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タイトル: | Origin of Spherule Samples Recovered from Antarctic Ice Sheet-Terrestrial or Extraterrestrial? |
著者: | Sekimoto, Shun Kobayashi, Takayuki Takamiya, Koichi https://orcid.org/0009-0008-1205-3173 (unconfirmed) Ebihara, Mitsuru Shibata, Seiichi |
著者名の別形: | 関本, 俊 髙宮, 幸一 |
キーワード: | Antarctic Extraterrestrial Iridium Neutron Activation Analysis Spherule |
発行日: | 1-Apr-2016 |
出版者: | Elsevier Korea LLC |
誌名: | Nuclear Engineering and Technology |
巻: | 48 |
号: | 2 |
開始ページ: | 293 |
終了ページ: | 298 |
抄録: | Thirty-eight spherules from the Antarctic ice sheet were analyzed using neutron activation analysis under two different conditions to investigate their origin. In almost all of these spherules, the contents of iron, cobalt, and manganese were determined to be 31% to 88%, 17 mg/kg to 810 mg/kg, and 0.017% to 7%, respectively. A detectable iridium content of 0.84 mg/kg was found in only one spherule, which was judged to be extraterrestrial in origin. A comparison of elemental compositions of the Antarctic spherules analyzed in this study with those of deep-sea sediment spherules and those of terrestrial materials revealed that most of the Antarctic spherules except for the sample in which iridium was detected could not be identified as extraterrestrial in origin. |
著作権等: | © 2016, Published by Elsevier Korea LLC on behalf of Korean Nuclear Society. This is an open access article under the CC BY-NC-ND license http://creativecommons.org/licenses/by-nc-nd/4.0/) |
URI: | http://hdl.handle.net/2433/217399 |
DOI(出版社版): | 10.1016/j.net.2016.02.004 |
出現コレクション: | 学術雑誌掲載論文等 |
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