METALLIC IRON IN SEDIMENTS AT THE MESOZOIC-CENOZOIC K/T BOUNDARY
Rubrics: ORIGINAL ARTICLES
Authors:
1.
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia
Type:
Article
Pages:
from 1
to 9
Status:
Published
Received:
25.12.2008
Accepted:
25.12.2008
Published:
25.12.2008
Language:
English
Keywords:
cosmic dust, metallic iron, sediments, magnetic minerals, K/T boundary.
Abstract (English):
Thermomagnetic analysis was performed on sediments close to the Mesozoic-Cenozoic K/T boundary in the following sections: Gams Austria, Tetritskaro Georgia, Klyuchi and Teplovka the Volga Region, Russia, and Koshak Turkmenia. Positive correlation is found between the contents of terrestrial magnetic minerals Fe-hydroxides, titanomagnetite, magnetite and extraterrestrial metallic iron, i.e., between the minerals of different origin and with different pre-accumulation history. The observed different values of positive correlation between the content of the above listed minerals depend from variation in redeposition rate. The correlation is absent altogether because of different provenance and the character of sedimentation as it is observed for the boundary layer and some sections Gams, the sections from the Volga region. In contrast, stronger correlation is found if redeposition is important Tetritskaro, Koshak.
Thermomagnetic analysis was performed on sediments close to the Mesozoic-Cenozoic K/T boundary in the following sections: Gams Austria, Tetritskaro Georgia, Klyuchi and Teplovka the Volga Region, Russia, and Koshak Turkmenia. Positive correlation is found between the contents of terrestrial magnetic minerals Fe-hydroxides, titanomagnetite, magnetite and extraterrestrial metallic iron, i.e., between the minerals of different origin and with different pre-accumulation history. The observed different values of positive correlation between the content of the above listed minerals depend from variation in redeposition rate. The correlation is absent altogether because of different provenance and the character of sedimentation as it is observed for the boundary layer and some sections Gams, the sections from the Volga region. In contrast, stronger correlation is found if redeposition is important Tetritskaro, Koshak.
Keywords:
cosmic dust, metallic iron, sediments, magnetic minerals, K/T boundary.
cosmic dust, metallic iron, sediments, magnetic minerals, K/T boundary.
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