Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta
We performed a petrological and geochemical study of an olivine diogenite, Northwest Africa (NWA) 5480. NWA 5480 is a crystalline stone, but shows a heterogeneous texture. Olivine aggregates and grains of olivine and chromite display resorption textures set in a crystalline pyroxene matrix. Large ol...
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ftarchimer:oai:archimer.ifremer.fr:75131 2023-05-15T18:22:21+02:00 Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta Yamaguchi, A. Barrat, Jean-alix Shirai, N. Ebihara, M. 2015-07 application/pdf https://archimer.ifremer.fr/doc/00639/75131/75519.pdf https://doi.org/10.1111/maps.12470 https://archimer.ifremer.fr/doc/00639/75131/ eng eng Wiley https://archimer.ifremer.fr/doc/00639/75131/75519.pdf doi:10.1111/maps.12470 https://archimer.ifremer.fr/doc/00639/75131/ info:eu-repo/semantics/openAccess restricted use Meteoritics & Planetary Science (1086-9379) (Wiley), 2015-07 , Vol. 50 , N. 7 , P. 1260-1270 text Publication info:eu-repo/semantics/article 2015 ftarchimer https://doi.org/10.1111/maps.12470 2021-09-23T20:35:32Z We performed a petrological and geochemical study of an olivine diogenite, Northwest Africa (NWA) 5480. NWA 5480 is a crystalline stone, but shows a heterogeneous texture. Olivine aggregates and grains of olivine and chromite display resorption textures set in a crystalline pyroxene matrix. Large olivine aggregates are penetrated by pyroxene matrix. Flow textures are observed near olivine aggregates. Olivine, chromite, and pyroxene show minor chemical zoning, implying relatively rapid cooling. NWA 5480 contains a significant amount of platinum group elements with chondritic relative proportions. All this evidence supports that NWA 5480 is an impact-melt breccia from a target composed of olivine and pyroxene-rich lithologies. Such impact melt would have formed by melting crustal materials, possibly during one of the impacts that formed the South Pole basins on Vesta. Article in Journal/Newspaper South pole Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) South Pole Meteoritics & Planetary Science 50 7 1260 1270 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
We performed a petrological and geochemical study of an olivine diogenite, Northwest Africa (NWA) 5480. NWA 5480 is a crystalline stone, but shows a heterogeneous texture. Olivine aggregates and grains of olivine and chromite display resorption textures set in a crystalline pyroxene matrix. Large olivine aggregates are penetrated by pyroxene matrix. Flow textures are observed near olivine aggregates. Olivine, chromite, and pyroxene show minor chemical zoning, implying relatively rapid cooling. NWA 5480 contains a significant amount of platinum group elements with chondritic relative proportions. All this evidence supports that NWA 5480 is an impact-melt breccia from a target composed of olivine and pyroxene-rich lithologies. Such impact melt would have formed by melting crustal materials, possibly during one of the impacts that formed the South Pole basins on Vesta. |
format |
Article in Journal/Newspaper |
author |
Yamaguchi, A. Barrat, Jean-alix Shirai, N. Ebihara, M. |
spellingShingle |
Yamaguchi, A. Barrat, Jean-alix Shirai, N. Ebihara, M. Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta |
author_facet |
Yamaguchi, A. Barrat, Jean-alix Shirai, N. Ebihara, M. |
author_sort |
Yamaguchi, A. |
title |
Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta |
title_short |
Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta |
title_full |
Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta |
title_fullStr |
Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta |
title_full_unstemmed |
Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta |
title_sort |
petrology and geochemistry of northwest africa 5480 diogenite and evidence for a basin-forming event on vesta |
publisher |
Wiley |
publishDate |
2015 |
url |
https://archimer.ifremer.fr/doc/00639/75131/75519.pdf https://doi.org/10.1111/maps.12470 https://archimer.ifremer.fr/doc/00639/75131/ |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Meteoritics & Planetary Science (1086-9379) (Wiley), 2015-07 , Vol. 50 , N. 7 , P. 1260-1270 |
op_relation |
https://archimer.ifremer.fr/doc/00639/75131/75519.pdf doi:10.1111/maps.12470 https://archimer.ifremer.fr/doc/00639/75131/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1111/maps.12470 |
container_title |
Meteoritics & Planetary Science |
container_volume |
50 |
container_issue |
7 |
container_start_page |
1260 |
op_container_end_page |
1270 |
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1766201746754895872 |