Show simple item record

dc.contributor.advisorRydningen, Tom Arne
dc.contributor.advisorLaberg, Jan Sverre
dc.contributor.authorLundegaard, Marius
dc.date.accessioned2020-08-17T11:03:35Z
dc.date.available2020-08-17T11:03:35Z
dc.date.issued2020-06-15
dc.description.abstractThe late Cenozoic evolution of the outer continental shelf and slope on the northern part of the mid-Norwegian margin is studied using 3D seismic data. The late Cenozoic stratigraphy is subdivided into four main seismic units: unit A (oldest) to D and correlated to the established stratigraphic framework of the Naust Formation, where the oldest unit in this study correlates to the upper part of Naust unit A. The internal seismic signature of the units and the geomorphology of the unit boundaries form the basis for reconstructing the margin evolution. Palaeo-troughs and mega-scale glacial lineations (MSGLs) observed on buried shelf horizons suggest that fast-flowing ice streams drained from the Scandinavian mainland, traversed the shelf within Trænadjupet and Sklinnadjupet troughs, and reached the shelf break. Consequently, the palaeo-slope prograded westwards as downslope processes build out the margin. Based on seismic facies and geophysical attributes, the slope sediments were predominantly deposited by debris flows, but turbidity currents have also occurred. Large amount of glacial till was subglacially transported and deposited on the outer shelf and upper slope, before the sediments became unstable and redistributed downslope by gravity driven processes. The sediment distribution of the area suggests that both Trænadjupet and Sklinnadjupet troughs have been active during the glaciations; however, Sklinnadjupet Trough has been the main source of sediment during deposition of Naust A, U, S and T. Iceberg plough marks on all the buried surfaces testify to free-floating icebergs of sizes capable of eroding the outer shelf and upper slope. The Norwegian Atlantic Current was active during the margin buildout, as suggested by along slope drifting iceberg directions and the presence of the Nyk Drift on the slope.en_US
dc.identifier.urihttps://hdl.handle.net/10037/18974
dc.language.isoengen_US
dc.publisherUiT Norges arktiske universiteten_US
dc.publisherUiT The Arctic University of Norwayen_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0en_US
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)en_US
dc.subject.courseIDGEO-3900
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleLate Cenozoic development of the mid-Norwegian continental margin – a study of the Naust Formation based on 3D-seismic dataen_US
dc.typeMaster thesisen_US
dc.typeMastergradsoppgaveen_US


File(s) in this item

Thumbnail
Thumbnail

This item appears in the following collection(s)

Show simple item record

Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)