A Model of the Ordinary Chondrite Parent Body: An External Heating Model
P(論文) By employing the best available constraints including the metamorphic temperature and the volume fraction of the type 6 chondrites in the parent body, we examined the external heating model for the ordinary chondrite parent body and compared the results with those obtained by the internal heat...
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ftnipr:oai:nipr.repo.nii.ac.jp:00001108 2024-09-09T19:51:58+00:00 A Model of the Ordinary Chondrite Parent Body: An External Heating Model Miyamoto, Masamichi Fujii, Naoyuki 1980-12 application/pdf https://nipr.repo.nii.ac.jp/record/1108/files/KJ00000011634.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 17 291 298 AA00733561 https://nipr.repo.nii.ac.jp/record/1108/files/KJ00000011634.pdf 1980 ftnipr 2024-06-17T04:00:22Z P(論文) By employing the best available constraints including the metamorphic temperature and the volume fraction of the type 6 chondrites in the parent body, we examined the external heating model for the ordinary chondrite parent body and compared the results with those obtained by the internal heating model. The Fourier number (k⊿ t/R^2) obtained is about 0.05 for the H-chon-drite parent body and about 0.15 for the L-chondrite parent body, respectively. The radius R for the H-chondrite parent body is 2-4km for ⊿ t∿(10)^5yr; 5-10km for ⊿ t∿(10)^6yr, where ⊿ t is the duration of the external heat source. For the Lchondrite parent body, the radius is about 0.6 times as large as that of the Lchondrite parent body. In the external heating model, the parent body of the ordinary chondrite must be small because of the short duration of the possible heat sources. The ordinary chondrite parent body (or bodies) may be the survivals (reheated and crushed afterwards, but not grown) of the planetesimals directly disintegrated from the dust layer in the primordial solar nebula. departmental bulletin paper Other/Unknown Material Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
P(論文) By employing the best available constraints including the metamorphic temperature and the volume fraction of the type 6 chondrites in the parent body, we examined the external heating model for the ordinary chondrite parent body and compared the results with those obtained by the internal heating model. The Fourier number (k⊿ t/R^2) obtained is about 0.05 for the H-chon-drite parent body and about 0.15 for the L-chondrite parent body, respectively. The radius R for the H-chondrite parent body is 2-4km for ⊿ t∿(10)^5yr; 5-10km for ⊿ t∿(10)^6yr, where ⊿ t is the duration of the external heat source. For the Lchondrite parent body, the radius is about 0.6 times as large as that of the Lchondrite parent body. In the external heating model, the parent body of the ordinary chondrite must be small because of the short duration of the possible heat sources. The ordinary chondrite parent body (or bodies) may be the survivals (reheated and crushed afterwards, but not grown) of the planetesimals directly disintegrated from the dust layer in the primordial solar nebula. departmental bulletin paper |
author |
Miyamoto, Masamichi Fujii, Naoyuki |
spellingShingle |
Miyamoto, Masamichi Fujii, Naoyuki A Model of the Ordinary Chondrite Parent Body: An External Heating Model |
author_facet |
Miyamoto, Masamichi Fujii, Naoyuki |
author_sort |
Miyamoto, Masamichi |
title |
A Model of the Ordinary Chondrite Parent Body: An External Heating Model |
title_short |
A Model of the Ordinary Chondrite Parent Body: An External Heating Model |
title_full |
A Model of the Ordinary Chondrite Parent Body: An External Heating Model |
title_fullStr |
A Model of the Ordinary Chondrite Parent Body: An External Heating Model |
title_full_unstemmed |
A Model of the Ordinary Chondrite Parent Body: An External Heating Model |
title_sort |
model of the ordinary chondrite parent body: an external heating model |
publishDate |
1980 |
url |
https://nipr.repo.nii.ac.jp/record/1108/files/KJ00000011634.pdf |
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 17 291 298 AA00733561 https://nipr.repo.nii.ac.jp/record/1108/files/KJ00000011634.pdf |
_version_ |
1809921309179641856 |