Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea
Many of the Earth’s sedimentary basins are affected by glaciations. Repeated glaciations over millions of years may have had a significant effect on the physical conditions in sedimentary basins and on basin structuring. This paper presents some of the major effects that ice sheets might have on sed...
Published in: | Geosciences |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2019
|
Subjects: | |
Online Access: | https://doi.org/10.3390/geosciences9110474 |
id |
ftmdpi:oai:mdpi.com:/2076-3263/9/11/474/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/2076-3263/9/11/474/ 2023-08-20T04:05:30+02:00 Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea Ingrid F. Løtveit Willy Fjeldskaar Magnhild Sydnes agris 2019-11-11 application/pdf https://doi.org/10.3390/geosciences9110474 EN eng Multidisciplinary Digital Publishing Institute Structural Geology and Tectonics https://dx.doi.org/10.3390/geosciences9110474 https://creativecommons.org/licenses/by/4.0/ Geosciences; Volume 9; Issue 11; Pages: 474 Glaciations isostasy flexural stress faults hydrocarbon migration Text 2019 ftmdpi https://doi.org/10.3390/geosciences9110474 2023-07-31T22:46:56Z Many of the Earth’s sedimentary basins are affected by glaciations. Repeated glaciations over millions of years may have had a significant effect on the physical conditions in sedimentary basins and on basin structuring. This paper presents some of the major effects that ice sheets might have on sedimentary basins, and includes examples of quantifications of their significance. Among the most important effects are movements of the solid Earth caused by glacial loading and unloading, and the related flexural stresses. The driving factor of these movements is isostasy. Most of the production licenses on the Norwegian Continental Shelf are located inside the margin of the former Last Glacial Maximum (LGM) ice sheet. Isostatic modeling shows that sedimentary basins near the former ice margin can be tilted as much as 3 m/km which might significantly alter pathways of hydrocarbon migration. In an example from the SW Barents Sea we show that flexural stresses related to the isostatic uplift after LGM deglaciation can produce stress changes large enough to result in increased fracture-related permeability in the sedimentary basin, and lead to potential spillage of hydrocarbons out of potential reservoirs. The results demonstrate that future basin modeling should consider including the loading effect of glaciations when dealing with petroleum potential in former glaciated areas. Text Barents Sea Ice Sheet MDPI Open Access Publishing Barents Sea Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Geosciences 9 11 474 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Glaciations isostasy flexural stress faults hydrocarbon migration |
spellingShingle |
Glaciations isostasy flexural stress faults hydrocarbon migration Ingrid F. Løtveit Willy Fjeldskaar Magnhild Sydnes Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea |
topic_facet |
Glaciations isostasy flexural stress faults hydrocarbon migration |
description |
Many of the Earth’s sedimentary basins are affected by glaciations. Repeated glaciations over millions of years may have had a significant effect on the physical conditions in sedimentary basins and on basin structuring. This paper presents some of the major effects that ice sheets might have on sedimentary basins, and includes examples of quantifications of their significance. Among the most important effects are movements of the solid Earth caused by glacial loading and unloading, and the related flexural stresses. The driving factor of these movements is isostasy. Most of the production licenses on the Norwegian Continental Shelf are located inside the margin of the former Last Glacial Maximum (LGM) ice sheet. Isostatic modeling shows that sedimentary basins near the former ice margin can be tilted as much as 3 m/km which might significantly alter pathways of hydrocarbon migration. In an example from the SW Barents Sea we show that flexural stresses related to the isostatic uplift after LGM deglaciation can produce stress changes large enough to result in increased fracture-related permeability in the sedimentary basin, and lead to potential spillage of hydrocarbons out of potential reservoirs. The results demonstrate that future basin modeling should consider including the loading effect of glaciations when dealing with petroleum potential in former glaciated areas. |
format |
Text |
author |
Ingrid F. Løtveit Willy Fjeldskaar Magnhild Sydnes |
author_facet |
Ingrid F. Løtveit Willy Fjeldskaar Magnhild Sydnes |
author_sort |
Ingrid F. Løtveit |
title |
Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea |
title_short |
Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea |
title_full |
Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea |
title_fullStr |
Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea |
title_full_unstemmed |
Tilting and Flexural Stresses in Basins Due to Glaciations—An Example from the Barents Sea |
title_sort |
tilting and flexural stresses in basins due to glaciations—an example from the barents sea |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/geosciences9110474 |
op_coverage |
agris |
long_lat |
ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Barents Sea Tilting |
geographic_facet |
Barents Sea Tilting |
genre |
Barents Sea Ice Sheet |
genre_facet |
Barents Sea Ice Sheet |
op_source |
Geosciences; Volume 9; Issue 11; Pages: 474 |
op_relation |
Structural Geology and Tectonics https://dx.doi.org/10.3390/geosciences9110474 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/geosciences9110474 |
container_title |
Geosciences |
container_volume |
9 |
container_issue |
11 |
container_start_page |
474 |
_version_ |
1774716043346837504 |