Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Journalof StructuralGeology,Vol. 16, No. 10, pp. 1385to 1401,1994 Copyright 1994ElsevierScienceLtd
 

Summary: Pergamon
Journalof StructuralGeology,Vol. 16, No. 10, pp. 1385to 1401,1994
Copyright© 1994ElsevierScienceLtd
Printedin Great Britain. All rightsreserved
(l191-8141194$7.00+0.00
0191-8141(94)E0022-Q
Caledonian compressional and late-orogenic extensional deformation in
the Staveneset area, Sunnfjord, Western Norway
PER TERJE OSMUNDSEN and TORGEIR B. ANDERSEN
Department of Geology, University of Oslo, P.O. Box 1047, 0316 Blindern, Oslo 3, Norway
(Received 5 November 1992; accepted in revised form 5 January 1994)
Abstract--The studied area in Western Norway constitutes part of the hangingwall of the extensional
Kvamshesten Detachment Zone (KDZ). The KDZ separates eclogite-bearing lower crust from a hangingwall
consisting of a Precambrian basement-cover pair, Silurian continental margin sediments, a Silurian obduction
melange, a Late-Ordovician ophiolite and the Devonian Kvamshesten Basin, deposited unconformably on the
Pre-Devonian rocks. Contractional deformation related to ophiolite obduction and to the Caledonian Scandian
Orogeny produced a suite of SE-verging structures developed under greenschist facies conditions. As orogenic
collapse commenced, extensional shear zones were formed in the upper and middle crust, re-activating
contractional shear zones and fabrics. The direction of transport on the inherited fabrics was reversed from top-
to-southeast to top-to-northwest, and structures related to the regional extension were superimposed on the

  

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

 

Collections: Geosciences