Nature of Palaeozoic extension in Lofoten, north Norwegian Continental Shelf: insights from 3‐D seismic analysis of a Cordilleran‐style metamorphic core complex
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...
| Published in: | Terra Nova |
|---|---|
| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
2014
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/ter.12098 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fter.12098 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ter.12098 |
| Summary: | 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. |
|---|