Browsing Institutt for geofag by Title
Now showing items 525-544 of 3035
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(Chapter / Bokkapittel / PublishedVersion; Peer reviewed, 2019)Seismic exploration in complex geological settings and shallow geological targets has led to a demand for higher spatial and temporal resolution in the final migrated image. Seismic data from conventional marine acquisition ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)Seismic exploration in complex geologic settings and shallow geologic targets has led to a demand for higher spatial and temporal resolution in the final migrated image. Conventional marine seismic and wide-azimuth data ...
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(Master thesis / Masteroppgave, 2017)
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)We use ambient seismic noise and earthquake recordings on a temporary regional network in southern Norway to produce Rayleigh and Love wave phase velocity maps from 3 to 67 s period. Local dispersion curves are then jointly ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)We present a new 2D crustal-scale model of the northwestern Iranian plateau based on gravity–magnetic modeling along the 500 km long China–Iran Geological and Geophysical Survey in the Iranian plateau (CIGSIP) seismic ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)SUMMARY The crustal architecture of the Barents Sea is still enigmatic due to complex evolution during the Timanian and Caledonian orogeny events, further complicated by several rifting episodes. In this study ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)The Loppa High area has been subject to several events of uplift and subsidence from the Late Paleozoic to Present. The driving mechanisms behind the vertical movements, however, are not fully understood. We propose that ...
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Crustal structure and evolution of the Arctic Caledonides: Results fromcontrolled-source seismology (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)The continuation of the Caledonides into the Barents Sea has long been a subject of discussion, and two major orientations of the Caledonian deformation fronts have been suggested: NNW-SSE striking and NE-SW striking. A ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)The Eggvin Bank, located between the Jan Mayen Island and Greenland, is an unusually shallow area containing several submarine volcanic peaks, confined by two transforms on the Northern Kolbeinsey Ridge (NKR). We represent ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)The crustal structure in the interior of Greenland is largely unknown because of its remote location below the up to 3.4‐km‐thick ice sheet. We present a model of the crustal velocity structure in central‐eastern Greenland ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)We present a crustal-scale seismic profile in the Barents Sea based on new data. Wide-angle seismic data were recorded along a 600 km long profile at 38 ocean bottom seismometer and 52 onshore station locations. The modelling ...
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(Master thesis / Masteroppgave, 2014)The Eggvin Bank is a shallow area located on the northern segment of Kolbeinsey Ridge. Its crustal structure was investigated along a 301 km long transect from the Greenland Basin to the Iceland Plateau, crossing over the ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)We present a seismic and density model for the crust and the uppermost mantle of the Arctic Ocean off-shore Chukotka down to a 40 km depth along a 740-km long latitudinal (at ca. 77°N) “Arctic-2012” wide-angle/MCS profile. ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Detailed geologic mapping (639 field stations in ~700 km2) and a ~50 km-long gravity survey (142 stations) in the western Azuero Peninsula revealed two faulted and folded slivers of oceanic crust attached to the trailing ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Satellite radar altimetry is widely used to measure glacier and ice sheet elevation changes, but can suffer from uncertainties related to geolocation and signal penetration. The unique capabilities of ESA's CryoSat-2 allow ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)Radioactive caesium pollution resulting from Fukushima Dai-ichi and Chernobyl nuclear plant accidents involves strong interactions between Cs+ and clays, especially vermiculite-type minerals. In acidic soil environments, ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Surface currents and turbulent mixing were observed during a near-inertial wave (NIW) using an accousting doppler current profiler (ADCP) and satellite-tracked drifters. Drifter trajectories sampled at three depth levels ...
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(Doctoral thesis / Doktoravhandling, 2013)Bølgemekanismer i havet slik som ”Stokes drift” bidrar til å systematisk forflytte store mengder vannpartikler i en bestemt retning over store avstander. Stokes drift har blitt studert grundig for overflatebølger for ...
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(Master thesis / Masteroppgave, 2016)This thesis is an investigation of currents in the outer Oslofjord using available tools. Current records and output from the NorKyst-800 model are examined and compared using statistical methods. Internal tidal waves are ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)Continental collisions commonly involve highly curved passive plate margins, leading to diachronous continental subduction during trench rollback. Such systems may feature back-arc extension and ophiolite obduction postdating ...