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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fttriple:oai:gotriple.eu:10670/1.4wj0uz 2023-05-15T18:22:20+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. https://doi.org/10.1111/maps.12470 https://archimer.ifremer.fr/doc/00639/75131/75519.pdf https://archimer.ifremer.fr/doc/00639/75131/ en eng Wiley doi:10.1111/maps.12470 10670/1.4wj0uz https://archimer.ifremer.fr/doc/00639/75131/75519.pdf https://archimer.ifremer.fr/doc/00639/75131/ other Archimer, archive institutionnelle de l'Ifremer Meteoritics & Planetary Science (1086-9379) (Wiley), 2015-07 , Vol. 50 , N. 7 , P. 1260-1270 geo art Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1111/maps.12470 2023-01-22T18:31:53Z 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. Text South pole Unknown South Pole Meteoritics & Planetary Science 50 7 1260 1270 |
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geo art 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 |
topic_facet |
geo art |
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 |
Text |
author |
Yamaguchi, A. Barrat, Jean-alix Shirai, N. Ebihara, M. |
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 |
url |
https://doi.org/10.1111/maps.12470 https://archimer.ifremer.fr/doc/00639/75131/75519.pdf https://archimer.ifremer.fr/doc/00639/75131/ |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Archimer, archive institutionnelle de l'Ifremer Meteoritics & Planetary Science (1086-9379) (Wiley), 2015-07 , Vol. 50 , N. 7 , P. 1260-1270 |
op_relation |
doi:10.1111/maps.12470 10670/1.4wj0uz https://archimer.ifremer.fr/doc/00639/75131/75519.pdf https://archimer.ifremer.fr/doc/00639/75131/ |
op_rights |
other |
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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1766201729191247872 |