An extraction system to measure carbon-14 terrestrial ages of meteorites with a Tandetron AMS at Nagoya University.
We have constructed a system to extract carbon from meteorites using a vacuum-tight RF melting method in order to study radiocarbon activities in meteorites. The extraction system was examined using iron standards of known carbon content. The carbon extraction efficiencies and (super 14) C ages of t...
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Radiocarbon
2001
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/3962 2023-05-15T14:02:46+02:00 An extraction system to measure carbon-14 terrestrial ages of meteorites with a Tandetron AMS at Nagoya University. Minami, Masayo Nakamura, Toshio 2001-01-01 application/pdf https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3962 eng eng Radiocarbon https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3962/3387 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3962 Radiocarbon; Vol 43, No 2A (2001); 263-269 0033-8222 Allan Hills Meteorites;ALHA 77294;Allan Hills;ice fields;Victoria Land;Y 75102;Yamato Meteorites;Antarctica;meteorites;upper Quaternary;accuracy;measurement;accelerator mass spectroscopy;mass spectroscopy;spectroscopy;exposure age;Pleistocene;upper Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;absolute age info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2001 ftunivarizonaojs 2020-11-14T17:53:00Z We have constructed a system to extract carbon from meteorites using a vacuum-tight RF melting method in order to study radiocarbon activities in meteorites. The extraction system was examined using iron standards of known carbon content. The carbon extraction efficiencies and (super 14) C ages of the iron standards by this method were compared with the results obtained previously by our older melting system and a wet oxidation method. Higher collection efficiencies of about 90% for the iron samples of relatively high carbon content were achieved by the new system. The efficiency of extracting a small amount of carbon is also near 90% after improving the extraction procedure. The (super 14) C ages of the iron standards were compared to the ages by the wet method. The results indicate that contamination by modern carbon is negligible in the system. Furthermore, terrestrial (super 14) C ages of two Antarctic meteorites, Y-75102 and ALH-77294, from the Yamato and Allan Hills ice fields, respectively, were determined. The age of Y-75102 is estimated 4.0+ or -1.0 ka, and the age of ALH-77294 is 19.5+ or -1.2 ka. The (super 14) C ages on the meteorites roughly agree with the literature value. However, further study is needed in improvement on reducing a background value and of complete fusion of a meteorite in the extraction system. Article in Journal/Newspaper Antarc* Antarctic Antarctica Victoria Land Journals at the University of Arizona Allan Hills ENVELOPE(159.667,159.667,-76.717,-76.717) Antarctic Victoria Land Yamato ENVELOPE(35.583,35.583,-71.417,-71.417) |
institution |
Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
topic |
Allan Hills Meteorites;ALHA 77294;Allan Hills;ice fields;Victoria Land;Y 75102;Yamato Meteorites;Antarctica;meteorites;upper Quaternary;accuracy;measurement;accelerator mass spectroscopy;mass spectroscopy;spectroscopy;exposure age;Pleistocene;upper Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;absolute age |
spellingShingle |
Allan Hills Meteorites;ALHA 77294;Allan Hills;ice fields;Victoria Land;Y 75102;Yamato Meteorites;Antarctica;meteorites;upper Quaternary;accuracy;measurement;accelerator mass spectroscopy;mass spectroscopy;spectroscopy;exposure age;Pleistocene;upper Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;absolute age Minami, Masayo Nakamura, Toshio An extraction system to measure carbon-14 terrestrial ages of meteorites with a Tandetron AMS at Nagoya University. |
topic_facet |
Allan Hills Meteorites;ALHA 77294;Allan Hills;ice fields;Victoria Land;Y 75102;Yamato Meteorites;Antarctica;meteorites;upper Quaternary;accuracy;measurement;accelerator mass spectroscopy;mass spectroscopy;spectroscopy;exposure age;Pleistocene;upper Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;absolute age |
description |
We have constructed a system to extract carbon from meteorites using a vacuum-tight RF melting method in order to study radiocarbon activities in meteorites. The extraction system was examined using iron standards of known carbon content. The carbon extraction efficiencies and (super 14) C ages of the iron standards by this method were compared with the results obtained previously by our older melting system and a wet oxidation method. Higher collection efficiencies of about 90% for the iron samples of relatively high carbon content were achieved by the new system. The efficiency of extracting a small amount of carbon is also near 90% after improving the extraction procedure. The (super 14) C ages of the iron standards were compared to the ages by the wet method. The results indicate that contamination by modern carbon is negligible in the system. Furthermore, terrestrial (super 14) C ages of two Antarctic meteorites, Y-75102 and ALH-77294, from the Yamato and Allan Hills ice fields, respectively, were determined. The age of Y-75102 is estimated 4.0+ or -1.0 ka, and the age of ALH-77294 is 19.5+ or -1.2 ka. The (super 14) C ages on the meteorites roughly agree with the literature value. However, further study is needed in improvement on reducing a background value and of complete fusion of a meteorite in the extraction system. |
format |
Article in Journal/Newspaper |
author |
Minami, Masayo Nakamura, Toshio |
author_facet |
Minami, Masayo Nakamura, Toshio |
author_sort |
Minami, Masayo |
title |
An extraction system to measure carbon-14 terrestrial ages of meteorites with a Tandetron AMS at Nagoya University. |
title_short |
An extraction system to measure carbon-14 terrestrial ages of meteorites with a Tandetron AMS at Nagoya University. |
title_full |
An extraction system to measure carbon-14 terrestrial ages of meteorites with a Tandetron AMS at Nagoya University. |
title_fullStr |
An extraction system to measure carbon-14 terrestrial ages of meteorites with a Tandetron AMS at Nagoya University. |
title_full_unstemmed |
An extraction system to measure carbon-14 terrestrial ages of meteorites with a Tandetron AMS at Nagoya University. |
title_sort |
extraction system to measure carbon-14 terrestrial ages of meteorites with a tandetron ams at nagoya university. |
publisher |
Radiocarbon |
publishDate |
2001 |
url |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3962 |
long_lat |
ENVELOPE(159.667,159.667,-76.717,-76.717) ENVELOPE(35.583,35.583,-71.417,-71.417) |
geographic |
Allan Hills Antarctic Victoria Land Yamato |
geographic_facet |
Allan Hills Antarctic Victoria Land Yamato |
genre |
Antarc* Antarctic Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Victoria Land |
op_source |
Radiocarbon; Vol 43, No 2A (2001); 263-269 0033-8222 |
op_relation |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3962/3387 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3962 |
_version_ |
1766273178645037056 |