Geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in Dronning Maud Land (East Antarctica)
The history of the tectonic evolution in central Dronning Maud Land (cDML), East Antarctica can be inferred from various zircon grains for U-Pb zircon age determination with the Laser-Ablation Inductively-Coupled-Plasma Mass Spectrometry (LA-ICP-MS) technique. The zircons grain of the different rock...
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The University of Bergen
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ftunivbergen:oai:bora.uib.no:1956/5606 2023-05-15T14:01:10+02:00 Geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in Dronning Maud Land (East Antarctica) Suliman, Amel 2011-06-15 3363513 bytes application/pdf https://hdl.handle.net/1956/5606 eng eng The University of Bergen https://hdl.handle.net/1956/5606 Copyright the author. All rights reserved Central Dronning Maud Land East Antarctica East Gondwana West Gondwana Granitoids Amphibolite facies metamorphism Granulite facies metamorphism Pan-African and Neoproterozoic-Cambrian times 756199 VDP::Mathematics and natural science: 400::Geosciences: 450::Solid earth physics: 451 Master thesis 2011 ftunivbergen 2023-03-14T17:41:53Z The history of the tectonic evolution in central Dronning Maud Land (cDML), East Antarctica can be inferred from various zircon grains for U-Pb zircon age determination with the Laser-Ablation Inductively-Coupled-Plasma Mass Spectrometry (LA-ICP-MS) technique. The zircons grain of the different rocks collected from different geographic location in cDML include the Shcherbakova area, the Holtedahlfjella and Zwiesel area. New zircon U-Pb ages have been used to establish relationships between ancient rocks, to obtain new insights into the Early Paleozoic orogenic collapse and contemporaneous voluminous late-tectonic intrusions in central Dronning Maud Land. Most of these results agree reasonably well with the supercontinent assemblage chronology of Gondwana within the cDML. The oldest ages of 1100 Ma to 910 Ma correspond to the final construction of the Rodinia. The ages of 900 Ma to 620 Ma are likely to represent a number of rifting events that are associated with the destruction of Rodinia. The U-Pb zircon ages of 610 Ma to 535 Ma corresponds with the re-assemblage of parts of E and W- Gondwana during the East-African orogeny. The youngest ages of 530 Ma to 458 Ma correspond to the Pan-African orogeny and thus the final amalgamation of Gondwana. Grenville-age rocks of ~ 1100Ma represent the oldest basement yet found in cDML that was during large-scale delamination intruded by the late-tectonic granitoids. A detrital zircon age of 950-680 Ma found in one sample of the cDML is reported from this area outside of the Schirmacher Oasis for the first time in this study. Master i Geovitenskap MAMN-GEOV GEOV399 Master Thesis Antarc* Antarctica Dronning Maud Land East Antarctica University of Bergen: Bergen Open Research Archive (BORA-UiB) Dronning Maud Land East Antarctica Holtedahlfjella ENVELOPE(9.000,9.000,-71.833,-71.833) Shcherbakova ENVELOPE(10.533,10.533,-71.833,-71.833) |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Central Dronning Maud Land East Antarctica East Gondwana West Gondwana Granitoids Amphibolite facies metamorphism Granulite facies metamorphism Pan-African and Neoproterozoic-Cambrian times 756199 VDP::Mathematics and natural science: 400::Geosciences: 450::Solid earth physics: 451 |
spellingShingle |
Central Dronning Maud Land East Antarctica East Gondwana West Gondwana Granitoids Amphibolite facies metamorphism Granulite facies metamorphism Pan-African and Neoproterozoic-Cambrian times 756199 VDP::Mathematics and natural science: 400::Geosciences: 450::Solid earth physics: 451 Suliman, Amel Geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in Dronning Maud Land (East Antarctica) |
topic_facet |
Central Dronning Maud Land East Antarctica East Gondwana West Gondwana Granitoids Amphibolite facies metamorphism Granulite facies metamorphism Pan-African and Neoproterozoic-Cambrian times 756199 VDP::Mathematics and natural science: 400::Geosciences: 450::Solid earth physics: 451 |
description |
The history of the tectonic evolution in central Dronning Maud Land (cDML), East Antarctica can be inferred from various zircon grains for U-Pb zircon age determination with the Laser-Ablation Inductively-Coupled-Plasma Mass Spectrometry (LA-ICP-MS) technique. The zircons grain of the different rocks collected from different geographic location in cDML include the Shcherbakova area, the Holtedahlfjella and Zwiesel area. New zircon U-Pb ages have been used to establish relationships between ancient rocks, to obtain new insights into the Early Paleozoic orogenic collapse and contemporaneous voluminous late-tectonic intrusions in central Dronning Maud Land. Most of these results agree reasonably well with the supercontinent assemblage chronology of Gondwana within the cDML. The oldest ages of 1100 Ma to 910 Ma correspond to the final construction of the Rodinia. The ages of 900 Ma to 620 Ma are likely to represent a number of rifting events that are associated with the destruction of Rodinia. The U-Pb zircon ages of 610 Ma to 535 Ma corresponds with the re-assemblage of parts of E and W- Gondwana during the East-African orogeny. The youngest ages of 530 Ma to 458 Ma correspond to the Pan-African orogeny and thus the final amalgamation of Gondwana. Grenville-age rocks of ~ 1100Ma represent the oldest basement yet found in cDML that was during large-scale delamination intruded by the late-tectonic granitoids. A detrital zircon age of 950-680 Ma found in one sample of the cDML is reported from this area outside of the Schirmacher Oasis for the first time in this study. Master i Geovitenskap MAMN-GEOV GEOV399 |
format |
Master Thesis |
author |
Suliman, Amel |
author_facet |
Suliman, Amel |
author_sort |
Suliman, Amel |
title |
Geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in Dronning Maud Land (East Antarctica) |
title_short |
Geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in Dronning Maud Land (East Antarctica) |
title_full |
Geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in Dronning Maud Land (East Antarctica) |
title_fullStr |
Geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in Dronning Maud Land (East Antarctica) |
title_full_unstemmed |
Geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in Dronning Maud Land (East Antarctica) |
title_sort |
geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in dronning maud land (east antarctica) |
publisher |
The University of Bergen |
publishDate |
2011 |
url |
https://hdl.handle.net/1956/5606 |
long_lat |
ENVELOPE(9.000,9.000,-71.833,-71.833) ENVELOPE(10.533,10.533,-71.833,-71.833) |
geographic |
Dronning Maud Land East Antarctica Holtedahlfjella Shcherbakova |
geographic_facet |
Dronning Maud Land East Antarctica Holtedahlfjella Shcherbakova |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica |
op_relation |
https://hdl.handle.net/1956/5606 |
op_rights |
Copyright the author. All rights reserved |
_version_ |
1766270777571672064 |