Blar i Department of Earth Science på tittel
Viser treff 1006-1025 av 1050
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Traveltime approximation for strongly anisotropic media using the homotopy analysis method
(Peer reviewed; Journal article, 2019)Traveltime approximation plays an important role in seismic data processing, for example, anisotropic parameter estimation and seismic imaging. By exploiting seismic traveltimes, it is possible to improve the accuracy of ... -
Tredimensjonal gravimetrisk modellering på Vøring marginen
(Master thesis, 2008-06-02)En tredimensjonal litosfæremodell ble konstruert for Vøring marginen, utenfor kysten av Midt-Norge. Grunnlaget for modellen var 32 tolkede OBS-profiler. 11 regionale grenseflater ble digitalisert fra hvert av de 32 ... -
Trigger mechanisms for sand intrusions. Inferences from published data and investigation of 3D seismic data from the northern North Sea
(Master thesis, 2018-04-17)Numerous publications have addressed subsurface sediment remobilization, in terms of geometries of the intrusions, where the intrusions occur, the parent unit of the intrusions and trigger mechanisms. Several authors have ... -
Tsunami risk communication and management: Contemporary gaps and challenges
(Journal article; Peer reviewed, 2022)Very large tsunamis are associated with low probabilities of occurrence. In many parts of the world, these events have usually occurred in a distant time in the past. As a result, there is low risk perception and a lack ... -
Turbidites in the Eocene of Spitsbergen: can they tell us something about the Sørvestsnaget Basin?
(Conference lecture, 2017) -
Turbidites, topography and tectonics: Evolution of submarine channel-lobe systems in the salt-influenced Kwanza Basin, offshore Angola
(Journal article; Peer reviewed, 2021)Understanding the evolution of submarine channel‐lobe systems on salt‐influenced slopes is challenging as these systems react to subtle, syn‐depositional changes in sea‐floor topography. The impact of large blocking ... -
U-Pb zircon provenance of metamorphosed clastic sediments in a developing rift (Dom Feliciano Belt, Uruguay and Kaoko Belt, Namibia)
(Master thesis, 2014-11-17)Geochronological studies of the westernmost part of the Kaoko Belt in Namibia, the Coastal Terrane, revealed zircons with distinct Neoproterozoic ages, that are no known from other parts of this orogen and an exotic origin ... -
Ultramafic rock carbonation: Constraints from listvenite core BT1B, Oman Drilling Project
(Journal article; Peer reviewed, 2020)The occurrence of the quartz-carbonate alteration assemblage (listvenite) in ophiolites indicates that ultramafic rock represents an effective sink for dissolved CO2. However, the majority of earlier studies of ultramafic ... -
UncertainData.jl: a Julia package for working with measurements and datasets with uncertainties
(Journal article; Peer reviewed, 2019-11-01)UncertainData.jl provides an interface to represent data with associated uncertainties for the Julia programming language (Bezanson, Edelman, Karpinski, & Shah, 2017). Unlike Measurements.jl (Giordano, 2016), which deals ... -
Undersøkelser av alder, volum og utbredelse av Gloppedalsura, Bjerkreim og Gjesdal kommuner, i Rogaland
(Master thesis, 2018-06-30)This master thesis examines the age, volume and extent of Gloppedalsura in Bjerkreim and Gjesdal communities in Rogaland county. The Schmidt Hammer is used for estimating age. This method is widely used as a relative dating ... -
Unraveling distinctive sulphide mineralization and hydrothermal alteration on shallow seafloor hydrothermal systems
(Master thesis, 2017-04-22)Since the discovery of seafloor hydrothermal systems in the late 1970´s, they have been found in different types of geological settings. Recent discoveries of active, inactive and inferred vent fields on the Arctic Mid ... -
Unraveling the mechanisms and implications of a stronger mid-Pliocene Atlantic Meridional Overturning Circulation (AMOC) in PlioMIP2
(Journal article; Peer reviewed, 2023)The mid-Pliocene warm period (3.264–3.025 Ma) is the most recent geological period in which the atmospheric CO2 concentration was approximately equal to the concentration we measure today (ca. 400 ppm). Sea surface temperature ... -
An updated Weichselian chronostratigraphic framework of the Kongsfjorden Trough Mouth Fan and its implications for the glacial history of Svalbard
(Journal article; Peer reviewed, 2022)The Arctic is a climate-sensitive area, responding rapidly to present changes, but for the past changes, the record is still incomplete. For instance, the Weichselian glacial history of the Svalbard–Barents Sea Ice Sheet ... -
Updating of geological surfaces during drilling by map migration
(Master thesis, 2023-01-23)The accuracy of the geological surfaces in an earth model is dependent on the estimation of the velocities from surface seismic data. The dataset recorded from reverse VSP of the drill bit continuous signal can be utilized ... -
Upper cretaceous-paleogene stratigraphy and development of the Mímir High, Vøring transform margin, Norwegian Sea
(Journal article; Peer reviewed, 2020)Transform margins represent strike-slip type of plate boundaries that form during continental breakup and initial ocean opening. They are often characterized by margin-parallel highs with exposed pre- and syn-rift sequences. ... -
Urban basin deposit. The pollution history of Lille Lungegårdsvannet, Bergen
(Doctoral thesis, 2014-12-09)The sediments within urban lakes will, if left undisturbed, reflect a part of the history of the city through the record of chemical compounds. The sediment chemistry in Lille Lungegårdsvannet in Bergen city is ... -
Use of inverse rock physics modeling in reservoir characterization
(Master thesis, 2012-05-31)Reservoir characterization based on seismic data demands a robust and reliable method that transforms seismically derived parameters such as elastic moduli, P-velocity, S-velocity or acoustic impedance into parameters ... -
Using climate to relate water-discharge and area in modern and ancient catchments
(Peer reviewed; Journal article, 2018-06)Models relating sediment supply to catchment properties are important in order to use the geological record to deduce landscape evolution and interplay between tectonics and climate. Water-discharge (Qw) is an important ... -
Using grain size analysis to understand transverse versus axial sediment supply to a rift: Example from the Sperchios rift, Greece
(Master thesis, 2016-06-01)In order to better understand the interaction between different controlling variables in fluvial systems in a rift basin, and the differences between transverse and axial drainage in the same setting, I present the results ... -
Using microcomputed tomography (μCT) to count varves in lake sediment sequences: Application to Lake Sagtjernet, Eastern Norway
(Journal article; Peer reviewed, 2023)Varved lake sediments are one of the most important natural archives that allow annual resolution paleoclimate reconstructions. Conventional varve counting techniques use thin sections to manually identify lamina. However, ...