Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta
International audience 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 py...
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-01184623 https://doi.org/10.1111/maps.12470 |
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ftccsdartic:oai:HAL:insu-01184623v1 2023-05-15T18:22:25+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. Department of Polar Science Graduate University for Advanced Sciences Department of Ocean Floor Geoscience, Ocean Research Institute The University of Tokyo (UTokyo) Domaines Océaniques (LDO) Centre National de la Recherche Scientifique (CNRS)-Institut d'écologie et environnement-Observatoire des Sciences de l'Univers-Université de Brest (UBO)-Institut national des sciences de l'Univers (INSU - CNRS) Department of Chemistry Tokyo Metropolitan University Tokyo (TMU) NIPR Research Project funds, KP6 2015-07 https://hal-insu.archives-ouvertes.fr/insu-01184623 https://doi.org/10.1111/maps.12470 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/maps.12470 insu-01184623 https://hal-insu.archives-ouvertes.fr/insu-01184623 doi:10.1111/maps.12470 ISSN: 1086-9379 EISSN: 1945-5100 Meteoritics and Planetary Science https://hal-insu.archives-ouvertes.fr/insu-01184623 Meteoritics and Planetary Science, Wiley, 2015, 50 (7), pp.1260-1270. ⟨10.1111/maps.12470⟩ [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.1111/maps.12470 2021-10-24T11:43:27Z International audience 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) South Pole Meteoritics & Planetary Science 50 7 1260 1270 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology |
spellingShingle |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology 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 |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology |
description |
International audience 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. |
author2 |
Department of Polar Science Graduate University for Advanced Sciences Department of Ocean Floor Geoscience, Ocean Research Institute The University of Tokyo (UTokyo) Domaines Océaniques (LDO) Centre National de la Recherche Scientifique (CNRS)-Institut d'écologie et environnement-Observatoire des Sciences de l'Univers-Université de Brest (UBO)-Institut national des sciences de l'Univers (INSU - CNRS) Department of Chemistry Tokyo Metropolitan University Tokyo (TMU) NIPR Research Project funds, KP6 |
format |
Article in Journal/Newspaper |
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 |
HAL CCSD |
publishDate |
2015 |
url |
https://hal-insu.archives-ouvertes.fr/insu-01184623 https://doi.org/10.1111/maps.12470 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
ISSN: 1086-9379 EISSN: 1945-5100 Meteoritics and Planetary Science https://hal-insu.archives-ouvertes.fr/insu-01184623 Meteoritics and Planetary Science, Wiley, 2015, 50 (7), pp.1260-1270. ⟨10.1111/maps.12470⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/maps.12470 insu-01184623 https://hal-insu.archives-ouvertes.fr/insu-01184623 doi:10.1111/maps.12470 |
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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1766201832064942080 |