Hornblende gneisses from Syowa Station, East Antarctica
Pyroxene gneiss (charnockitic gneiss), local hornblende gneiss (bleached part of pyroxene gneiss), biotite schist, and pegmatite were newly analyzed chemically. The results together with the published analyses of regional hornblende gneisses and pyroxene gneisses show that regional hornblende gneiss...
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Department of Earth Sciences, Faculty of Science, Chiba University
1985
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ftnipr:oai:nipr.repo.nii.ac.jp:00001785 2023-05-15T13:47:59+02:00 Hornblende gneisses from Syowa Station, East Antarctica Yoshikuni Hiroi Hitoshi Onuki 1985-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1785 http://id.nii.ac.jp/1291/00001785/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1785&item_no=1&attribute_id=18&file_no=1 en eng Department of Earth Sciences, Faculty of Science, Chiba University Department of Earth Sciences, Faculty of Science, Hirosaki University https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1785 http://id.nii.ac.jp/1291/00001785/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 37, 63-81(1985-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1785&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1985 ftnipr 2022-11-12T19:42:34Z Pyroxene gneiss (charnockitic gneiss), local hornblende gneiss (bleached part of pyroxene gneiss), biotite schist, and pegmatite were newly analyzed chemically. The results together with the published analyses of regional hornblende gneisses and pyroxene gneisses show that regional hornblende gneisses generally have higher rock oxidation ratios and MgO/(MgO+FeO) ratios than pyroxene gneisses and local hornblende gneiss, in harmony with the differences in oxide mineral assemblages and in microprobe analyses of minerals. Such differences correspond to the factors controlling the stabilities of amphiboles, and suggest that regional hornblende gneisses are the products of low granulite-facies metamorphism. The difference in mineralogy among pyroxene gneiss, local hornblende gneiss, and biotite schist may be shown by an isochemical reaction. Report Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan East Antarctica Syowa Station |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Pyroxene gneiss (charnockitic gneiss), local hornblende gneiss (bleached part of pyroxene gneiss), biotite schist, and pegmatite were newly analyzed chemically. The results together with the published analyses of regional hornblende gneisses and pyroxene gneisses show that regional hornblende gneisses generally have higher rock oxidation ratios and MgO/(MgO+FeO) ratios than pyroxene gneisses and local hornblende gneiss, in harmony with the differences in oxide mineral assemblages and in microprobe analyses of minerals. Such differences correspond to the factors controlling the stabilities of amphiboles, and suggest that regional hornblende gneisses are the products of low granulite-facies metamorphism. The difference in mineralogy among pyroxene gneiss, local hornblende gneiss, and biotite schist may be shown by an isochemical reaction. |
format |
Report |
author |
Yoshikuni Hiroi Hitoshi Onuki |
spellingShingle |
Yoshikuni Hiroi Hitoshi Onuki Hornblende gneisses from Syowa Station, East Antarctica |
author_facet |
Yoshikuni Hiroi Hitoshi Onuki |
author_sort |
Yoshikuni Hiroi |
title |
Hornblende gneisses from Syowa Station, East Antarctica |
title_short |
Hornblende gneisses from Syowa Station, East Antarctica |
title_full |
Hornblende gneisses from Syowa Station, East Antarctica |
title_fullStr |
Hornblende gneisses from Syowa Station, East Antarctica |
title_full_unstemmed |
Hornblende gneisses from Syowa Station, East Antarctica |
title_sort |
hornblende gneisses from syowa station, east antarctica |
publisher |
Department of Earth Sciences, Faculty of Science, Chiba University |
publishDate |
1985 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1785 http://id.nii.ac.jp/1291/00001785/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1785&item_no=1&attribute_id=18&file_no=1 |
geographic |
East Antarctica Syowa Station |
geographic_facet |
East Antarctica Syowa Station |
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 |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1785 http://id.nii.ac.jp/1291/00001785/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 37, 63-81(1985-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1785&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248309770420224 |