Structural analysis of the Lutzow-Holm Complex in Akarui Point, East Antarctica, and overview of the complex
Two phases of major deformation are responsible for the dominant structures at Akarui Point, Prince Olav Coast, East Antarctica. The first phase, referred to as D_(m-1), is associated with the formation of foliation defined by biotite and hornblende aligned sub-parallel to compositional layering. Th...
Main Authors: | , |
---|---|
Format: | Report |
Language: | English |
Published: |
Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University/Department of Earth Sciences, Faculty of Education, Okayama University
2004
|
Subjects: | |
Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3134 http://id.nii.ac.jp/1291/00003134/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3134&item_no=1&attribute_id=18&file_no=1 |
id |
ftnipr:oai:nipr.repo.nii.ac.jp:00003134 |
---|---|
record_format |
openpolar |
spelling |
ftnipr:oai:nipr.repo.nii.ac.jp:00003134 2023-05-15T13:49:00+02:00 Structural analysis of the Lutzow-Holm Complex in Akarui Point, East Antarctica, and overview of the complex Ikeda,Takeshi Kawakami,Tetsuo 2004-10 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3134 http://id.nii.ac.jp/1291/00003134/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3134&item_no=1&attribute_id=18&file_no=1 en eng Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University/Department of Earth Sciences, Faculty of Education, Okayama University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3134 http://id.nii.ac.jp/1291/00003134/ AA1130866X Polar geoscience, 17, 22-34(2004-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3134&item_no=1&attribute_id=18&file_no=1 structural analysis deformation Akarui Point Lutzow-Holm Complex Departmental Bulletin Paper P(論文) 2004 ftnipr 2022-12-03T19:43:04Z Two phases of major deformation are responsible for the dominant structures at Akarui Point, Prince Olav Coast, East Antarctica. The first phase, referred to as D_(m-1), is associated with the formation of foliation defined by biotite and hornblende aligned sub-parallel to compositional layering. The foliation is locally parallel to the axial planes of isoclinal and intrafolial folds of gneissic layers. Boudins are present with long axes subparallel to the axes of F_(m-1) folds. A second phase of deformation, denoted as D_m, produced a crenulation lineation and axial planar foliation that trends NW-SE throughout the area. This foliation is parallel to the axial plane of the large-scale Akarui Point Synform, which has a fold axis plunging gently SE, suggesting that the Akarui Point Synform formed during D_m. A locally-developed third phase of deformation (D_(m+1)) produced gentle folding of S_(m-1) and S_m. Chemical compositions of biotite grains that define S_(m-1) and S_m are similar. Migmatite shows close associations with D_(m-1) and D_m structures. This suggests that both phases of deformation were contemporaneous with high-grade metamorphism. Compilation of structural data in other areas reveals that D_(m-1) and D_m controlled dominant structures of the Lutzow-Holm Complex. Several folding events after D_m may be responsible for differing orientations of D_m structures between localities. Report Antarc* Antarctica East Antarctica Polar geoscience Prince Olav Coast National Institute of Polar Research Repository, Japan East Antarctica Prince Olav Coast ENVELOPE(41.000,41.000,-69.000,-69.000) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
structural analysis deformation Akarui Point Lutzow-Holm Complex |
spellingShingle |
structural analysis deformation Akarui Point Lutzow-Holm Complex Ikeda,Takeshi Kawakami,Tetsuo Structural analysis of the Lutzow-Holm Complex in Akarui Point, East Antarctica, and overview of the complex |
topic_facet |
structural analysis deformation Akarui Point Lutzow-Holm Complex |
description |
Two phases of major deformation are responsible for the dominant structures at Akarui Point, Prince Olav Coast, East Antarctica. The first phase, referred to as D_(m-1), is associated with the formation of foliation defined by biotite and hornblende aligned sub-parallel to compositional layering. The foliation is locally parallel to the axial planes of isoclinal and intrafolial folds of gneissic layers. Boudins are present with long axes subparallel to the axes of F_(m-1) folds. A second phase of deformation, denoted as D_m, produced a crenulation lineation and axial planar foliation that trends NW-SE throughout the area. This foliation is parallel to the axial plane of the large-scale Akarui Point Synform, which has a fold axis plunging gently SE, suggesting that the Akarui Point Synform formed during D_m. A locally-developed third phase of deformation (D_(m+1)) produced gentle folding of S_(m-1) and S_m. Chemical compositions of biotite grains that define S_(m-1) and S_m are similar. Migmatite shows close associations with D_(m-1) and D_m structures. This suggests that both phases of deformation were contemporaneous with high-grade metamorphism. Compilation of structural data in other areas reveals that D_(m-1) and D_m controlled dominant structures of the Lutzow-Holm Complex. Several folding events after D_m may be responsible for differing orientations of D_m structures between localities. |
format |
Report |
author |
Ikeda,Takeshi Kawakami,Tetsuo |
author_facet |
Ikeda,Takeshi Kawakami,Tetsuo |
author_sort |
Ikeda,Takeshi |
title |
Structural analysis of the Lutzow-Holm Complex in Akarui Point, East Antarctica, and overview of the complex |
title_short |
Structural analysis of the Lutzow-Holm Complex in Akarui Point, East Antarctica, and overview of the complex |
title_full |
Structural analysis of the Lutzow-Holm Complex in Akarui Point, East Antarctica, and overview of the complex |
title_fullStr |
Structural analysis of the Lutzow-Holm Complex in Akarui Point, East Antarctica, and overview of the complex |
title_full_unstemmed |
Structural analysis of the Lutzow-Holm Complex in Akarui Point, East Antarctica, and overview of the complex |
title_sort |
structural analysis of the lutzow-holm complex in akarui point, east antarctica, and overview of the complex |
publisher |
Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University/Department of Earth Sciences, Faculty of Education, Okayama University |
publishDate |
2004 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3134 http://id.nii.ac.jp/1291/00003134/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3134&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(41.000,41.000,-69.000,-69.000) |
geographic |
East Antarctica Prince Olav Coast |
geographic_facet |
East Antarctica Prince Olav Coast |
genre |
Antarc* Antarctica East Antarctica Polar geoscience Prince Olav Coast |
genre_facet |
Antarc* Antarctica East Antarctica Polar geoscience Prince Olav Coast |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3134 http://id.nii.ac.jp/1291/00003134/ AA1130866X Polar geoscience, 17, 22-34(2004-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3134&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250365129326592 |