Zircon U–Pb and Hf – isotopes from the eastern part of the Sveconorwegian Orogen, SW Sweden: implications for the growth of Fennoscandia
Current models for the growth of Fennoscandia, including the eastern part of the Sveconorwegian Province, are largely based on U–Pb data and do not discriminate between juvenile and reworked crust. Here we present new combined U–Pb and Hf isotopic data, from the Eastern Segment and the Idefjorden te...
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ftdatacite:10.6084/m9.figshare.3453425.v1 2023-05-15T16:11:37+02:00 Zircon U–Pb and Hf – isotopes from the eastern part of the Sveconorwegian Orogen, SW Sweden: implications for the growth of Fennoscandia Petersson, Andreas Scherstén, Anders Andersson, Jenny Möller, Charlotte 2016 https://dx.doi.org/10.6084/m9.figshare.3453425.v1 https://geolsoc.figshare.com/articles/dataset/Zircon_U_Pb_and_Hf_isotopes_from_the_eastern_part_of_the_Sveconorwegian_Orogen_SW_Sweden_implications_for_the_growth_of___Fennoscandia/3453425/1 unknown Geological Society of London https://dx.doi.org/10.1144/sp389.2 https://dx.doi.org/10.6084/m9.figshare.3453425 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences dataset Dataset 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3453425.v1 https://doi.org/10.1144/sp389.2 https://doi.org/10.6084/m9.figshare.3453425 2021-11-05T12:55:41Z Current models for the growth of Fennoscandia, including the eastern part of the Sveconorwegian Province, are largely based on U–Pb data and do not discriminate between juvenile and reworked crust. Here we present new combined U–Pb and Hf isotopic data, from the Eastern Segment and the Idefjorden terrane of the Sveconorwegian Province, and suggest a revised model of crustal growth. Most of the crystalline basement in this part of the shield formed by mixing of a 2.1–1.9 Ga juvenile component and Archaean crust. Archaean reworking decreases between 1.9 and 1.7 Ga and a mixed Svecofennian crustal reservoir is generated. Succeeding magmatism between 1.7 and 1.4 Ga indicates reworking of this reservoir with little or no crust generation. At c. 1.2 Ga, an influx of juvenile magma is recorded by granite to quartz-syenite magmatism with mildly depleted (ε Hf 1.18 Ga of c. 3) signatures. The amount of recycled crust in the 1.9–1.7 Ga arc system is in contrast to previously proposed models for the growth of the southwestern part of the Fennoscandian Shield. This model agrees with long-term subduction along the western margin of Fennoscandia, but suggests substantial reworking of existing crust and decreasing amounts of <1.9 Ga crustal growth. Dataset Fennoscandia Fennoscandian DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences Petersson, Andreas Scherstén, Anders Andersson, Jenny Möller, Charlotte Zircon U–Pb and Hf – isotopes from the eastern part of the Sveconorwegian Orogen, SW Sweden: implications for the growth of Fennoscandia |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
Current models for the growth of Fennoscandia, including the eastern part of the Sveconorwegian Province, are largely based on U–Pb data and do not discriminate between juvenile and reworked crust. Here we present new combined U–Pb and Hf isotopic data, from the Eastern Segment and the Idefjorden terrane of the Sveconorwegian Province, and suggest a revised model of crustal growth. Most of the crystalline basement in this part of the shield formed by mixing of a 2.1–1.9 Ga juvenile component and Archaean crust. Archaean reworking decreases between 1.9 and 1.7 Ga and a mixed Svecofennian crustal reservoir is generated. Succeeding magmatism between 1.7 and 1.4 Ga indicates reworking of this reservoir with little or no crust generation. At c. 1.2 Ga, an influx of juvenile magma is recorded by granite to quartz-syenite magmatism with mildly depleted (ε Hf 1.18 Ga of c. 3) signatures. The amount of recycled crust in the 1.9–1.7 Ga arc system is in contrast to previously proposed models for the growth of the southwestern part of the Fennoscandian Shield. This model agrees with long-term subduction along the western margin of Fennoscandia, but suggests substantial reworking of existing crust and decreasing amounts of <1.9 Ga crustal growth. |
format |
Dataset |
author |
Petersson, Andreas Scherstén, Anders Andersson, Jenny Möller, Charlotte |
author_facet |
Petersson, Andreas Scherstén, Anders Andersson, Jenny Möller, Charlotte |
author_sort |
Petersson, Andreas |
title |
Zircon U–Pb and Hf – isotopes from the eastern part of the Sveconorwegian Orogen, SW Sweden: implications for the growth of Fennoscandia |
title_short |
Zircon U–Pb and Hf – isotopes from the eastern part of the Sveconorwegian Orogen, SW Sweden: implications for the growth of Fennoscandia |
title_full |
Zircon U–Pb and Hf – isotopes from the eastern part of the Sveconorwegian Orogen, SW Sweden: implications for the growth of Fennoscandia |
title_fullStr |
Zircon U–Pb and Hf – isotopes from the eastern part of the Sveconorwegian Orogen, SW Sweden: implications for the growth of Fennoscandia |
title_full_unstemmed |
Zircon U–Pb and Hf – isotopes from the eastern part of the Sveconorwegian Orogen, SW Sweden: implications for the growth of Fennoscandia |
title_sort |
zircon u–pb and hf – isotopes from the eastern part of the sveconorwegian orogen, sw sweden: implications for the growth of fennoscandia |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3453425.v1 https://geolsoc.figshare.com/articles/dataset/Zircon_U_Pb_and_Hf_isotopes_from_the_eastern_part_of_the_Sveconorwegian_Orogen_SW_Sweden_implications_for_the_growth_of___Fennoscandia/3453425/1 |
genre |
Fennoscandia Fennoscandian |
genre_facet |
Fennoscandia Fennoscandian |
op_relation |
https://dx.doi.org/10.1144/sp389.2 https://dx.doi.org/10.6084/m9.figshare.3453425 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.3453425.v1 https://doi.org/10.1144/sp389.2 https://doi.org/10.6084/m9.figshare.3453425 |
_version_ |
1765996778940792832 |