Evolution of the Archaean Karelian Province in the Fennoscandian Shield in the light of U–Pb zircon ages and Sm–Nd and Lu–Hf isotope systematics
In situ Lu–Hf (laser ablation microprobe–inductively coupled plasma mass spectrometry (LAM-ICPMS)) and U–Pb (LAM-ICPMS, secondary ionization mass spectrometry (SIMS)) analyses of zircon, and whole-rock Sm–Nd isotope analyses were performed on rocks formed during magmatic events in three Archaean com...
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Geological Society of London
2016
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Online Access: | https://dx.doi.org/10.6084/m9.figshare.3454901 https://geolsoc.figshare.com/articles/dataset/Evolution_of_the_Archaean_Karelian_Province_in_the_Fennoscandian_Shield_in_the_light_of_U_Pb_zircon_ages_and_Sm_Nd_and_Lu_Hf___isotope_systematics/3454901 |
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ftdatacite:10.6084/m9.figshare.3454901 2023-05-15T16:12:03+02:00 Evolution of the Archaean Karelian Province in the Fennoscandian Shield in the light of U–Pb zircon ages and Sm–Nd and Lu–Hf isotope systematics Lauri, Laura S. Andersen, Tom Hölttä, Pentti Huhma, Hannu Graham, Stuart 2016 https://dx.doi.org/10.6084/m9.figshare.3454901 https://geolsoc.figshare.com/articles/dataset/Evolution_of_the_Archaean_Karelian_Province_in_the_Fennoscandian_Shield_in_the_light_of_U_Pb_zircon_ages_and_Sm_Nd_and_Lu_Hf___isotope_systematics/3454901 unknown Geological Society of London https://dx.doi.org/10.1144/0016-76492009-159 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.3454901 https://doi.org/10.1144/0016-76492009-159 2021-11-05T12:55:41Z In situ Lu–Hf (laser ablation microprobe–inductively coupled plasma mass spectrometry (LAM-ICPMS)) and U–Pb (LAM-ICPMS, secondary ionization mass spectrometry (SIMS)) analyses of zircon, and whole-rock Sm–Nd isotope analyses were performed on rocks formed during magmatic events in three Archaean complexes in the Karelian Province of Fennoscandia (Pudasjärvi, Koillismaa and Iisalmi). These complexes have U–Pb ages ranging from 3.5 to 2.6 Ga. In Pudasjärvi, sparse xenocrystic cores give ages of 3.6–3.7 Ga and initial 176 Hf/ 177 Hf suggesting influence of a crustal component T ≥ 4.0 Ga (assuming a CHUR-like mantle source). Ages and Nd and Hf isotope patterns indicate magmatic events at 3.6–3.7 Ga (Siurua, Pudasjärvi with ≥4.0 Ga precursor), 3.2 Ga (Iisalmi, Koillismaa), 2.8 Ga (Pudasjärvi) and 2.7 Ga (Pudasjärvi, Iisalmi). In the Meso- and Palaeoarchaean events, there is no evidence of sources equivalent to present-day depleted mantle; such sources were, however, involved in the 2.8–2.7 Ga events. ε Hf and ε Nd are strongly correlated. Contrasts between the Archaean complexes indicate that they evolved separately until c . 2.7 Ga. The age and ε Hf pattern of ≤2.8 Ga rocks in the Karelian Province is compatible with a scenario in which the Karelia, Superior, Yilgarn and Slave cratons were part of a late Archaean supercontinent, but does not constitute proof of the existence of such a supercontinent. Dataset Fennoscandia Fennoscandian karelian DataCite Metadata Store (German National Library of Science and Technology) Koillismaa ENVELOPE(29.047,29.047,65.843,65.843) |
institution |
Open Polar |
collection |
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 Lauri, Laura S. Andersen, Tom Hölttä, Pentti Huhma, Hannu Graham, Stuart Evolution of the Archaean Karelian Province in the Fennoscandian Shield in the light of U–Pb zircon ages and Sm–Nd and Lu–Hf isotope systematics |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
In situ Lu–Hf (laser ablation microprobe–inductively coupled plasma mass spectrometry (LAM-ICPMS)) and U–Pb (LAM-ICPMS, secondary ionization mass spectrometry (SIMS)) analyses of zircon, and whole-rock Sm–Nd isotope analyses were performed on rocks formed during magmatic events in three Archaean complexes in the Karelian Province of Fennoscandia (Pudasjärvi, Koillismaa and Iisalmi). These complexes have U–Pb ages ranging from 3.5 to 2.6 Ga. In Pudasjärvi, sparse xenocrystic cores give ages of 3.6–3.7 Ga and initial 176 Hf/ 177 Hf suggesting influence of a crustal component T ≥ 4.0 Ga (assuming a CHUR-like mantle source). Ages and Nd and Hf isotope patterns indicate magmatic events at 3.6–3.7 Ga (Siurua, Pudasjärvi with ≥4.0 Ga precursor), 3.2 Ga (Iisalmi, Koillismaa), 2.8 Ga (Pudasjärvi) and 2.7 Ga (Pudasjärvi, Iisalmi). In the Meso- and Palaeoarchaean events, there is no evidence of sources equivalent to present-day depleted mantle; such sources were, however, involved in the 2.8–2.7 Ga events. ε Hf and ε Nd are strongly correlated. Contrasts between the Archaean complexes indicate that they evolved separately until c . 2.7 Ga. The age and ε Hf pattern of ≤2.8 Ga rocks in the Karelian Province is compatible with a scenario in which the Karelia, Superior, Yilgarn and Slave cratons were part of a late Archaean supercontinent, but does not constitute proof of the existence of such a supercontinent. |
format |
Dataset |
author |
Lauri, Laura S. Andersen, Tom Hölttä, Pentti Huhma, Hannu Graham, Stuart |
author_facet |
Lauri, Laura S. Andersen, Tom Hölttä, Pentti Huhma, Hannu Graham, Stuart |
author_sort |
Lauri, Laura S. |
title |
Evolution of the Archaean Karelian Province in the Fennoscandian Shield in the light of U–Pb zircon ages and Sm–Nd and Lu–Hf isotope systematics |
title_short |
Evolution of the Archaean Karelian Province in the Fennoscandian Shield in the light of U–Pb zircon ages and Sm–Nd and Lu–Hf isotope systematics |
title_full |
Evolution of the Archaean Karelian Province in the Fennoscandian Shield in the light of U–Pb zircon ages and Sm–Nd and Lu–Hf isotope systematics |
title_fullStr |
Evolution of the Archaean Karelian Province in the Fennoscandian Shield in the light of U–Pb zircon ages and Sm–Nd and Lu–Hf isotope systematics |
title_full_unstemmed |
Evolution of the Archaean Karelian Province in the Fennoscandian Shield in the light of U–Pb zircon ages and Sm–Nd and Lu–Hf isotope systematics |
title_sort |
evolution of the archaean karelian province in the fennoscandian shield in the light of u–pb zircon ages and sm–nd and lu–hf isotope systematics |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3454901 https://geolsoc.figshare.com/articles/dataset/Evolution_of_the_Archaean_Karelian_Province_in_the_Fennoscandian_Shield_in_the_light_of_U_Pb_zircon_ages_and_Sm_Nd_and_Lu_Hf___isotope_systematics/3454901 |
long_lat |
ENVELOPE(29.047,29.047,65.843,65.843) |
geographic |
Koillismaa |
geographic_facet |
Koillismaa |
genre |
Fennoscandia Fennoscandian karelian |
genre_facet |
Fennoscandia Fennoscandian karelian |
op_relation |
https://dx.doi.org/10.1144/0016-76492009-159 |
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.3454901 https://doi.org/10.1144/0016-76492009-159 |
_version_ |
1765997285569724416 |