Antarctic micrometeorites collected at the Dome Fuji Station
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概要
- 論文の詳細を見る
Antarctic micrometeorites (AMMs) were found among the precipitated fine particles recovered from a water tank in the Dome Fuji Station. These AMMs had been contained in the recent fallen snow around the station. Initial processing of the precipitated particles revealed that they were dominated by natural and artificial terrestrial materials, thus a series of processes were developed to separate AMMs from terrestrial particles. The recovery rate of AMMs by the processes was approximately 45% in weight, which was determined from a weight ratio of recovered/accreted AMMs. The micro-morphology and major-element concentration of the recovered AMMs were characterized. They appear to have been heated upon atmospheric entry to varying temperatures and can be classified into two major types based on the degree of heating : (1) fine-grained, irregular-shaped, partial-melted micrometeorites with chondritic composition, and (2) total-melted spherical micrometeorites with chondritic composition except for volatile elements. A digital catalog for the AMMs identified in this study was established on the web site [URL : http : //dust. cc. gakushuin. ac. jp/], in which optical characteristics, high-resolution images, and chemical compositions of individual AMMs are presented. The AMMs listed in the catalog are the first Japanese collection of extraterrestrial dust. The criterion and techniques developed for the selection and initial analysis of AMMs are applicable for the dust samples that are being collected by the 39th Japanese Antarctic Research Expedition team.
- 国立極地研究所の論文
著者
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Nakamura T
Department Of Earth And Planetary Sciences Faculty Of Sciences Kyushu University
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Nakamura Tomoki
Earth and Planetary Sciences, Graduate School of Science, Kyushu University
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Nakai Izumi
Department of Applied Chemistry, Science University of Tokyo
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Imae Naoya
National Institute of Polar Research
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Nakai Izumi
Department Of Applied Chemistry Science University Of Tokyo
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Nakai Izumi
Department Of Applied Chemistry Faculty Of Science Science University Of Tokyo
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Nakamura Tomoki
Earth And Planetary Science Faculty Of Science Kyushu University
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Nakai Izumi[etc]
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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Nakai Izumi[etc]
Department of Applied Chemistry, Science University of Tokyo
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