Zircon geochronology from the Kangaatsiaq–Qasigiannguit region, the northern part of the 1.9–1.8 Ga Nagssugtoqidian orogen, West Greenland
The Kangaatsiaq–Qasigiannguit region in the northern part of the Palaeoproterozoic Nagssugtoqidian orogen of West Greenland consists of poly-deformed orthogneisses and minor occurrences of interleaved, discontinuous supracrustal belts. Laser ablation ICP-MS 207Pb/206Pb analyses of detrital zircons f...
Published in: | Geological Survey of Denmark and Greenland (GEUS) Bulletin |
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Geological Survey of Denmark and Greenland (GEUS)
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Online Access: | https://geusbulletin.org/index.php/geusb/article/view/4918 https://doi.org/10.34194/geusb.v11.4918 |
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ftjgeusbullet:oai:geusjournals.org:article/4918 2023-05-15T15:54:17+02:00 Zircon geochronology from the Kangaatsiaq–Qasigiannguit region, the northern part of the 1.9–1.8 Ga Nagssugtoqidian orogen, West Greenland Thrane, Kristine Connelly, James N. 2006-12-05 application/pdf https://geusbulletin.org/index.php/geusb/article/view/4918 https://doi.org/10.34194/geusb.v11.4918 eng eng Geological Survey of Denmark and Greenland (GEUS) https://geusbulletin.org/index.php/geusb/article/view/4918/10585 https://geusbulletin.org/index.php/geusb/article/view/4918 doi:10.34194/geusb.v11.4918 GEUS Bulletin; Vol. 11 (2006): Precambrian crustal evolution and Cretaceous-Palaeogene faulting in West Greenland; 87-100 2597-2154 2597-2162 Nagssugtoqidian orogen deformation LA-ICP-MS zircon metasediment info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article. 2006 ftjgeusbullet https://doi.org/10.34194/geusb.v11.4918 2022-03-15T17:22:19Z The Kangaatsiaq–Qasigiannguit region in the northern part of the Palaeoproterozoic Nagssugtoqidian orogen of West Greenland consists of poly-deformed orthogneisses and minor occurrences of interleaved, discontinuous supracrustal belts. Laser ablation ICP-MS 207Pb/206Pb analyses of detrital zircons from four metasedimentary rocks (supplemented by ion probe analysis of one sample) and igneous zircons from six granitoid rocks cutting metasedimentary units indicate that the supracrustal rocks in the Kangaatsiaq–Qasigiannguit (Christianshåb) region are predominantly Archaean in age. Four occurrences of metasedimentary rocks are clearly Archaean, two have equivocal ages, and only one metasedimentary unit, from within the Naternaq (Lersletten) supracrustal belt, is demonstrably Palaeoproterozoic and readily defines a large fold complex of this age at Naternaq. The 2.9–2.8 Ga ages of detrital Archaean grains are compatible with derivation from the local basement orthogneisses within the Nagssugtoqidian orogen. The detrital age patterns are similar to those of metasediments within the central Nagssugtoqidian orogen but distinct from age patterns in metasediments of the Rinkian belt to the north, where there is an additional component of pre-2.9 Ga zircons. Synkinematic intrusive granitoid rocks constrain the ages of some Archaean deformation at 2748 ± 19 Ma and some Palaeoproterozoic deformation at 1837 ± 12 Ma. Article in Journal/Newspaper Christianshåb Greenland Kangaatsiaq Qasigiannguit GEUS Bulletin (Geological Survey of Denmark and Greenland) Greenland Kangaatsiaq ENVELOPE(-53.464,-53.464,68.306,68.306) Naternaq ENVELOPE(-51.883,-51.883,68.333,68.333) Qasigiannguit ENVELOPE(-51.192,-51.192,68.819,68.819) Geological Survey of Denmark and Greenland (GEUS) Bulletin 11 87 100 |
institution |
Open Polar |
collection |
GEUS Bulletin (Geological Survey of Denmark and Greenland) |
op_collection_id |
ftjgeusbullet |
language |
English |
topic |
Nagssugtoqidian orogen deformation LA-ICP-MS zircon metasediment |
spellingShingle |
Nagssugtoqidian orogen deformation LA-ICP-MS zircon metasediment Thrane, Kristine Connelly, James N. Zircon geochronology from the Kangaatsiaq–Qasigiannguit region, the northern part of the 1.9–1.8 Ga Nagssugtoqidian orogen, West Greenland |
topic_facet |
Nagssugtoqidian orogen deformation LA-ICP-MS zircon metasediment |
description |
The Kangaatsiaq–Qasigiannguit region in the northern part of the Palaeoproterozoic Nagssugtoqidian orogen of West Greenland consists of poly-deformed orthogneisses and minor occurrences of interleaved, discontinuous supracrustal belts. Laser ablation ICP-MS 207Pb/206Pb analyses of detrital zircons from four metasedimentary rocks (supplemented by ion probe analysis of one sample) and igneous zircons from six granitoid rocks cutting metasedimentary units indicate that the supracrustal rocks in the Kangaatsiaq–Qasigiannguit (Christianshåb) region are predominantly Archaean in age. Four occurrences of metasedimentary rocks are clearly Archaean, two have equivocal ages, and only one metasedimentary unit, from within the Naternaq (Lersletten) supracrustal belt, is demonstrably Palaeoproterozoic and readily defines a large fold complex of this age at Naternaq. The 2.9–2.8 Ga ages of detrital Archaean grains are compatible with derivation from the local basement orthogneisses within the Nagssugtoqidian orogen. The detrital age patterns are similar to those of metasediments within the central Nagssugtoqidian orogen but distinct from age patterns in metasediments of the Rinkian belt to the north, where there is an additional component of pre-2.9 Ga zircons. Synkinematic intrusive granitoid rocks constrain the ages of some Archaean deformation at 2748 ± 19 Ma and some Palaeoproterozoic deformation at 1837 ± 12 Ma. |
format |
Article in Journal/Newspaper |
author |
Thrane, Kristine Connelly, James N. |
author_facet |
Thrane, Kristine Connelly, James N. |
author_sort |
Thrane, Kristine |
title |
Zircon geochronology from the Kangaatsiaq–Qasigiannguit region, the northern part of the 1.9–1.8 Ga Nagssugtoqidian orogen, West Greenland |
title_short |
Zircon geochronology from the Kangaatsiaq–Qasigiannguit region, the northern part of the 1.9–1.8 Ga Nagssugtoqidian orogen, West Greenland |
title_full |
Zircon geochronology from the Kangaatsiaq–Qasigiannguit region, the northern part of the 1.9–1.8 Ga Nagssugtoqidian orogen, West Greenland |
title_fullStr |
Zircon geochronology from the Kangaatsiaq–Qasigiannguit region, the northern part of the 1.9–1.8 Ga Nagssugtoqidian orogen, West Greenland |
title_full_unstemmed |
Zircon geochronology from the Kangaatsiaq–Qasigiannguit region, the northern part of the 1.9–1.8 Ga Nagssugtoqidian orogen, West Greenland |
title_sort |
zircon geochronology from the kangaatsiaq–qasigiannguit region, the northern part of the 1.9–1.8 ga nagssugtoqidian orogen, west greenland |
publisher |
Geological Survey of Denmark and Greenland (GEUS) |
publishDate |
2006 |
url |
https://geusbulletin.org/index.php/geusb/article/view/4918 https://doi.org/10.34194/geusb.v11.4918 |
long_lat |
ENVELOPE(-53.464,-53.464,68.306,68.306) ENVELOPE(-51.883,-51.883,68.333,68.333) ENVELOPE(-51.192,-51.192,68.819,68.819) |
geographic |
Greenland Kangaatsiaq Naternaq Qasigiannguit |
geographic_facet |
Greenland Kangaatsiaq Naternaq Qasigiannguit |
genre |
Christianshåb Greenland Kangaatsiaq Qasigiannguit |
genre_facet |
Christianshåb Greenland Kangaatsiaq Qasigiannguit |
op_source |
GEUS Bulletin; Vol. 11 (2006): Precambrian crustal evolution and Cretaceous-Palaeogene faulting in West Greenland; 87-100 2597-2154 2597-2162 |
op_relation |
https://geusbulletin.org/index.php/geusb/article/view/4918/10585 https://geusbulletin.org/index.php/geusb/article/view/4918 doi:10.34194/geusb.v11.4918 |
op_doi |
https://doi.org/10.34194/geusb.v11.4918 |
container_title |
Geological Survey of Denmark and Greenland (GEUS) Bulletin |
container_volume |
11 |
container_start_page |
87 |
op_container_end_page |
100 |
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1766389461465169920 |