The spatial distribution of igneous centres along the Norwegian Atlantic Margin (Møre and Vøring) and their relationship to magmatic plumbing systems

Ben Kilhams* (Corresponding Author), Lauren Chedburn, Nick Schofield, Ingelin Løkling Lunde, Hollie Romain, David Jolley, Christian Haug Eide

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A series of offshore intra-basinal igneous centres have been documented across the North Atlantic Igneous Province including the United Kingdom, Ireland and Greenland. However, inconsistent cross-border terminology implies that similar features are not present in the Norwegian offshore which, in turns, leads to misperceptions of cross-border geological differences. This manuscript presents evidence for a series of Norwegian igneous centres and suggests a consistent non-genetic cross-border terminology. In the Møre Basin, several igneous centres sit close to the continent ocean boundary (COB) which have previously been identified as seamounts and/or „outer highs‟. To provide cross-border consistency these features are consolidated under umbrella terms; igneous centres or volcanic fissures. Further centres are likely present within the Møre Basin (east of the COB) where 3D seismic data were not available. In the Vøring Basin two new igneous centres, one intrusive and one extrusive, are identified within the continental domain. Additionally, a possible deep magmatic upwelling associated with the regionally significant T-Reflector is identified. These igneous centre end-members represent the complexity of the magmatic plumbing across the Norwegian margin. With further data it is likely that further igneous centres will be identified offshore mid Norway.
Original languageEnglish
Article numberARTN jgs2020-192
Number of pages20
JournalJournal of the Geological Society
Volume178
Issue number5
Early online date16 Apr 2021
DOIs
Publication statusPublished - 2021

Keywords

  • Igneous Centres
  • Volcanic Systems
  • Seismic Interpretation
  • Norway
  • United Kingdom

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