Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Journal of the Geological Society, London, Vol. 154, 1997, pp. 961973, 10 figs, 2 tables. Printed in Great Britain The age and tectonic significance of dolerite dykes in western Norway
 

Summary: Journal of the Geological Society, London, Vol. 154, 1997, pp. 961­973, 10 figs, 2 tables. Printed in Great Britain
The age and tectonic significance of dolerite dykes in western Norway
TROND H. TORSVIK1,3
, TORGEIR B. ANDERSEN2
, ELIZABETH A. EIDE1
&
HARALD J. WALDERHAUG3
1
Geological Survey of Norway, PB 3006 Lade, N-7002 Trondheim, Norway
2
Department of Geology, University of Oslo, PO Box 1047, 0316 Blindern, Oslo 3, Norway
3
Institute of Solid Earth Physics, University of Bergen, Allegt. 41, N-5007 Bergen, Norway
Abstract: Coast-parallel dykes in SW Norway, primarily of Permo-Triassic age, have been linked
regionally to the early tectonic evolution of the Norwegian continental shelf. We demonstrate from
palaeomagnetic data (mean declination=206.1 , inclination= 30.1 , 95=11.8 ) that dolerite dykes in the
coastal Sunnfjord region of Western Norway and immediately west of the Devonian Basins are also of
Permian (c. 250­270 Ma) age, and not lower- or pre-Devonian as previously advocated. The Sunnfjord
dykes appear to be contemporaneous with dykes from SW Norway at Sotra (262 6 Ma) and the oldest
dykes from Sunnhordland (260­280 Ma), and geochemical data attest to a transition from sub-alkaline to

  

Source: Andersen, Torgeir Bjørge - Centre for Physics of Geological Processes & Department of Geosciences, Universitetet i Oslo

 

Collections: Geosciences