Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and >3600Ma Isukasia terrane continental crust (Greenland)
The Mesoarchaean Kapisilik and Eoarchaean Isukasia terranes in the Nuuk region of southern West Greenland were tectonically juxtaposed in the Archaean. The north of the Isukasia terrane is distal from the Kapisilik terrane and has only rare growth of ~2690Ma metamorphic zircon and no 2980-2950Ma met...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/64032 2024-01-14T10:07:19+01:00 Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and >3600Ma Isukasia terrane continental crust (Greenland) Nutman, Allen P Bennett, Victoria Friend, Clark Yi, Keewook Lee, Seung Ryeol http://hdl.handle.net/1885/64032 https://doi.org/10.1016/j.precamres.2014.12.013 https://openresearch-repository.anu.edu.au/bitstream/1885/64032/5/01_Nutman_Mesoarchaean_collision_of_2015.pdf.jpg unknown Elsevier 0301-9268 http://hdl.handle.net/1885/64032 doi:10.1016/j.precamres.2014.12.013 https://openresearch-repository.anu.edu.au/bitstream/1885/64032/5/01_Nutman_Mesoarchaean_collision_of_2015.pdf.jpg Precambrian Research Journal article ftanucanberra https://doi.org/10.1016/j.precamres.2014.12.013 2023-12-15T09:38:29Z The Mesoarchaean Kapisilik and Eoarchaean Isukasia terranes in the Nuuk region of southern West Greenland were tectonically juxtaposed in the Archaean. The north of the Isukasia terrane is distal from the Kapisilik terrane and has only rare growth of ~2690Ma metamorphic zircon and no 2980-2950Ma metamorphic zircon. The southern part of the Isukasia terrane lies between two ~2690Ma shear zones, and has locally preserved high pressure granulite facies assemblages and widespread growth of 2980-2950Ma metamorphic zircon and also sporadic growth of ~2690Ma metamorphic zircon. Within this southern part of the Isukasia terrane there is a folded klippe of mylonitised Mesoarchaean detrital meta-sedimentary rocks (carrying >3600 and ~3070Ma detrital zircons), mafic and ultramafic rocks, with ~2970Ma metamorphic zircon overgrowths. South of the Isukasia terrane is the Kapisilik terrane, containing ~3070Ma arc-related volcanic rocks, gabbro-anorthosites and meta-tonalites, intruded by 2970-2960Ma granites. Zircons of an Ivisârtoq supracrustal belt ~3075Ma intermediate volcanic rock have initial e{open}Hf values of +2 to +5 thus are juvenile crustal additions. ~3070Ma tonalites along the northern edge of the Kapisilik terrane have whole rock positive initial e{open}Nd values and thus are also juvenile crustal additions. In contrast, igneous zircons in 2960Ma granites intruded into juvenile ~3075Ma supracrustal rocks of the Kapisilik terrane have initial e{open}Hf values of -5 to -10, and must have involved the partial melting of >3600Ma Isukasia terrane rocks.The integrated structural and zircon U-Th-Pb-Hf isotopic data show that at 2980-2950. Ma the Kapisilik terrane juvenile arc components collided with, and over-rid, the Isukasia terrane. The southern edge of the Isukasia terrane came to lie in the deep crust under the Ivisârtoq supracrustal belt and melted at 2970-2960. Ma to produce granites. These granites derived from ancient crust rose into the upper crust, where they intruded the overlying allochthonous ... Article in Journal/Newspaper Greenland Nuuk Australian National University: ANU Digital Collections Greenland Nuuk ENVELOPE(-52.150,-52.150,68.717,68.717) Precambrian Research 258 146 160 |
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Open Polar |
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Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
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unknown |
description |
The Mesoarchaean Kapisilik and Eoarchaean Isukasia terranes in the Nuuk region of southern West Greenland were tectonically juxtaposed in the Archaean. The north of the Isukasia terrane is distal from the Kapisilik terrane and has only rare growth of ~2690Ma metamorphic zircon and no 2980-2950Ma metamorphic zircon. The southern part of the Isukasia terrane lies between two ~2690Ma shear zones, and has locally preserved high pressure granulite facies assemblages and widespread growth of 2980-2950Ma metamorphic zircon and also sporadic growth of ~2690Ma metamorphic zircon. Within this southern part of the Isukasia terrane there is a folded klippe of mylonitised Mesoarchaean detrital meta-sedimentary rocks (carrying >3600 and ~3070Ma detrital zircons), mafic and ultramafic rocks, with ~2970Ma metamorphic zircon overgrowths. South of the Isukasia terrane is the Kapisilik terrane, containing ~3070Ma arc-related volcanic rocks, gabbro-anorthosites and meta-tonalites, intruded by 2970-2960Ma granites. Zircons of an Ivisârtoq supracrustal belt ~3075Ma intermediate volcanic rock have initial e{open}Hf values of +2 to +5 thus are juvenile crustal additions. ~3070Ma tonalites along the northern edge of the Kapisilik terrane have whole rock positive initial e{open}Nd values and thus are also juvenile crustal additions. In contrast, igneous zircons in 2960Ma granites intruded into juvenile ~3075Ma supracrustal rocks of the Kapisilik terrane have initial e{open}Hf values of -5 to -10, and must have involved the partial melting of >3600Ma Isukasia terrane rocks.The integrated structural and zircon U-Th-Pb-Hf isotopic data show that at 2980-2950. Ma the Kapisilik terrane juvenile arc components collided with, and over-rid, the Isukasia terrane. The southern edge of the Isukasia terrane came to lie in the deep crust under the Ivisârtoq supracrustal belt and melted at 2970-2960. Ma to produce granites. These granites derived from ancient crust rose into the upper crust, where they intruded the overlying allochthonous ... |
format |
Article in Journal/Newspaper |
author |
Nutman, Allen P Bennett, Victoria Friend, Clark Yi, Keewook Lee, Seung Ryeol |
spellingShingle |
Nutman, Allen P Bennett, Victoria Friend, Clark Yi, Keewook Lee, Seung Ryeol Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and >3600Ma Isukasia terrane continental crust (Greenland) |
author_facet |
Nutman, Allen P Bennett, Victoria Friend, Clark Yi, Keewook Lee, Seung Ryeol |
author_sort |
Nutman, Allen P |
title |
Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and >3600Ma Isukasia terrane continental crust (Greenland) |
title_short |
Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and >3600Ma Isukasia terrane continental crust (Greenland) |
title_full |
Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and >3600Ma Isukasia terrane continental crust (Greenland) |
title_fullStr |
Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and >3600Ma Isukasia terrane continental crust (Greenland) |
title_full_unstemmed |
Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and >3600Ma Isukasia terrane continental crust (Greenland) |
title_sort |
mesoarchaean collision of kapisilik terrane 3070ma juvenile arc rocks and >3600ma isukasia terrane continental crust (greenland) |
publisher |
Elsevier |
url |
http://hdl.handle.net/1885/64032 https://doi.org/10.1016/j.precamres.2014.12.013 https://openresearch-repository.anu.edu.au/bitstream/1885/64032/5/01_Nutman_Mesoarchaean_collision_of_2015.pdf.jpg |
long_lat |
ENVELOPE(-52.150,-52.150,68.717,68.717) |
geographic |
Greenland Nuuk |
geographic_facet |
Greenland Nuuk |
genre |
Greenland Nuuk |
genre_facet |
Greenland Nuuk |
op_source |
Precambrian Research |
op_relation |
0301-9268 http://hdl.handle.net/1885/64032 doi:10.1016/j.precamres.2014.12.013 https://openresearch-repository.anu.edu.au/bitstream/1885/64032/5/01_Nutman_Mesoarchaean_collision_of_2015.pdf.jpg |
op_doi |
https://doi.org/10.1016/j.precamres.2014.12.013 |
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Precambrian Research |
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258 |
container_start_page |
146 |
op_container_end_page |
160 |
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1788061726975983616 |