Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism
Paleomagnetic studies have been performed on five rapakivi related complexes in Sweden and Finland. Poles of varying quality have been defined and the majority of the similar to 1640-1497 Ma poles are clustering on low latitudinal positions. By combining data from similar to 1500 Ma intrusions a new...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/335786 2024-01-07T09:43:12+01:00 Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism Salminen, Johanna Elming, Sten-Ake Mertanen, Satu Wang, Chong Almqvist, Bjarne Moakhar, Mohsen Oveisy Doctoral Programme in Geosciences Department of Geosciences and Geography 2021-10-28T10:45:03Z 30 application/pdf http://hdl.handle.net/10138/335786 eng eng Elsevier Scientific Publ. Co 10.1016/j.precamres.2021.106406 We are grateful for the efforts and inspiring work of late Svetlana Bogdanova. Her work will form the basis for future research for a long time ahead. We thank guest editors, prof. Lubnina and Dr. S. Pisarevsky and reviewers, Dr. Pivarunas and an anonymous, for their constructive comments, which improved the manuscript. Fredrik Karell and Arto Luttinen are acknowledged for sampling and for overall research of the of the Kopparnas dyke swarm. Kaiu Piipponen is thanked for help during the Ragunda field work and Ulf Andersson for guidance in the Stromsbro area. This publication contributes to IGCP648 Supercontinent Cycles & Global Geodynamics. JS was funded by Academy of Finland, grant #319277. SAE was funded by the Swedish Research Council. Salminen , J , Elming , S-A , Mertanen , S , Wang , C , Almqvist , B & Moakhar , M O 2021 , ' Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism ' , Precambrian Research , vol. 365 , 106406 . https://doi.org/10.1016/j.precamres.2021.106406 ORCID: /0000-0001-5347-1920/work/104209865 2eb1d171-fe7d-4dbd-9655-1595915211ec http://hdl.handle.net/10138/335786 000703586700018 cc_by openAccess info:eu-repo/semantics/openAccess 1171 Geosciences Article publishedVersion 2021 ftunivhelsihelda 2023-12-14T00:13:53Z Paleomagnetic studies have been performed on five rapakivi related complexes in Sweden and Finland. Poles of varying quality have been defined and the majority of the similar to 1640-1497 Ma poles are clustering on low latitudinal positions. By combining data from similar to 1500 Ma intrusions a new high-quality pole (Plat: 13 degrees N; Plon: 190 degrees E; A(95): 11 degrees, K: 14) for Baltica has been defined. Tectonic reconstructions, on the basis of the new data and previously published high-quality data, indicate that Baltica experienced stable low latitude to equatorial positions during 1640-1470 Ma, temporally coinciding with globally pronounced rapakivi-anorthosite magmatism. Our study argues against single hotspot source for similar to 1640-1620 Ma, similar to 1590-1520 Ma, and 1470-1410 Ma rapakivianorthosites, but supports a model of large-scale superswell under a stationary low-latitude position of supercontinent Nuna for the origin of rapakivi-anorthosite magmatism. However, a possibility for convergent tectonism as the origin cannot be ruled out. Peer reviewed Article in Journal/Newspaper Fennoscandian HELDA – University of Helsinki Open Repository Precambrian Research 365 106406 |
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Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
1171 Geosciences |
spellingShingle |
1171 Geosciences Salminen, Johanna Elming, Sten-Ake Mertanen, Satu Wang, Chong Almqvist, Bjarne Moakhar, Mohsen Oveisy Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism |
topic_facet |
1171 Geosciences |
description |
Paleomagnetic studies have been performed on five rapakivi related complexes in Sweden and Finland. Poles of varying quality have been defined and the majority of the similar to 1640-1497 Ma poles are clustering on low latitudinal positions. By combining data from similar to 1500 Ma intrusions a new high-quality pole (Plat: 13 degrees N; Plon: 190 degrees E; A(95): 11 degrees, K: 14) for Baltica has been defined. Tectonic reconstructions, on the basis of the new data and previously published high-quality data, indicate that Baltica experienced stable low latitude to equatorial positions during 1640-1470 Ma, temporally coinciding with globally pronounced rapakivi-anorthosite magmatism. Our study argues against single hotspot source for similar to 1640-1620 Ma, similar to 1590-1520 Ma, and 1470-1410 Ma rapakivianorthosites, but supports a model of large-scale superswell under a stationary low-latitude position of supercontinent Nuna for the origin of rapakivi-anorthosite magmatism. However, a possibility for convergent tectonism as the origin cannot be ruled out. Peer reviewed |
author2 |
Doctoral Programme in Geosciences Department of Geosciences and Geography |
format |
Article in Journal/Newspaper |
author |
Salminen, Johanna Elming, Sten-Ake Mertanen, Satu Wang, Chong Almqvist, Bjarne Moakhar, Mohsen Oveisy |
author_facet |
Salminen, Johanna Elming, Sten-Ake Mertanen, Satu Wang, Chong Almqvist, Bjarne Moakhar, Mohsen Oveisy |
author_sort |
Salminen, Johanna |
title |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism |
title_short |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism |
title_full |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism |
title_fullStr |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism |
title_full_unstemmed |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism |
title_sort |
paleomagnetic studies of rapakivi complexes in the fennoscandian shield : implications for the origin of proterozoic massif-type anorthosite magmatism |
publisher |
Elsevier Scientific Publ. Co |
publishDate |
2021 |
url |
http://hdl.handle.net/10138/335786 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_relation |
10.1016/j.precamres.2021.106406 We are grateful for the efforts and inspiring work of late Svetlana Bogdanova. Her work will form the basis for future research for a long time ahead. We thank guest editors, prof. Lubnina and Dr. S. Pisarevsky and reviewers, Dr. Pivarunas and an anonymous, for their constructive comments, which improved the manuscript. Fredrik Karell and Arto Luttinen are acknowledged for sampling and for overall research of the of the Kopparnas dyke swarm. Kaiu Piipponen is thanked for help during the Ragunda field work and Ulf Andersson for guidance in the Stromsbro area. This publication contributes to IGCP648 Supercontinent Cycles & Global Geodynamics. JS was funded by Academy of Finland, grant #319277. SAE was funded by the Swedish Research Council. Salminen , J , Elming , S-A , Mertanen , S , Wang , C , Almqvist , B & Moakhar , M O 2021 , ' Paleomagnetic studies of rapakivi complexes in the Fennoscandian Shield : Implications for the origin of Proterozoic massif-type anorthosite magmatism ' , Precambrian Research , vol. 365 , 106406 . https://doi.org/10.1016/j.precamres.2021.106406 ORCID: /0000-0001-5347-1920/work/104209865 2eb1d171-fe7d-4dbd-9655-1595915211ec http://hdl.handle.net/10138/335786 000703586700018 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
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Precambrian Research |
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365 |
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106406 |
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