Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy
Onshore exposures of the North Atlantic Igneous Province have been studied in detail for over 200 years, whereas the more extensive offshore volcanic stratigraphy is significantly less well-constrained with the exception of a small number of boreholes. Within this study we integrate seismic and well...
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Geological Society of London
2022
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Online Access: | http://nora.nerc.ac.uk/id/eprint/526145/ https://nora.nerc.ac.uk/id/eprint/526145/1/Walker_et_al_Paleogene_volcanics.pdf https://doi.org/10.1144/SP495-2019-13 |
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ftnerc:oai:nora.nerc.ac.uk:526145 2023-05-15T17:33:42+02:00 Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy Walker, Faye Schofield, Nick Millett, John Jolley, David Hole, Malcolm Stewart, Margaret Chiarella, D. 2022-09-05 text http://nora.nerc.ac.uk/id/eprint/526145/ https://nora.nerc.ac.uk/id/eprint/526145/1/Walker_et_al_Paleogene_volcanics.pdf https://doi.org/10.1144/SP495-2019-13 en eng Geological Society of London https://nora.nerc.ac.uk/id/eprint/526145/1/Walker_et_al_Paleogene_volcanics.pdf Walker, Faye; Schofield, Nick; Millett, John; Jolley, David; Hole, Malcolm; Stewart, Margaret. 2022 Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy. In: Chiarella, D., (ed.) Cross-Border Themes in Petroleum Geology II: Atlantic Margin and Barents Sea. Geological Society of London, 199-235. (Geological Society Special Publication, 495). Publication - Book Section PeerReviewed 2022 ftnerc https://doi.org/10.1144/SP495-2019-13 2023-02-04T19:49:47Z Onshore exposures of the North Atlantic Igneous Province have been studied in detail for over 200 years, whereas the more extensive offshore volcanic stratigraphy is significantly less well-constrained with the exception of a small number of boreholes. Within this study we integrate seismic and well data across the northern Faroe-Shetland Basin and Møre Marginal High to improve understanding of the volcanic stratigraphy and its relationship to rifting in the NE Atlantic. Volcanic seismic facies, including compound and tabular lavas and hyaloclastites (representing subaerial and subaqueous emplacement) are interpreted across the study area, calibrated by the Lagavulin borehole. The volcanic sequence was erupted between ∼56.1-55.2 Ma, when subaerial conditions dominated in the region, but extensive lava deltas developed in a seaway east of the main lava field. Geochemical and thickness variations within the volcanic pile have important implications for the regional rifting history. MORB-like lavas at the base of Lagavulin, which thicken substantially northward, support an early onset of rifting near the Møre Marginal High prior to major thinning associated with continental breakup to the south and north. Following a period of erosion, smaller-degree melting caused eruption of higher-TiO2/Zr lavas, marking the final ‘pre-breakup’ volcanism before emplacement of seaward-dipping reflectors. Book Part North Atlantic Natural Environment Research Council: NERC Open Research Archive Geological Society, London, Special Publications SP495-2019-13 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Onshore exposures of the North Atlantic Igneous Province have been studied in detail for over 200 years, whereas the more extensive offshore volcanic stratigraphy is significantly less well-constrained with the exception of a small number of boreholes. Within this study we integrate seismic and well data across the northern Faroe-Shetland Basin and Møre Marginal High to improve understanding of the volcanic stratigraphy and its relationship to rifting in the NE Atlantic. Volcanic seismic facies, including compound and tabular lavas and hyaloclastites (representing subaerial and subaqueous emplacement) are interpreted across the study area, calibrated by the Lagavulin borehole. The volcanic sequence was erupted between ∼56.1-55.2 Ma, when subaerial conditions dominated in the region, but extensive lava deltas developed in a seaway east of the main lava field. Geochemical and thickness variations within the volcanic pile have important implications for the regional rifting history. MORB-like lavas at the base of Lagavulin, which thicken substantially northward, support an early onset of rifting near the Møre Marginal High prior to major thinning associated with continental breakup to the south and north. Following a period of erosion, smaller-degree melting caused eruption of higher-TiO2/Zr lavas, marking the final ‘pre-breakup’ volcanism before emplacement of seaward-dipping reflectors. |
author2 |
Chiarella, D. |
format |
Book Part |
author |
Walker, Faye Schofield, Nick Millett, John Jolley, David Hole, Malcolm Stewart, Margaret |
spellingShingle |
Walker, Faye Schofield, Nick Millett, John Jolley, David Hole, Malcolm Stewart, Margaret Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy |
author_facet |
Walker, Faye Schofield, Nick Millett, John Jolley, David Hole, Malcolm Stewart, Margaret |
author_sort |
Walker, Faye |
title |
Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy |
title_short |
Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy |
title_full |
Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy |
title_fullStr |
Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy |
title_full_unstemmed |
Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy |
title_sort |
paleogene volcanic rocks in the northern faroe-shetland basin and møre marginal high: understanding lava field stratigraphy |
publisher |
Geological Society of London |
publishDate |
2022 |
url |
http://nora.nerc.ac.uk/id/eprint/526145/ https://nora.nerc.ac.uk/id/eprint/526145/1/Walker_et_al_Paleogene_volcanics.pdf https://doi.org/10.1144/SP495-2019-13 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/526145/1/Walker_et_al_Paleogene_volcanics.pdf Walker, Faye; Schofield, Nick; Millett, John; Jolley, David; Hole, Malcolm; Stewart, Margaret. 2022 Paleogene volcanic rocks in the northern Faroe-Shetland Basin and Møre Marginal High: understanding lava field stratigraphy. In: Chiarella, D., (ed.) Cross-Border Themes in Petroleum Geology II: Atlantic Margin and Barents Sea. Geological Society of London, 199-235. (Geological Society Special Publication, 495). |
op_doi |
https://doi.org/10.1144/SP495-2019-13 |
container_title |
Geological Society, London, Special Publications |
container_start_page |
SP495-2019-13 |
_version_ |
1766132287170150400 |