2001年
General Characterization of Antarctic micrometeorites Collected by the 39th Japanese Antarctic Research Expedition : Consortium Study of JARE AMMs (III)
Antarctic Meteorite Research
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- 巻
- 14
- 号
- 14
- 開始ページ
- 89
- 終了ページ
- 107
- 記述言語
- 英語
- 掲載種別
- 研究論文(大学,研究機関等紀要)
From November 1998 to January 1999,the 39th Japanese Antarctic Research Expedition (JARE-39) undertook Japanese first large-scale collection of Antarctic micrometeorites (AMMs), with sizes larger than 10μm, at the Meteorite Ice Field around the Yamato Mountains in Antarctica (at three different locations, for a total of 24 collection sites). The number of collected AMMs larger than 40μm is estimated to be about 5000. Here we present the general characterization (i.e., micro-morphology and surface chemical composition using SEM/EDS) of ∿810 AMMs chosen from 5 of the 24 sites. Additionally, the mineral composition of 61 out of 810 AMMs was determined by Synchrotron X-ray radiation. Preliminary results on mineralogical and chemical compositions show similarities with that of previous studies, even though a pronounced alteration of some AMMs is noticed. A correlation is found between the Mg/Si ratio at the sample's surfaces of unmelted AMMs and the age of snow/ice in which the AMMs are embedded.
- リンク情報
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- CiNii Articles
- http://ci.nii.ac.jp/naid/120005506941
- CiNii Books
- http://ci.nii.ac.jp/ncid/AA11182426
- URL
- http://id.nii.ac.jp/1291/00006000/
- ID情報
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- CiNii Articles ID : 120005506941
- CiNii Books ID : AA11182426