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Nature of Palaeozoic extension in Lofoten, north Norwegian Continental Shelf: insights from 3-D seismic analysis of a Cordilleran-style metamorphic core complex

Henstra, Gijs; Rotevatn, Atle
Peer reviewed, Journal article
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URI
https://hdl.handle.net/1956/10289
Date
2014-06
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  • Department of Earth Science [651]
Original version
https://doi.org/10.1111/ter.12098
Abstract
Analyses of 3-D seismic data reveal that pre-Triassic basins are present underneath the Mesozoic North Træna Basin (Lofoten Margin, Norway). These are linked to a Cordilleran-style metamorphic core complex that developed in Palaeozoic times, including rotated fault blocks with hanging wall ‘growth’ wedges, bounded by listric faults that sole into a sub-horizontal detachment. On the basis of similarity in age, structural style and transport direction, we propose a kinematic link with a Permian mylonitic detachment documented onshore. This study presents the first offshore evidence for Palaeozoic detachment faulting, elucidating the mechanisms behind the long-lived exhumation history of the Lofoten basement.
Publisher
Wiley
Journal
Terra Nova
Copyright
Copyright 2014 John Wiley & Sons Ltd

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