Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland
The Maniitsoq project is supported by the Ministry of Mineral Resources and Labour, Government of Greenland. NJG thanks Curtin University and Australian Research Council grant FL160100168 for financial support. Constraining the source, genesis, and evolution of Archaean felsic crust is key to unders...
Published in: | Contributions to Mineralogy and Petrology |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/18486 2023-07-02T03:32:25+02:00 Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland Gardiner, N. J. Kirkland, C. L. Hollis, J. Szilas, K. Steenfelt, A. Yakymchuk, C. Heide-Jørgensen, H. University of St Andrews. School of Earth & Environmental Sciences 2019-09-17T12:30:03Z application/pdf http://hdl.handle.net/10023/18486 https://doi.org/10.1007/s00410-019-1554-x eng eng Contributions to Mineralogy and Petrology Gardiner , N J , Kirkland , C L , Hollis , J , Szilas , K , Steenfelt , A , Yakymchuk , C & Heide-Jørgensen , H 2019 , ' Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland ' , Contributions to Mineralogy and Petrology , vol. 174 , 20 . https://doi.org/10.1007/s00410-019-1554-x 0010-7999 PURE: 261214853 PURE UUID: 594bd0ab-9e41-4d53-90dd-e67fdaf88010 Scopus: 85062077374 ORCID: /0000-0003-3465-9295/work/62311885 http://hdl.handle.net/10023/18486 https://doi.org/10.1007/s00410-019-1554-x Copyright © The Author(s) 2019. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Archean Hf isotope evolution North Atlantic Craton Partial melting anatexis TTG QE Geology GE Environmental Sciences Geophysics Geochemistry and Petrology DAS QE GE Journal article 2019 ftstandrewserep https://doi.org/10.1007/s00410-019-1554-x 2023-06-13T18:26:38Z The Maniitsoq project is supported by the Ministry of Mineral Resources and Labour, Government of Greenland. NJG thanks Curtin University and Australian Research Council grant FL160100168 for financial support. Constraining the source, genesis, and evolution of Archaean felsic crust is key to understanding the growth and stabilization of cratons. The Akia Terrane, part of the North Atlantic Craton, West Greenland, is comprised of Meso-to-Neoarchaean orthogneiss, with associated supracrustal rocks. We report zircon U–Pb and Lu–Hf isotope data, and whole-rock geochemistry, from samples of gneiss and supracrustals from the northern Akia Terrane, including from the Finnefjeld Orthogneiss Complex, which has recently been interpreted as an impact structure. Isotope data record two major episodes of continental crust production at ca. 3.2 and 3.0 Ga. Minor ca. 2.7 and 2.5 Ga magmatic events have more evolved εHf, interpreted as reworking of existing crust perhaps linked to terrane assembly. Felsic rocks from the Finnefjeld Orthogneiss Complex were derived from the same source at the same time as the surrounding tonalites, but from shallower melting, requiring any bolide-driven melting event to have occurred almost simultaneously alongside the production of the surrounding crust. A simpler alternative has the Finnefjeld Complex and surrounding tonalite representing the coeval genesis of evolved crust over a substantial lithospheric depth. Hafnium isotope data from the two major Mesoarchaean crust-forming episodes record a contribution from older mafic Eoarchaean crust. Invoking the involvement of an Eoarchaean root in the growth of younger Mesoarchaean crust puts important constraints on geodynamic models of the formation of the discrete terranes that ultimately assembled to form Earth’s cratons. Publisher PDF Peer reviewed Article in Journal/Newspaper Greenland Maniitsoq North Atlantic University of St Andrews: Digital Research Repository Finnefjeld ENVELOPE(-52.133,-52.133,65.267,65.267) Greenland Maniitsoq ENVELOPE(-55.217,-55.217,72.967,72.967) Contributions to Mineralogy and Petrology 174 3 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Archean Hf isotope evolution North Atlantic Craton Partial melting anatexis TTG QE Geology GE Environmental Sciences Geophysics Geochemistry and Petrology DAS QE GE |
spellingShingle |
Archean Hf isotope evolution North Atlantic Craton Partial melting anatexis TTG QE Geology GE Environmental Sciences Geophysics Geochemistry and Petrology DAS QE GE Gardiner, N. J. Kirkland, C. L. Hollis, J. Szilas, K. Steenfelt, A. Yakymchuk, C. Heide-Jørgensen, H. Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland |
topic_facet |
Archean Hf isotope evolution North Atlantic Craton Partial melting anatexis TTG QE Geology GE Environmental Sciences Geophysics Geochemistry and Petrology DAS QE GE |
description |
The Maniitsoq project is supported by the Ministry of Mineral Resources and Labour, Government of Greenland. NJG thanks Curtin University and Australian Research Council grant FL160100168 for financial support. Constraining the source, genesis, and evolution of Archaean felsic crust is key to understanding the growth and stabilization of cratons. The Akia Terrane, part of the North Atlantic Craton, West Greenland, is comprised of Meso-to-Neoarchaean orthogneiss, with associated supracrustal rocks. We report zircon U–Pb and Lu–Hf isotope data, and whole-rock geochemistry, from samples of gneiss and supracrustals from the northern Akia Terrane, including from the Finnefjeld Orthogneiss Complex, which has recently been interpreted as an impact structure. Isotope data record two major episodes of continental crust production at ca. 3.2 and 3.0 Ga. Minor ca. 2.7 and 2.5 Ga magmatic events have more evolved εHf, interpreted as reworking of existing crust perhaps linked to terrane assembly. Felsic rocks from the Finnefjeld Orthogneiss Complex were derived from the same source at the same time as the surrounding tonalites, but from shallower melting, requiring any bolide-driven melting event to have occurred almost simultaneously alongside the production of the surrounding crust. A simpler alternative has the Finnefjeld Complex and surrounding tonalite representing the coeval genesis of evolved crust over a substantial lithospheric depth. Hafnium isotope data from the two major Mesoarchaean crust-forming episodes record a contribution from older mafic Eoarchaean crust. Invoking the involvement of an Eoarchaean root in the growth of younger Mesoarchaean crust puts important constraints on geodynamic models of the formation of the discrete terranes that ultimately assembled to form Earth’s cratons. Publisher PDF Peer reviewed |
author2 |
University of St Andrews. School of Earth & Environmental Sciences |
format |
Article in Journal/Newspaper |
author |
Gardiner, N. J. Kirkland, C. L. Hollis, J. Szilas, K. Steenfelt, A. Yakymchuk, C. Heide-Jørgensen, H. |
author_facet |
Gardiner, N. J. Kirkland, C. L. Hollis, J. Szilas, K. Steenfelt, A. Yakymchuk, C. Heide-Jørgensen, H. |
author_sort |
Gardiner, N. J. |
title |
Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland |
title_short |
Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland |
title_full |
Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland |
title_fullStr |
Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland |
title_full_unstemmed |
Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland |
title_sort |
building mesoarchaean crust upon eoarchaean roots : the akia terrane, west greenland |
publishDate |
2019 |
url |
http://hdl.handle.net/10023/18486 https://doi.org/10.1007/s00410-019-1554-x |
long_lat |
ENVELOPE(-52.133,-52.133,65.267,65.267) ENVELOPE(-55.217,-55.217,72.967,72.967) |
geographic |
Finnefjeld Greenland Maniitsoq |
geographic_facet |
Finnefjeld Greenland Maniitsoq |
genre |
Greenland Maniitsoq North Atlantic |
genre_facet |
Greenland Maniitsoq North Atlantic |
op_relation |
Contributions to Mineralogy and Petrology Gardiner , N J , Kirkland , C L , Hollis , J , Szilas , K , Steenfelt , A , Yakymchuk , C & Heide-Jørgensen , H 2019 , ' Building Mesoarchaean crust upon Eoarchaean roots : the Akia Terrane, West Greenland ' , Contributions to Mineralogy and Petrology , vol. 174 , 20 . https://doi.org/10.1007/s00410-019-1554-x 0010-7999 PURE: 261214853 PURE UUID: 594bd0ab-9e41-4d53-90dd-e67fdaf88010 Scopus: 85062077374 ORCID: /0000-0003-3465-9295/work/62311885 http://hdl.handle.net/10023/18486 https://doi.org/10.1007/s00410-019-1554-x |
op_rights |
Copyright © The Author(s) 2019. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
op_doi |
https://doi.org/10.1007/s00410-019-1554-x |
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Contributions to Mineralogy and Petrology |
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174 |
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