Mineralogy of chondritic porous aggregates : current status

McKay, David S., Rietmeijer, Frans J.M., & Mackinnon, Ian D.R. (1985) Mineralogy of chondritic porous aggregates : current status. In Lunar and Planetary Science Conference, Lunar and Planetary Institute, Houston, TX, pp. 536-537.

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Chondritic porous aggregates (CPA's) belong to an important subset of small particles (usually between 5 and 50 micrometers) collected from the stratosphere by high flying aircraft. These aggregates are approximately chondritic in elemental abundance and are composed of many thousands of small­er, submicrometer particles. CPA particles have been the subject of intensive study during the past few years [1-3] and there is strong evidence that they are a new class of extraterrestrial material not represented in the meteorite collection [3,4]. However, CPA's may be related to carbonaceous chondrites and in fact, both may be part of a continuum of primitive extraterrestrial materials [5]. The importance of CPA's stems from suggestions that they are very primitive solar system material possibly derived from early formed proto­ planets, chondritic parent bodies, or comets [3, 6]. To better understand the origin and evolution of these particles, we have attempted to summarize all of the mineralogical data on identified CPA's published since about 1976.

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ID Code: 56535
Item Type: Conference Paper
Refereed: Yes
Additional Information: GeoRef, Copyright 2009, American Geological Institute.
chondritic composition
Keywords: aggregate, atmosphere, characterization, meteoroids, mineral composition, particulate materials, porous materials, sampling, stratosphere
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Tropospheric and Stratospheric Physics (040108)
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 1985 (please consult the authors).
Deposited On: 30 Jan 2013 22:42
Last Modified: 10 Apr 2013 16:52

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