Metastable carbon in two chondritic porous interplanetary dust particles
Rietmeijer, F. J. M. & Mackinnon, Ian D. R. (1987) Metastable carbon in two chondritic porous interplanetary dust particles. Nature, 326(6109), pp. 162-165.
An understanding of carbonaceous matter in primitive extraterrestrial materials is an essential component of studies on dust evolution in the interstellar medium and the early history of the Solar System. We have suggested previously that a record of graphitization is preserved in chondritic porous (CP) aggregates and carbonaceous chondrites1,2 and that the detailed mineralogy of CP aggregates can place boundary conditions on the nature of both physical and chemical processes which occurred at the time of their formation2,3. Here, we report further analytical electron microscope (AEM) studies on carbonaceous material in two CP aggregates which suggest that a record of hydrocarbon carbonization may also be preserved in these materials. This suggestion is, based upon the presence of well-ordered carbon-2H (lonsdaleite) in CP aggregates W7029A and W7010A2. This carbon is a metastable phase resulting from hydrous pyrolysis below 300-350°C and may be a precursor to poorly graphitized carbons (PGCs) in primitive extraterrestrial materials2. © 1987 Nature Publishing Group.
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|Item Type:||Journal Article|
|Additional Information:||Cited By (since 1996): 10
Export Date: 19 February 2013
Language of Original Document: English
Correspondence Address: Rietmeijer, F.J.M.; Department of Geology, University of New Mexico, Albuquerque, NM 87131, United States
|Keywords:||interplanetary dust, stratospheric dust collection, chondritic porous aggregates, metastable carbon, ordered carbon 2H, extraterrestrial materials, carbonaceous chondrites|
|ISSN:||1476-4687 (online) 0028-0836 (print}|
|Subjects:||Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Extraterrestrial Geology (040302)
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Mineralogy and Crystallography (040306)
|Divisions:||Current > Institutes > Institute for Future Environments|
|Copyright Owner:||Copyright 1987 Nature Publishing Group and 2007 Elsevier B.V., All rights reserved.|
|Deposited On:||26 Feb 2013 22:43|
|Last Modified:||26 Feb 2013 22:43|
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