Adhesive growth and abrasion of chondrules during the accretion process
Droplet chondrules are classified into three groups based on the surface features. The group A chondrules, common in the equilibrated chondrites, do not have a clear boundary with the matrix. The ambiguity of the surfaces of group A can be explained by adhesion of the matrix materials coarsened duri...
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Department of Geology and Mineralogy, Faculty of Sciences, Kyoto University
1986
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ftnipr:oai:nipr.repo.nii.ac.jp:00001966 2023-05-15T17:10:59+02:00 Adhesive growth and abrasion of chondrules during the accretion process Masao Kitamura Seiko Watanabe 1986-07 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1966 http://id.nii.ac.jp/1291/00001966/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1966&item_no=1&attribute_id=18&file_no=1 en eng Department of Geology and Mineralogy, Faculty of Sciences, Kyoto University https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1966 http://id.nii.ac.jp/1291/00001966/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 41, 222-234(1986-07) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1966&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1986 ftnipr 2022-11-12T19:42:46Z Droplet chondrules are classified into three groups based on the surface features. The group A chondrules, common in the equilibrated chondrites, do not have a clear boundary with the matrix. The ambiguity of the surfaces of group A can be explained by adhesion of the matrix materials coarsened during slow cooling. Chondrules in the unequilibrated chondrites belong to groups B and C. Though both groups B and C inherit spherical shapes of the melt droplets, the group B chondrules are characterized by zig-zag surfaces due to crystallization of olivine and pyroxene and/or adhesion of fine dusts. The group C chondrules have defined surfaces. Some of them are abraded by fine dusts into rounded shapes with smooth surfaces. The adhesion and abrasion of chondrules suggest that the accretion processes have occurred successively after the chondrule formation, and that the mechanical interaction between chondrules and dust during the accretion was different among the chemical groups and petrologic types of the chondrites. Report 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 |
Droplet chondrules are classified into three groups based on the surface features. The group A chondrules, common in the equilibrated chondrites, do not have a clear boundary with the matrix. The ambiguity of the surfaces of group A can be explained by adhesion of the matrix materials coarsened during slow cooling. Chondrules in the unequilibrated chondrites belong to groups B and C. Though both groups B and C inherit spherical shapes of the melt droplets, the group B chondrules are characterized by zig-zag surfaces due to crystallization of olivine and pyroxene and/or adhesion of fine dusts. The group C chondrules have defined surfaces. Some of them are abraded by fine dusts into rounded shapes with smooth surfaces. The adhesion and abrasion of chondrules suggest that the accretion processes have occurred successively after the chondrule formation, and that the mechanical interaction between chondrules and dust during the accretion was different among the chemical groups and petrologic types of the chondrites. |
format |
Report |
author |
Masao Kitamura Seiko Watanabe |
spellingShingle |
Masao Kitamura Seiko Watanabe Adhesive growth and abrasion of chondrules during the accretion process |
author_facet |
Masao Kitamura Seiko Watanabe |
author_sort |
Masao Kitamura |
title |
Adhesive growth and abrasion of chondrules during the accretion process |
title_short |
Adhesive growth and abrasion of chondrules during the accretion process |
title_full |
Adhesive growth and abrasion of chondrules during the accretion process |
title_fullStr |
Adhesive growth and abrasion of chondrules during the accretion process |
title_full_unstemmed |
Adhesive growth and abrasion of chondrules during the accretion process |
title_sort |
adhesive growth and abrasion of chondrules during the accretion process |
publisher |
Department of Geology and Mineralogy, Faculty of Sciences, Kyoto University |
publishDate |
1986 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1966 http://id.nii.ac.jp/1291/00001966/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1966&item_no=1&attribute_id=18&file_no=1 |
genre |
Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1966 http://id.nii.ac.jp/1291/00001966/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 41, 222-234(1986-07) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1966&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766067785916481536 |