Abstract
We present a palaeomagnetic pole for the Arenig-Llanvirn Swedish Orthoceras Limestones based on a new analysis of some earlier reported palaeomagnetic data. This new pole, 18° N and 046° E, differs from the original estimate of 30° N and 46° E. The revised pole probably represents the most reliable Ordovician pole from Baltica, although some uncertainties remain concerning the relative importance of diagenetic/depositional controls on remanence acquisition. Based on the new pole from the Swedish Orthoceras Limestone and recent palaeomagnetic results from the northern Scandinavian Caledonides, it is now evident that Baltica lay within southerly latitudes of between 30 and 60° S in Cambro-Ordovician times. Subsequent anticlockwise rotation relative to eastern Avalonia (southern Britain) may indicate dextral shear across the Tornquist suture prior to Mid-Late Ordovician amalgamation of eastern Avalonia and Baltica.
| Original language | English |
|---|---|
| Pages (from-to) | 283-291 |
| Number of pages | 9 |
| Journal | Physics of the Earth and Planetary Interiors |
| Volume | 65 |
| Issue number | 3-5 |
| DOIs | |
| Publication status | Published - 1 Jan 1991 |
| Externally published | Yes |
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The Lower-Middle Ordovician palaeofield of Scandinavia : southern Sweden 'revisited'. / Torsvik, Trond H.; Trench, Allan.
In: Physics of the Earth and Planetary Interiors, Vol. 65, No. 3-5, 01.01.1991, p. 283-291.Research output: Contribution to journal › Article
TY - JOUR
T1 - The Lower-Middle Ordovician palaeofield of Scandinavia
T2 - southern Sweden 'revisited'
AU - Torsvik, Trond H.
AU - Trench, Allan
PY - 1991/1/1
Y1 - 1991/1/1
N2 - We present a palaeomagnetic pole for the Arenig-Llanvirn Swedish Orthoceras Limestones based on a new analysis of some earlier reported palaeomagnetic data. This new pole, 18° N and 046° E, differs from the original estimate of 30° N and 46° E. The revised pole probably represents the most reliable Ordovician pole from Baltica, although some uncertainties remain concerning the relative importance of diagenetic/depositional controls on remanence acquisition. Based on the new pole from the Swedish Orthoceras Limestone and recent palaeomagnetic results from the northern Scandinavian Caledonides, it is now evident that Baltica lay within southerly latitudes of between 30 and 60° S in Cambro-Ordovician times. Subsequent anticlockwise rotation relative to eastern Avalonia (southern Britain) may indicate dextral shear across the Tornquist suture prior to Mid-Late Ordovician amalgamation of eastern Avalonia and Baltica.
AB - We present a palaeomagnetic pole for the Arenig-Llanvirn Swedish Orthoceras Limestones based on a new analysis of some earlier reported palaeomagnetic data. This new pole, 18° N and 046° E, differs from the original estimate of 30° N and 46° E. The revised pole probably represents the most reliable Ordovician pole from Baltica, although some uncertainties remain concerning the relative importance of diagenetic/depositional controls on remanence acquisition. Based on the new pole from the Swedish Orthoceras Limestone and recent palaeomagnetic results from the northern Scandinavian Caledonides, it is now evident that Baltica lay within southerly latitudes of between 30 and 60° S in Cambro-Ordovician times. Subsequent anticlockwise rotation relative to eastern Avalonia (southern Britain) may indicate dextral shear across the Tornquist suture prior to Mid-Late Ordovician amalgamation of eastern Avalonia and Baltica.
UR - http://www.scopus.com/inward/record.url?scp=0026051033&partnerID=8YFLogxK
U2 - 10.1016/0031-9201(91)90135-5
DO - 10.1016/0031-9201(91)90135-5
M3 - Article
VL - 65
SP - 283
EP - 291
JO - Physics of the Earth and Planetary Interiors
JF - Physics of the Earth and Planetary Interiors
SN - 0031-9201
IS - 3-5
ER -