Low-pressure metamorphism during Archaean crustal growth: a low-strain zone in the northern Nagssugtoqidian orogen, West Greenland
One of the first detailed accounts of Precambrian supracrustal rocks in central West Greenland came from a small group of islands and skerries a few kilometres north-east of Aasiaat (Fig. 1). In 1948, K. Ellitsgaard-Rasmussen spent a few days on the islands and published a metamorphic study of their...
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ftjgeusbullet:oai:geusjournals.org:article/4789 2023-05-15T12:58:30+02:00 Low-pressure metamorphism during Archaean crustal growth: a low-strain zone in the northern Nagssugtoqidian orogen, West Greenland Garde, Adam A. Christiansen, Mads Sylvest Hollis, Julie A. Mazur, Stanislaw van Gool, Jeroen A.M. 2004-07-20 application/pdf https://geusbulletin.org/index.php/geusb/article/view/4789 https://doi.org/10.34194/geusb.v4.4789 eng eng Geological Survey of Denmark and Greenland (GEUS) https://geusbulletin.org/index.php/geusb/article/view/4789/10428 https://geusbulletin.org/index.php/geusb/article/view/4789 doi:10.34194/geusb.v4.4789 GEUS Bulletin; Vol. 4 (2004): Review of Survey activities 2003; 73-77 2597-2154 2597-2162 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Rapid Communication. Peer-reviewed Article. 2004 ftjgeusbullet https://doi.org/10.34194/geusb.v4.4789 2022-03-15T17:22:15Z One of the first detailed accounts of Precambrian supracrustal rocks in central West Greenland came from a small group of islands and skerries a few kilometres north-east of Aasiaat (Fig. 1). In 1948, K. Ellitsgaard-Rasmussen spent a few days on the islands and published a metamorphic study of their low-grade greenstones and aluminous clastic rocks (Ellitsgaard-Rasmussen 1954). He observed a striking dissimilarity between these supracrustal rocks and the grey gneisses found in most of the Aasiaat region, although the latter were at that time also assumed to be of supracrustal origin. He furthermore noted that the regional significance of the islands should be pursued, and that the island of Maniitsoq 4 km west of the small islands might hold a key to their interpretation. More than 50 years were to elapse before the islands were surveyed again in July 2003, during field work for the Ikamiut map sheet in the northern Nagssugtoqidian orogen (van Gool et al. 2002). The collision of two Archaean continents during the c. 1850 Ma Nagssugtoqidian orogeny caused intensive structural and thermal reworking at up to granulite facies grade in most of central West Greenland; see Connelly et al. (2000) and van Gool et al. (2002). The small islands north-east of Aasiaat are indeed regionally important, because they document a previously unrecognised low-grade, low-strain domain of presumed Archaean age that has largely escaped the Nagssugtoqidian orogeny, and as predicted by Ellitsgaard-Rasmussen (1954) a clue to their significance was found on Maniitsoq. Article in Journal/Newspaper Aasiaat Greenland Ikamiut Maniitsoq GEUS Bulletin (Geological Survey of Denmark and Greenland) Greenland Rasmussen ENVELOPE(-64.084,-64.084,-65.248,-65.248) Maniitsoq ENVELOPE(-55.217,-55.217,72.967,72.967) Aasiaat ENVELOPE(-52.800,-52.800,68.700,68.700) Geological Survey of Denmark and Greenland (GEUS) Bulletin 4 73 77 |
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GEUS Bulletin (Geological Survey of Denmark and Greenland) |
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ftjgeusbullet |
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English |
description |
One of the first detailed accounts of Precambrian supracrustal rocks in central West Greenland came from a small group of islands and skerries a few kilometres north-east of Aasiaat (Fig. 1). In 1948, K. Ellitsgaard-Rasmussen spent a few days on the islands and published a metamorphic study of their low-grade greenstones and aluminous clastic rocks (Ellitsgaard-Rasmussen 1954). He observed a striking dissimilarity between these supracrustal rocks and the grey gneisses found in most of the Aasiaat region, although the latter were at that time also assumed to be of supracrustal origin. He furthermore noted that the regional significance of the islands should be pursued, and that the island of Maniitsoq 4 km west of the small islands might hold a key to their interpretation. More than 50 years were to elapse before the islands were surveyed again in July 2003, during field work for the Ikamiut map sheet in the northern Nagssugtoqidian orogen (van Gool et al. 2002). The collision of two Archaean continents during the c. 1850 Ma Nagssugtoqidian orogeny caused intensive structural and thermal reworking at up to granulite facies grade in most of central West Greenland; see Connelly et al. (2000) and van Gool et al. (2002). The small islands north-east of Aasiaat are indeed regionally important, because they document a previously unrecognised low-grade, low-strain domain of presumed Archaean age that has largely escaped the Nagssugtoqidian orogeny, and as predicted by Ellitsgaard-Rasmussen (1954) a clue to their significance was found on Maniitsoq. |
format |
Article in Journal/Newspaper |
author |
Garde, Adam A. Christiansen, Mads Sylvest Hollis, Julie A. Mazur, Stanislaw van Gool, Jeroen A.M. |
spellingShingle |
Garde, Adam A. Christiansen, Mads Sylvest Hollis, Julie A. Mazur, Stanislaw van Gool, Jeroen A.M. Low-pressure metamorphism during Archaean crustal growth: a low-strain zone in the northern Nagssugtoqidian orogen, West Greenland |
author_facet |
Garde, Adam A. Christiansen, Mads Sylvest Hollis, Julie A. Mazur, Stanislaw van Gool, Jeroen A.M. |
author_sort |
Garde, Adam A. |
title |
Low-pressure metamorphism during Archaean crustal growth: a low-strain zone in the northern Nagssugtoqidian orogen, West Greenland |
title_short |
Low-pressure metamorphism during Archaean crustal growth: a low-strain zone in the northern Nagssugtoqidian orogen, West Greenland |
title_full |
Low-pressure metamorphism during Archaean crustal growth: a low-strain zone in the northern Nagssugtoqidian orogen, West Greenland |
title_fullStr |
Low-pressure metamorphism during Archaean crustal growth: a low-strain zone in the northern Nagssugtoqidian orogen, West Greenland |
title_full_unstemmed |
Low-pressure metamorphism during Archaean crustal growth: a low-strain zone in the northern Nagssugtoqidian orogen, West Greenland |
title_sort |
low-pressure metamorphism during archaean crustal growth: a low-strain zone in the northern nagssugtoqidian orogen, west greenland |
publisher |
Geological Survey of Denmark and Greenland (GEUS) |
publishDate |
2004 |
url |
https://geusbulletin.org/index.php/geusb/article/view/4789 https://doi.org/10.34194/geusb.v4.4789 |
long_lat |
ENVELOPE(-64.084,-64.084,-65.248,-65.248) ENVELOPE(-55.217,-55.217,72.967,72.967) ENVELOPE(-52.800,-52.800,68.700,68.700) |
geographic |
Greenland Rasmussen Maniitsoq Aasiaat |
geographic_facet |
Greenland Rasmussen Maniitsoq Aasiaat |
genre |
Aasiaat Greenland Ikamiut Maniitsoq |
genre_facet |
Aasiaat Greenland Ikamiut Maniitsoq |
op_source |
GEUS Bulletin; Vol. 4 (2004): Review of Survey activities 2003; 73-77 2597-2154 2597-2162 |
op_relation |
https://geusbulletin.org/index.php/geusb/article/view/4789/10428 https://geusbulletin.org/index.php/geusb/article/view/4789 doi:10.34194/geusb.v4.4789 |
op_doi |
https://doi.org/10.34194/geusb.v4.4789 |
container_title |
Geological Survey of Denmark and Greenland (GEUS) Bulletin |
container_volume |
4 |
container_start_page |
73 |
op_container_end_page |
77 |
_version_ |
1766250571287756800 |