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 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.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geology (hsv//eng)

Nyckelord

Paleoproterozoic

Fen noscandia

Trans-scandinavian Igneous Belt

Sarmatia

paleomagnetism

Smaland porphyries

Nuna supercontinent

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art (ämneskategori)

ref (ämneskategori)