Blar i Department of Earth Science på utgivelsesdato
Viser treff 81-100 av 1034
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A matrix-free variant of the distorted Born iterative method for seismic full-waveform inversion
(Journal article; Peer reviewed, 2023)The distorted Born iterative method reduces a nonlinear inverse scattering problem to a sequence of (ill-posed) linear inverse scattering problems that can be solved using a regularized least-squares formulation. This ... -
Configuration of the Scandinavian Ice Sheet in southwestern Norway during the Younger Dryas
(Journal article; Peer reviewed, 2023)The extent of the Scandinavian Ice Sheet in southwestern Norway is precisely located during the well-characterized Younger Dryas re-advance. However, the thickness of the ice sheet is less well constrained inland from the ... -
Application of in-situ gamma spectrometry for radiogenic heat production estimation in the Western Himalaya, Kohistan, and Karakoram in northern Pakistan
(Journal article; Peer reviewed, 2023)The Himalaya, Kohistan, and Karakoram ranges comprise Proterozoic to Cenozoic crystalline complexes exposed in northern Pakistan. Numerous hot springs in the area indicate high subsurface temperatures, prompting a need to ... -
An experimental study of the effect of water and chlorine on plagioclase nucleation and growth in mafic magmas: application to mafic pegmatites
(Journal article; Peer reviewed, 2023)In this study, the effects of H2O and Cl on the grain size and nucleation delay of plagioclase in basaltic magma were investigated using dynamic and equilibrium experiments at 1150 ∘C, 300 MPa, and oxygen fugacity between ... -
Constraining the 3-D Geometry of Fold-Thrust Belts Using Section Balancing vs. 3-D Interpolative Structural and Probabilistic Modeling
(Journal article, 2023)Quantitative uncertainty analysis, 2-D and 3-D modeling of the subsurface, as well as their visualization form the basis for decision making in exploration, nuclear waste storage and seismic hazard assessment. Methods such ... -
Tectono-Stratigraphic Evolution of Salt-Influenced Normal Fault Systems: An Example From The Coffee-Soil Fault, Danish North Sea
(Journal article; Peer reviewed, 2023)We explore how the relationships between fault activity, salt movement and sediment loading affect the stratal geometry of the hanging wall throughout the evolution of a salt-influenced normal fault system. We examine a ... -
Topological Characterization of a Fault Network Along the Northern North Sea Rift Margin
(Journal article; Peer reviewed, 2023)The factors that control the spatial variation of the topological characteristics of normal fault networks at the rift-scale are poorly understood. Here, we use 3D seismic reflection data from the northern North Sea to ... -
Putative novel hydrogen- and iron-oxidizing sheath-producing Zetaproteobacteria thrive at the Fåvne deep-sea hydrothermal vent field
(Journal article; Peer reviewed, 2023)Iron-oxidizing Zetaproteobacteria are well known to colonize deep-sea hydrothermal vent fields around the world where iron-rich fluids are discharged into oxic seawater. How inter-field and intra-field differences in ... -
Deglaciation of the highest mountains in Scandinavia at the Younger Dryas–Holocene transition: evidence from surface exposure-age dating of ice-marginal moraines
(Journal article; Peer reviewed, 2023)Surface exposure–age dating was applied to rock surfaces associated with ice-marginal moraines at elevations of ~1520–1780 m a.s.l. on the slopes of Galdhøpiggen and Glittertinden, the two highest mountains in Scandinavia ... -
Holocene skredavsetninger i Halsafjorden, Nordmøre
(Master thesis, 2022-12-09)Hovedformålet med denne masteroppgaven er å avdekke og datere holocene skredavsetninger i Halsafjorden i forbindelse med prosjektet «Ferjefri E39». Ferjefri-E39 prosjektet er et samarbeidsprosjekt mellom Statens Vegvesen, ... -
Seismic data analysis of an onshore-offshore transition zone at Ramså Basin, Norway – a modelling study
(Master thesis, 2022-10-03) -
Reconstructing surface mass balance from the englacial stratigraphy of the Greenland Ice Sheet
(Doctoral thesis, 2022-09-30)Interiøren av isflakene består av mange lag akkumulert snø, hvis tykkelse avhenger av overflatemassebalanse (OMB) fra fortiden og effekten av dynamisk tynning etter lagenes avsetning. Denne oppgaven undersøker påvirkningen ... -
Seismic modelling of the stratigraphic architecture of syn-rift deep-water channel complexes in the Corinth Rift, Greece
(Master thesis, 2022-08-03)Deep-water systems in rift basins lack extensive research because they tend to be buried in the subsurface making them hard to study directly. Rare, exhumed deep-water syn-rift depositional systems can therefore provide ... -
Geochemical characterization of the Gnitahei seafloor massive sulfide deposit, Arctic Mid-Ocean Ridge
(Master thesis, 2022-06-29)The Gnitahei SMS deposit (72.75°N 3.81°E) is a newly discovered seafloor massive sulfide deposit located on the slow to ultraslow spreading Mohns Ridge in the Arctic Mid-Ocean Ridge system. The deposit was discovered by ... -
Surface mass balance modeling of the Greenland ice sheet : Sensitivity and uncertainty of the energy balance model BESSI
(Doctoral thesis, 2022-06-17)The surface mass balance is the main connection between the atmospheric climate change and the evolution of Greenland ice sheet over the next century. This thesis focuses on the development of surface mass and energy balance ... -
Mapping of the Subglacial Topography of Folgefonna Ice Cap in Western Norway—Consequences for Ice Retreat Patterns and Hydrological Changes
(Journal article; Peer reviewed, 2022-06-13)Folgefonna consists of three ice caps which are rapidly retreating in response to warmer temperatures. The melting of Folgefonna has implications for meltwater drainage and hydropower production, as well as the potential ... -
Interpretation of alluvial deposits in deep directional resistivity data: the Triassic Skagerrak Formation, Ivar Aasen, Utsira High
(Master thesis, 2022-06-01)A significant amount of hydrocarbons are contained within fluvial deposits, which constitute potential CO2 storage sites. The Skagerrak 2 reservoir zone of the Triassic Skagerrak Formation in the Ivar Aasen field (North ... -
Skredkartlegging og 10Be-eksponeringsdatering av fjellskred i Bondhusdalen, Kvinnherad kommune
(Master thesis, 2022-06-01)I Norge er skred den naturfaren som tar flest menneskeliv. Skred er en landskapsendrende prosess, med hurtige massebevegelser av bergartsfragmenter, løsmasser, vann og snø. Ulike skredprosesser avsetter landformer og ... -
Elastic Imaging and Full Waveform Inversion for Carbon Sequestration
(Master thesis, 2022-06-01)Geological sequestration of carbon dioxide (CO2) is essential to reduce the effects of global warming. However, this requires careful monitoring. Reflection seismics collects data from a large area and is therefore the ...