Mass-movements on the continental slope offshore Lofoten, Northern Norway
The papers of this thesis are not available in Munin: 1. Nicole J. Baeten, Jan Sverre Laberg, Matthias Forwick, Tore O. Vorren, Maarten Vanneste, Carl Fredrik Forsberg, Tore J. Kvalstad, Michael Ivanov: 'Morphology and origin of smaller-scale mass movements on the continental slope off northern...
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Universitetet i Tromsø
2013
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ftunivtroemsoe:oai:munin.uit.no:10037/5506 2023-05-15T17:08:15+02:00 Mass-movements on the continental slope offshore Lofoten, Northern Norway Baeten, Nicole Jeanne 2013-09-20 https://hdl.handle.net/10037/5506 eng eng Universitetet i Tromsø University of Tromsø 978-82-8236-105-7 https://hdl.handle.net/10037/5506 URN:NBN:no-uit_munin_5206 openAccess Copyright 2013 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 DOKTOR-004 Doctoral thesis Doktorgradsavhandling 2013 ftunivtroemsoe 2021-06-25T17:53:40Z The papers of this thesis are not available in Munin: 1. Nicole J. Baeten, Jan Sverre Laberg, Matthias Forwick, Tore O. Vorren, Maarten Vanneste, Carl Fredrik Forsberg, Tore J. Kvalstad, Michael Ivanov: 'Morphology and origin of smaller-scale mass movements on the continental slope off northern Norway', Geomorphology(2013), vol.187:122-134, available at http://dx.doi.org/10.1016/j.geomorph.2013.01.008 2. Nicole J. Baeten, Jan Sverre Laberg, Matthias Forwick, Tore O. Vorren, Maarten Vanneste, Carl Fredrik Forsberg, Tore J. Kvalstad, Haflidi Haflidason: 'Origin of shallow submarine mass movements and their glide plane - sedimentological and geotechnical analyses from the continental slope off northern Norway' (manuscript) 3. Nicole J. Baeten, Jan Sverre Laberg, Matthias Forwick, Tore O. Vorren, Maarten Vanneste, Carl Fredrik Forsberg: 'Neogene - Quaternary contourite-drift growth and mass-movement activity on the continental slope offshore Lofoten, northern Norway'(manuscript) Swath bathymetry, side-scan sonar, sub-bottom profiler and seismic data from the continental slope offshore the Lofoten Islands, northern Norway reveal smaller-scale mass movements in water depths between 1100 and 2500 m. These mass movements have volumes of 0.061 to 8.7 km3 and are interpreted as translational slides involving spreading and multi-phase retrogression. The spatial variation in failure style is inferred to have been caused by the activation of different glideplanes (12.5-130 mbsf) within the thicker and more mounded contouritic deposits in the north-east of the study area. Data from a sediment core show that the shallowest style of mass movement (12.5 mbsf), was initiated within contouritic sediments characterized by high sensitivities and water contents. This unit overlies a plumite interval characterized by dilative behavior with pore pressure decrease with increasing shear strain and high undrained shear strength. As such, it is the difference in geotechnical properties which indicates that the interface between these units acts as the basal glide plane, with deformation in the weaker overlying unit. The mass movements in the study area are inferred to have been triggered by undercutting and removal of support at the foot of the slope due to large-scale mass movements that have occurred immediately south of the study area, such as the Trænadjupet or Nyk slides. Furthermore, a network of 2D seismic data reveals the presence of several paleo-canyons. The data illustrate that canyon formation is more extensive then previously thought. These paleo-canyons are buried by an extensive contourite drift interpreted to be a continuation of the Lofoten Drift. The distribution of the drift indicates changes in the depth and strength of paleo-currents. Mass movements only occur in the upper part of the sequence, most likely after the onset of the Pleistocene. Doctoral or Postdoctoral Thesis Lofoten Northern Norway University of Tromsø: Munin Open Research Archive Laberg ENVELOPE(17.820,17.820,68.862,68.862) Lofoten Norway |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 DOKTOR-004 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 DOKTOR-004 Baeten, Nicole Jeanne Mass-movements on the continental slope offshore Lofoten, Northern Norway |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 DOKTOR-004 |
description |
The papers of this thesis are not available in Munin: 1. Nicole J. Baeten, Jan Sverre Laberg, Matthias Forwick, Tore O. Vorren, Maarten Vanneste, Carl Fredrik Forsberg, Tore J. Kvalstad, Michael Ivanov: 'Morphology and origin of smaller-scale mass movements on the continental slope off northern Norway', Geomorphology(2013), vol.187:122-134, available at http://dx.doi.org/10.1016/j.geomorph.2013.01.008 2. Nicole J. Baeten, Jan Sverre Laberg, Matthias Forwick, Tore O. Vorren, Maarten Vanneste, Carl Fredrik Forsberg, Tore J. Kvalstad, Haflidi Haflidason: 'Origin of shallow submarine mass movements and their glide plane - sedimentological and geotechnical analyses from the continental slope off northern Norway' (manuscript) 3. Nicole J. Baeten, Jan Sverre Laberg, Matthias Forwick, Tore O. Vorren, Maarten Vanneste, Carl Fredrik Forsberg: 'Neogene - Quaternary contourite-drift growth and mass-movement activity on the continental slope offshore Lofoten, northern Norway'(manuscript) Swath bathymetry, side-scan sonar, sub-bottom profiler and seismic data from the continental slope offshore the Lofoten Islands, northern Norway reveal smaller-scale mass movements in water depths between 1100 and 2500 m. These mass movements have volumes of 0.061 to 8.7 km3 and are interpreted as translational slides involving spreading and multi-phase retrogression. The spatial variation in failure style is inferred to have been caused by the activation of different glideplanes (12.5-130 mbsf) within the thicker and more mounded contouritic deposits in the north-east of the study area. Data from a sediment core show that the shallowest style of mass movement (12.5 mbsf), was initiated within contouritic sediments characterized by high sensitivities and water contents. This unit overlies a plumite interval characterized by dilative behavior with pore pressure decrease with increasing shear strain and high undrained shear strength. As such, it is the difference in geotechnical properties which indicates that the interface between these units acts as the basal glide plane, with deformation in the weaker overlying unit. The mass movements in the study area are inferred to have been triggered by undercutting and removal of support at the foot of the slope due to large-scale mass movements that have occurred immediately south of the study area, such as the Trænadjupet or Nyk slides. Furthermore, a network of 2D seismic data reveals the presence of several paleo-canyons. The data illustrate that canyon formation is more extensive then previously thought. These paleo-canyons are buried by an extensive contourite drift interpreted to be a continuation of the Lofoten Drift. The distribution of the drift indicates changes in the depth and strength of paleo-currents. Mass movements only occur in the upper part of the sequence, most likely after the onset of the Pleistocene. |
format |
Doctoral or Postdoctoral Thesis |
author |
Baeten, Nicole Jeanne |
author_facet |
Baeten, Nicole Jeanne |
author_sort |
Baeten, Nicole Jeanne |
title |
Mass-movements on the continental slope offshore Lofoten, Northern Norway |
title_short |
Mass-movements on the continental slope offshore Lofoten, Northern Norway |
title_full |
Mass-movements on the continental slope offshore Lofoten, Northern Norway |
title_fullStr |
Mass-movements on the continental slope offshore Lofoten, Northern Norway |
title_full_unstemmed |
Mass-movements on the continental slope offshore Lofoten, Northern Norway |
title_sort |
mass-movements on the continental slope offshore lofoten, northern norway |
publisher |
Universitetet i Tromsø |
publishDate |
2013 |
url |
https://hdl.handle.net/10037/5506 |
long_lat |
ENVELOPE(17.820,17.820,68.862,68.862) |
geographic |
Laberg Lofoten Norway |
geographic_facet |
Laberg Lofoten Norway |
genre |
Lofoten Northern Norway |
genre_facet |
Lofoten Northern Norway |
op_relation |
978-82-8236-105-7 https://hdl.handle.net/10037/5506 URN:NBN:no-uit_munin_5206 |
op_rights |
openAccess Copyright 2013 The Author(s) |
_version_ |
1766063965214867456 |