Geology and Petrography of the Northern Yamato Mountains, East Antarctica (Earth Sciences)
P(論文) In the northern Yamato Mountains, there are two groups of rocks. One is the syenite gneiss group which was metamorphosed under the granulite facies conditions. The other is the granite gneiss group which was metamorphosed under the amphibolite facies conditions. Besides, metabasites and acid d...
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ftnipr:oai:nipr.repo.nii.ac.jp:00000607 2024-09-09T19:06:37+00:00 Geology and Petrography of the Northern Yamato Mountains, East Antarctica (Earth Sciences) SHIRAISHI, Kazuyuki 1977-10 application/pdf https://nipr.repo.nii.ac.jp/record/607/files/KJ00000011294.pdf eng eng Memoirs of National Institute of Polar Research. Ser. C, Earth sciences 12 1 33 AA00733470 https://nipr.repo.nii.ac.jp/record/607/files/KJ00000011294.pdf 1977 ftnipr 2024-06-17T04:02:37Z P(論文) In the northern Yamato Mountains, there are two groups of rocks. One is the syenite gneiss group which was metamorphosed under the granulite facies conditions. The other is the granite gneiss group which was metamorphosed under the amphibolite facies conditions. Besides, metabasites and acid dykes are found to accompany them. There is gradational transition between the two groups of the rocks, and it is revealed from the field and microscopic observations that the transition is not progressive metamorphism but the early-formed syenite gneiss was activated under the amphibolite facies conditions resulting in the granite gneiss. According to the bulk chemical analysis the trend of the granitization in the diagram, norm q-or-ab-ne, is characterized by the decrease of "or" and the increase of "q". Finally the point of eutectic minimum is reached. Therefore, it seems evident that the granitization occurred in association with anatexis. departmental bulletin paper Other/Unknown Material Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan East Antarctica 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) In the northern Yamato Mountains, there are two groups of rocks. One is the syenite gneiss group which was metamorphosed under the granulite facies conditions. The other is the granite gneiss group which was metamorphosed under the amphibolite facies conditions. Besides, metabasites and acid dykes are found to accompany them. There is gradational transition between the two groups of the rocks, and it is revealed from the field and microscopic observations that the transition is not progressive metamorphism but the early-formed syenite gneiss was activated under the amphibolite facies conditions resulting in the granite gneiss. According to the bulk chemical analysis the trend of the granitization in the diagram, norm q-or-ab-ne, is characterized by the decrease of "or" and the increase of "q". Finally the point of eutectic minimum is reached. Therefore, it seems evident that the granitization occurred in association with anatexis. departmental bulletin paper |
author |
SHIRAISHI, Kazuyuki |
spellingShingle |
SHIRAISHI, Kazuyuki Geology and Petrography of the Northern Yamato Mountains, East Antarctica (Earth Sciences) |
author_facet |
SHIRAISHI, Kazuyuki |
author_sort |
SHIRAISHI, Kazuyuki |
title |
Geology and Petrography of the Northern Yamato Mountains, East Antarctica (Earth Sciences) |
title_short |
Geology and Petrography of the Northern Yamato Mountains, East Antarctica (Earth Sciences) |
title_full |
Geology and Petrography of the Northern Yamato Mountains, East Antarctica (Earth Sciences) |
title_fullStr |
Geology and Petrography of the Northern Yamato Mountains, East Antarctica (Earth Sciences) |
title_full_unstemmed |
Geology and Petrography of the Northern Yamato Mountains, East Antarctica (Earth Sciences) |
title_sort |
geology and petrography of the northern yamato mountains, east antarctica (earth sciences) |
publishDate |
1977 |
url |
https://nipr.repo.nii.ac.jp/record/607/files/KJ00000011294.pdf |
long_lat |
ENVELOPE(35.583,35.583,-71.417,-71.417) |
geographic |
East Antarctica Yamato |
geographic_facet |
East Antarctica Yamato |
genre |
Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
Memoirs of National Institute of Polar Research. Ser. C, Earth sciences 12 1 33 AA00733470 https://nipr.repo.nii.ac.jp/record/607/files/KJ00000011294.pdf |
_version_ |
1809820670870159360 |