Classification and Petrography of Some Yamato Chondritic Meteorites
P(論文) Sixteen Yamato meteorites including the Yamato-69,-74,and -75,all ordinary chondrites, are newly classified. The method for classification adopted here is based on customary microscopic observations, paying attention to the criteria for petrologic types proposed by VAN SCHMUS and WOOD (Geochim...
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ftnipr:oai:nipr.repo.nii.ac.jp:00001043 2024-09-09T19:51:59+00:00 Classification and Petrography of Some Yamato Chondritic Meteorites Kimura, Makoto Yagi, Kenzo Onuma, Kosuke 1979-12 application/pdf https://nipr.repo.nii.ac.jp/record/1043/files/KJ00000011587.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 15 41 53 AA00733561 https://nipr.repo.nii.ac.jp/record/1043/files/KJ00000011587.pdf 1979 ftnipr 2024-06-17T04:00:22Z P(論文) Sixteen Yamato meteorites including the Yamato-69,-74,and -75,all ordinary chondrites, are newly classified. The method for classification adopted here is based on customary microscopic observations, paying attention to the criteria for petrologic types proposed by VAN SCHMUS and WOOD (Geochim. Cosmochim. Acta, 31,741,1967). Compared with this, the convenient method for classification of chondrites proposed by YANAI et al. (Mem. Natl Inst. Polar Res., Spec. Issue, 8,110,1978) is examined, and its availability is ascertained. However, the difference between petrologic types of the Yamato-74492 obtained by these two methods is clearly noticed. It may suggest that this meteorite is a monomict breccia. Since the meteorites studied here are equilibrated ordinary chondrites, several characteristic features of the thermal metamorphism in parent bodies, such as devitrification of glass, mineralogical features of pyroxenes, and type of chondrule, are discussed in relation to petrologic types. For this purpose the samples studied here also include the meteorites described by KIMURA et al. (Mem. Natl Inst. Polar Res., Spec. Issue, 8,156,1978). With the Yamato-74445 extension of veining due to shock effect is described. 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) Sixteen Yamato meteorites including the Yamato-69,-74,and -75,all ordinary chondrites, are newly classified. The method for classification adopted here is based on customary microscopic observations, paying attention to the criteria for petrologic types proposed by VAN SCHMUS and WOOD (Geochim. Cosmochim. Acta, 31,741,1967). Compared with this, the convenient method for classification of chondrites proposed by YANAI et al. (Mem. Natl Inst. Polar Res., Spec. Issue, 8,110,1978) is examined, and its availability is ascertained. However, the difference between petrologic types of the Yamato-74492 obtained by these two methods is clearly noticed. It may suggest that this meteorite is a monomict breccia. Since the meteorites studied here are equilibrated ordinary chondrites, several characteristic features of the thermal metamorphism in parent bodies, such as devitrification of glass, mineralogical features of pyroxenes, and type of chondrule, are discussed in relation to petrologic types. For this purpose the samples studied here also include the meteorites described by KIMURA et al. (Mem. Natl Inst. Polar Res., Spec. Issue, 8,156,1978). With the Yamato-74445 extension of veining due to shock effect is described. departmental bulletin paper |
author |
Kimura, Makoto Yagi, Kenzo Onuma, Kosuke |
spellingShingle |
Kimura, Makoto Yagi, Kenzo Onuma, Kosuke Classification and Petrography of Some Yamato Chondritic Meteorites |
author_facet |
Kimura, Makoto Yagi, Kenzo Onuma, Kosuke |
author_sort |
Kimura, Makoto |
title |
Classification and Petrography of Some Yamato Chondritic Meteorites |
title_short |
Classification and Petrography of Some Yamato Chondritic Meteorites |
title_full |
Classification and Petrography of Some Yamato Chondritic Meteorites |
title_fullStr |
Classification and Petrography of Some Yamato Chondritic Meteorites |
title_full_unstemmed |
Classification and Petrography of Some Yamato Chondritic Meteorites |
title_sort |
classification and petrography of some yamato chondritic meteorites |
publishDate |
1979 |
url |
https://nipr.repo.nii.ac.jp/record/1043/files/KJ00000011587.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 15 41 53 AA00733561 https://nipr.repo.nii.ac.jp/record/1043/files/KJ00000011587.pdf |
_version_ |
1809921350483050496 |