Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly
Dronning Maud Land contains a fragment of an Archaean craton covered by sedimentary and magmatic rocks of Mesoproterozoic age, surrounded by a Late Mesoproterozoic metamorphic belt. Tectonothermal events at the end of the Mesoproterozoic and in Late Neoproterozoic-Cambrian times (Pan-African) have b...
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2003
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ftnerc:oai:nora.nerc.ac.uk:3763 2024-06-09T07:40:24+00:00 Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly Bauer, W. Thomas, Robert James Jacobs, J. Yoshida, M. Windley, B.F. Dasgupta, S. 2003 http://nora.nerc.ac.uk/id/eprint/3763/ http://sp.lyellcollection.org/content/vol206/issue1/ unknown Geological Society of London Bauer, W.; Thomas, Robert James; Jacobs, J. 2003 Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly. In: Yoshida, M.; Windley, B.F.; Dasgupta, S., (eds.) Proterozoic East Gondwana : supercontinent assembly and breakup. London, UK, Geological Society of London, 247-269. (Special publications, 206, 206). Earth Sciences Publication - Book Section PeerReviewed 2003 ftnerc 2024-05-15T08:46:53Z Dronning Maud Land contains a fragment of an Archaean craton covered by sedimentary and magmatic rocks of Mesoproterozoic age, surrounded by a Late Mesoproterozoic metamorphic belt. Tectonothermal events at the end of the Mesoproterozoic and in Late Neoproterozoic-Cambrian times (Pan-African) have been proved within the metamorphic belt. In western Dronning Maud Land a juvenile Mesoproterozoic basement was accreted to the craton at c. 1.1 Ga. Mesoproterozoic rocks were also detected by zircon SHRIMP dating of gneisses in central Dronning Maud Land, followed by a long hiatus for which geochronological data are lacking, an amphibolite to granulite facies metamorphism and syntectonic granitoid emplacement of Pan-African age have been dated. During this orogeny older structures were completely overprinted in a sinistral tranpressive deformation regime, leading to the mainly coast-parallel tectonic structures of the East Antarctic Orogen. Putting Antarctica back in its Gondwana position, the East Antarctic Orogen continues northward in East Africa as the East African Orogen, whereas a connection to the marginal Ross Orogen at the Pacific margin of East Antarctica is suggested along the Shackleton Range. The East Antarctic-East African Orogen resulted from closure of the Mozambique Ocean and collision of West and East Gondwana, i.e. western Dronning Maud Land was part of West Gondwana. During this collision the lithospheric mantle probably delaminated, allowing the asthenosphere to underplate the continental crust and producing heat for the voluminous, typically anhydrous, Pan-African granitoids of central Dronning Maud Land. Book Part Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic Dronning Maud Land East Antarctica Pacific Shackleton Shackleton Range ENVELOPE(-26.000,-26.000,-80.833,-80.833) |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Bauer, W. Thomas, Robert James Jacobs, J. Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly |
topic_facet |
Earth Sciences |
description |
Dronning Maud Land contains a fragment of an Archaean craton covered by sedimentary and magmatic rocks of Mesoproterozoic age, surrounded by a Late Mesoproterozoic metamorphic belt. Tectonothermal events at the end of the Mesoproterozoic and in Late Neoproterozoic-Cambrian times (Pan-African) have been proved within the metamorphic belt. In western Dronning Maud Land a juvenile Mesoproterozoic basement was accreted to the craton at c. 1.1 Ga. Mesoproterozoic rocks were also detected by zircon SHRIMP dating of gneisses in central Dronning Maud Land, followed by a long hiatus for which geochronological data are lacking, an amphibolite to granulite facies metamorphism and syntectonic granitoid emplacement of Pan-African age have been dated. During this orogeny older structures were completely overprinted in a sinistral tranpressive deformation regime, leading to the mainly coast-parallel tectonic structures of the East Antarctic Orogen. Putting Antarctica back in its Gondwana position, the East Antarctic Orogen continues northward in East Africa as the East African Orogen, whereas a connection to the marginal Ross Orogen at the Pacific margin of East Antarctica is suggested along the Shackleton Range. The East Antarctic-East African Orogen resulted from closure of the Mozambique Ocean and collision of West and East Gondwana, i.e. western Dronning Maud Land was part of West Gondwana. During this collision the lithospheric mantle probably delaminated, allowing the asthenosphere to underplate the continental crust and producing heat for the voluminous, typically anhydrous, Pan-African granitoids of central Dronning Maud Land. |
author2 |
Yoshida, M. Windley, B.F. Dasgupta, S. |
format |
Book Part |
author |
Bauer, W. Thomas, Robert James Jacobs, J. |
author_facet |
Bauer, W. Thomas, Robert James Jacobs, J. |
author_sort |
Bauer, W. |
title |
Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly |
title_short |
Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly |
title_full |
Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly |
title_fullStr |
Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly |
title_full_unstemmed |
Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly |
title_sort |
proterozoic-cambrian history of dronning maud land in the context of gondwana assembly |
publisher |
Geological Society of London |
publishDate |
2003 |
url |
http://nora.nerc.ac.uk/id/eprint/3763/ http://sp.lyellcollection.org/content/vol206/issue1/ |
long_lat |
ENVELOPE(-26.000,-26.000,-80.833,-80.833) |
geographic |
Antarctic Dronning Maud Land East Antarctica Pacific Shackleton Shackleton Range |
geographic_facet |
Antarctic Dronning Maud Land East Antarctica Pacific Shackleton Shackleton Range |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica |
op_relation |
Bauer, W.; Thomas, Robert James; Jacobs, J. 2003 Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly. In: Yoshida, M.; Windley, B.F.; Dasgupta, S., (eds.) Proterozoic East Gondwana : supercontinent assembly and breakup. London, UK, Geological Society of London, 247-269. (Special publications, 206, 206). |
_version_ |
1801383816696168448 |