A Classification for the Yamato-74 Chondrites Based on the Chemical Composition of their Olivines and Pyroxenes
P(論文) Electron microprobe studies have been made of olivines and pyroxenes in thirty three Yamato chondrites collected in Antarctica in 1974,together with two chondrites collected in 1975 and two Mt. Baldr chondrites. The small fragments used for the analyses were so chipped from the meteorites that...
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ftnipr:oai:nipr.repo.nii.ac.jp:00000882 2024-09-09T19:04:03+00:00 A Classification for the Yamato-74 Chondrites Based on the Chemical Composition of their Olivines and Pyroxenes Yanai, Keizo Miyamoto, Masamichi Takeda, Hiroshi 1978-02 application/pdf https://nipr.repo.nii.ac.jp/record/882/files/KJ00000011855.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 8 110 120 AA00733561 https://nipr.repo.nii.ac.jp/record/882/files/KJ00000011855.pdf 1978 ftnipr 2024-06-17T04:04:30Z P(論文) Electron microprobe studies have been made of olivines and pyroxenes in thirty three Yamato chondrites collected in Antarctica in 1974,together with two chondrites collected in 1975 and two Mt. Baldr chondrites. The small fragments used for the analyses were so chipped from the meteorites that contamination to the original materials is minimal. On the basis of histograms of iron contents of olivines and orthopyroxenes, the following chondrites have been identified : 4 unequilibrated chondrites; 8 H type, 2 L type and 1 LL type moderately equilibrated ones; and 12 H type, 9 L type and 1 LL type equilibrated chondrite. Absence of the E type chondrite and predominance of the H type ones are notable features but may not be significant at this stage of identification. departmental bulletin paper Other/Unknown Material Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Baldr ENVELOPE(160.567,160.567,-77.583,-77.583) 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 thirty three Yamato chondrites collected in Antarctica in 1974,together with two chondrites collected in 1975 and two Mt. Baldr chondrites. The small fragments used for the analyses were so chipped from the meteorites that contamination to the original materials is minimal. On the basis of histograms of iron contents of olivines and orthopyroxenes, the following chondrites have been identified : 4 unequilibrated chondrites; 8 H type, 2 L type and 1 LL type moderately equilibrated ones; and 12 H type, 9 L type and 1 LL type equilibrated chondrite. Absence of the E type chondrite and predominance of the H type ones are notable features but may not be significant at this stage of identification. departmental bulletin paper |
author |
Yanai, Keizo Miyamoto, Masamichi Takeda, Hiroshi |
spellingShingle |
Yanai, Keizo Miyamoto, Masamichi Takeda, Hiroshi A Classification for the Yamato-74 Chondrites Based on the Chemical Composition of their Olivines and Pyroxenes |
author_facet |
Yanai, Keizo Miyamoto, Masamichi Takeda, Hiroshi |
author_sort |
Yanai, Keizo |
title |
A Classification for the Yamato-74 Chondrites Based on the Chemical Composition of their Olivines and Pyroxenes |
title_short |
A Classification for the Yamato-74 Chondrites Based on the Chemical Composition of their Olivines and Pyroxenes |
title_full |
A Classification for the Yamato-74 Chondrites Based on the Chemical Composition of their Olivines and Pyroxenes |
title_fullStr |
A Classification for the Yamato-74 Chondrites Based on the Chemical Composition of their Olivines and Pyroxenes |
title_full_unstemmed |
A Classification for the Yamato-74 Chondrites Based on the Chemical Composition of their Olivines and Pyroxenes |
title_sort |
classification for the yamato-74 chondrites based on the chemical composition of their olivines and pyroxenes |
publishDate |
1978 |
url |
https://nipr.repo.nii.ac.jp/record/882/files/KJ00000011855.pdf |
long_lat |
ENVELOPE(160.567,160.567,-77.583,-77.583) ENVELOPE(35.583,35.583,-71.417,-71.417) |
geographic |
Baldr Yamato |
geographic_facet |
Baldr Yamato |
genre |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
Memoirs of National Institute of Polar Research. Special issue 8 110 120 AA00733561 https://nipr.repo.nii.ac.jp/record/882/files/KJ00000011855.pdf |
_version_ |
1809818052641947648 |