Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland
The parallel Trans-Hudson-aged Nagssugtoqidian Orogen and Rinkian Fold Belt of West Greenland have long been considered distinct orogenic belts separated by a zone of low or no Palaeoproterozoic strain in the intervening Disko Bugt region. New U-Pb geochronology confirms the continuity of Palaeoprot...
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2006
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Online Access: | https://curis.ku.dk/portal/da/publications/linking-the-palaeoproterozoic-nagssugtoqidian-and-rinkian-orogens-through-the-disko-bugt-region-of-west-greenland(495f97de-d676-4bc1-86fa-6b46dd710c1e).html https://doi.org/10.1144/0016-764904-115 http://www.scopus.com/inward/record.url?scp=33644764904&partnerID=8YFLogxK |
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ftcopenhagenunip:oai:pure.atira.dk:publications/495f97de-d676-4bc1-86fa-6b46dd710c1e 2023-05-15T16:01:06+02:00 Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland Connelly, James N. Thrane, Kristine Krawiec, Adam W. Garde, Adam A. 2006-03 https://curis.ku.dk/portal/da/publications/linking-the-palaeoproterozoic-nagssugtoqidian-and-rinkian-orogens-through-the-disko-bugt-region-of-west-greenland(495f97de-d676-4bc1-86fa-6b46dd710c1e).html https://doi.org/10.1144/0016-764904-115 http://www.scopus.com/inward/record.url?scp=33644764904&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Connelly , J N , Thrane , K , Krawiec , A W & Garde , A A 2006 , ' Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland ' , Journal of the Geological Society , vol. 163 , no. 2 , pp. 319-335 . https://doi.org/10.1144/0016-764904-115 article 2006 ftcopenhagenunip https://doi.org/10.1144/0016-764904-115 2023-02-01T23:54:39Z The parallel Trans-Hudson-aged Nagssugtoqidian Orogen and Rinkian Fold Belt of West Greenland have long been considered distinct orogenic belts separated by a zone of low or no Palaeoproterozoic strain in the intervening Disko Bugt region. New U-Pb geochronology confirms the continuity of Palaeoproterozoic deformation and metamorphism through this region, thereby directly linking the Nagssugtoqidian Orogen and Rinkian Fold Belt. Furthermore, two newly identified Archaean blocks in this region are interpreted to represent the southern and northern extensions of the Rae and North Atlantic cratons, respectively. Their boundary comprises a 15 km wide belt of distributed, NW-vergent ductile thrusts that deform ultramafic pods and is interpreted to represent the main collisonal suture of a single, variably exhumed, > 1100 km wide Nagssugtoqidian-Rinkian orogenic system. We conclude that Palaeoproterozoic convergence of a northern Archaean craton carried a south-facing passive margin sedimentary sequence (Karrat Group) towards a south-dipping subduction zone along the North Atlantic Craton. Terminal collision created a high-grade core centred on the magmatic arc of the central Nagssugtoqidian Orogen and a NW-vergent fold and thrust belt in the Rinkian Fold belt. Article in Journal/Newspaper Disko bugt Greenland North Atlantic University of Copenhagen: Research Greenland Hudson Rae ENVELOPE(-116.053,-116.053,62.834,62.834) Journal of the Geological Society 163 2 319 335 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
The parallel Trans-Hudson-aged Nagssugtoqidian Orogen and Rinkian Fold Belt of West Greenland have long been considered distinct orogenic belts separated by a zone of low or no Palaeoproterozoic strain in the intervening Disko Bugt region. New U-Pb geochronology confirms the continuity of Palaeoproterozoic deformation and metamorphism through this region, thereby directly linking the Nagssugtoqidian Orogen and Rinkian Fold Belt. Furthermore, two newly identified Archaean blocks in this region are interpreted to represent the southern and northern extensions of the Rae and North Atlantic cratons, respectively. Their boundary comprises a 15 km wide belt of distributed, NW-vergent ductile thrusts that deform ultramafic pods and is interpreted to represent the main collisonal suture of a single, variably exhumed, > 1100 km wide Nagssugtoqidian-Rinkian orogenic system. We conclude that Palaeoproterozoic convergence of a northern Archaean craton carried a south-facing passive margin sedimentary sequence (Karrat Group) towards a south-dipping subduction zone along the North Atlantic Craton. Terminal collision created a high-grade core centred on the magmatic arc of the central Nagssugtoqidian Orogen and a NW-vergent fold and thrust belt in the Rinkian Fold belt. |
format |
Article in Journal/Newspaper |
author |
Connelly, James N. Thrane, Kristine Krawiec, Adam W. Garde, Adam A. |
spellingShingle |
Connelly, James N. Thrane, Kristine Krawiec, Adam W. Garde, Adam A. Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland |
author_facet |
Connelly, James N. Thrane, Kristine Krawiec, Adam W. Garde, Adam A. |
author_sort |
Connelly, James N. |
title |
Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland |
title_short |
Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland |
title_full |
Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland |
title_fullStr |
Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland |
title_full_unstemmed |
Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland |
title_sort |
linking the palaeoproterozoic nagssugtoqidian and rinkian orogens through the disko bugt region of west greenland |
publishDate |
2006 |
url |
https://curis.ku.dk/portal/da/publications/linking-the-palaeoproterozoic-nagssugtoqidian-and-rinkian-orogens-through-the-disko-bugt-region-of-west-greenland(495f97de-d676-4bc1-86fa-6b46dd710c1e).html https://doi.org/10.1144/0016-764904-115 http://www.scopus.com/inward/record.url?scp=33644764904&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-116.053,-116.053,62.834,62.834) |
geographic |
Greenland Hudson Rae |
geographic_facet |
Greenland Hudson Rae |
genre |
Disko bugt Greenland North Atlantic |
genre_facet |
Disko bugt Greenland North Atlantic |
op_source |
Connelly , J N , Thrane , K , Krawiec , A W & Garde , A A 2006 , ' Linking the Palaeoproterozoic Nagssugtoqidian and Rinkian orogens through the Disko Bugt region of West Greenland ' , Journal of the Geological Society , vol. 163 , no. 2 , pp. 319-335 . https://doi.org/10.1144/0016-764904-115 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1144/0016-764904-115 |
container_title |
Journal of the Geological Society |
container_volume |
163 |
container_issue |
2 |
container_start_page |
319 |
op_container_end_page |
335 |
_version_ |
1766397093566480384 |