METALLIC IRON IN SEDIMENTS AT THE MESOZOIC-CENOZOIC K/T BOUNDARY
Рубрики: ОРИГИНАЛЬНЫЕ СТАТЬИ
Авторы:
1.
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia
Тип:
Статья
Страницы:
с 1
по 9
Статус:
Опубликован
Получено:
25.12.2008
Одобрено:
25.12.2008
Опубликовано:
25.12.2008
Язык материала:
английский
Ключевые слова:
cosmic dust, metallic iron, sediments, magnetic minerals, K/T boundary.
Аннотация (русский):
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.
Ключевые слова:
cosmic dust, metallic iron, sediments, magnetic minerals, K/T boundary.
cosmic dust, metallic iron, sediments, magnetic minerals, K/T boundary.
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