Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland
The Ministry of Mineral Resources and Labour, Greenland Government supported field and analytical work. NJG acknowledges support from Australian Research Council grant FL160100168. Different geodynamic models exist for the growth and differentiation of Archean continental crust, ranging from horizon...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/19439 2023-07-02T03:32:25+02:00 Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland Yakymchuk, C. Kirkland, C. L. Hollis, J. A. Kendrick, J. Gardiner, N. J. Szilas, K. University of St Andrews. School of Earth & Environmental Sciences 2020-02-10T12:30:07Z application/pdf http://hdl.handle.net/10023/19439 https://doi.org/10.1016/j.precamres.2020.105615 http://www.scopus.com/inward/record.url?scp=85078871723&partnerID=8YFLogxK eng eng Precambrian Research Yakymchuk , C , Kirkland , C L , Hollis , J A , Kendrick , J , Gardiner , N J & Szilas , K 2020 , ' Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland ' , Precambrian Research , vol. 339 , 105615 . https://doi.org/10.1016/j.precamres.2020.105615 0301-9268 PURE: 265683201 PURE UUID: 97b235c4-8b0c-40e2-baf8-29657572b22e RIS: urn:AC1B649C2885E8BB3713FAC3AB0B7D37 ORCID: /0000-0003-3465-9295/work/67526240 Scopus: 85078871723 WOS: 000517852000007 http://hdl.handle.net/10023/19439 https://doi.org/10.1016/j.precamres.2020.105615 http://www.scopus.com/inward/record.url?scp=85078871723&partnerID=8YFLogxK Copyright © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/). Zircon North Atlantic Craton Granulite Pseudosection Partial melting GE Environmental Sciences Geology Geochemistry and Petrology DAS GE Journal article 2020 ftstandrewserep https://doi.org/10.1016/j.precamres.2020.105615 2023-06-13T18:26:28Z The Ministry of Mineral Resources and Labour, Greenland Government supported field and analytical work. NJG acknowledges support from Australian Research Council grant FL160100168. Different geodynamic models exist for the growth and differentiation of Archean continental crust, ranging from horizontal tectonics with subduction zones to vertical tectonics with foundering of greenstone sequences. U–Pb zircon geochronology, field relationships, and pressure–temperature constraints from granulite-facies metabasite of the Akia Terrane of the North Atlantic Craton in West Greenland show that this terrane grew through two major magmatic growth episodes: an earlier one at c. 3.2 Ga, and a later one at c. 3.05–2.97 Ga. Phase equilibrium modelling for assemblages related to the latter indicates temperatures of >800 °C at <0.9 GPa, consistent with a high apparent geothermal gradient and implies thin crust. Granulite-facies metamorphism and partial melting occurred in the absence of pervasive ductile deformation as indicated by nebulitic, undeformed pyroxene-bearing leucosome in metabasite gneiss. Trace element modelling suggests that c. 3.0 Ga tonalite at the current exposure level in the Akia Terrane was generated at pressures of >0.8 GPa in the stability field of garnet. U–Pb zircon geochronology and existing Hf isotope data are also consistent with a model involving protracted Mesoarchean magmatic growth with limited mantle addition during a prolonged period of high temperatures in a relatively stagnant tectonic regime prior to Neoarchean compressional tectonism in the Akia Terrane. Publisher PDF Peer reviewed Article in Journal/Newspaper Greenland North Atlantic University of St Andrews: Digital Research Repository Greenland Precambrian Research 339 105615 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Zircon North Atlantic Craton Granulite Pseudosection Partial melting GE Environmental Sciences Geology Geochemistry and Petrology DAS GE |
spellingShingle |
Zircon North Atlantic Craton Granulite Pseudosection Partial melting GE Environmental Sciences Geology Geochemistry and Petrology DAS GE Yakymchuk, C. Kirkland, C. L. Hollis, J. A. Kendrick, J. Gardiner, N. J. Szilas, K. Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland |
topic_facet |
Zircon North Atlantic Craton Granulite Pseudosection Partial melting GE Environmental Sciences Geology Geochemistry and Petrology DAS GE |
description |
The Ministry of Mineral Resources and Labour, Greenland Government supported field and analytical work. NJG acknowledges support from Australian Research Council grant FL160100168. Different geodynamic models exist for the growth and differentiation of Archean continental crust, ranging from horizontal tectonics with subduction zones to vertical tectonics with foundering of greenstone sequences. U–Pb zircon geochronology, field relationships, and pressure–temperature constraints from granulite-facies metabasite of the Akia Terrane of the North Atlantic Craton in West Greenland show that this terrane grew through two major magmatic growth episodes: an earlier one at c. 3.2 Ga, and a later one at c. 3.05–2.97 Ga. Phase equilibrium modelling for assemblages related to the latter indicates temperatures of >800 °C at <0.9 GPa, consistent with a high apparent geothermal gradient and implies thin crust. Granulite-facies metamorphism and partial melting occurred in the absence of pervasive ductile deformation as indicated by nebulitic, undeformed pyroxene-bearing leucosome in metabasite gneiss. Trace element modelling suggests that c. 3.0 Ga tonalite at the current exposure level in the Akia Terrane was generated at pressures of >0.8 GPa in the stability field of garnet. U–Pb zircon geochronology and existing Hf isotope data are also consistent with a model involving protracted Mesoarchean magmatic growth with limited mantle addition during a prolonged period of high temperatures in a relatively stagnant tectonic regime prior to Neoarchean compressional tectonism in the Akia Terrane. Publisher PDF Peer reviewed |
author2 |
University of St Andrews. School of Earth & Environmental Sciences |
format |
Article in Journal/Newspaper |
author |
Yakymchuk, C. Kirkland, C. L. Hollis, J. A. Kendrick, J. Gardiner, N. J. Szilas, K. |
author_facet |
Yakymchuk, C. Kirkland, C. L. Hollis, J. A. Kendrick, J. Gardiner, N. J. Szilas, K. |
author_sort |
Yakymchuk, C. |
title |
Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland |
title_short |
Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland |
title_full |
Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland |
title_fullStr |
Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland |
title_full_unstemmed |
Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland |
title_sort |
mesoarchean partial melting of mafic crust and tonalite production during high-t–low-p stagnant tectonism, akia terrane, west greenland |
publishDate |
2020 |
url |
http://hdl.handle.net/10023/19439 https://doi.org/10.1016/j.precamres.2020.105615 http://www.scopus.com/inward/record.url?scp=85078871723&partnerID=8YFLogxK |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_relation |
Precambrian Research Yakymchuk , C , Kirkland , C L , Hollis , J A , Kendrick , J , Gardiner , N J & Szilas , K 2020 , ' Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland ' , Precambrian Research , vol. 339 , 105615 . https://doi.org/10.1016/j.precamres.2020.105615 0301-9268 PURE: 265683201 PURE UUID: 97b235c4-8b0c-40e2-baf8-29657572b22e RIS: urn:AC1B649C2885E8BB3713FAC3AB0B7D37 ORCID: /0000-0003-3465-9295/work/67526240 Scopus: 85078871723 WOS: 000517852000007 http://hdl.handle.net/10023/19439 https://doi.org/10.1016/j.precamres.2020.105615 http://www.scopus.com/inward/record.url?scp=85078871723&partnerID=8YFLogxK |
op_rights |
Copyright © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/). |
op_doi |
https://doi.org/10.1016/j.precamres.2020.105615 |
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Precambrian Research |
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339 |
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