Geophysical properties of the crust and upper mantle of the ocean-continent transition in Svalbard area
This paper presents a review of geophysical studies of the crust and the lithosphere- asthenosphere boundary (LAB) in the ocean-continent transition in the area of Spitsbergen (Svalbard Archipelago) in high Arctic. Over last decades many investigations were performed during Polish geophysical expedi...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Polish Academy of Sciences
2020
|
Subjects: | |
Online Access: | https://doi.org/10.24425/ppr.2020.132567 https://doaj.org/article/4b4a229cde974268a56368a92cf0df8b |
id |
ftdoajarticles:oai:doaj.org/article:4b4a229cde974268a56368a92cf0df8b |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:4b4a229cde974268a56368a92cf0df8b 2023-05-15T14:58:31+02:00 Geophysical properties of the crust and upper mantle of the ocean-continent transition in Svalbard area Grad Marek Majorowicz Jacek 2020-02-01T00:00:00Z https://doi.org/10.24425/ppr.2020.132567 https://doaj.org/article/4b4a229cde974268a56368a92cf0df8b EN eng Polish Academy of Sciences http://journals.pan.pl/dlibra/publication/132567/edition/115831/content https://doaj.org/toc/2081-8262 doi:10.24425/ppr.2020.132567 2081-8262 https://doaj.org/article/4b4a229cde974268a56368a92cf0df8b Polish Polar Research, Vol 41, Iss 1, Pp 1-22 (2020) arctic spitsbergen seismic modelling gravity modelling thermal modelling lithosphere−asthenosphere boundary Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.24425/ppr.2020.132567 2022-12-30T23:46:57Z This paper presents a review of geophysical studies of the crust and the lithosphere- asthenosphere boundary (LAB) in the ocean-continent transition in the area of Spitsbergen (Svalbard Archipelago) in high Arctic. Over last decades many investigations were performed during Polish geophysical expeditions, as well as in the framework of international cooperation with scientists from Germany, Japan, Norway and USA. We compiled here existing seismic, gravity and thermal models down to LAB depth along the 800 km long transect extending from the actively spreading Knipovich Ridge, across southern Spitsbergen to the Kong Karls Land Volcanic Province. The results of all methods are very consistent, although they are sensitive to different physical parameters: seismic wave velocities, densities and thermal. The thinnest lithosphere of only 12 km is found beneath the Knipovich Ridge. Only 50 km to the west and 50 km to the east of the ridge the LAB depth increases to about 30 km, and this value corresponds to the oceanic structure of the North Atlantic Ocean. Beneath southern Spitsbergen the LAB depth is about 55 km and increases to 90–100 km beneath continental structure of the Barents Sea. The uplift of the LAB close to distance of 700 km along transect could be correlated with Kong Karls Land Volcanic Province. Article in Journal/Newspaper Arctic Barents Sea Kong Karls Land North Atlantic Polar Research Svalbard Spitsbergen Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Barents Sea Svalbard Archipelago Norway Knipovich Ridge ENVELOPE(7.074,7.074,75.712,75.712) Kong Karls Land ENVELOPE(28.000,28.000,78.833,78.833) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
arctic spitsbergen seismic modelling gravity modelling thermal modelling lithosphere−asthenosphere boundary Geology QE1-996.5 |
spellingShingle |
arctic spitsbergen seismic modelling gravity modelling thermal modelling lithosphere−asthenosphere boundary Geology QE1-996.5 Grad Marek Majorowicz Jacek Geophysical properties of the crust and upper mantle of the ocean-continent transition in Svalbard area |
topic_facet |
arctic spitsbergen seismic modelling gravity modelling thermal modelling lithosphere−asthenosphere boundary Geology QE1-996.5 |
description |
This paper presents a review of geophysical studies of the crust and the lithosphere- asthenosphere boundary (LAB) in the ocean-continent transition in the area of Spitsbergen (Svalbard Archipelago) in high Arctic. Over last decades many investigations were performed during Polish geophysical expeditions, as well as in the framework of international cooperation with scientists from Germany, Japan, Norway and USA. We compiled here existing seismic, gravity and thermal models down to LAB depth along the 800 km long transect extending from the actively spreading Knipovich Ridge, across southern Spitsbergen to the Kong Karls Land Volcanic Province. The results of all methods are very consistent, although they are sensitive to different physical parameters: seismic wave velocities, densities and thermal. The thinnest lithosphere of only 12 km is found beneath the Knipovich Ridge. Only 50 km to the west and 50 km to the east of the ridge the LAB depth increases to about 30 km, and this value corresponds to the oceanic structure of the North Atlantic Ocean. Beneath southern Spitsbergen the LAB depth is about 55 km and increases to 90–100 km beneath continental structure of the Barents Sea. The uplift of the LAB close to distance of 700 km along transect could be correlated with Kong Karls Land Volcanic Province. |
format |
Article in Journal/Newspaper |
author |
Grad Marek Majorowicz Jacek |
author_facet |
Grad Marek Majorowicz Jacek |
author_sort |
Grad Marek |
title |
Geophysical properties of the crust and upper mantle of the ocean-continent transition in Svalbard area |
title_short |
Geophysical properties of the crust and upper mantle of the ocean-continent transition in Svalbard area |
title_full |
Geophysical properties of the crust and upper mantle of the ocean-continent transition in Svalbard area |
title_fullStr |
Geophysical properties of the crust and upper mantle of the ocean-continent transition in Svalbard area |
title_full_unstemmed |
Geophysical properties of the crust and upper mantle of the ocean-continent transition in Svalbard area |
title_sort |
geophysical properties of the crust and upper mantle of the ocean-continent transition in svalbard area |
publisher |
Polish Academy of Sciences |
publishDate |
2020 |
url |
https://doi.org/10.24425/ppr.2020.132567 https://doaj.org/article/4b4a229cde974268a56368a92cf0df8b |
long_lat |
ENVELOPE(7.074,7.074,75.712,75.712) ENVELOPE(28.000,28.000,78.833,78.833) |
geographic |
Arctic Svalbard Barents Sea Svalbard Archipelago Norway Knipovich Ridge Kong Karls Land |
geographic_facet |
Arctic Svalbard Barents Sea Svalbard Archipelago Norway Knipovich Ridge Kong Karls Land |
genre |
Arctic Barents Sea Kong Karls Land North Atlantic Polar Research Svalbard Spitsbergen |
genre_facet |
Arctic Barents Sea Kong Karls Land North Atlantic Polar Research Svalbard Spitsbergen |
op_source |
Polish Polar Research, Vol 41, Iss 1, Pp 1-22 (2020) |
op_relation |
http://journals.pan.pl/dlibra/publication/132567/edition/115831/content https://doaj.org/toc/2081-8262 doi:10.24425/ppr.2020.132567 2081-8262 https://doaj.org/article/4b4a229cde974268a56368a92cf0df8b |
op_doi |
https://doi.org/10.24425/ppr.2020.132567 |
_version_ |
1766330662193725440 |