Department of Earth Science
Recent Submissions
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Distribution of thermochemical output and associated ecosystems at the Loki’s Castle hydrothermal field
(Master thesis, 2021-01-05)Loki’s Castle is a hydrothermal vent field situated on the ultra-slow Arctic mid-Ocean ridges, at the boundary of the Mohns- and Knipovich segments (73◦30’N, 08◦E), and consists of two sulfide mounds and associated black ... -
Seismic Acquisition in a Shallow Marine Sea Ice Covered Environment: The Significance of Survey Geometry and Possible Impacts on Pinnipeds
(Master thesis, 2017-06-27)Seismic surveying of Arctic environments is important for both economic and environmental reasons. The world energy demand is increasing, and new areas need to be explored to cover the demand. One of the new areas where ... -
Imaging Discontinuities in the Lithospheric Mantle Using a New, Automated Ps and Sp Receiver Function Workflow
(Master thesis, 2020-12-10)Over the last decades, the receiver function technique has been widely established as a standard tool for surveying sharp changes in elastic properties of the Earth’s crust and upper mantle. To date, very few studies have ... -
Crustal structure and seismicity of Cuba and Web-based applications for earthquake analysis
(Doctoral thesis, 2002)This thesis comprises six papers divided into two parts. Part I consist of four papers in which a study of the crust and seismicity of Cuba is presented. The main achievements in this part are: (1) A new Pwave velocity ... -
Seismic acquisition and analysis in a changing Arctic
(Doctoral thesis, 2020-12-03)In the Arctic, temperatures are regularly low enough that water exists in its frozen state, either in the form of ice, snow, or frozen ground. The effective elastic properties of a material depend on the elastic properties ... -
Computationally Efficient Methods for Seismic Modeling and Inversion
(Doctoral thesis, 2020-11-18)This thesis presents new methods for the modeling of seismic waveforms based on ray theory and ray-Born integrals. The waveforms are used in forward modeling, imaging and full waveform inversion and are computed in 3D ... -
Adjoint Modeling and Observing System Design in the Subpolar North Atlantic
(Doctoral thesis, 2019-08-30)The near-surface ocean currents of the subpolar North Atlantic transport large amounts of heat from the subtropics to higher latitudes, affecting Arctic sea ice extent, the melting of the Greenland Ice Sheet, and the climate ... -
Asynchronous Antarctic and Greenland ice-volume contributions to the last interglacial sea-level highstand
(Peer reviewed; Journal article, 2019-11-06)The last interglacial (LIG; ~130 to ~118 thousand years ago, ka) was the last time global sea level rose well above the present level. Greenland Ice Sheet (GrIS) contributions were insufficient to explain the highstand, ... -
Clitellate worms (Annelida) in late-glacial and Holocene sedimentary DNA records from the Polar Urals and northern Norway
(Peer reviewed; Journal article, 2018-11-26)While there are extensive macro‐ and microfossil records of a range of plants and animals from the Quaternary, earthworms and their close relatives amongst annelids are not preserved as fossils and therefore the knowledge ... -
Investigating Fine‐Scale Permeability Structure and Its Control on Hydrothermal Activity Along a Fast‐Spreading Ridge (the East Pacific Rise, 9°43′–53′N) Using Seismic Velocity, Poroelastic Response, and Numerical Modeling
(Peer reviewed; Journal article, 2019)Along with the intracrustal heat source, crustal permeability is considered as the controlling factor for hydrothermal circulation within zero‐age oceanic crust. To obtain fine‐scale, 2‐D models of upper crustal permeability ... -
Fana har Norges første og beste naturarkiv fra varmetiden før siste istid
(Fana Historielag Årsskrift 2009, Chapter, 2009) -
Linking regional unconformities in the Barents Sea to compression-induced forebulge uplift at the Triassic-Jurassic transition
(Peer reviewed; Journal article, 2019)The Triassic-Jurassic transition marks an important change in the basin configuration of the Greater Barents Sea. A contiguous basin with km-thick sedimentary successions changed into a partitioned basin with uplift in the ... -
Pre-existing intra-basement shear zones on the development of non-colinear rift fault network, Utsira High – Heimdal Terrace, North Sea
(Peer reviewed; Journal article, 2020)Pre-existing intra-basement shear zones can induce mechanical and rheological heterogeneities that may influence rifting and the overall geometry of rift-related normal faults. However, the extent to which physical and ... -
Minibasin depocentre migration during diachronous salt welding, offshore Angola
(Peer reviewed; Journal article, 2019)Salt tectonics is an important part of the geological evolution of many continental margins, yet the four‐dimensional evolution of the minibasins, the fundamental building block of these and many other salt basins, remains ... -
High-resolution record revealsclimate-driven environmental andsedimentary changes in an active rift
(Peer reviewed; Journal article, 2019-02-28)Young rifts are shaped by combined tectonic and surface processes and climate, yet few records exist to evaluate the interplay of these processes over an extended period of early rift-basin development. Here, we present ... -
Progressive tilting of salt-bearing continental margins controls thin-skinned deformation
(Peer reviewed; Journal article, 2019)As a primary driving force, margin tilting is crucial for gravity-driven thin-skinned salt tectonics. We investigated how instant versus progressive margin tilting mechanisms influence salt tectonics using an analogue ... -
Fault core thickness: Insights from siliciclastic and carbonate rocks
(Peer reviewed; Journal article, 2019-06-02)Fault core accommodates intense deformation in the form of slip surfaces and fault rocks such as fault gouge, cataclasite, breccia, lenses, shale smear, and diagenetic features. The complexity and variation in fault core ... -
Reducing Uncertainties in Carbonate Clumped Isotope Analysis Through Consistent Carbonate-Based Standardization
(Peer reviewed; Journal article, 2018)About a decade after its introduction, the field of carbonate clumped isotope thermometry is rapidly expanding because of the large number of possible applications and its potential to solve long‐standing questions in Earth ... -
Rekonstruksjon av storflommer i Tovdalsvassdraget gjennom holocen, ved terskelinnsjøen Berse
(Master thesis, 2020-07-04)Tovdalsvassdraget på Sørlandet domineres i dag av høstflommer som følge av store nedbørshendelser, men enkelte vårflommer forekommer. I denne studien er flomarkivet for Tovdalsvassdraget utvidet utover de instrumentelle ... -
Etablering av holocen askestratigrafi i innsjøarkiver for Vest-Norge
(Master thesis, 2020-07-04)Askestratigrafi er et mye brukt verktøy til kronostratigrafisk korrelering og datering. For vest-norske innsjøer er det tefrakronologiske rammeverket svært begrenset, og en etablering av en askestratigrafi derfra kan gi ...
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