Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites
Abstract Ungrouped carbonaceous chondrites are not easily classified into one of the well‐established groups due to compositional/petrological differences and geochemical anomalies. Type 2 ungrouped carbonaceous chondrites represent a very small fraction of all carbonaceous chondrites. They can pote...
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crwiley:10.1111/maps.13893 2024-09-15T18:38:30+00:00 Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites Yesiltas, Mehmet Kebukawa, Yoko Glotch, Timothy D. Zolensky, Michael Fries, Marc Aysal, Namik Tukel, Fatma S. Johnson Space Center 2022 http://dx.doi.org/10.1111/maps.13893 https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.13893 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/maps.13893 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/maps.13893 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics & Planetary Science volume 57, issue 9, page 1665-1687 ISSN 1086-9379 1945-5100 journal-article 2022 crwiley https://doi.org/10.1111/maps.13893 2024-09-03T04:26:55Z Abstract Ungrouped carbonaceous chondrites are not easily classified into one of the well‐established groups due to compositional/petrological differences and geochemical anomalies. Type 2 ungrouped carbonaceous chondrites represent a very small fraction of all carbonaceous chondrites. They can potentially represent different aspects of asteroids and their regolith material. By conducting a multitechnique investigation, we show that Queen Alexandra Range (QUE) 99038 and Elephant Moraine (EET) 83226 do not resemble type 2 carbonaceous chondrites. QUE 99038 exhibits coarse‐grained matrix, Fe‐rich rims on olivines, and an apparent lack of tochilinite, suggesting that QUE 99038 has been metamorphosed. Its polyaromatic organic matter structures closely resemble oxidized CV3 chondrites. EET 83226 exhibits a clastic texture with high porosity and shows similarities to CO3 chondrites. It consists of numerous large chondrules with fine‐grained rims that are often fragmented and discontinuous and set within matrix, suggesting a formation mechanism for the rims in a regolith environment. The kind of processes that can result in such chemical compositions as in QUE 99038 and EET 83226 is currently not fully known and clearly presents a conundrum. Tarda is a highly friable carbonaceous chondrite with close resemblance to Tagish Lake (ungrouped C2 chondrite). It comprises different types of chondrules (some with Fe‐rich rims), framboid magnetite, sulfides, carbonates, and phyllosilicate‐ and carbon‐rich matrix, and is consistent with being an ungrouped C2 chondrite. Article in Journal/Newspaper Tagish Wiley Online Library Meteoritics & Planetary Science 57 9 1665 1687 |
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Abstract Ungrouped carbonaceous chondrites are not easily classified into one of the well‐established groups due to compositional/petrological differences and geochemical anomalies. Type 2 ungrouped carbonaceous chondrites represent a very small fraction of all carbonaceous chondrites. They can potentially represent different aspects of asteroids and their regolith material. By conducting a multitechnique investigation, we show that Queen Alexandra Range (QUE) 99038 and Elephant Moraine (EET) 83226 do not resemble type 2 carbonaceous chondrites. QUE 99038 exhibits coarse‐grained matrix, Fe‐rich rims on olivines, and an apparent lack of tochilinite, suggesting that QUE 99038 has been metamorphosed. Its polyaromatic organic matter structures closely resemble oxidized CV3 chondrites. EET 83226 exhibits a clastic texture with high porosity and shows similarities to CO3 chondrites. It consists of numerous large chondrules with fine‐grained rims that are often fragmented and discontinuous and set within matrix, suggesting a formation mechanism for the rims in a regolith environment. The kind of processes that can result in such chemical compositions as in QUE 99038 and EET 83226 is currently not fully known and clearly presents a conundrum. Tarda is a highly friable carbonaceous chondrite with close resemblance to Tagish Lake (ungrouped C2 chondrite). It comprises different types of chondrules (some with Fe‐rich rims), framboid magnetite, sulfides, carbonates, and phyllosilicate‐ and carbon‐rich matrix, and is consistent with being an ungrouped C2 chondrite. |
author2 |
Johnson Space Center |
format |
Article in Journal/Newspaper |
author |
Yesiltas, Mehmet Kebukawa, Yoko Glotch, Timothy D. Zolensky, Michael Fries, Marc Aysal, Namik Tukel, Fatma S. |
spellingShingle |
Yesiltas, Mehmet Kebukawa, Yoko Glotch, Timothy D. Zolensky, Michael Fries, Marc Aysal, Namik Tukel, Fatma S. Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites |
author_facet |
Yesiltas, Mehmet Kebukawa, Yoko Glotch, Timothy D. Zolensky, Michael Fries, Marc Aysal, Namik Tukel, Fatma S. |
author_sort |
Yesiltas, Mehmet |
title |
Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites |
title_short |
Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites |
title_full |
Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites |
title_fullStr |
Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites |
title_full_unstemmed |
Compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites |
title_sort |
compositional and spectroscopic investigation of three ungrouped carbonaceous chondrites |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/maps.13893 https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.13893 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/maps.13893 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/maps.13893 |
genre |
Tagish |
genre_facet |
Tagish |
op_source |
Meteoritics & Planetary Science volume 57, issue 9, page 1665-1687 ISSN 1086-9379 1945-5100 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/maps.13893 |
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Meteoritics & Planetary Science |
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57 |
container_issue |
9 |
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1665 |
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1687 |
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1810482901669642240 |