Rb-Sr whole-rock ages of metamorphic rocks from eastern Queen Maud Land, East Antarctica
Rb-Sr whole-rock isochron ages were determined on the Lutzow-Holm and Yamato-Belgica Complexes from eastern Queen Maud Land. Metamorphic rocks from East Ongul Island, Nesoya, Sinnan Rocks and the Yamato Mountains gave ages ranging between 683.0 and 722.1Ma. Rocks from Skarvsnes gave older ages of 11...
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Geological Survey of Japan/National Institute of Polar Research/National Institute of Polar Research
1986
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ftnipr:oai:nipr.repo.nii.ac.jp:00002018 2023-05-15T13:47:59+02:00 Rb-Sr whole-rock ages of metamorphic rocks from eastern Queen Maud Land, East Antarctica Ken Shibata Keizo Yanai Kazuyuki Shiraishi 1986-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2018 http://id.nii.ac.jp/1291/00002018/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2018&item_no=1&attribute_id=18&file_no=1 en eng Geological Survey of Japan/National Institute of Polar Research/National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2018 http://id.nii.ac.jp/1291/00002018/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 43, 133-148(1986-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2018&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1986 ftnipr 2022-11-12T19:42:52Z Rb-Sr whole-rock isochron ages were determined on the Lutzow-Holm and Yamato-Belgica Complexes from eastern Queen Maud Land. Metamorphic rocks from East Ongul Island, Nesoya, Sinnan Rocks and the Yamato Mountains gave ages ranging between 683.0 and 722.1Ma. Rocks from Skarvsnes gave older ages of 1131 and 1033Ma. All these ages are interpreted to represent the times of high-grade metamorphism. The Skarvsnes area was apparently not affected by the 700Ma metamorphism. The initial ^<87>Sr/^<86>Sr ratios of metamorphic rocks show a considerable variation on local as well as regional scale. The higher initial ratios of the Yamato Mountains suggest that the protolith of the Yamato-Belgica Complex is older than that of the Lutzow-Holm Complex. Report Antarc* Antarctica East Antarctica East Ongul Island Memoirs of National Institute of Polar Research Ongul Island Polar Research Queen Maud Land National Institute of Polar Research Repository, Japan East Antarctica East Ongul Island ENVELOPE(39.583,39.583,-69.017,-69.017) Nesoya ENVELOPE(39.567,39.567,-69.000,-69.000) Ongul ENVELOPE(39.533,39.533,-69.017,-69.017) Ongul Island ENVELOPE(39.533,39.533,-69.017,-69.017) Queen Maud Land ENVELOPE(12.000,12.000,-72.500,-72.500) Skarvsnes ENVELOPE(39.667,39.667,-69.467,-69.467) 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 |
Rb-Sr whole-rock isochron ages were determined on the Lutzow-Holm and Yamato-Belgica Complexes from eastern Queen Maud Land. Metamorphic rocks from East Ongul Island, Nesoya, Sinnan Rocks and the Yamato Mountains gave ages ranging between 683.0 and 722.1Ma. Rocks from Skarvsnes gave older ages of 1131 and 1033Ma. All these ages are interpreted to represent the times of high-grade metamorphism. The Skarvsnes area was apparently not affected by the 700Ma metamorphism. The initial ^<87>Sr/^<86>Sr ratios of metamorphic rocks show a considerable variation on local as well as regional scale. The higher initial ratios of the Yamato Mountains suggest that the protolith of the Yamato-Belgica Complex is older than that of the Lutzow-Holm Complex. |
format |
Report |
author |
Ken Shibata Keizo Yanai Kazuyuki Shiraishi |
spellingShingle |
Ken Shibata Keizo Yanai Kazuyuki Shiraishi Rb-Sr whole-rock ages of metamorphic rocks from eastern Queen Maud Land, East Antarctica |
author_facet |
Ken Shibata Keizo Yanai Kazuyuki Shiraishi |
author_sort |
Ken Shibata |
title |
Rb-Sr whole-rock ages of metamorphic rocks from eastern Queen Maud Land, East Antarctica |
title_short |
Rb-Sr whole-rock ages of metamorphic rocks from eastern Queen Maud Land, East Antarctica |
title_full |
Rb-Sr whole-rock ages of metamorphic rocks from eastern Queen Maud Land, East Antarctica |
title_fullStr |
Rb-Sr whole-rock ages of metamorphic rocks from eastern Queen Maud Land, East Antarctica |
title_full_unstemmed |
Rb-Sr whole-rock ages of metamorphic rocks from eastern Queen Maud Land, East Antarctica |
title_sort |
rb-sr whole-rock ages of metamorphic rocks from eastern queen maud land, east antarctica |
publisher |
Geological Survey of Japan/National Institute of Polar Research/National Institute of Polar Research |
publishDate |
1986 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2018 http://id.nii.ac.jp/1291/00002018/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2018&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(39.583,39.583,-69.017,-69.017) ENVELOPE(39.567,39.567,-69.000,-69.000) ENVELOPE(39.533,39.533,-69.017,-69.017) ENVELOPE(39.533,39.533,-69.017,-69.017) ENVELOPE(12.000,12.000,-72.500,-72.500) ENVELOPE(39.667,39.667,-69.467,-69.467) ENVELOPE(35.583,35.583,-71.417,-71.417) |
geographic |
East Antarctica East Ongul Island Nesoya Ongul Ongul Island Queen Maud Land Skarvsnes Yamato |
geographic_facet |
East Antarctica East Ongul Island Nesoya Ongul Ongul Island Queen Maud Land Skarvsnes Yamato |
genre |
Antarc* Antarctica East Antarctica East Ongul Island Memoirs of National Institute of Polar Research Ongul Island Polar Research Queen Maud Land |
genre_facet |
Antarc* Antarctica East Antarctica East Ongul Island Memoirs of National Institute of Polar Research Ongul Island Polar Research Queen Maud Land |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2018 http://id.nii.ac.jp/1291/00002018/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 43, 133-148(1986-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2018&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248336607674368 |