Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability
The best known submarine landslides on the glaciated NW European continental margins are those at the front of cross-shelf troughs, where the alternation of rapidly deposited glycogenic and hemi pelagic material generates sedimentary overpressure. Here, we investigate landslides in two areas built o...
Published in: | Marine Geology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | https://pure.au.dk/portal/en/publications/cfeb0004-5381-4897-919e-d6ae7edd1c00 https://doi.org/10.1016/j.margeo.2016.11.003 http://www.scopus.com/inward/record.url?scp=85008478205&partnerID=8YFLogxK |
id |
ftuniaarhuspubl:oai:pure.atira.dk:publications/cfeb0004-5381-4897-919e-d6ae7edd1c00 |
---|---|
record_format |
openpolar |
spelling |
ftuniaarhuspubl:oai:pure.atira.dk:publications/cfeb0004-5381-4897-919e-d6ae7edd1c00 2024-02-04T10:00:27+01:00 Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability Elger, Judith Berndt, Christian Krastel, Sebastian Piper, David J.W. Gross, Felix Geissler, Wolfram H. 2017-11-01 https://pure.au.dk/portal/en/publications/cfeb0004-5381-4897-919e-d6ae7edd1c00 https://doi.org/10.1016/j.margeo.2016.11.003 http://www.scopus.com/inward/record.url?scp=85008478205&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/cfeb0004-5381-4897-919e-d6ae7edd1c00 info:eu-repo/semantics/restrictedAccess Elger , J , Berndt , C , Krastel , S , Piper , D J W , Gross , F & Geissler , W H 2017 , ' Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability ' , Marine Geology , vol. 393 , pp. 141-155 . https://doi.org/10.1016/j.margeo.2016.11.003 Fram Strait Gas hydrates Pre-conditioning Slope stability Submarine landslides Svalbard continental margin Trigger mechanisms article 2017 ftuniaarhuspubl https://doi.org/10.1016/j.margeo.2016.11.003 2024-01-11T00:03:30Z The best known submarine landslides on the glaciated NW European continental margins are those at the front of cross-shelf troughs, where the alternation of rapidly deposited glycogenic and hemi pelagic material generates sedimentary overpressure. Here, we investigate landslides in two areas built of contourite drifts bounded seaward by a ridge-transform junction. Seismic and bathymetric data from the Fram Slide Complex are compared with the tectonically similar Vastness area ~ 120 km to the south, to analyze the influence of local and regional processes on slope stability. These processes include tectonic activity, changes of climate and oceanography, gas hydrates and fluid migration systems, slope gradient, toe erosion and style of contourite deposition. Two areas within the Fram Slide Complex underwent different phases of slope failures, whereas there is no evidence at all for major slope failures in the Vastness area. The comparison cannot reveal the distinct reason for slope failure but demonstrates the strong impact of variation in the local controls on slope stability. The different failure chronologies suggest that toe erosion, which is dependent on the throw of normal faults, and the different thickness and geometry of contourite deposits can result in a critical slope morphology and exert pronounced effects on slope stability. These results highlight the limitations of regional hazard assessments and the need for multi-disciplinary investigations, as small differences in local controlling factors led to substantially different slope failure histories. Article in Journal/Newspaper Fram Strait Svalbard Aarhus University: Research Svalbard Marine Geology 393 141 155 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Fram Strait Gas hydrates Pre-conditioning Slope stability Submarine landslides Svalbard continental margin Trigger mechanisms |
spellingShingle |
Fram Strait Gas hydrates Pre-conditioning Slope stability Submarine landslides Svalbard continental margin Trigger mechanisms Elger, Judith Berndt, Christian Krastel, Sebastian Piper, David J.W. Gross, Felix Geissler, Wolfram H. Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability |
topic_facet |
Fram Strait Gas hydrates Pre-conditioning Slope stability Submarine landslides Svalbard continental margin Trigger mechanisms |
description |
The best known submarine landslides on the glaciated NW European continental margins are those at the front of cross-shelf troughs, where the alternation of rapidly deposited glycogenic and hemi pelagic material generates sedimentary overpressure. Here, we investigate landslides in two areas built of contourite drifts bounded seaward by a ridge-transform junction. Seismic and bathymetric data from the Fram Slide Complex are compared with the tectonically similar Vastness area ~ 120 km to the south, to analyze the influence of local and regional processes on slope stability. These processes include tectonic activity, changes of climate and oceanography, gas hydrates and fluid migration systems, slope gradient, toe erosion and style of contourite deposition. Two areas within the Fram Slide Complex underwent different phases of slope failures, whereas there is no evidence at all for major slope failures in the Vastness area. The comparison cannot reveal the distinct reason for slope failure but demonstrates the strong impact of variation in the local controls on slope stability. The different failure chronologies suggest that toe erosion, which is dependent on the throw of normal faults, and the different thickness and geometry of contourite deposits can result in a critical slope morphology and exert pronounced effects on slope stability. These results highlight the limitations of regional hazard assessments and the need for multi-disciplinary investigations, as small differences in local controlling factors led to substantially different slope failure histories. |
format |
Article in Journal/Newspaper |
author |
Elger, Judith Berndt, Christian Krastel, Sebastian Piper, David J.W. Gross, Felix Geissler, Wolfram H. |
author_facet |
Elger, Judith Berndt, Christian Krastel, Sebastian Piper, David J.W. Gross, Felix Geissler, Wolfram H. |
author_sort |
Elger, Judith |
title |
Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability |
title_short |
Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability |
title_full |
Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability |
title_fullStr |
Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability |
title_full_unstemmed |
Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability |
title_sort |
chronology of the fram slide complex offshore nw svalbard and its implications for local and regional slope stability |
publishDate |
2017 |
url |
https://pure.au.dk/portal/en/publications/cfeb0004-5381-4897-919e-d6ae7edd1c00 https://doi.org/10.1016/j.margeo.2016.11.003 http://www.scopus.com/inward/record.url?scp=85008478205&partnerID=8YFLogxK |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Fram Strait Svalbard |
genre_facet |
Fram Strait Svalbard |
op_source |
Elger , J , Berndt , C , Krastel , S , Piper , D J W , Gross , F & Geissler , W H 2017 , ' Chronology of the Fram Slide Complex offshore NW Svalbard and its implications for local and regional slope stability ' , Marine Geology , vol. 393 , pp. 141-155 . https://doi.org/10.1016/j.margeo.2016.11.003 |
op_relation |
https://pure.au.dk/portal/en/publications/cfeb0004-5381-4897-919e-d6ae7edd1c00 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.margeo.2016.11.003 |
container_title |
Marine Geology |
container_volume |
393 |
container_start_page |
141 |
op_container_end_page |
155 |
_version_ |
1789965754284638208 |