet starting materials may be a common occurrence, and depends on the specific physical and chemical properties of each individual comet.
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|Item Type:||Conference Paper|
|Keywords:||CHEMICAL COMPOSITION, COMET NUCLEI, INTERPLANETARY DUST, CHONDRITES, MINERALOGY|
|ISBN:||SEE N88-21884 14-91|
|Subjects:||Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Extraterrestrial Geology (040302)|
|Divisions:||Current > Institutes > Institute for Future Environments|
|Deposited On:||11 Mar 2013 22:37|
|Last Modified:||11 Mar 2013 22:37|
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