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Mid-infrared transmission spectra of individual Antarctic micrometeorites and carbonaceous chondrites
https://doi.org/10.15094/00005999
https://doi.org/10.15094/00005999238c9ebf-0de7-47a0-acf0-ae3f69d3389a
名前 / ファイル | ライセンス | アクション |
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KJ00000040991 (1.6 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2001-03-01 | |||||
タイトル | ||||||
タイトル | Mid-infrared transmission spectra of individual Antarctic micrometeorites and carbonaceous chondrites | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00005999 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Osawa,Takahito
× Osawa,Takahito× Kagi,Hiroyuki× Nagao,Keisuke |
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著者所属(英) | ||||||
en | ||||||
Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo/Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo/Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Mid-infrared absorption spectra were obtained for 6 carbonaceous chondrites and 6 Antarctic micrometeorites (AMMs) with transmission light using an IR microscope. Obvious absorption bands caused by O-H stretching vibration at 3400cm^<-1> and H-O-H bending vibration at 1640cm^<-1> were detected for CI, CM2,CR2,and CO3 chondrites. All the chondrite samples had Si-O stretching band at around 1000cm^<-1>. Allende (CV3) exhibited only Si-O stretching band at near 900cm^<-1> and no O-H bands. Infrared absorption spectra for AMMs showed no O-H stretching vibration reflecting their dry condition, except for F97AC019 and F97AC017 with weak O-H stretching band. Heating experiments on the grains of Murchison and Orgueil with sizes as small as AMMs (∿100μm) were carried out in order to clarify the dehydration effect of micrometeorite during the atmospheric entry. Heating times were 30 and 60s at temperatures every 100℃ from 500℃ to 1000℃. At relatively lower temperature condition (≤700℃), water in carbonaceous chondrites was not depleted. O-H stretching vibration at 3400cm^<-1> was, however, vanished at higher temperature (≥800℃). This might show that AMMs were heated to 800℃ or more during atmospheric entry if our hearting duration is reasonable. Noble gas measurement using laser heating was performed for individual AMMs after the infrared microscopic analyses. Solar-He was detected for 4 samples. F97AC019 with very high concentration of helium (8.1×10^<-3>cm^3 STP/g) preserve solar-Ne and primordial trapped argon component. We have discovered an extraordinary AMM, F97AC021,with highly concentrated organic matters. Intense C-H stretching vibration at 2900cm^<-1> and complex absorption pattern appeared in the range from 1400cm^<-1> to 1800cm^<-1> were detected. The AMM might have a potential to have plenty of extraterrestrial organic compounds. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11182426 | |||||
書誌情報 |
Antarctic meteorite research 巻 14, p. 71-88, 発行日 2001-03 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |