Origin of Spherule Samples Recovered from Antarctic Ice Sheet-Terrestrial or Extraterrestrial?
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...
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ftkyotouniv:oai:repository.kulib.kyoto-u.ac.jp:2433/217399 2023-05-15T13:35:46+02:00 Origin of Spherule Samples Recovered from Antarctic Ice Sheet-Terrestrial or Extraterrestrial? Sekimoto, Shun Kobayashi, Takayuki Takamiya, Koichi Ebihara, Mitsuru Shibata, Seiichi 関本, 俊 髙宮, 幸一 2016-04-01 http://hdl.handle.net/2433/217399 eng eng Elsevier Korea LLC 10.1016/j.net.2016.02.004 2234-358X http://hdl.handle.net/2433/217399 Nuclear Engineering and Technology 48 2 293 298 © 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/) CC-BY-NC-ND Antarctic Extraterrestrial Iridium Neutron Activation Analysis Spherule Journal Article 2016 ftkyotouniv 2017-10-28T22:59:37Z 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. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Kyoto University Research Information Repository (KURENAI) Antarctic The Antarctic |
institution |
Open Polar |
collection |
Kyoto University Research Information Repository (KURENAI) |
op_collection_id |
ftkyotouniv |
language |
English |
topic |
Antarctic Extraterrestrial Iridium Neutron Activation Analysis Spherule |
spellingShingle |
Antarctic Extraterrestrial Iridium Neutron Activation Analysis Spherule Sekimoto, Shun Kobayashi, Takayuki Takamiya, Koichi Ebihara, Mitsuru Shibata, Seiichi Origin of Spherule Samples Recovered from Antarctic Ice Sheet-Terrestrial or Extraterrestrial? |
topic_facet |
Antarctic Extraterrestrial Iridium Neutron Activation Analysis Spherule |
description |
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. |
author2 |
関本, 俊 髙宮, 幸一 |
format |
Article in Journal/Newspaper |
author |
Sekimoto, Shun Kobayashi, Takayuki Takamiya, Koichi Ebihara, Mitsuru Shibata, Seiichi |
author_facet |
Sekimoto, Shun Kobayashi, Takayuki Takamiya, Koichi Ebihara, Mitsuru Shibata, Seiichi |
author_sort |
Sekimoto, Shun |
title |
Origin of Spherule Samples Recovered from Antarctic Ice Sheet-Terrestrial or Extraterrestrial? |
title_short |
Origin of Spherule Samples Recovered from Antarctic Ice Sheet-Terrestrial or Extraterrestrial? |
title_full |
Origin of Spherule Samples Recovered from Antarctic Ice Sheet-Terrestrial or Extraterrestrial? |
title_fullStr |
Origin of Spherule Samples Recovered from Antarctic Ice Sheet-Terrestrial or Extraterrestrial? |
title_full_unstemmed |
Origin of Spherule Samples Recovered from Antarctic Ice Sheet-Terrestrial or Extraterrestrial? |
title_sort |
origin of spherule samples recovered from antarctic ice sheet-terrestrial or extraterrestrial? |
publisher |
Elsevier Korea LLC |
publishDate |
2016 |
url |
http://hdl.handle.net/2433/217399 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
10.1016/j.net.2016.02.004 2234-358X http://hdl.handle.net/2433/217399 Nuclear Engineering and Technology 48 2 293 298 |
op_rights |
© 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/) |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766070020458151936 |