Flow behaviour of the submarine glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea
Using 3·5 kHz high‐resolution seismic data, gravity cores and side‐scan sonar imagery, the flow behaviour of submarine, glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea was studied. During their downslope movement, the sediments within the uppermost part of the debris...
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Online Access: | http://dx.doi.org/10.1046/j.1365-3091.2000.00343.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-3091.2000.00343.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-3091.2000.00343.x |
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crwiley:10.1046/j.1365-3091.2000.00343.x 2024-09-15T17:57:52+00:00 Flow behaviour of the submarine glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea Laberg, Jan Sverre Vorren, Tore O. 2000 http://dx.doi.org/10.1046/j.1365-3091.2000.00343.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-3091.2000.00343.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-3091.2000.00343.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Sedimentology volume 47, issue 6, page 1105-1117 ISSN 0037-0746 1365-3091 journal-article 2000 crwiley https://doi.org/10.1046/j.1365-3091.2000.00343.x 2024-08-01T04:21:57Z Using 3·5 kHz high‐resolution seismic data, gravity cores and side‐scan sonar imagery, the flow behaviour of submarine, glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea was studied. During their downslope movement, the sediments within the uppermost part of the debris flows (<3 m) are inferred to have been deformed as a result of the shear stress at the debris–water interface. Thus, the uppermost part of the flow did not move downslope as a rigid plug. If present, a rigid part of the flow was located at least some metres below the surface. At c . 1000 to at least 1600 m water depth, the debris flows eroded and probably incorporated substrate debris. Further downslope, the debris flows moved passively over substrate sediments. The hypothesis of hydroplaning of the debris flow front may explain why the debris flows moved across the lower fan without affecting the underlying sediments. Detailed morphological information from the surface of one of the debris flow deposits reveals arcuate ridges. These features were probably formed by flow surge. Hydroplaning of the debris flow front may also explain the formation of flow surge. The long runout distance of some of the large debris flows could be due to accretion of material to the base of the debris flow, thereby increasing in volume during flow, and/or to hydroplaning suppressing deceleration of the flow. Article in Journal/Newspaper Barents Sea Bear Island Wiley Online Library Sedimentology 47 6 1105 1117 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Using 3·5 kHz high‐resolution seismic data, gravity cores and side‐scan sonar imagery, the flow behaviour of submarine, glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea was studied. During their downslope movement, the sediments within the uppermost part of the debris flows (<3 m) are inferred to have been deformed as a result of the shear stress at the debris–water interface. Thus, the uppermost part of the flow did not move downslope as a rigid plug. If present, a rigid part of the flow was located at least some metres below the surface. At c . 1000 to at least 1600 m water depth, the debris flows eroded and probably incorporated substrate debris. Further downslope, the debris flows moved passively over substrate sediments. The hypothesis of hydroplaning of the debris flow front may explain why the debris flows moved across the lower fan without affecting the underlying sediments. Detailed morphological information from the surface of one of the debris flow deposits reveals arcuate ridges. These features were probably formed by flow surge. Hydroplaning of the debris flow front may also explain the formation of flow surge. The long runout distance of some of the large debris flows could be due to accretion of material to the base of the debris flow, thereby increasing in volume during flow, and/or to hydroplaning suppressing deceleration of the flow. |
format |
Article in Journal/Newspaper |
author |
Laberg, Jan Sverre Vorren, Tore O. |
spellingShingle |
Laberg, Jan Sverre Vorren, Tore O. Flow behaviour of the submarine glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea |
author_facet |
Laberg, Jan Sverre Vorren, Tore O. |
author_sort |
Laberg, Jan Sverre |
title |
Flow behaviour of the submarine glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea |
title_short |
Flow behaviour of the submarine glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea |
title_full |
Flow behaviour of the submarine glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea |
title_fullStr |
Flow behaviour of the submarine glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea |
title_full_unstemmed |
Flow behaviour of the submarine glacigenic debris flows on the Bear Island Trough Mouth Fan, western Barents Sea |
title_sort |
flow behaviour of the submarine glacigenic debris flows on the bear island trough mouth fan, western barents sea |
publisher |
Wiley |
publishDate |
2000 |
url |
http://dx.doi.org/10.1046/j.1365-3091.2000.00343.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-3091.2000.00343.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-3091.2000.00343.x |
genre |
Barents Sea Bear Island |
genre_facet |
Barents Sea Bear Island |
op_source |
Sedimentology volume 47, issue 6, page 1105-1117 ISSN 0037-0746 1365-3091 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-3091.2000.00343.x |
container_title |
Sedimentology |
container_volume |
47 |
container_issue |
6 |
container_start_page |
1105 |
op_container_end_page |
1117 |
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1810434075050115072 |