Melting, ablation, and vapor phase condensation during atmospheric passage of the Bjurbole Meteorite
Rietmeijer, Frans J.M. & Mackinnon, Ian D.R. (1984) Melting, ablation, and vapor phase condensation during atmospheric passage of the Bjurbole Meteorite. Journal of Geophysical Research, 89(S02), B597-B604.
A detailed study of the Bjurbole fusion crust using scanning electron microscopy (SEM) and energy dispersive analysis (EDS) shows that filamentary crystals and ablation spheres may form on the meteoroid surface. Filamentary crystals, hollow spheres, and porous regions of the surface point to a period of intense vapor phase activity during atmospheric passage. Filamentary crystals can be divided into three categories on the basis of bulk composition and morphology. Two types of filamentary crystals are vapor phase condensation products formed during atmospheric entry of the meteoroid. The other type forms by the interaction of seawater with the fusion surface. The density and composition of ablation spheres varies with the flight orientation of the meteorite. The size range and composition of iron-nickel spheres on the surface of Bjurbole are similar to spheres collected in the stratosphere. A comparison of stratospheric dust collections with meteorite surfaces may provide further insight into the mechanisms of meteoroid entry into planetary atmospheres.
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|Item Type:||Journal Article|
|Additional Information:||GeoRef, Copyright 2009, American Geological Institute.
|Keywords:||ablation, Bjurbole Meteorite, condensation, fusion, gaseous phase, L chondrites, melting, meteorite flux, meteorites, SEM data, spherules, stony meteorites, textures, X-ray spectra|
|Subjects:||Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)
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|
|Deposited On:||31 Jan 2013 01:57|
|Last Modified:||31 Jan 2013 01:58|
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