Paleomagnetic studies of rapakivi complexes in the Fennoscandian shield – Implications to 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...
Published in: | Precambrian Research |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Uppsala universitet, Geofysik
2021
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-454560 https://doi.org/10.1016/j.precamres.2021.106406 |
id |
ftuppsalauniv:oai:DiVA.org:uu-454560 |
---|---|
record_format |
openpolar |
spelling |
ftuppsalauniv:oai:DiVA.org:uu-454560 2024-02-11T10:03:47+01:00 Paleomagnetic studies of rapakivi complexes in the Fennoscandian shield – Implications to the origin of Proterozoic massif-type anorthosite magmatism Salminen, Johanna Elming, Sten-Åke Mertanen, Satu Wang, Chong Almqvist, Bjarne Moakhar, Mohsen Oveisy 2021 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-454560 https://doi.org/10.1016/j.precamres.2021.106406 eng eng Uppsala universitet, Geofysik Precambrian Research, 0301-9268, 2021, 365, orcid:0000-0001-5347-1920 orcid:0000-0002-9385-7614 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-454560 doi:10.1016/j.precamres.2021.106406 ISI:000703586700018 info:eu-repo/semantics/openAccess Paleomagnetism Massif anorthosites Rapakivi Proterozoic Baltica Nuna supercontinent Geology Geologi Geophysics Geofysik Article in journal info:eu-repo/semantics/article text 2021 ftuppsalauniv https://doi.org/10.1016/j.precamres.2021.106406 2024-01-17T23:32:30Z 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. Article in Journal/Newspaper Fennoscandian Uppsala University: Publications (DiVA) Precambrian Research 365 106406 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Paleomagnetism Massif anorthosites Rapakivi Proterozoic Baltica Nuna supercontinent Geology Geologi Geophysics Geofysik |
spellingShingle |
Paleomagnetism Massif anorthosites Rapakivi Proterozoic Baltica Nuna supercontinent Geology Geologi Geophysics Geofysik Salminen, Johanna Elming, Sten-Åke Mertanen, Satu Wang, Chong Almqvist, Bjarne Moakhar, Mohsen Oveisy Paleomagnetic studies of rapakivi complexes in the Fennoscandian shield – Implications to the origin of Proterozoic massif-type anorthosite magmatism |
topic_facet |
Paleomagnetism Massif anorthosites Rapakivi Proterozoic Baltica Nuna supercontinent Geology Geologi Geophysics Geofysik |
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. |
format |
Article in Journal/Newspaper |
author |
Salminen, Johanna Elming, Sten-Åke Mertanen, Satu Wang, Chong Almqvist, Bjarne Moakhar, Mohsen Oveisy |
author_facet |
Salminen, Johanna Elming, Sten-Åke Mertanen, Satu Wang, Chong Almqvist, Bjarne Moakhar, Mohsen Oveisy |
author_sort |
Salminen, Johanna |
title |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian shield – Implications to the origin of Proterozoic massif-type anorthosite magmatism |
title_short |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian shield – Implications to the origin of Proterozoic massif-type anorthosite magmatism |
title_full |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian shield – Implications to the origin of Proterozoic massif-type anorthosite magmatism |
title_fullStr |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian shield – Implications to the origin of Proterozoic massif-type anorthosite magmatism |
title_full_unstemmed |
Paleomagnetic studies of rapakivi complexes in the Fennoscandian shield – Implications to the origin of Proterozoic massif-type anorthosite magmatism |
title_sort |
paleomagnetic studies of rapakivi complexes in the fennoscandian shield – implications to the origin of proterozoic massif-type anorthosite magmatism |
publisher |
Uppsala universitet, Geofysik |
publishDate |
2021 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-454560 https://doi.org/10.1016/j.precamres.2021.106406 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_relation |
Precambrian Research, 0301-9268, 2021, 365, orcid:0000-0001-5347-1920 orcid:0000-0002-9385-7614 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-454560 doi:10.1016/j.precamres.2021.106406 ISI:000703586700018 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.precamres.2021.106406 |
container_title |
Precambrian Research |
container_volume |
365 |
container_start_page |
106406 |
_version_ |
1790600110341619712 |