Timing of thermal events in eastern Dronning Maud Land, East Antarctica
Using cathodoluminescence (CL)images,the zircons analyzed by K. Shiraishi et al.(J.Geol.,102,47,1994) for SHRIMP U-Pb dating (prior to the use of CL images) have been re-examined in order to unravel the periods of multiple zircon growth in eastern Dronning Maud Land.In addition four new SHRIMP U-Pb...
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National Institute of Polar Research/National Institute of Polar Research/Research School of Earth Sciences, The Australian National University/National Institute of Polar Research/National Institute of Polar Research
2003
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ftnipr:oai:nipr.repo.nii.ac.jp:00003123 2023-05-15T13:49:00+02:00 Timing of thermal events in eastern Dronning Maud Land, East Antarctica Kazuyuki Shiraishi Tomokazu Hokada C.M. Fanning Keiji Misawa Yoichi Motoyoshi 2003-10 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3123 http://id.nii.ac.jp/1291/00003123/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3123&item_no=1&attribute_id=18&file_no=1 en eng National Institute of Polar Research/National Institute of Polar Research/Research School of Earth Sciences, The Australian National University/National Institute of Polar Research/National Institute of Polar Research National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3123 http://id.nii.ac.jp/1291/00003123/ AA1130866X Polar geoscience, 16, 76-99(2003-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3123&item_no=1&attribute_id=18&file_no=1 CL image SHRIMP U-Pb zircon age Pan-African East Antarctica Gondwana Departmental Bulletin Paper P(論文) 2003 ftnipr 2022-12-03T19:43:04Z Using cathodoluminescence (CL)images,the zircons analyzed by K. Shiraishi et al.(J.Geol.,102,47,1994) for SHRIMP U-Pb dating (prior to the use of CL images) have been re-examined in order to unravel the periods of multiple zircon growth in eastern Dronning Maud Land.In addition four new SHRIMP U-Pb zircon age determinations are presented:two from the Yamato Mountains and two from the Lutzow-Holm Complex (LHC).The major conclusion from this study is that the Grenvillian basement is not ubiquitous in the LHC.Some outcrops are of late Archean-Paleoproterozoic crustal fragments reworked during the Pan-African event. In such cases,there is no indication of a Grenvillian event.Other protoliths are derived from Meso-Neoproterozoic juvenile crust and recycled continental sediments from the margin of the craton.Thus the pre-history of the Pan-African LHC is not uniform.In the Yamato Mountains,two stages of the Pan-African event are suggested,at ~620 Ma and ~535 Ma. These two stages are similar to those recorded in the Sφr Rondane Mountains and central Dronning Maud Land further to the west.These new and revised,updated results provide important constraints on tectonic models for the formation of Gondwana. Report Antarc* Antarctica Dronning Maud Land East Antarctica Polar geoscience National Institute of Polar Research Repository, Japan East Antarctica Dronning Maud Land 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 |
topic |
CL image SHRIMP U-Pb zircon age Pan-African East Antarctica Gondwana |
spellingShingle |
CL image SHRIMP U-Pb zircon age Pan-African East Antarctica Gondwana Kazuyuki Shiraishi Tomokazu Hokada C.M. Fanning Keiji Misawa Yoichi Motoyoshi Timing of thermal events in eastern Dronning Maud Land, East Antarctica |
topic_facet |
CL image SHRIMP U-Pb zircon age Pan-African East Antarctica Gondwana |
description |
Using cathodoluminescence (CL)images,the zircons analyzed by K. Shiraishi et al.(J.Geol.,102,47,1994) for SHRIMP U-Pb dating (prior to the use of CL images) have been re-examined in order to unravel the periods of multiple zircon growth in eastern Dronning Maud Land.In addition four new SHRIMP U-Pb zircon age determinations are presented:two from the Yamato Mountains and two from the Lutzow-Holm Complex (LHC).The major conclusion from this study is that the Grenvillian basement is not ubiquitous in the LHC.Some outcrops are of late Archean-Paleoproterozoic crustal fragments reworked during the Pan-African event. In such cases,there is no indication of a Grenvillian event.Other protoliths are derived from Meso-Neoproterozoic juvenile crust and recycled continental sediments from the margin of the craton.Thus the pre-history of the Pan-African LHC is not uniform.In the Yamato Mountains,two stages of the Pan-African event are suggested,at ~620 Ma and ~535 Ma. These two stages are similar to those recorded in the Sφr Rondane Mountains and central Dronning Maud Land further to the west.These new and revised,updated results provide important constraints on tectonic models for the formation of Gondwana. |
format |
Report |
author |
Kazuyuki Shiraishi Tomokazu Hokada C.M. Fanning Keiji Misawa Yoichi Motoyoshi |
author_facet |
Kazuyuki Shiraishi Tomokazu Hokada C.M. Fanning Keiji Misawa Yoichi Motoyoshi |
author_sort |
Kazuyuki Shiraishi |
title |
Timing of thermal events in eastern Dronning Maud Land, East Antarctica |
title_short |
Timing of thermal events in eastern Dronning Maud Land, East Antarctica |
title_full |
Timing of thermal events in eastern Dronning Maud Land, East Antarctica |
title_fullStr |
Timing of thermal events in eastern Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Timing of thermal events in eastern Dronning Maud Land, East Antarctica |
title_sort |
timing of thermal events in eastern dronning maud land, east antarctica |
publisher |
National Institute of Polar Research/National Institute of Polar Research/Research School of Earth Sciences, The Australian National University/National Institute of Polar Research/National Institute of Polar Research |
publishDate |
2003 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3123 http://id.nii.ac.jp/1291/00003123/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3123&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(35.583,35.583,-71.417,-71.417) |
geographic |
East Antarctica Dronning Maud Land Yamato |
geographic_facet |
East Antarctica Dronning Maud Land Yamato |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica Polar geoscience |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica Polar geoscience |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3123 http://id.nii.ac.jp/1291/00003123/ AA1130866X Polar geoscience, 16, 76-99(2003-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3123&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250363866841088 |