Paleomagnetism Of 1780-1770 Ma Mafic And Composite Intrusions Of Smaland (Sweden): Implications For The Mesoproterozoic Supercontinent

We present a paleomagnefic study of 1785 to 1770 Ma composite and mafic intrusions in Smaland, Sweden. A positive inverse baked contact test suggests the primary nature of their magnetization. The palaeomagnetic pole (45.7 degrees N, 182.7 degrees E, A(95)=8.0 degrees) may be regarded as a key pole...

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Bibliographic Details
Published in:American Journal of Science
Main Authors: Pisarevsky, S. A., Bylund, Göran
Format: Article in Journal/Newspaper
Language:English
Published: American Journal of Science 2010
Subjects:
Geology
Paleoproterozoic
Fen noscandia
Trans-scandinavian Igneous Belt
Sarmatia
paleomagnetism
Smaland porphyries
Nuna supercontinent
Fennoscandia
Online Access:https://lup.lub.lu.se/record/1918214
https://doi.org/10.2475/09.2010.15
Description
Summary:We present a paleomagnefic study of 1785 to 1770 Ma composite and mafic intrusions in Smaland, Sweden. A positive inverse baked contact test suggests the primary nature of their magnetization. The palaeomagnetic pole (45.7 degrees N, 182.7 degrees E, A(95)=8.0 degrees) may be regarded as a key pole for Fennoscandia. Available paleomagnetic data suggest that Laurentia and Fennoscandia/Balfica drifted together since 1780 Ma until at least 1265 Ma. These two continents could form a core of a hypothetical Mesoproterozoic supercontinent.

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