New data on the microstructure of silicate Cosmic spherules

Cosmic spherules (CSs), scoriaceous, and unmelted micrometeorites are main micrometeorite types. According to the generally accepted aerodynamic model, CSs are formed from micrometeoroids, which were melted during high speed entry in the Earth atmosphere. Transmission electron microscopy (TEM) study...

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Bibliographic Details
Published in:Doklady earth sciences 2012-03, Vol.443 (1), p.417-419
Main Authors: Khisina, N. R., Wirth, R., Badyukov, D. D.
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Geochemistry
Glacial deposits
Glaciers
Microstructure
Silica
Silicates
Transmission electron microscopy
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Summary:Cosmic spherules (CSs), scoriaceous, and unmelted micrometeorites are main micrometeorite types. According to the generally accepted aerodynamic model, CSs are formed from micrometeoroids, which were melted during high speed entry in the Earth atmosphere. Transmission electron microscopy (TEM) study of silicate CSs with a cryptocrystalline texture collected in the area of the Tunguska event and extracted from glacier deposits of Novaya Zemlya allowed us to obtain new data on the microtextural patterns of spherules of this type.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X12030257