Browsing Department of Earth Science by Title
Now showing items 677-696 of 1215
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Mineralogical controls on the weathering characteristics of arid continental deposits of the Colorado Plateau
(Master thesis, 2015-06-01)The Permian to Jurassic stratigraphy of the Colorado Plateau includes a number of units that were deposited under arid depositional conditions. These units each show distinctive weathering characteristics which cannot ... -
Mineralogical distribution and genetic aspects of cobalt at the active Fåvne and Loki’s Castle seafloor massive sulfide deposits, Arctic Mid-Ocean Ridges
(Journal article; Peer reviewed, 2023)The demand for responsibly sourced cobalt has increased dramatically as a result of the global transition to ‘fossil-free’ electromobility. However, the distribution, mineralogical expressions and mechanisms of concentration ... -
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 ... -
Minimum 1D velocity model and local magnitude scale for Myanmar
(Journal article; Peer reviewed, 2019)Earthquake monitoring in Myanmar has improved in recent years because of an increased number of seismic stations. This provides a good quality dataset to derive a minimum 1D velocity model and local magnitude (ML) scale ... -
Miocen utvikling av Vøringbassenget, basert på 2D multikanals seismikk
(Master thesis, 2010)2D multikanals seismikk, i kombinasjon med brønndata, er i denne studien benyttet for å studere de kenozoiske sedimentene i Vøringbassenget. I tillegg til den seismiske studien er fire brønner knyttet sammen med det seismiske ... -
A Miocene (8–12 Ma) intermediate water benthic stable isotope record from the northeastern Atlantic, ODP Site 982
(Peer reviewed; Journal article, 2003-03-12)Oxygen and carbon isotope records are presented for the benthic foraminifer Cibicidoides wuellerstorfi from upper middle through lower upper Miocene (11.6–8.2 Ma) sediments recovered at intermediate water depth (1134 m) ... -
Modeling and Inversion of CSEM Data using Green's Function Methods
(Master thesis, 2014-06-01)The aim of the present study is to develop new approximations to the integral equation for 3D Controlled Source Electromagnetic (CSEM) synthetic data. Several scattering approximations to the integral equation have previously ... -
Modeling and inversion of seismic data using multiple scattering, renormalization and homotopy methods
(Doctoral thesis, 2020-05-14)Seismic scattering theory plays an important role in seismic forward modeling and is the theoretical foundation for various seismic imaging methods. Full waveform inversion is a powerful technique for obtaining a high-resolution ... -
Modeling compaction effects on the elastic properties of clay-water composites
(Peer reviewed; Journal article, 2012-09)Modeling the elastic properties of clay-bearing rocks (shales) requires thorough knowledge of the mineral constituents, their elastic properties, pore space microstructure, and orientations of clay platelets. Information ... -
Modeling the Greenland englacial stratigraphy
(Journal article; Peer reviewed, 2021)Radar reflections from the interior of the Greenland ice sheet contain a comprehensive archive of past accumulation rates, ice dynamics, and basal melting. Combining these data with dynamic ice sheet models may greatly aid ... -
Modelling and inversion of time-lapse seismic data using scattering theory
(Master thesis, 2015-06-01)Waveform inversion methods can be used to obtain high-resolution images of the elastic and acoustic property changes of petroleum reservoirs under production, but remains computationally challenging. Efficient approximations ... -
Modelling and processing of flexural wave noise in sea ice
(Master thesis, 2016-04-12)One of the most common problems with seismic data obtained on sea ice is the presence of flexural ice wave noise on the seismic raw data. Flexural wave noise occurs on seismic data acquired on ice in the so-called transition ... -
Modelling illumination and resolution effects in seismic with a 2(3)D convolution method
(Master thesis, 2018-12-14)The aim of seismic modelling is to generate modelling cases with the highest degree of realism possible, where the benchmark is the expensive (expertise needed, extensive time-cost) finite-difference modelling method. A ... -
Modelling of an OBS profile across Storfjorden, Svalbard
(Master thesis, 2017-12-16)In this thesis, seismograms from eight Ocean Bottom Seismometers (OBS) have been processed, interpreted and used to obtain a 2D velocity model of a crustal transect across Storfjorden south of Svalbard through forward/inverse ... -
Modelling of OBS Data Across the Vestbakken Volcanic Province
(Master thesis, 2011)A P-Wave model of a 384 km long Ocean Bottom Seismometer profile has been modelled by use of ray-tracing. The profile, Bear Island South (BIS-2008), crossses the transtensional Vestbakken Volcanic Province and the boundary ... -
Modelling temporal changes in the gravity field in the Nankai Trough Subduction Zone, Japan
(Master thesis, 2019-12-20)The Nankai trough subduction zone off southwest Japan is prone to large earthquakes, causing tsunamis and great damages to the nearby islands. Linking the sources of these earthquakes to asperities along the plate interface ... -
A Modelling Workflow for Seismic Characterization of Paleokarst Reservoirs
(Master thesis, 2018-12-14)Karst is a type of landscape formed by dissolution of soluble rocks such as carbonates. Caves are common subsurface karst features and develop where water percolates through the host rock and creates cave-passages through ... -
The Moho Architecture and Its Role for Isostasy—Insights From the Lofoten-Vesterålen Rifted Margin, Norway
(Journal article; Peer reviewed, 2023)The crustal structure of the Nordland and Troms region, Norway, has received growing scientific attention because (a) the region is one of the most seismically active areas of mainland Norway, and (b) there are differing ... -
Monitoring glacial lake outburst flood susceptibility using Sentinel-1 SAR data, Google Earth Engine, and persistent scatterer interferometry
(Journal article; Peer reviewed, 2022)Continuous monitoring of glacial lakes, their parent glaciers and their surroundings is crucial because possible outbursts of these lakes pose a serious hazard to downstream areas. Ongoing climate change increases the risk ... -
Morphology and life history divergence in cave and surface populations of Gammarus lacustris (L.)
(Peer reviewed; Journal article, 2018-10-25)Cave animals provide a unique opportunity to study contrasts in phenotype and life history in strikingly different environments when compared to surface populations, potentially related to natural selection. As such, we ...