Tectonics and Metamorphism of the Region around Lutzow-Holmbukta, East Antarctica
Reviewing recent studies of the region around Lutzow-Holmbukta, the scheme of the superposing tectonics and metamorphism is summarized in chronological order as follows. 1) Formation of the Skallen and Ongul groups of the southern part of the region, in the age considerably earlier than 1100 Ma. 2)...
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Department of Geosciences, Faculty of Science, Osaka City University
1979
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ftnipr:oai:nipr.repo.nii.ac.jp:00001016 2023-05-15T13:47:58+02:00 Tectonics and Metamorphism of the Region around Lutzow-Holmbukta, East Antarctica Masaru Yoshida 1979-10 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1016 http://id.nii.ac.jp/1291/00001016/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1016&item_no=1&attribute_id=18&file_no=1 en eng Department of Geosciences, Faculty of Science, Osaka City University https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1016 http://id.nii.ac.jp/1291/00001016/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 14, 28-40(1979-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1016&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1979 ftnipr 2022-11-12T19:41:54Z Reviewing recent studies of the region around Lutzow-Holmbukta, the scheme of the superposing tectonics and metamorphism is summarized in chronological order as follows. 1) Formation of the Skallen and Ongul groups of the southern part of the region, in the age considerably earlier than 1100 Ma. 2) The D_1 tectonics of earlier nappe and later isoclinal folds with axes trending nearly parallel to the coast line of Lutzow-Holmbukta, associated with the M_1 high pressure granulite facies metamorphism with the P-T conditions around 880℃-13.5kb. 3) Formation of the Okuiwa group of the northern part of the region. 4) The M_2 intermediate pressure granulite facies metamorphism with the P-T conditions around 880℃-8.8kb, in the age around 1100Ma. 5) The D_2 tectonics of open to close folds with axes trending east-west, associated with the M_8 high grade amphibolite facies metamorphism with the P-T conditions around 680℃-5.5kb, dominating the northern part of the region. 6) The D_8 tectonics of gentle folds with axes trending nearly north-south and faults of the similar trend, associated with the intrusion of pink granites and the late phase of the M_8 low grade amphibolite facies metamorphism with the P-T conditions around 520℃-3.8kb, in the age around 400Ma. 7) The M_4 greenschist facies or slightly lower grade metamorphism. 8) The D_4 tectonics of conjugate shear fractures with acute bisectrix in the east-west direction indicating the northerly extensional stress field; the stress field is probably attributed to the beginning of the Gondwana dispersion which occurred during the Mesozoic era. Report Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan East Antarctica Ongul ENVELOPE(39.533,39.533,-69.017,-69.017) Skallen ENVELOPE(39.467,39.467,-69.650,-69.650) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Reviewing recent studies of the region around Lutzow-Holmbukta, the scheme of the superposing tectonics and metamorphism is summarized in chronological order as follows. 1) Formation of the Skallen and Ongul groups of the southern part of the region, in the age considerably earlier than 1100 Ma. 2) The D_1 tectonics of earlier nappe and later isoclinal folds with axes trending nearly parallel to the coast line of Lutzow-Holmbukta, associated with the M_1 high pressure granulite facies metamorphism with the P-T conditions around 880℃-13.5kb. 3) Formation of the Okuiwa group of the northern part of the region. 4) The M_2 intermediate pressure granulite facies metamorphism with the P-T conditions around 880℃-8.8kb, in the age around 1100Ma. 5) The D_2 tectonics of open to close folds with axes trending east-west, associated with the M_8 high grade amphibolite facies metamorphism with the P-T conditions around 680℃-5.5kb, dominating the northern part of the region. 6) The D_8 tectonics of gentle folds with axes trending nearly north-south and faults of the similar trend, associated with the intrusion of pink granites and the late phase of the M_8 low grade amphibolite facies metamorphism with the P-T conditions around 520℃-3.8kb, in the age around 400Ma. 7) The M_4 greenschist facies or slightly lower grade metamorphism. 8) The D_4 tectonics of conjugate shear fractures with acute bisectrix in the east-west direction indicating the northerly extensional stress field; the stress field is probably attributed to the beginning of the Gondwana dispersion which occurred during the Mesozoic era. |
format |
Report |
author |
Masaru Yoshida |
spellingShingle |
Masaru Yoshida Tectonics and Metamorphism of the Region around Lutzow-Holmbukta, East Antarctica |
author_facet |
Masaru Yoshida |
author_sort |
Masaru Yoshida |
title |
Tectonics and Metamorphism of the Region around Lutzow-Holmbukta, East Antarctica |
title_short |
Tectonics and Metamorphism of the Region around Lutzow-Holmbukta, East Antarctica |
title_full |
Tectonics and Metamorphism of the Region around Lutzow-Holmbukta, East Antarctica |
title_fullStr |
Tectonics and Metamorphism of the Region around Lutzow-Holmbukta, East Antarctica |
title_full_unstemmed |
Tectonics and Metamorphism of the Region around Lutzow-Holmbukta, East Antarctica |
title_sort |
tectonics and metamorphism of the region around lutzow-holmbukta, east antarctica |
publisher |
Department of Geosciences, Faculty of Science, Osaka City University |
publishDate |
1979 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1016 http://id.nii.ac.jp/1291/00001016/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1016&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(39.533,39.533,-69.017,-69.017) ENVELOPE(39.467,39.467,-69.650,-69.650) |
geographic |
East Antarctica Ongul Skallen |
geographic_facet |
East Antarctica Ongul Skallen |
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=1016 http://id.nii.ac.jp/1291/00001016/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 14, 28-40(1979-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1016&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248228577083392 |