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| Titel |
Cenozoic pre-glacial tectonostratigraphy and erosion estimates for the
northwestern Barents Sea |
| VerfasserIn |
Amando Lasabuda, Jan Sverre Laberg, Stig-Morten Knutsen |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250143236
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| Publikation (Nr.) |
 EGU/EGU2017-6940.pdf |
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| Zusammenfassung |
| The northwestern Barents Sea continental margin is located between Bjørnøya
and Svalbard. It is a structurally complex area characterized by a series of highs
and basins influenced by: 1) the formation of the Spitsbergen fold-and-thrust belt
towards the north and the pull-apart basin, the Vestbakken Volcanic Province, to the
south, and 2) the rifting and opening of the Fram Strait, the deep-water gateway
connecting the Norwegian – Greenland Sea and the Arctic Ocean. This study incorporate
newly available 2D seismic data as well as magnetic data, and aim to improve the
understanding of the Cenozoic evolution of this area, including better constrain of the
timing of the main sedimentation events of the Cenozoic basins and estimates of the
volume of sediments involved and the corresponding rates of erosion of the drainage
area.
The Cenozoic development of this area is strongly related to the rifting and opening of the
Norwegian-Greenland Sea. During the Paleocene-Eocene, the northwestern Barents
Sea margin were subjected to compression/transpression when Greenland drifted
towards Svalbard that led to uplift and the development of fold-and-thrust belt on
Svalbard. Subsequently, from the Oligocene, a tectonic plate reorganization occurred,
leading to crustal extension, sea floor spreading and opening of the Fram Strait
west of Svalbard. The seismic data shows a pronounced sequence of Early – Mid
Cenozoic, pre-glacial sediments overlying the oceanic crust west of Svalbard while to
the east, the Svalbard platform and the Stappen High were subjected to erosion
and probably acted as the main sediment source for the northwestern Barents Sea
margin.
The amount of erosion will be estimated from the study of the deposited sediment
volumes and their inferred source area. We will then compare the sedimentation and erosion
rates to rates from other parts of the Norwegian – Barents Sea – Svalbard margin as well as
relevant modern systems. Furthermore, the Cenozoic paleo-geography will be reconstructed. |
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