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dc.contributor.authorLasabuda, Amando Putra Ersaid
dc.contributor.authorLaberg, Jan Sverre
dc.contributor.authorKnutsen, Stig-Morten
dc.contributor.authorSafronova, Polina
dc.date.accessioned2018-08-06T05:10:31Z
dc.date.available2018-08-06T05:10:31Z
dc.date.issued2018-03-26
dc.description.abstract<p>The evolution of the northwestern Barents Sea continental margin, part of a NW-SE trending mega shear zone, has been reconstructed in order to quantify the sedimentation and erosion affecting this area during and after its formation in the Paleogene–Neogene. This development was closely related to the sea-floor opening of the Norwegian-Greenland Sea. Our study incorporated 2D seismic data, well data, and information from shallow cores.</p> <p>During the Paleocene–Eocene, the northwesternmost Barents Sea margin was subjected to compression-transpression that led to the development of the West Spitsbergen Fold-Thrust Belt (WSFTB) and largely affected the northern part of the study area. To the south, the Vestbakken volcanic province developed in a pull-apart setting. A transition zone separates these two areas marked by a basin morphology becoming more pronounced to the south suggesting increasing subsidence and extension. Subsequently, during the Oligocene, extension and sea-floor spreading were initiated along the whole margin, resulting in the opening of the Fram Strait between Spitsbergen and NE Greenland in the Miocene.</p> <p>During the Paleocene, the Stappen High and a part of the NE Greenland shelf sourced sediments into the newly developing basins. The southwestern part of the WSFTB, the Stappen High, and part of the NE Greenland margin are interpreted as the main sediment source areas in the Eocene. During the Oligocene and Neogene, a larger part of the northwestern Barents Sea shelf is interpreted to have acted as source area including the Edgeøya platform. As a result of this development, the wider Barents Sea shelf itself is inferred to have been a lowland prior to the northern hemisphere glaciations.</p> <p>We found that the average sedimentation rate for the Paleogene–Neogene at the northwestern Barents Sea margin is about 0.034 m/k.y. This number is in agreement with the sedimentation rate reported from present-day fluvial systems and modern rates coastal erosion. By using a mass-balance approach, we have also estimated the average net erosion and erosion rate for the Paleogene–Neogene period to be ∼2440 m and 0.038 m/k.y, respectively. This erosion rate is two times higher compared to the southwestern Barents Sea margin, probably reflecting erosion of a more tectonically active northwestern margin. Thus, for the western Barents Sea margin, a general increasing trend of pre-glacial erosion northwards can be inferred. This study also suggests that more than half of the Cenozoic erosion affecting the studied part of the northwestern Barents Sea were of pre-glacial origin.en_US
dc.descriptionAccepted manuscript version. Published version available at <a href=https://doi.org/10.1016/j.jog.2018.03.004> https://doi.org/10.1016/j.jog.2018.03.004</a>. Accepted manuscript version, licensed <a href=http://creativecommons.org/licenses/by-nc-nd/4.0/> CC BY-NC-ND 4.0.</a>en_US
dc.identifier.citationLasabuda, A.P.E., Laberg, J.S., Knutsen, S.-M. & Safronova, P. (2018). Cenozoic tectonostratigraphy and pre-glacial erosion: A mass-balance study of the northwestern Barents Sea margin. Journal of Geodynamics. https://doi.org/10.1016/j.jog.2018.03.004en_US
dc.identifier.cristinIDFRIDAID 1578818
dc.identifier.doihttps://doi.org/10.1016/j.jog.2018.03.004
dc.identifier.issn0264-3707
dc.identifier.issn1879-1670
dc.identifier.urihttps://hdl.handle.net/10037/13352
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalJournal of Geodynamics
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectNorthwestern Barents Seaen_US
dc.subjectCenozoicen_US
dc.subjectTectonicen_US
dc.subjectMass-balanceen_US
dc.subjectErosionen_US
dc.subjectSedimentationen_US
dc.titleCenozoic tectonostratigraphy and pre-glacial erosion: A mass-balance study of the northwestern Barents Sea marginen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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