Cosmogenic radionuclides and noble gases in Antarctic H chondrites with high and normal natural thermoluminescence levels
Abstract— We report noble gas data for 37 H chondrites collected from the Allan Hills by EUROMET in the 1988–1989 field season. Among these are 16 specimens with high levels (>100 krad) of natural thermoluminescence (NTL), originally interpreted as signaling their derivation from a single meteoro...
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crwiley:10.1111/j.1945-5100.2000.tb01455.x 2024-06-23T07:46:46+00:00 Cosmogenic radionuclides and noble gases in Antarctic H chondrites with high and normal natural thermoluminescence levels MOKOS, Jennifer L. FRANKE, Luitgard SCHERER, Peter SCHULTZ, Ludolf LIPSCHUTZ, Michael E. 2000 http://dx.doi.org/10.1111/j.1945-5100.2000.tb01455.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.2000.tb01455.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.2000.tb01455.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics & Planetary Science volume 35, issue 4, page 713-721 ISSN 1086-9379 1945-5100 journal-article 2000 crwiley https://doi.org/10.1111/j.1945-5100.2000.tb01455.x 2024-06-04T06:37:56Z Abstract— We report noble gas data for 37 H chondrites collected from the Allan Hills by EUROMET in the 1988–1989 field season. Among these are 16 specimens with high levels (>100 krad) of natural thermoluminescence (NTL), originally interpreted as signaling their derivation from a single meteoroid with an orbit that became Earth‐crossin‐100 ka ago. One of these 16 is an H3 chondrite with a cosmic‐ray exposure age of ∼33 Ma and clearly represents a separate fall. The other 15 H4–6 chondrites derive from three separate meteoroids, each of which is represented by a five or six member group. These groups have mean exposure ages of 3.7, 4.1, and 6.6 Ma: the middle‐group members all contain solar Ne. The two younger groups also seem to each include a few H chondrites with normal NTL levels. Measurements of cosmogenic 10 Be (1.5 Ma), 26 AI (710 ka), and 36 CI (301 ka) in 14 of the high‐NTL chondrites indicate that all reflect a simple irradiation history. In contrast, many of a different (38 member) randomly selected suite of Antarctic H chondrites seem to have different cosmic‐ray irradiation histories. The 3.7 and 6.6 Ma groups from the 37 member Allan Hills suite come from about 5–30 and about 5–10 cm depths in 80–125 and 60–125 cm radius meteoroids, respectively. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Allan Hills ENVELOPE(159.667,159.667,-76.717,-76.717) Antarctic Meteoritics & Planetary Science 35 4 713 721 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract— We report noble gas data for 37 H chondrites collected from the Allan Hills by EUROMET in the 1988–1989 field season. Among these are 16 specimens with high levels (>100 krad) of natural thermoluminescence (NTL), originally interpreted as signaling their derivation from a single meteoroid with an orbit that became Earth‐crossin‐100 ka ago. One of these 16 is an H3 chondrite with a cosmic‐ray exposure age of ∼33 Ma and clearly represents a separate fall. The other 15 H4–6 chondrites derive from three separate meteoroids, each of which is represented by a five or six member group. These groups have mean exposure ages of 3.7, 4.1, and 6.6 Ma: the middle‐group members all contain solar Ne. The two younger groups also seem to each include a few H chondrites with normal NTL levels. Measurements of cosmogenic 10 Be (1.5 Ma), 26 AI (710 ka), and 36 CI (301 ka) in 14 of the high‐NTL chondrites indicate that all reflect a simple irradiation history. In contrast, many of a different (38 member) randomly selected suite of Antarctic H chondrites seem to have different cosmic‐ray irradiation histories. The 3.7 and 6.6 Ma groups from the 37 member Allan Hills suite come from about 5–30 and about 5–10 cm depths in 80–125 and 60–125 cm radius meteoroids, respectively. |
format |
Article in Journal/Newspaper |
author |
MOKOS, Jennifer L. FRANKE, Luitgard SCHERER, Peter SCHULTZ, Ludolf LIPSCHUTZ, Michael E. |
spellingShingle |
MOKOS, Jennifer L. FRANKE, Luitgard SCHERER, Peter SCHULTZ, Ludolf LIPSCHUTZ, Michael E. Cosmogenic radionuclides and noble gases in Antarctic H chondrites with high and normal natural thermoluminescence levels |
author_facet |
MOKOS, Jennifer L. FRANKE, Luitgard SCHERER, Peter SCHULTZ, Ludolf LIPSCHUTZ, Michael E. |
author_sort |
MOKOS, Jennifer L. |
title |
Cosmogenic radionuclides and noble gases in Antarctic H chondrites with high and normal natural thermoluminescence levels |
title_short |
Cosmogenic radionuclides and noble gases in Antarctic H chondrites with high and normal natural thermoluminescence levels |
title_full |
Cosmogenic radionuclides and noble gases in Antarctic H chondrites with high and normal natural thermoluminescence levels |
title_fullStr |
Cosmogenic radionuclides and noble gases in Antarctic H chondrites with high and normal natural thermoluminescence levels |
title_full_unstemmed |
Cosmogenic radionuclides and noble gases in Antarctic H chondrites with high and normal natural thermoluminescence levels |
title_sort |
cosmogenic radionuclides and noble gases in antarctic h chondrites with high and normal natural thermoluminescence levels |
publisher |
Wiley |
publishDate |
2000 |
url |
http://dx.doi.org/10.1111/j.1945-5100.2000.tb01455.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.2000.tb01455.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.2000.tb01455.x |
long_lat |
ENVELOPE(159.667,159.667,-76.717,-76.717) |
geographic |
Allan Hills Antarctic |
geographic_facet |
Allan Hills Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Meteoritics & Planetary Science volume 35, issue 4, page 713-721 ISSN 1086-9379 1945-5100 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1945-5100.2000.tb01455.x |
container_title |
Meteoritics & Planetary Science |
container_volume |
35 |
container_issue |
4 |
container_start_page |
713 |
op_container_end_page |
721 |
_version_ |
1802648042143219712 |