Heat flow of northern Norway, new data and geodynamic implications
The present contribution introduces new heat flow data from northern Norway, a region of the Baltic Shied and Scandinavian Caledonides that has been poorly covered until now. We computed heat flow values based on data gathered in ten boreholes reaching total depths ranging between ∼390 m and 960 m b...
Published in: | Tectonophysics |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2023
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ftuniaarhuspubl:oai:pure.atira.dk:publications/ac2e37bd-8b5f-4c5d-80af-f1b6fe657732 2023-12-10T09:50:31+01:00 Heat flow of northern Norway, new data and geodynamic implications Pascal, Christophe Balling, Niels 2023-11 https://pure.au.dk/portal/da/publications/heat-flow-of-northern-norway-new-data-and-geodynamic-implications(ac2e37bd-8b5f-4c5d-80af-f1b6fe657732).html https://doi.org/10.1016/j.tecto.2023.230067 http://www.scopus.com/inward/record.url?scp=85174154605&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/da/publications/heat-flow-of-northern-norway-new-data-and-geodynamic-implications(ac2e37bd-8b5f-4c5d-80af-f1b6fe657732).html info:eu-repo/semantics/restrictedAccess Pascal , C & Balling , N 2023 , ' Heat flow of northern Norway, new data and geodynamic implications ' , Tectonophysics , vol. 867 , 230067 . https://doi.org/10.1016/j.tecto.2023.230067 Baltic Shield Continental break-up Craton Ice Age Lithosphere Rifting Thermal state article 2023 ftuniaarhuspubl https://doi.org/10.1016/j.tecto.2023.230067 2023-11-16T00:01:51Z The present contribution introduces new heat flow data from northern Norway, a region of the Baltic Shied and Scandinavian Caledonides that has been poorly covered until now. We computed heat flow values based on data gathered in ten boreholes reaching total depths ranging between ∼390 m and 960 m below ground level. Abundant core material for five of the studied boreholes allowed for precise determination of thermal conductivity profiles. The new determinations represent significant improvement with respect to the few pre-existing heat flow values that were based on shallow drillholes and lake measurements. The obtained heat flow values range between ∼40 and 70 mW/m 2 , after corrections, and suggest significant heat flow decrease (i.e. ∼10–20 mW/m 2 ) from chiefly Proterozoic terrains to the Archean nucleus in NE Norway. The results suggest also sharp decrease in heat flow from the NE Atlantic to the Lofoten-Vesterålen margin but rather smooth gradients from the Barents Shelf to the continent. The former may be associated with abrupt deepening of the base of the lithosphere below the Lofoten-Vesterålen margin, as already suggested by previous seismic tomography studies and consistent with drastic strain focusing and the formation of a narrow margin. In contrast, gradual deepening of the base lithosphere towards the continent appears to be in agreement with the observed diffuse deformation that took place in the comparatively wide Western Barents Shelf. Article in Journal/Newspaper Lofoten Northern Norway Vesterålen Aarhus University: Research Lofoten Norway Vesterålen ENVELOPE(14.939,14.939,68.754,68.754) Tectonophysics 867 230067 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Baltic Shield Continental break-up Craton Ice Age Lithosphere Rifting Thermal state |
spellingShingle |
Baltic Shield Continental break-up Craton Ice Age Lithosphere Rifting Thermal state Pascal, Christophe Balling, Niels Heat flow of northern Norway, new data and geodynamic implications |
topic_facet |
Baltic Shield Continental break-up Craton Ice Age Lithosphere Rifting Thermal state |
description |
The present contribution introduces new heat flow data from northern Norway, a region of the Baltic Shied and Scandinavian Caledonides that has been poorly covered until now. We computed heat flow values based on data gathered in ten boreholes reaching total depths ranging between ∼390 m and 960 m below ground level. Abundant core material for five of the studied boreholes allowed for precise determination of thermal conductivity profiles. The new determinations represent significant improvement with respect to the few pre-existing heat flow values that were based on shallow drillholes and lake measurements. The obtained heat flow values range between ∼40 and 70 mW/m 2 , after corrections, and suggest significant heat flow decrease (i.e. ∼10–20 mW/m 2 ) from chiefly Proterozoic terrains to the Archean nucleus in NE Norway. The results suggest also sharp decrease in heat flow from the NE Atlantic to the Lofoten-Vesterålen margin but rather smooth gradients from the Barents Shelf to the continent. The former may be associated with abrupt deepening of the base of the lithosphere below the Lofoten-Vesterålen margin, as already suggested by previous seismic tomography studies and consistent with drastic strain focusing and the formation of a narrow margin. In contrast, gradual deepening of the base lithosphere towards the continent appears to be in agreement with the observed diffuse deformation that took place in the comparatively wide Western Barents Shelf. |
format |
Article in Journal/Newspaper |
author |
Pascal, Christophe Balling, Niels |
author_facet |
Pascal, Christophe Balling, Niels |
author_sort |
Pascal, Christophe |
title |
Heat flow of northern Norway, new data and geodynamic implications |
title_short |
Heat flow of northern Norway, new data and geodynamic implications |
title_full |
Heat flow of northern Norway, new data and geodynamic implications |
title_fullStr |
Heat flow of northern Norway, new data and geodynamic implications |
title_full_unstemmed |
Heat flow of northern Norway, new data and geodynamic implications |
title_sort |
heat flow of northern norway, new data and geodynamic implications |
publishDate |
2023 |
url |
https://pure.au.dk/portal/da/publications/heat-flow-of-northern-norway-new-data-and-geodynamic-implications(ac2e37bd-8b5f-4c5d-80af-f1b6fe657732).html https://doi.org/10.1016/j.tecto.2023.230067 http://www.scopus.com/inward/record.url?scp=85174154605&partnerID=8YFLogxK |
long_lat |
ENVELOPE(14.939,14.939,68.754,68.754) |
geographic |
Lofoten Norway Vesterålen |
geographic_facet |
Lofoten Norway Vesterålen |
genre |
Lofoten Northern Norway Vesterålen |
genre_facet |
Lofoten Northern Norway Vesterålen |
op_source |
Pascal , C & Balling , N 2023 , ' Heat flow of northern Norway, new data and geodynamic implications ' , Tectonophysics , vol. 867 , 230067 . https://doi.org/10.1016/j.tecto.2023.230067 |
op_relation |
https://pure.au.dk/portal/da/publications/heat-flow-of-northern-norway-new-data-and-geodynamic-implications(ac2e37bd-8b5f-4c5d-80af-f1b6fe657732).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.tecto.2023.230067 |
container_title |
Tectonophysics |
container_volume |
867 |
container_start_page |
230067 |
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1784895656368799744 |