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The Early Carboniferous Mageroy dykes, northern Norway: palaeomagnetism and palaeogeography

Roberts, RJ; Torsvik, TH; Andersen, TB and Rehnström, Emma LU (2003) In Geological Magazine 140(4). p.443-451
Abstract
Palaeomagnetic data from the 337 Ma Mageroy dykes (northern Norway) are of exceptionally high quality, and a positive contact test along with an existing regional result from the Silurian Honningsvag Igneous Suite attests to a primary Early Carboniferous magnetic signature. The palaeomagnetic pole (S 14.8degrees, E320.1degrees, dp/dm = 4.4/8.6degrees) is the first Early Carboniferous pole from Baltica, and implies that northernmost Norway-Greenland, the Barents Sea and Svalbard were located at tropical to low northerly latitudes at this time. Northward drift during Carboniferous times (5-6 cm/yr) as demonstrated from palaeomagnetic data is also reflected in the sedimentary facies in the Barents Sea realm, that is, a change from tropical... (More)
Palaeomagnetic data from the 337 Ma Mageroy dykes (northern Norway) are of exceptionally high quality, and a positive contact test along with an existing regional result from the Silurian Honningsvag Igneous Suite attests to a primary Early Carboniferous magnetic signature. The palaeomagnetic pole (S 14.8degrees, E320.1degrees, dp/dm = 4.4/8.6degrees) is the first Early Carboniferous pole from Baltica, and implies that northernmost Norway-Greenland, the Barents Sea and Svalbard were located at tropical to low northerly latitudes at this time. Northward drift during Carboniferous times (5-6 cm/yr) as demonstrated from palaeomagnetic data is also reflected in the sedimentary facies in the Barents Sea realm, that is, a change from tropical (Early Carboniferous) to subtropical (20-30degrees N) carbonates and evaporites in the Late Carboniferous. The Mageroy dykes are continental tholeiites which intruded into a set of NW-SE-trending normal faults parallel to the Trollfjorden-Komagelva Fault Zone and the Mageroysundet Fault immediately to the north and south of Mageroya, respectively. These, and many other NW-SE-trending faults (onshore and offshore), were active during Late Palaeozoic extension, and the dykes were probably contemporaneous with the earliest syn-rift sedimentation in the Barents Sea (for example, the Nordkapp Basin). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
palaeogeography, Carboniferous, Norway, palaeomagnetism
in
Geological Magazine
volume
140
issue
4
pages
443 - 451
publisher
Cambridge University Press
external identifiers
  • wos:000185583600004
  • scopus:0141484427
ISSN
0016-7568
DOI
10.1017/S0016756803008082
language
English
LU publication?
yes
id
720bebdc-c02e-4878-8ed8-9df4bcb6dfb2 (old id 299812)
date added to LUP
2007-09-20 17:47:04
date last changed
2017-01-08 04:10:19
@article{720bebdc-c02e-4878-8ed8-9df4bcb6dfb2,
  abstract     = {Palaeomagnetic data from the 337 Ma Mageroy dykes (northern Norway) are of exceptionally high quality, and a positive contact test along with an existing regional result from the Silurian Honningsvag Igneous Suite attests to a primary Early Carboniferous magnetic signature. The palaeomagnetic pole (S 14.8degrees, E320.1degrees, dp/dm = 4.4/8.6degrees) is the first Early Carboniferous pole from Baltica, and implies that northernmost Norway-Greenland, the Barents Sea and Svalbard were located at tropical to low northerly latitudes at this time. Northward drift during Carboniferous times (5-6 cm/yr) as demonstrated from palaeomagnetic data is also reflected in the sedimentary facies in the Barents Sea realm, that is, a change from tropical (Early Carboniferous) to subtropical (20-30degrees N) carbonates and evaporites in the Late Carboniferous. The Mageroy dykes are continental tholeiites which intruded into a set of NW-SE-trending normal faults parallel to the Trollfjorden-Komagelva Fault Zone and the Mageroysundet Fault immediately to the north and south of Mageroya, respectively. These, and many other NW-SE-trending faults (onshore and offshore), were active during Late Palaeozoic extension, and the dykes were probably contemporaneous with the earliest syn-rift sedimentation in the Barents Sea (for example, the Nordkapp Basin).},
  author       = {Roberts, RJ and Torsvik, TH and Andersen, TB and Rehnström, Emma},
  issn         = {0016-7568},
  keyword      = {palaeogeography,Carboniferous,Norway,palaeomagnetism},
  language     = {eng},
  number       = {4},
  pages        = {443--451},
  publisher    = {Cambridge University Press},
  series       = {Geological Magazine},
  title        = {The Early Carboniferous Mageroy dykes, northern Norway: palaeomagnetism and palaeogeography},
  url          = {http://dx.doi.org/10.1017/S0016756803008082},
  volume       = {140},
  year         = {2003},
}