Did diogenites form from diogenites?: A case of Yamato diogenites
P(論文) It has been found that the REE distribution in Y-74010 is considerably different between two adjacent fragments, sizes of which are at least 500mg, a fact indicative of patchy heterogeneity. In addition, it is worthwhile to note that the abundance ratios between two fragments in question are a...
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ftnipr:oai:nipr.repo.nii.ac.jp:00001206 2024-09-09T19:51:58+00:00 Did diogenites form from diogenites?: A case of Yamato diogenites Masuda, Akimasa Nakamura, Noboru Shimizu, Hiroshi Tanaka, Tsuyoshi 1981-12 application/pdf https://nipr.repo.nii.ac.jp/record/1206/files/KJ00000011732.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 20 100 105 AA00733561 https://nipr.repo.nii.ac.jp/record/1206/files/KJ00000011732.pdf 1981 ftnipr 2024-06-17T04:00:26Z P(論文) It has been found that the REE distribution in Y-74010 is considerably different between two adjacent fragments, sizes of which are at least 500mg, a fact indicative of patchy heterogeneity. In addition, it is worthwhile to note that the abundance ratios between two fragments in question are a linear function of atomic number. On the other hand, Y-74013 can be interpreted as a mixture of two distinct constituents, i.e., relatively coarse-grained pyroxene and much finer pyroxenic remnant component. It is noted that these two constituents of Y-74013 can correspond to two different kinds of parts represented by macroscopically separated patches of Y-74010 mentioned above. These observations coupled with the basically linear abundance ratios relative to atomic number suggest that (1) intense melting took place for a parental body of the Yamato diogenites, (2) two separate components reflect the coexisting solid and liquid phases and (3) the solid phase was formed from liquid, transiently as a low-Ca clinopyroxene, which subsequently changed into orthopyroxene as a finally stable form. Also it is an interesting fact that the apparent REE partition function pertaining to Y-692 appears to show discrete (quantum-like) effect. 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) It has been found that the REE distribution in Y-74010 is considerably different between two adjacent fragments, sizes of which are at least 500mg, a fact indicative of patchy heterogeneity. In addition, it is worthwhile to note that the abundance ratios between two fragments in question are a linear function of atomic number. On the other hand, Y-74013 can be interpreted as a mixture of two distinct constituents, i.e., relatively coarse-grained pyroxene and much finer pyroxenic remnant component. It is noted that these two constituents of Y-74013 can correspond to two different kinds of parts represented by macroscopically separated patches of Y-74010 mentioned above. These observations coupled with the basically linear abundance ratios relative to atomic number suggest that (1) intense melting took place for a parental body of the Yamato diogenites, (2) two separate components reflect the coexisting solid and liquid phases and (3) the solid phase was formed from liquid, transiently as a low-Ca clinopyroxene, which subsequently changed into orthopyroxene as a finally stable form. Also it is an interesting fact that the apparent REE partition function pertaining to Y-692 appears to show discrete (quantum-like) effect. departmental bulletin paper |
author |
Masuda, Akimasa Nakamura, Noboru Shimizu, Hiroshi Tanaka, Tsuyoshi |
spellingShingle |
Masuda, Akimasa Nakamura, Noboru Shimizu, Hiroshi Tanaka, Tsuyoshi Did diogenites form from diogenites?: A case of Yamato diogenites |
author_facet |
Masuda, Akimasa Nakamura, Noboru Shimizu, Hiroshi Tanaka, Tsuyoshi |
author_sort |
Masuda, Akimasa |
title |
Did diogenites form from diogenites?: A case of Yamato diogenites |
title_short |
Did diogenites form from diogenites?: A case of Yamato diogenites |
title_full |
Did diogenites form from diogenites?: A case of Yamato diogenites |
title_fullStr |
Did diogenites form from diogenites?: A case of Yamato diogenites |
title_full_unstemmed |
Did diogenites form from diogenites?: A case of Yamato diogenites |
title_sort |
did diogenites form from diogenites?: a case of yamato diogenites |
publishDate |
1981 |
url |
https://nipr.repo.nii.ac.jp/record/1206/files/KJ00000011732.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 20 100 105 AA00733561 https://nipr.repo.nii.ac.jp/record/1206/files/KJ00000011732.pdf |
_version_ |
1809921315924082688 |