Open AccessPalaeomagnetism of 935 Ma mafic dykes in southern Sweden and implications for the Sveconorwegian Loop
Author(s) -
Pisarevsky S. A.,
Bylund G.
Publication year - 2006
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1111/j.1365-246x.2006.03076.x
Subject(s) - baltica , laurentia , mafic , geology , paleomagnetism , apparent polar wander , geomagnetic pole , paleontology , earth's magnetic field , ordovician , geophysics , physics , quantum mechanics , magnetic field
SUMMARY New palaeomagnetic results for the 935 Ma Göteborg‐Slussen mafic dykes in southern Sweden provide a well‐dated high‐quality palaeomagnetic pole for Early Neoproterozoic Baltica. New U‐Pb geochronological data for several palaeomagnetically studied mafic intrusions yield three additional well‐dated palaeopoles and one virtual geomagnetic pole. This set of dated poles suggests minimal drift of Baltica in moderate latitudes between ∼965 and 915 Ma. They also support the hypothesis of a post‐900 Ma regional remagnetization event in SW Sweden and SW Norway. The positions of three distinct clusters of ∼1100 to 850 Ma palaeopoles suggest a clockwise time progression of the Baltica apparent polar wander path (the Sveconorwegian Loop) during this time interval. New well‐dated palaeomagnetic poles for ∼970 to 900 Ma from Laurentia are required to verify the palaeogeographic reconstructions of Baltica and Laurentia.