The Nagssugtoqidian Orogen of West Greenland: tectonic evolution and regional correlations from a West Greenland perspective
The Nagssugtoqidian Orogen of West Greenland represents a belt of Palaeoproterozoic deformation and metamorphism between the North Atlantic Craton of South Greenland and a northern, lesser known continental segment that includes the Rinkian Orogen. First-order observations are interpreted to support...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2002
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e02-027 http://www.nrcresearchpress.com/doi/pdf/10.1139/e02-027 |
id |
crcansciencepubl:10.1139/e02-027 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e02-027 2024-10-20T14:02:47+00:00 The Nagssugtoqidian Orogen of West Greenland: tectonic evolution and regional correlations from a West Greenland perspective van Gool, Jeroen A.M Connelly, James N Marker, Mogens Mengel, Flemming C 2002 http://dx.doi.org/10.1139/e02-027 http://www.nrcresearchpress.com/doi/pdf/10.1139/e02-027 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 39, issue 5, page 665-686 ISSN 0008-4077 1480-3313 journal-article 2002 crcansciencepubl https://doi.org/10.1139/e02-027 2024-09-27T04:07:25Z The Nagssugtoqidian Orogen of West Greenland represents a belt of Palaeoproterozoic deformation and metamorphism between the North Atlantic Craton of South Greenland and a northern, lesser known continental segment that includes the Rinkian Orogen. First-order observations are interpreted to support a cycle of separation, convergence, and eventual collision of two continental masses. The emplacement of the Kangâmiut dyke swarm marked the onset of continental breakup at ca. 2040 Ma, and sedimentary basins formed between ca. 1950 and 1920 Ma. Subsequent convergence and consumption of an oceanic plate caused arc magmatism at 19201870 Ma. Granulite-facies peak metamorphism at 18601840 Ma in the centre of the orogen is related to crustal thickening by WNW-directed thrusting. Large-scale, upright folding with an eastwest trend was ongoing by 1825 Ma. Sinistral strike-slip movement was concentrated along steeply dipping limbs of these large-scale folds and formed orogen-scale steep belts at ca. 1775 Ma. Close similarities between the northern and southern foreland suggest that the two cratons likely originated from one continuous continental block. Temporal and kinematic correlation of these events with adjoining orogens in Canada and Greenland shows close genetic links. The Nagssugtoqidian Orogen of West Greenland continues eastwards beneath the Greenland Ice cap to the Eastern Nagssugtoqidian belt of East Greenland (a.k.a. the Ammassalik belt). The Torngat Orogen of eastern Canada developed simultaneous with the Nagssugtoqidian Orogen with a kinematic compatibility suggesting that the two orogens formed on the west and north flanks, respectively, of a curved leading continental margin of an indenting North Atlantic Craton. Article in Journal/Newspaper Ammassalik East Greenland Greenland Ice cap North Atlantic Canadian Science Publishing Canada Greenland Canadian Journal of Earth Sciences 39 5 665 686 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The Nagssugtoqidian Orogen of West Greenland represents a belt of Palaeoproterozoic deformation and metamorphism between the North Atlantic Craton of South Greenland and a northern, lesser known continental segment that includes the Rinkian Orogen. First-order observations are interpreted to support a cycle of separation, convergence, and eventual collision of two continental masses. The emplacement of the Kangâmiut dyke swarm marked the onset of continental breakup at ca. 2040 Ma, and sedimentary basins formed between ca. 1950 and 1920 Ma. Subsequent convergence and consumption of an oceanic plate caused arc magmatism at 19201870 Ma. Granulite-facies peak metamorphism at 18601840 Ma in the centre of the orogen is related to crustal thickening by WNW-directed thrusting. Large-scale, upright folding with an eastwest trend was ongoing by 1825 Ma. Sinistral strike-slip movement was concentrated along steeply dipping limbs of these large-scale folds and formed orogen-scale steep belts at ca. 1775 Ma. Close similarities between the northern and southern foreland suggest that the two cratons likely originated from one continuous continental block. Temporal and kinematic correlation of these events with adjoining orogens in Canada and Greenland shows close genetic links. The Nagssugtoqidian Orogen of West Greenland continues eastwards beneath the Greenland Ice cap to the Eastern Nagssugtoqidian belt of East Greenland (a.k.a. the Ammassalik belt). The Torngat Orogen of eastern Canada developed simultaneous with the Nagssugtoqidian Orogen with a kinematic compatibility suggesting that the two orogens formed on the west and north flanks, respectively, of a curved leading continental margin of an indenting North Atlantic Craton. |
format |
Article in Journal/Newspaper |
author |
van Gool, Jeroen A.M Connelly, James N Marker, Mogens Mengel, Flemming C |
spellingShingle |
van Gool, Jeroen A.M Connelly, James N Marker, Mogens Mengel, Flemming C The Nagssugtoqidian Orogen of West Greenland: tectonic evolution and regional correlations from a West Greenland perspective |
author_facet |
van Gool, Jeroen A.M Connelly, James N Marker, Mogens Mengel, Flemming C |
author_sort |
van Gool, Jeroen A.M |
title |
The Nagssugtoqidian Orogen of West Greenland: tectonic evolution and regional correlations from a West Greenland perspective |
title_short |
The Nagssugtoqidian Orogen of West Greenland: tectonic evolution and regional correlations from a West Greenland perspective |
title_full |
The Nagssugtoqidian Orogen of West Greenland: tectonic evolution and regional correlations from a West Greenland perspective |
title_fullStr |
The Nagssugtoqidian Orogen of West Greenland: tectonic evolution and regional correlations from a West Greenland perspective |
title_full_unstemmed |
The Nagssugtoqidian Orogen of West Greenland: tectonic evolution and regional correlations from a West Greenland perspective |
title_sort |
nagssugtoqidian orogen of west greenland: tectonic evolution and regional correlations from a west greenland perspective |
publisher |
Canadian Science Publishing |
publishDate |
2002 |
url |
http://dx.doi.org/10.1139/e02-027 http://www.nrcresearchpress.com/doi/pdf/10.1139/e02-027 |
geographic |
Canada Greenland |
geographic_facet |
Canada Greenland |
genre |
Ammassalik East Greenland Greenland Ice cap North Atlantic |
genre_facet |
Ammassalik East Greenland Greenland Ice cap North Atlantic |
op_source |
Canadian Journal of Earth Sciences volume 39, issue 5, page 665-686 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e02-027 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
39 |
container_issue |
5 |
container_start_page |
665 |
op_container_end_page |
686 |
_version_ |
1813443231448301568 |