Mineralogy of five new Antarctic ureilites, LEW86216, LEW85328, Y-791839, Y-75154, Y-8448, and the origin of their chemical variations of pyroxene
Mineralogical studies of mafic silicates in heavily shocked ureilites, LEW86216,Y-75154,Y-791839,and moderately shocked ureilite LEW85328 were performed to reveal the chemical variations and textures produced by shock events on the ureilite parent body. Y-8448 is one of common ureilites, but such ur...
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Mineralogical Institute, Faculty of Science, University of Tokyo/ Mineralogical Institute, Faculty of Science, University of Tokyo
1990
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ftnipr:oai:nipr.repo.nii.ac.jp:00004514 2023-05-15T13:49:01+02:00 Mineralogy of five new Antarctic ureilites, LEW86216, LEW85328, Y-791839, Y-75154, Y-8448, and the origin of their chemical variations of pyroxene Saito,Jun Takeda,Hiroshi 1990-10 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4514 http://id.nii.ac.jp/1291/00004514/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4514&item_no=1&attribute_id=18&file_no=1 en eng Mineralogical Institute, Faculty of Science, University of Tokyo/ Mineralogical Institute, Faculty of Science, University of Tokyo National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4514 http://id.nii.ac.jp/1291/00004514/ AA10784627 Proceedings of the NIPR Symposium on Antarctic Meteorites, 3, 132-146(1990-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4514&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1990 ftnipr 2023-01-28T20:04:07Z Mineralogical studies of mafic silicates in heavily shocked ureilites, LEW86216,Y-75154,Y-791839,and moderately shocked ureilite LEW85328 were performed to reveal the chemical variations and textures produced by shock events on the ureilite parent body. Y-8448 is one of common ureilites, but such ureilites are found in relatively small numbers in Antarctica. Olivines in Y-75154 and LEW86216 show granoblastic textures and the carbonaceous veins are disrupted. Their pyroxenes show chemical variations toward enstatite. They are among the most heavily shocked ureilites. Grain rims of Y-791839 and LEW85328 show chemical variations due to shock. The chemical trends of all these heavily shocked ureilites cover the entire range of known individual ureilites. Shock effects of these ureilites are interpreted to have been produced during the break-up of their parent body. Their chemical variations may be applied to study of the chemical differentiation by the planetesimal-scale collision in the earliest stage of ureilite formation. Report Antarc* Antarctic Antarctica National Institute of Polar Research Repository, Japan Antarctic |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Mineralogical studies of mafic silicates in heavily shocked ureilites, LEW86216,Y-75154,Y-791839,and moderately shocked ureilite LEW85328 were performed to reveal the chemical variations and textures produced by shock events on the ureilite parent body. Y-8448 is one of common ureilites, but such ureilites are found in relatively small numbers in Antarctica. Olivines in Y-75154 and LEW86216 show granoblastic textures and the carbonaceous veins are disrupted. Their pyroxenes show chemical variations toward enstatite. They are among the most heavily shocked ureilites. Grain rims of Y-791839 and LEW85328 show chemical variations due to shock. The chemical trends of all these heavily shocked ureilites cover the entire range of known individual ureilites. Shock effects of these ureilites are interpreted to have been produced during the break-up of their parent body. Their chemical variations may be applied to study of the chemical differentiation by the planetesimal-scale collision in the earliest stage of ureilite formation. |
format |
Report |
author |
Saito,Jun Takeda,Hiroshi |
spellingShingle |
Saito,Jun Takeda,Hiroshi Mineralogy of five new Antarctic ureilites, LEW86216, LEW85328, Y-791839, Y-75154, Y-8448, and the origin of their chemical variations of pyroxene |
author_facet |
Saito,Jun Takeda,Hiroshi |
author_sort |
Saito,Jun |
title |
Mineralogy of five new Antarctic ureilites, LEW86216, LEW85328, Y-791839, Y-75154, Y-8448, and the origin of their chemical variations of pyroxene |
title_short |
Mineralogy of five new Antarctic ureilites, LEW86216, LEW85328, Y-791839, Y-75154, Y-8448, and the origin of their chemical variations of pyroxene |
title_full |
Mineralogy of five new Antarctic ureilites, LEW86216, LEW85328, Y-791839, Y-75154, Y-8448, and the origin of their chemical variations of pyroxene |
title_fullStr |
Mineralogy of five new Antarctic ureilites, LEW86216, LEW85328, Y-791839, Y-75154, Y-8448, and the origin of their chemical variations of pyroxene |
title_full_unstemmed |
Mineralogy of five new Antarctic ureilites, LEW86216, LEW85328, Y-791839, Y-75154, Y-8448, and the origin of their chemical variations of pyroxene |
title_sort |
mineralogy of five new antarctic ureilites, lew86216, lew85328, y-791839, y-75154, y-8448, and the origin of their chemical variations of pyroxene |
publisher |
Mineralogical Institute, Faculty of Science, University of Tokyo/ Mineralogical Institute, Faculty of Science, University of Tokyo |
publishDate |
1990 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4514 http://id.nii.ac.jp/1291/00004514/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4514&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4514 http://id.nii.ac.jp/1291/00004514/ AA10784627 Proceedings of the NIPR Symposium on Antarctic Meteorites, 3, 132-146(1990-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4514&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250473253240832 |