A Classification of the Yamato-75 Chondrites Based on Chemical Compositions of Olivines and Pyroxenes
P(論文) Electron microprobe studies have been made of olivines and pyroxenes in fifteen Yamato chondrites which were collected from the Yamato Mountains area, East Antarctica by the 16th Japanese Antarctic Research Expedition (1974-1976). Of these meteorites, thirteen chondrites are described for the...
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ftnipr:oai:nipr.repo.nii.ac.jp:00000960 2024-09-09T19:04:03+00:00 A Classification of the Yamato-75 Chondrites Based on Chemical Compositions of Olivines and Pyroxenes Matsumoto, Yukio Hayashi, Masao Miyamoto, Masamichi Takeda, Hiroshi Yanai, Keizo 1979-03 application/pdf https://nipr.repo.nii.ac.jp/record/960/files/KJ00000011506.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 12 72 81 AA00733561 https://nipr.repo.nii.ac.jp/record/960/files/KJ00000011506.pdf 1979 ftnipr 2024-06-17T04:04:49Z P(論文) Electron microprobe studies have been made of olivines and pyroxenes in fifteen Yamato chondrites which were collected from the Yamato Mountains area, East Antarctica by the 16th Japanese Antarctic Research Expedition (1974-1976). Of these meteorites, thirteen chondrites are described for the first time, and two other chondrites (Yamato-75028 and -75102) were already reported by YANAI et al. (Mem. Natl Inst. Polar Res., Spec. Issue, 8,110,1978). The very small fragments used for the analyses were so chipped from the meteorites that contamination to the original materials is minimal. On the basis of histogram of iron contents of olivines and orthopyroxenes, the following predominance have been identified : viz., 1 unequilibrated chondrite; 2 H type and 3 L type moderately equilibrated ordinary chondrites; and 4 H type and 5 L type equilibrated chondrites. The absence of the E type chondrite and the predominance of the H and L type chondrites are notable features but may not be significant at this stage of identification. departmental bulletin paper Other/Unknown Material Antarc* Antarctic Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Antarctic East Antarctica 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 olivines and pyroxenes in fifteen Yamato chondrites which were collected from the Yamato Mountains area, East Antarctica by the 16th Japanese Antarctic Research Expedition (1974-1976). Of these meteorites, thirteen chondrites are described for the first time, and two other chondrites (Yamato-75028 and -75102) were already reported by YANAI et al. (Mem. Natl Inst. Polar Res., Spec. Issue, 8,110,1978). The very small fragments used for the analyses were so chipped from the meteorites that contamination to the original materials is minimal. On the basis of histogram of iron contents of olivines and orthopyroxenes, the following predominance have been identified : viz., 1 unequilibrated chondrite; 2 H type and 3 L type moderately equilibrated ordinary chondrites; and 4 H type and 5 L type equilibrated chondrites. The absence of the E type chondrite and the predominance of the H and L type chondrites are notable features but may not be significant at this stage of identification. departmental bulletin paper |
author |
Matsumoto, Yukio Hayashi, Masao Miyamoto, Masamichi Takeda, Hiroshi Yanai, Keizo |
spellingShingle |
Matsumoto, Yukio Hayashi, Masao Miyamoto, Masamichi Takeda, Hiroshi Yanai, Keizo A Classification of the Yamato-75 Chondrites Based on Chemical Compositions of Olivines and Pyroxenes |
author_facet |
Matsumoto, Yukio Hayashi, Masao Miyamoto, Masamichi Takeda, Hiroshi Yanai, Keizo |
author_sort |
Matsumoto, Yukio |
title |
A Classification of the Yamato-75 Chondrites Based on Chemical Compositions of Olivines and Pyroxenes |
title_short |
A Classification of the Yamato-75 Chondrites Based on Chemical Compositions of Olivines and Pyroxenes |
title_full |
A Classification of the Yamato-75 Chondrites Based on Chemical Compositions of Olivines and Pyroxenes |
title_fullStr |
A Classification of the Yamato-75 Chondrites Based on Chemical Compositions of Olivines and Pyroxenes |
title_full_unstemmed |
A Classification of the Yamato-75 Chondrites Based on Chemical Compositions of Olivines and Pyroxenes |
title_sort |
classification of the yamato-75 chondrites based on chemical compositions of olivines and pyroxenes |
publishDate |
1979 |
url |
https://nipr.repo.nii.ac.jp/record/960/files/KJ00000011506.pdf |
long_lat |
ENVELOPE(35.583,35.583,-71.417,-71.417) |
geographic |
Antarctic East Antarctica Yamato |
geographic_facet |
Antarctic East Antarctica Yamato |
genre |
Antarc* Antarctic Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
Memoirs of National Institute of Polar Research. Special issue 12 72 81 AA00733561 https://nipr.repo.nii.ac.jp/record/960/files/KJ00000011506.pdf |
_version_ |
1809818047492390912 |