The spatial distribution of igneous centres along the Norwegian Atlantic Margin (Møre and Vøring) and their relationship to magmatic plumbing systems
| Autor: | Nick Schofield, Ingelin Løkling Lunde, Christian Haug Eide, David W. Jolley, Hollie Romain, Lauren Chedburn, Ben Kilhams |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Seamount Geology Norwegian Structural basin 010502 geochemistry & geophysics Spatial distribution 01 natural sciences language.human_language Igneous rock Paleontology Volcano language Upwelling Submarine pipeline 0105 earth and related environmental sciences |
| Zdroj: | Journal of the Geological Society. 178 |
| ISSN: | 2041-479X 0016-7649 |
| DOI: | 10.1144/jgs2020-192 |
| Popis: | A series of offshore intra-basinal igneous centres have been documented across the North Atlantic Igneous Province including the UK, 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 paper presents evidence for a series of Norwegian igneous centres and suggests a consistent non-genetic cross-border terminology. In the More 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 probably present within the More Basin (east of the COB) where 3D seismic data were not available. In the Voring 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. |
| Databáze: | OpenAIRE |
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