Yamato Achondrite Polymict Breccias

P(論文) Electron microprobe studies have been made of pyroxenes from Yamato-7307 and Yamato-74159. Both meteorites show the brecciated texture. Yamato-7307 was identified as howardite by us previously. It contains pyroxenes similar to those of diogenites and eucrites. However, Yamato-74159 contains va...

Full description

Bibliographic Details
Main Authors: Miyamoto, Masamichi, Takeda, Hiroshi, Yanai, Keizo
Language:English
Published: 1978
Subjects:
Yamato
Memoirs of National Institute of Polar Research
Polar Research
Online Access:https://nipr.repo.nii.ac.jp/record/887/files/KJ00000011860.pdf
id ftnipr:oai:nipr.repo.nii.ac.jp:00000887
record_format openpolar
spelling ftnipr:oai:nipr.repo.nii.ac.jp:00000887 2024-09-09T19:51:58+00:00 Yamato Achondrite Polymict Breccias Miyamoto, Masamichi Takeda, Hiroshi Yanai, Keizo 1978-02 application/pdf https://nipr.repo.nii.ac.jp/record/887/files/KJ00000011860.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 8 185 197 AA00733561 https://nipr.repo.nii.ac.jp/record/887/files/KJ00000011860.pdf 1978 ftnipr 2024-06-17T04:04:30Z P(論文) Electron microprobe studies have been made of pyroxenes from Yamato-7307 and Yamato-74159. Both meteorites show the brecciated texture. Yamato-7307 was identified as howardite by us previously. It contains pyroxenes similar to those of diogenites and eucrites. However, Yamato-74159 contains various pyroxenes, calcic plagioclase, and other minerals and lithic clasts of only eucritic affinity. Within the thin section we have examined, there was found no diogenitic pyroxene. Therefore, Yamato-74159 may best be described as a eucrite polymict breccia. These two meteorites can be explained by the surface brecciation process of a proposed layered crust model on an achondrite parent body. departmental bulletin paper Other/Unknown Material Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Yamato ENVELOPE(35.583,35.583,-71.417,-71.417)
institution Open Polar
collection National Institute of Polar Research Repository, Japan
op_collection_id ftnipr
language English
description P(論文) Electron microprobe studies have been made of pyroxenes from Yamato-7307 and Yamato-74159. Both meteorites show the brecciated texture. Yamato-7307 was identified as howardite by us previously. It contains pyroxenes similar to those of diogenites and eucrites. However, Yamato-74159 contains various pyroxenes, calcic plagioclase, and other minerals and lithic clasts of only eucritic affinity. Within the thin section we have examined, there was found no diogenitic pyroxene. Therefore, Yamato-74159 may best be described as a eucrite polymict breccia. These two meteorites can be explained by the surface brecciation process of a proposed layered crust model on an achondrite parent body. departmental bulletin paper
author Miyamoto, Masamichi
Takeda, Hiroshi
Yanai, Keizo
spellingShingle Miyamoto, Masamichi
Takeda, Hiroshi
Yanai, Keizo
Yamato Achondrite Polymict Breccias
author_facet Miyamoto, Masamichi
Takeda, Hiroshi
Yanai, Keizo
author_sort Miyamoto, Masamichi
title Yamato Achondrite Polymict Breccias
title_short Yamato Achondrite Polymict Breccias
title_full Yamato Achondrite Polymict Breccias
title_fullStr Yamato Achondrite Polymict Breccias
title_full_unstemmed Yamato Achondrite Polymict Breccias
title_sort yamato achondrite polymict breccias
publishDate 1978
url https://nipr.repo.nii.ac.jp/record/887/files/KJ00000011860.pdf
long_lat ENVELOPE(35.583,35.583,-71.417,-71.417)
geographic Yamato
geographic_facet Yamato
genre Memoirs of National Institute of Polar Research
Polar Research
genre_facet Memoirs of National Institute of Polar Research
Polar Research
op_relation Memoirs of National Institute of Polar Research. Special issue
8
185
197
AA00733561
https://nipr.repo.nii.ac.jp/record/887/files/KJ00000011860.pdf
_version_ 1809921314883895296

Similar Items