Browsing Department of Earth Science by Title
Now showing items 481-500 of 1103
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Inversion of seismic AVA data for porosity and saturation
(Master thesis, 2013-06-27)Rock physics serves as the link between reservoir parameters and the effective elastic reservoir properties, and Amplitude Variation with Angle (AVA) modelling serves as the link between elastic properties and reflection ... -
Inversion of Teleseismic Polarization Data for Crustal Velocities in Norway
(Master thesis, 2017-06-23)To characterize the crustal and upper mantle structure it is possible to perform a joint inversion of receiver functions and apparent S-velocities. The inversion is performed using a linearized weighted iterative least-squares ... -
Inversion of the Linear and Parabolic Radon Transform
(Master thesis, 2010-05-31)Different mathematical techniques are applied to the linear and parabolic Radon transforms. Including a review of classical work, recent developments, and testing of two proposed methods. Studies span from sampling and ... -
Inversion of time-lapse seismic waveform data using integral equation methods
(Master thesis, 2018-06-20)Time-lapse seismic data are considered a valuable tool for monitoring hydrocarbon reservoirs. Since the changes in elastic parameters associated with production of hydrocarbons, or injection of CO2 into a reservoir, tend ... -
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 ... -
Investigating multiple sulfur isotope variations in active hydrothermal chimneys and fluids from the Arctic Mid Ocean Ridges
(Master thesis, 2022-05-09)The four different vent fields Seven Sisters, Soria Moria, Fåvne and Loki’s Castle are all located on the ultra-slow spreading AMOR. The Seven Sisters and the Soria Moria vent fields are located on the southern part of the ... -
Investigation and optimization of OBC sensor array coupling to the seafloor: Novel approach to systematic testing of receiver coupling
(Doctoral thesis, 2013-10-29)The most important challenge for the oil-industry is to increase the recovery rates for existing oil and gas fields and to map fluid movements with time-lapse 4D seismic, ensure caprock integrity and reduce geo-hazards or ... -
An investigation into the potential of a new quantitative DHI method
(Master thesis, 2018-06-22)The seismic response of a layer boundary is dependent on a variety of geological factors and is likely to vary significantly along a given reflector. An aspect that seems to be underutilised in the current DHI methods is ... -
Investigations of abrupt climate change offshore east Greenland continental margin during marine isotope stages 3 and 5
(Master thesis, 2016-06-01)Paleoclimatic records obtained from western Nordic Seas core GS15-198-38CC (70°N, 17°W) exhibit fluctuating climatic patterns of millennial time scales. Here, foraminifera isotope records used to reconstruct sea surface ... -
Is there evidence for a 4.2 kaBP event in the northern North Atlantic region?
(Peer reviewed; Journal article, 2019-09-02)We review paleoceanographic and paleoclimatic records from the northern North Atlantic to assess the nature of climatic conditions at 4.2 ka BP, which has been identified as a time of exceptional climatic anomalies in many ... -
Isavsmelting og postglaciale flaumskredvifter i Arna, Hordaland
(Master thesis, 1975) -
Isavsmeltinga i Eksingedalen og områda omkring
(Master thesis, 1974) -
Isotopic composition of Pb in tree rings of Norway spruce (Picea abies) from the Fensfjorden area, western Norway
(Master thesis, 2012-06-01)The annual growth of tree rings makes the trees as possible archive of the past atmospheric pollution. However, several aspects addressed in literature such as post-depositional mobility of Pb, intra-ring heterogeneity and ... -
Izu-Bonin rear-arc magmatism: Geochemical investigation of volcanoclastic material
(Master thesis, 2017-06-23)Studied samples from the Izu Bonin rear arc show a distinct geochemical pattern that resemble the modern continental crust. In contrast to the volcanic front, samples from the Izu Bonin rear arc show enrichment of LREE ... -
Joint-patterns, mechanical properties and weathering characteristics of selected, arid, continental deposits of the Colorado Plateau
(Master thesis, 2015-06-01)The Colorado Plateau contains a stratigraphic sequence spanning from Precambrian to Tertiary in age, including a thick succession of Permian and Mesozoic strata that are well displayed in outcrops throughout southeastern ... -
Jordartskartlegging, glasialgeologi og kvartær stratigrafi på Stad og Vågsøy, Ytre Nordfjord
(Master thesis, 1979) -
Kallskarskredet og påfølgjande tapping av Onilsavatnet – Tafjord, Møre og Romsdal
(Master thesis, 2019-03-05)Tafjord er ei lita bygd inst i Tafjorden på Sunnmøre, som ligg i eit område med høg skredaktivitet og skredfare. Tre fjellparti i nærleiken av Tafjord vert i dag overvaka dagleg grunna fare for katastrofale fjellskred, og ... -
Kan biologikunnskap bidra til økt forståelse av komplekse geologiske systemer?
(Master thesis, 2023-06-08)Jordsystemet i geologi består av fem delsystemer: geosfæren, atmosfæren, hydrosfæren, kryosfæren, og biosfæren. Til tross for dette blir sistnevnte underkommunisert gjennom geofag-undervisning på vgs-nivå. Jordsystemet ... -
Karst i Elgfjellet, Lomsdal-Visten nasjonalpark: Strukturgeologi og grottearkitektur i Gråryggen
(Master thesis, 2020-06-27)Ei grotte kan definerast som eit naturleg holrom stort nok til at eit menneske kan kome seg inn (Ford og Williams, 2007). Om ei grotte er danna i oppløyseleg kalkstein eller marmor, omtalast holrommet som ei karstgrotte. ... -
Kartlegging av område med potensiell skredfare i Os kommune, Hordaland
(Master thesis, 2011)Frå 2010 trådde plan- og bygningslova i kraft. Den seier at risiko- og sårbarheitanalyse med omsyn på mellom anna skred skal utførast i samanheng med nybygging og merkast på aktsemdkart. Dette er bakgrunnen for at Os ...