Fine‐grained rims in the Allan Hills 81002 and Lewis Cliff 90500 CM2 meteorites: Their origin and modification
Abstract— Antarctic CM meteorites Allan Hills (ALH) 81002 and Lewis Cliff (LEW) 90500 contain abundant fine‐grained rims (FGRs) that surround a variety of coarse‐grained objects. FGRs from both meteorites have similar compositions and petrographic features, independent of their enclosed objects. The...
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crwiley:10.1111/j.1945-5100.2002.tb01106.x 2024-06-23T07:46:07+00:00 Fine‐grained rims in the Allan Hills 81002 and Lewis Cliff 90500 CM2 meteorites: Their origin and modification HUA, Xin WANG, Jianhua BUSECK, Peter R. 2002 http://dx.doi.org/10.1111/j.1945-5100.2002.tb01106.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.2002.tb01106.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.2002.tb01106.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics & Planetary Science volume 37, issue 2, page 229-244 ISSN 1086-9379 1945-5100 journal-article 2002 crwiley https://doi.org/10.1111/j.1945-5100.2002.tb01106.x 2024-05-31T08:11:24Z Abstract— Antarctic CM meteorites Allan Hills (ALH) 81002 and Lewis Cliff (LEW) 90500 contain abundant fine‐grained rims (FGRs) that surround a variety of coarse‐grained objects. FGRs from both meteorites have similar compositions and petrographic features, independent of their enclosed objects. The FGRs are chemically homogeneous at the 10 μm scale for major and minor elements and at the 25 μm scale for trace elements. They display accretionary features and contain large amounts of volatiles, presumably water. They are depleted in Ca, Mn, and S but enriched in P. All FGRs show a slightly fractionated rare earth element (REE) pattern, with enrichments of Gd and Yb and depletion of Er. Gd is twice as abundant as Er. Our results indicate that those FGRs are not genetically related to their enclosed cores. They were sampled from a reservoir of homogeneously mixed dust, prior to accretion to their parent body. The rim materials subsequently experienced aqueous alteration under identical conditions. Based on their mineral, textural, and especially chemical similarities, we conclude that ALH 81002 and LEW 90500 likely have a similar or identical source. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Allan Hills ENVELOPE(159.667,159.667,-76.717,-76.717) Antarctic Lewis Cliff ENVELOPE(161.083,161.083,-84.283,-84.283) Meteoritics & Planetary Science 37 2 229 244 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract— Antarctic CM meteorites Allan Hills (ALH) 81002 and Lewis Cliff (LEW) 90500 contain abundant fine‐grained rims (FGRs) that surround a variety of coarse‐grained objects. FGRs from both meteorites have similar compositions and petrographic features, independent of their enclosed objects. The FGRs are chemically homogeneous at the 10 μm scale for major and minor elements and at the 25 μm scale for trace elements. They display accretionary features and contain large amounts of volatiles, presumably water. They are depleted in Ca, Mn, and S but enriched in P. All FGRs show a slightly fractionated rare earth element (REE) pattern, with enrichments of Gd and Yb and depletion of Er. Gd is twice as abundant as Er. Our results indicate that those FGRs are not genetically related to their enclosed cores. They were sampled from a reservoir of homogeneously mixed dust, prior to accretion to their parent body. The rim materials subsequently experienced aqueous alteration under identical conditions. Based on their mineral, textural, and especially chemical similarities, we conclude that ALH 81002 and LEW 90500 likely have a similar or identical source. |
format |
Article in Journal/Newspaper |
author |
HUA, Xin WANG, Jianhua BUSECK, Peter R. |
spellingShingle |
HUA, Xin WANG, Jianhua BUSECK, Peter R. Fine‐grained rims in the Allan Hills 81002 and Lewis Cliff 90500 CM2 meteorites: Their origin and modification |
author_facet |
HUA, Xin WANG, Jianhua BUSECK, Peter R. |
author_sort |
HUA, Xin |
title |
Fine‐grained rims in the Allan Hills 81002 and Lewis Cliff 90500 CM2 meteorites: Their origin and modification |
title_short |
Fine‐grained rims in the Allan Hills 81002 and Lewis Cliff 90500 CM2 meteorites: Their origin and modification |
title_full |
Fine‐grained rims in the Allan Hills 81002 and Lewis Cliff 90500 CM2 meteorites: Their origin and modification |
title_fullStr |
Fine‐grained rims in the Allan Hills 81002 and Lewis Cliff 90500 CM2 meteorites: Their origin and modification |
title_full_unstemmed |
Fine‐grained rims in the Allan Hills 81002 and Lewis Cliff 90500 CM2 meteorites: Their origin and modification |
title_sort |
fine‐grained rims in the allan hills 81002 and lewis cliff 90500 cm2 meteorites: their origin and modification |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1111/j.1945-5100.2002.tb01106.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.2002.tb01106.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.2002.tb01106.x |
long_lat |
ENVELOPE(159.667,159.667,-76.717,-76.717) ENVELOPE(161.083,161.083,-84.283,-84.283) |
geographic |
Allan Hills Antarctic Lewis Cliff |
geographic_facet |
Allan Hills Antarctic Lewis Cliff |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Meteoritics & Planetary Science volume 37, issue 2, page 229-244 ISSN 1086-9379 1945-5100 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1945-5100.2002.tb01106.x |
container_title |
Meteoritics & Planetary Science |
container_volume |
37 |
container_issue |
2 |
container_start_page |
229 |
op_container_end_page |
244 |
_version_ |
1802644072468316160 |