KONTIKI Final Report, CONTInental Crust and Heat Generation In 3D
The KONTIKI final report summarises the results from the three-year KONTIKI project (CONTInental Crust and Heat Generation In 3D) established by NGU and StatoilHydro to improve the understanding of heat flow along the Norwegian continental margin. A compilation of c. 4000 new and old geochemical dat...
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ftnorgesgu:oai:openarchive.ngu.no:11250/2664766 2023-05-15T17:24:37+02:00 KONTIKI Final Report, CONTInental Crust and Heat Generation In 3D Olesen, Odleiv TROMS NORDLAND TRØNDELAG MØRE OG ROMSDAL VESTLAND INNLANDET VIKEN 2008 application/pdf https://hdl.handle.net/11250/2664766 eng eng NGU-Rapport (2007.042) (306600) Kontiki - Continental Crust and Heat Generation in 3D urn:issn:0800-3416 https://hdl.handle.net/11250/2664766 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 438 s. GEOFYSIKK BERGGRUNNSGEOLOGI GRAVIMETRI KONTINENTALSOKKEL MAGNETOMETRI PETROFYSIKK TOLKNING Report 2008 ftnorgesgu 2022-07-03T15:26:07Z The KONTIKI final report summarises the results from the three-year KONTIKI project (CONTInental Crust and Heat Generation In 3D) established by NGU and StatoilHydro to improve the understanding of heat flow along the Norwegian continental margin. A compilation of c. 4000 new and old geochemical data is used to produce the first map of radiogenic heat production in bedrock, covering large tracts of Norway. In general granitic rocks have higher heat production than intermediate and mafic rocks. Sedimentary rocks display variation in heat production that can be ascribed to sedimentary processes. Age and metamorphic grade do not appear to affect heat production significantly, whereas tectonic setting appears to impart some effect in that extensional or within-plate rocks have higher heat production than similar rocks formed along plate margins. A total of 11 deep wells (c. 350-1000 m) have been established for temperature logging and heat flow calculations in mainland Norway. Calculated palaeoclimatic corrections range fro +2 to +9 mW\/m2 (i.e. 5-20% of original heat flow values). The new heat flow map shows that heat flow values in Norway are much higher than previously proposed. The two most robust features on the map are the relatively high and low heat flows in the Oslo Region and Nordland respectively. New geochronological data from basement samples from the North Sea and Norwegian Sea show that the upper basement to a large degree consists of magmatic and metasedimentary rocks that can be correlated with rocks in tectonostratigraphically high (i.e. Upper and Uppermost Allochthons) nappes within the Scandinavian Caledonides. Both 3D crustal and thermal models have been produced from the Mid-Norwegian continental margin. Our 3D modelling suggests that substantial heat flow variations between 35 and 65 mW\/m2 occur at the base of the sedimentary basins in the inner parts of the mid-Norwegian Margin. We show that the structure and nature of the basement underlying these basins are the most likely factors ... Report Nordland Nordland Norwegian Sea Nordland Troms NGU Open Archive (Geological Survey of Norway) Norway Norwegian Sea Viken ENVELOPE(19.395,19.395,69.232,69.232) |
institution |
Open Polar |
collection |
NGU Open Archive (Geological Survey of Norway) |
op_collection_id |
ftnorgesgu |
language |
English |
topic |
GEOFYSIKK BERGGRUNNSGEOLOGI GRAVIMETRI KONTINENTALSOKKEL MAGNETOMETRI PETROFYSIKK TOLKNING |
spellingShingle |
GEOFYSIKK BERGGRUNNSGEOLOGI GRAVIMETRI KONTINENTALSOKKEL MAGNETOMETRI PETROFYSIKK TOLKNING Olesen, Odleiv KONTIKI Final Report, CONTInental Crust and Heat Generation In 3D |
topic_facet |
GEOFYSIKK BERGGRUNNSGEOLOGI GRAVIMETRI KONTINENTALSOKKEL MAGNETOMETRI PETROFYSIKK TOLKNING |
description |
The KONTIKI final report summarises the results from the three-year KONTIKI project (CONTInental Crust and Heat Generation In 3D) established by NGU and StatoilHydro to improve the understanding of heat flow along the Norwegian continental margin. A compilation of c. 4000 new and old geochemical data is used to produce the first map of radiogenic heat production in bedrock, covering large tracts of Norway. In general granitic rocks have higher heat production than intermediate and mafic rocks. Sedimentary rocks display variation in heat production that can be ascribed to sedimentary processes. Age and metamorphic grade do not appear to affect heat production significantly, whereas tectonic setting appears to impart some effect in that extensional or within-plate rocks have higher heat production than similar rocks formed along plate margins. A total of 11 deep wells (c. 350-1000 m) have been established for temperature logging and heat flow calculations in mainland Norway. Calculated palaeoclimatic corrections range fro +2 to +9 mW\/m2 (i.e. 5-20% of original heat flow values). The new heat flow map shows that heat flow values in Norway are much higher than previously proposed. The two most robust features on the map are the relatively high and low heat flows in the Oslo Region and Nordland respectively. New geochronological data from basement samples from the North Sea and Norwegian Sea show that the upper basement to a large degree consists of magmatic and metasedimentary rocks that can be correlated with rocks in tectonostratigraphically high (i.e. Upper and Uppermost Allochthons) nappes within the Scandinavian Caledonides. Both 3D crustal and thermal models have been produced from the Mid-Norwegian continental margin. Our 3D modelling suggests that substantial heat flow variations between 35 and 65 mW\/m2 occur at the base of the sedimentary basins in the inner parts of the mid-Norwegian Margin. We show that the structure and nature of the basement underlying these basins are the most likely factors ... |
format |
Report |
author |
Olesen, Odleiv |
author_facet |
Olesen, Odleiv |
author_sort |
Olesen, Odleiv |
title |
KONTIKI Final Report, CONTInental Crust and Heat Generation In 3D |
title_short |
KONTIKI Final Report, CONTInental Crust and Heat Generation In 3D |
title_full |
KONTIKI Final Report, CONTInental Crust and Heat Generation In 3D |
title_fullStr |
KONTIKI Final Report, CONTInental Crust and Heat Generation In 3D |
title_full_unstemmed |
KONTIKI Final Report, CONTInental Crust and Heat Generation In 3D |
title_sort |
kontiki final report, continental crust and heat generation in 3d |
publishDate |
2008 |
url |
https://hdl.handle.net/11250/2664766 |
op_coverage |
TROMS NORDLAND TRØNDELAG MØRE OG ROMSDAL VESTLAND INNLANDET VIKEN |
long_lat |
ENVELOPE(19.395,19.395,69.232,69.232) |
geographic |
Norway Norwegian Sea Viken |
geographic_facet |
Norway Norwegian Sea Viken |
genre |
Nordland Nordland Norwegian Sea Nordland Troms |
genre_facet |
Nordland Nordland Norwegian Sea Nordland Troms |
op_source |
438 s. |
op_relation |
NGU-Rapport (2007.042) (306600) Kontiki - Continental Crust and Heat Generation in 3D urn:issn:0800-3416 https://hdl.handle.net/11250/2664766 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
_version_ |
1766115730065981440 |