Cosmic dust and micrometeorites in the transitional clay layer at the Cretaceous-Paleogene boundary in the gams section (Eastern Alps): Morphology and chemical composition

Results of investigation of the cosmic matter in the transitional clay layer at the Cretaceous-Paleogene boundary in the Gams section, Eastern Alps, are presented. A great diversity of iron microspherules and particles of different morphologies, pure nickel spherules, awaruite (Fe 3 Ni) particles, a...

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Bibliographic Details
Published in:Izvestiya. Physics of the solid earth 2008-07, Vol.44 (7), p.555-569
Main Authors: Grachev, A. F., Korchagin, O. A., Tselmovich, V. A., Kollmann, H. A.
Format: Article
Language:English
Subjects:
Clay
Cretaceous
Crystals
Earth and Environmental Science
Earth Sciences
Geophysics
Geophysics/Geodesy
Meteors & meteorites
Nickel
Paleocene
Paleogene
Studies
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Summary:Results of investigation of the cosmic matter in the transitional clay layer at the Cretaceous-Paleogene boundary in the Gams section, Eastern Alps, are presented. A great diversity of iron microspherules and particles of different morphologies, pure nickel spherules, awaruite (Fe 3 Ni) particles, and diamond crystals are discovered. Iron microspherules are also met in the overlying Paleocene deposits, but their diversity there is not great. The discovered metallic microspherules and particles are described, their chemical compositions are presented, and their origin is discussed.
ISSN:1069-3513
1555-6506
DOI:10.1134/S1069351308070069