Signatures of the Martian Atmosphere in Glass of the Zagami Meteorite
Isotopic signatures of nitrogen, argon, and xenon have been determined in separated millimeter-sized pockets of shock-melted glass in a recently identified lithology of the meteorite Zagami, a shergottite. The ratio of nitrogen-15 to nitrogen-14, which is at least 282 per mil larger than the terrest...
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1995
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craaas:10.1126/science.7701319 2024-09-15T17:48:48+00:00 Signatures of the Martian Atmosphere in Glass of the Zagami Meteorite Marti, K. Kim, J. S. Thakur, A. N. McCoy, T. J. Keil, K. 1995 http://dx.doi.org/10.1126/science.7701319 https://www.science.org/doi/pdf/10.1126/science.7701319 en eng American Association for the Advancement of Science (AAAS) Science volume 267, issue 5206, page 1981-1984 ISSN 0036-8075 1095-9203 journal-article 1995 craaas https://doi.org/10.1126/science.7701319 2024-08-22T04:01:09Z Isotopic signatures of nitrogen, argon, and xenon have been determined in separated millimeter-sized pockets of shock-melted glass in a recently identified lithology of the meteorite Zagami, a shergottite. The ratio of nitrogen-15 to nitrogen-14, which is at least 282 per mil larger than the terrestrial value, the ratio of xenon-129 to xenon-132 = 2.40, and the argon isotopic abundances match the signatures previously observed in the glassy lithology of the Antarctic shergottite EETA 79001. These results show that the signatures in EETA 79001 are not unique but characterize the trapped gas component in shock-melted glass of shergottites. The isotopic and elemental ratios of nitrogen, argon, and xenon closely resemble the Viking spacecraft data for the martian atmosphere and provide compelling evidence for a martian origin of the two shergottites and, by extension, of the meteorites in the shergottites-nakhlites-chassignites (SNC) group. Article in Journal/Newspaper Antarc* Antarctic AAAS Resource Center (American Association for the Advancement of Science) Science 267 5206 1981 1984 |
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Open Polar |
collection |
AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Isotopic signatures of nitrogen, argon, and xenon have been determined in separated millimeter-sized pockets of shock-melted glass in a recently identified lithology of the meteorite Zagami, a shergottite. The ratio of nitrogen-15 to nitrogen-14, which is at least 282 per mil larger than the terrestrial value, the ratio of xenon-129 to xenon-132 = 2.40, and the argon isotopic abundances match the signatures previously observed in the glassy lithology of the Antarctic shergottite EETA 79001. These results show that the signatures in EETA 79001 are not unique but characterize the trapped gas component in shock-melted glass of shergottites. The isotopic and elemental ratios of nitrogen, argon, and xenon closely resemble the Viking spacecraft data for the martian atmosphere and provide compelling evidence for a martian origin of the two shergottites and, by extension, of the meteorites in the shergottites-nakhlites-chassignites (SNC) group. |
format |
Article in Journal/Newspaper |
author |
Marti, K. Kim, J. S. Thakur, A. N. McCoy, T. J. Keil, K. |
spellingShingle |
Marti, K. Kim, J. S. Thakur, A. N. McCoy, T. J. Keil, K. Signatures of the Martian Atmosphere in Glass of the Zagami Meteorite |
author_facet |
Marti, K. Kim, J. S. Thakur, A. N. McCoy, T. J. Keil, K. |
author_sort |
Marti, K. |
title |
Signatures of the Martian Atmosphere in Glass of the Zagami Meteorite |
title_short |
Signatures of the Martian Atmosphere in Glass of the Zagami Meteorite |
title_full |
Signatures of the Martian Atmosphere in Glass of the Zagami Meteorite |
title_fullStr |
Signatures of the Martian Atmosphere in Glass of the Zagami Meteorite |
title_full_unstemmed |
Signatures of the Martian Atmosphere in Glass of the Zagami Meteorite |
title_sort |
signatures of the martian atmosphere in glass of the zagami meteorite |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1126/science.7701319 https://www.science.org/doi/pdf/10.1126/science.7701319 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Science volume 267, issue 5206, page 1981-1984 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.7701319 |
container_title |
Science |
container_volume |
267 |
container_issue |
5206 |
container_start_page |
1981 |
op_container_end_page |
1984 |
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1810290330608599040 |