Metamorphic core complexes and gneiss-cored culminations along the Mid-Norwegian margin : an overview and some current ideas
- Osmundsen, Per Terje Norges Geologiske Undersøkelse, Trondheim, Norway
- Braathen, Alvar University Centre in Svalbard, Longyearbyen, Norway
- Sommaruga, Anna Géosciences, Université de Lausanne, Switzerland
- Skilbrei, Jan Reidar Norges Geologiske Undersøkelse, Trondheim, Norway
- Nordgulen, Øystein Norges Geologiske Undersøkelse, Trondheim, Norway
- Roberts, David Norges Geologiske Undersøkelse, Trondheim, Norway
- Andersen, Torgeir B. Institute of Geology, University of Oslo, Norway
- Olesen, Odleiv Norges Geologiske Undersøkelse, Trondheim, Norway
- Mosar, Jon Department of earthsciences, University of Fribourg, Switzerland
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2005
Published in:
- Norwegian Petroleum Society Special Publications. - 2005, vol. 12, p. 29-41
English
From the Palacozoic to the Cretaceous, crustal thinning in the Mid Norway area was associated with the denudation of gneiss-cored culminations and metamorphic core complexes in the footwalls of major extensional faults. The development of the culminations led to warping and deactivation of early detachments, to the nucleation of new faults in more distal positions and to the exhumation of highgrade metamorphic rocks to more shallow levels in the crust. Some of the culminations and core complexes became part of the erosional template in Mid-Late Palaeozoic time, some were probably exhumed in the Mesozoic, whereas some may never have reached the surface. We present an overview of five types of gneiss-cored culminations and core complexes that have been identified in the field, through the interpretation of offshore, long-offset seismic reflection data. We furthermore address their mechanism(s) of formation, and their role in the progressive evolution of the Mid-Norwegian margin.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Géosciences
- Language
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- English
- Classification
- Geology
- License
- License undefined
- Identifiers
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- RERO DOC 9774
- DOI 10.1016/S0928-8937(05)80042-6
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300862
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