Cenozoic tectonosedimentary development and erosion estimates for the Barents Sea continental margin, Norwegian Arctic

• Main Author: Lasabuda, Amando Putra Ersaid
• Format: Doctoral or Postdoctoral Thesis
• Language: English
• Published: UiT Norges arktiske universitet 2018
• Subjects: VDP::Mathematics and natural science: 400::Geosciences: 450; VDP::Matematikk og Naturvitenskap: 400::Geofag: 450; VDP::Mathematics and natural science: 400::Geosciences: 450::Sedimentology: 456; VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Sedimentologi: 456; VDP::Mathematics and natural science: 400::Geosciences: 450::Tectonics: 463; VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463; VDP::Mathematics and natural science: 400::Geosciences: 450::Petroleum geology and petroleum geophysics: 464; VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Petroleumsgeologi og -geofysikk: 464; VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology; glaciology: 465; VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi; glasiologi: 465; DOKTOR-004; Arctic; Arctic Ocean; Barents Sea; Laberg; Rydningen; Svalbard
• Online Access: https://hdl.handle.net/10037/12800

The papers 1, 2 and 3 are not available in Munin. Paper 1: Lasabuda, A., Laberg, J. S., Knutsen, S.-M., Høgseth, G. Early to middle Cenozoic paleoenvironment and sediment yield of the southwestern Barents Sea continental margin: Insights from a regional mass-balance approach. (Manuscript). Accepted manuscript version available in Marine and Petroleum Geology, June 2018 Paper 2: Lasabuda, A., Laberg, J. S., Knutsen, S.-M, Safronova, P. A. Cenozoic tectonostratigraphy and pre-glacial erosion: A mass-balance study of the northwestern Barents Sea margin, Norwegian Arctic. (Manuscript). Accepted manuscript version available in Journal of Geodynamics, Special Arctic Issue 2018. Paper 3: Lasabuda, A., Geissler, W. H., Laberg, J. S., Knutsen, S.-M, Rydningen, T. A., Berglar, K. Late Cenozoic glacial sediment input to the Arctic Ocean – quantifying the contribution from the Barents Sea. (Manuscript). Final version with altered title, published in Geochemistry, Geophysics, Geosystems, 19 (12), 4876-4903, is available at https://doi.org/10.1029/2018GC007882 The Barents Sea shelf has been experienced extensive uplift and erosion in the Cenozoic. However, the pre-glacial erosion has been so far less constrained in comparison to the glacial erosion. This paper aims to better understand the early–middle Cenozoic erosion in the western Barents Sea and the late Cenozoic erosion in the northern Barents Sea by using the mass-balance approach. The study utilizes seismic and well data to map the Cenozoic sediments and to estimate their volumes. The paleoenvironmental reconstruction is used to delineate the size of the likely source areas. From this, the average erosion and erosion rates are estimated. It is important to quantify the erosion as an effort to lower the risk in petroleum exploration in the Barents Sea. This study is also essential to understand the sedimentation pattern and their relation to the tectonic development. The paper suggests an N-S trending of uplift and erosion in the early–middle Cenozoic and E-W trending of uplift and erosion in the late Cenozoic. For the first time, the glacial erosion is estimated in the northeastern Svalbard/northern Barents Sea continental margin, which reflects the sediment input to the Arctic Ocean. The average erosion rates show one order of magnitude lower than the glacial erosion rates. The estimated numbers from this thesis are compared to the other high-latitude margins and in agreement with present-day systems.