My research covers different aspects of marine geology and geophysics. I have for several years been involved in geophysical investigations of natural gas hydrates in arctic areas, focusing on identification, quantification and characterization of hydrates and associated free gas accumulations. My current research projects relates mainly to Cenozoic development of the Barents Sea area. I have used a wide range of methods in my research and have expertise in geophysical processing, modelling, interpretation of mainly P-wave but also S-wave seismic data. The last few years I have focused my research efforts on glacial geomorphology, sediments and processes. This includes research on identifying ice streams of the former Barents Sea - northern Fennoscandian Ice Sheets and reconstructing their behaviour through the Pleistocene. The use of three-dimensional (3D) seismic has been important in this work, and I have, together with a colleague, been responsible for establishing a geophysical laboratory in interpretation and visualization of 3D seismic data at UiT.
Andreassen, K., Ødegaard, C. and Rafaelsen, B. 2007. Imprints of former ice streams, imaged and interpreted using industry 3D seismic data from the south-western Barents Sea. In: Davis R, Posamentier HW, Wood LJ, Cartwright JA (eds) Seismic Geomorphology: Application to Hydrocarbon Exploration and Production. Geol. Soc. Spec. Publ. Lond. 277, 151-169.
Andreassen, K., Glad Nilsen, E. and Ødegard, C. 2007. Analysis of shallow gas and fluid migration within the Plio-Pleistocene sedimentary sucession of the SW Barents Sea using 3D-seismic data. Geomarine Letters, 27, 155-171.
Andreassen, K., Laberg, J.S. and Vorren, T.O. 2008. Seismic seafloor geomorphology of the SW Barents Sea and its glaci-dynamic implications. Geomorphology 97, 157-177.
Andreassen, K. and Winsborrow. 2009. Signature of ice streaming in Bjørnøyrenna, Polar North Atlantic, through the Pleistocene and implications for ice-stream dynamics. Annals of Glaciology 50(52), 17-26.
Bünz, S., Mienert, J., Vanneste, M, and Andreassen, K. 2005. Gas hydrates at the Storegga Slide: Constraints from an analysis of multi-component wide-angle seismic data. Geophysics, 70(5):B19-B34.
Bünz, S., Mienert, J., Andreassen, K. and Bertheussen, K.A. 2005. Marine multi-component seismology in gas hydrate investigations on the Norwegian Margin. Fire in the Ice Newsletter 2005 (Spring): 1-4
Bünz, S., Mienert, J. and Andreassen, K. 2008. Multi-component seismic studies of the gas hydrate system at the Storegga Slide. AAPG Memoir 2008
Chand, S., Mienert, J., Andreassen, K., Knies, J., Plassen, L., Fotland, B. 2007. Gas hydrate stability zone modelling in areas of salt tectonics and pockmarks of the Barents Sea suggests an active hydrocarbon venting system. Marine and Petroleum Geology 2007
Colpaert, A., Pickard, N., Mienert, J., Henriksen, L.B., Rafaelsen, B. and Andreassen, K. 2007. 3D seismic analysis of an Upper Palaeozoic carbonate succession of the Eastern Finnmark Platform area, Norwegian Barents Sea. Sedimentary Geology 2007;197:79-98
Eilertsen, R., Corner, G.D., Aasheim, O., Andreassen, K. , Kristoffersen, Y. 2006. Valley-fill stratigraphy and evolution of the Målselv fjord valley, northern Norway. In: Dalrymple, R., Leckie, D.A., Tillman, R.W. (Eds.) Incised valleys in time and space. Society for Sedimentary Geology Special Publication 85, 179-198.
Knies, J., Matthiesson, J., Vogt, C., Laberg, J.S., Hjelstuen, B.O., Smelror, M., Larsen, E., Andreassen, K., Eidvin, T. and Vorren, T.O. 2009. The Pliocene glaciation of the Barents Sea-Svalbard region: a new model based on revised chronostragigraphy. Quaternary Science Reviews 28, 812-829.
Laberg, J.S. and Andreassen, K. 2007. Submarine paleo-failure morphology on a glaciated continental margin from 3D seismic data. In Submarine mass movements and their consequences. 3rd International Symposium. Dorderecht, the Netherlands: Springer Verlag 2007. ISBN 978-1-4020-6511-8,11-18.
Laberg, J.S., Andreassen, K., Knies, J., Vorren. T.O., Winsborrow, M. 2010. Late Plio-Plristocene development of the Barents Sea Ice Sheet. Geology, 38, 107-110.
Mienert, J., Vanneste, M., Bünz, S., Andreassen, K., Haflidason, H. & Sejrup, H.P. 2005. Ocean warming and gas hydrate stability on the mid-Norwegian margin at the Storegga slide, Marine Petroleum Geology, 22 (1-2), 233-244.
Rafaelsen, B., Andreassen, K., Hogstad, K. and Kuilman, L. 2007. Large-scale glaciotectonic-imbricated thrust sheets on three-dimensional seismic data: facts or artefacts? Basin Research 2007;19(1):87-103
Rafaelsen, B.,Elvebakk, G., Andreassen, K., Stemmerik, L., Colpaert, A., & Samuelsberg, TJ. 2008. From detached to attached carbonate buildup complexes - 3D seismic data from the Upper Palaeozoic, Finnmark Platform, southwestern Barents Sea. Sedimentary Geology, 206, 17-32.
Winsborrow, M.C.M., Andreassen, K., Corner, G.D., Laberg, J.S. in press 2010. Deglaciation of a marine-based ice sheet: Late Weichselian Palaeo-ice dynamics and retreat in the southern Barents Sea reconstructed from onshore and offshore glacial geomorphology. Quaternary Science Reviews.