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norskBlar i tittel Mastergradsoppgaver i geologi
Viser treff 35-54 av 271
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Dannelse og utvikling av submarine kanjoner på kontinentalskråningen utenfor Lofoten
(Master thesis; Mastergradsoppgave, 2015-05-15)Tre kanjoner på kontinentalskråningen utenfor Lofoten er studert ut fra multistråle batymetridata, høyoppløselig seismiske data og foto av havbunnssedimenter. Formålet med denne studien er å diskutere dannelse, utviklingen av og den yngste aktiviteten i de tre kanjonene. To hovedhypoteser vedrørende kanjoners dannelse råder i dag; dannelse fra bunn av kontinentalskråningen og oppover eller fra ... -
Deglasiasjon og postglasial dalinnfyllingshistorie i Målselvdalen : en syntese basert på egne undersøkelser i øvre Målselvdalen og tidligere arbeid i midtre og nedre Målselvdalen
(Master thesis; Mastergradsoppgave, 2013-08-14)Dalinnfylling i Målselvdalen Øst er kartlagt og beskrevet på bakgrunn av feltarbeid, kvartærgeologisk kartlegging og littaraturstudier. Det er også basert på tidligere (av andre) undersøkelser i Målselvdalen. Målet har vært å beskrive deglasial og postglasial innfylling av Målselvdalen Øst. -
Deposits and processes on the tide-influenced fjord-head delta in Dicksonfjorden, Svalbard
(Master thesis; Mastergradsoppgave, 2018-05-15)This study investigates for the first time the tide-influenced fjord-head delta in Dicksonfjorden, a fjord in central Spitsbergen, Svalbard. In order to examine the deposits and processes, sediment cores, surface observations and bulk samples have been obtained. Sedimentary facies, log transects and composite logs are presented. Sediment cores are dated with the 210Pb dating method to provide an ... -
Development of the Late Paleozoic, Mesozoic and Cenozoic sedimentary succession in SW Barents Sea and their role in fluid leakage process
(Master thesis; Mastergradsoppgave, 2012-06-15)2D seismic and well data have been used to understand the geological evolution of the SW Barents Sea by interpreting different seismic units and to evaluate their role in distribution of fluid migration system. Eight seismic unit including seafloor are identified in the study area based on well tie with seismic data. Torsk and Kolmule formation show western progradational pattern suggesting deposition ... -
Distribution, deposition and impact of tailing disposal on the seafloor in Ranfjorden, northern Norway
(Master thesis; Mastergradsoppgave, 2018-07-29)This study is conducted in Ranfjorden in northern Norway with the goal of gaining a better understanding of the interaction between natural and anthropologic sediments within the fjord. Ranfjorden is of interest due to the fact that it has experienced extensive anthropologic impacts over the last 100 years with the submarine tailings placement (STP) of mine tailings ongoing. The analysis of this ... -
Drill cutting release in Ingøydjupet, SW Barents Sea from a well drilled in 1987, and its impact on benthic foraminifera
(Master thesis; Mastergradsoppgave, 2017-05-15)In the nearby areas of the SW Barents Sea, large hydrocarbon reserves have been identified. During drilling procedures, drill cuttings are produced and some are released to sea. The disposal of drill cuttings may cause environmental degradation to the marine environment. Increasing petroleum activities, therefore requires further knowledge of ocean current transportation of fine sediment particles ... -
Dynamically controlled hydrocarbon column heights in fault bounded traps of the Hammerfest Basin, SW Barents Sea. Fault valve theory applied to the Snøhvit field
(Master thesis; Mastergradsoppgave, 2019-11-18)During initial exploration efforts in the Barents Sea several gas prone and underfilled prospects were drilled which significantly dropped the interest in the area. The Hammerfest Basin however turned out to hold significant hydrocarbon volumes. Although still mostly underfilled, the discoveries here today make up the Snøhvit oil and gas field. The Hammerfest Basin is an overfilled petroleum basin, ... -
The effect of lithology and microstructure on the deformation of unstable rock slopes in northern Norway
(Mastergradsoppgave; Master thesis, 2022-05-14)Rock avalanches are a type of natural catastrophe in Norway with very high consequences, and the alpine landscape makes Troms and Finnmark County the region with the highest frequency of unstable rock slopes. The bedrock geology is highly relevant to assess and understand the failure mechanisms, and mechanical properties that influence deformation in rock slopes. Pre-existing structures and lithological ... -
Elementmobilitet under metasomatiske prosesser i dioritt på Vannøya
(Master thesis; Mastergradsoppgave, 2012-06)SAMMENDRAG Vannøya ligger lengst nord i Vest- Troms gneisregionen, en provins bestående av neoarkeiske til mesoproterozoiske bergarter av varierende sammensetning. Området var utsatt for en langvarig fase med rifting som skjedde som følge av oppsprekkingen av det Arkeiske kontinentet. Hovedfasen av riftingen fant sted for 2.5-2.4 Ga siden. Den mafiske intrusjonen på Vannøya har vært utsatt for en ... -
En eksperimentell tilnærmelse til innhold av klor i amfibolstrukturen ved forskjellig trykk, temperatur og pH
(Master thesis; Mastergradsoppgave, 2007-05)Det er fremsatt flere teorier når det gjelder hvordan klorholdig amfibol dannes, men inntil nå har det ikke lykkes å få indikert disse ved hjelp av eksperimenter. I denne oppgaven er hypotesen til Kullerud (1996) om underskudd av fluid som årsak til dannelse av klorholdig amfibol sjekket, ved å tilsette forskjellige fluid (NaCl + H2O) og (HCl i 37 % løsning), samt underskudd (1 wt%) og overskudd (4 ... -
Engineering geology of the Jettan rockslide, Kåfjorden
(Master thesis; Mastergradsoppgave, 2020-05-15)The unstable rock slope (URS) Jettan is located at Nordnesfjellet in Kåfjorden municipality in Troms and Finnmark County, 800 m above the fjord. The rockslide has an estimated volume of 6 Mm3, and moving at a rate of up to 50 mm a-1. Jettan is considered a “high risk object” within the Norwegian unstable mountain framework. This is due to the potential displacement wave impact to housings, infrastructure ... -
Environmental impact of sediment-hosted stratiform iron deposits: an on-land vs. submarine tailing simulation. A study of the stratiform iron mineralization in Dunderland Valley.
(Mastergradsoppgave; Master thesis, 2019-05-14)This thesis studies possible environmental impacts of tailings from the stratiform iron deposits. The study was conducted on selected mineralized samples from the Dunderland Valley, Nordland, simulating on-land and submarine tailing disposal conditions. The Dunderland Valley mineralization is hosted by Neoproterozoic (Tonian, 800-730 Ma) meta-sedimentary sequence of the Caledonian Uppermost ... -
Evaluering av automatiske snøskredvarslingsanlegg
(Master thesis; Mastergradsoppgave, 2017-12-01)Noen veger blir stengt på ubestemt tid på grunn av snøskredfare. Dette er frustrerende for trafikanter og det skaper økonomiske konsekvenser for næringslivet. Statens vegvesen (SVV) har testet ut to teknologier for å detektere og varsle snøskred i sanntid; doppler radar og geofoner. Radaren bruker radiobølger for å måle retning og avstand til et objekt og kan dermed benyttes til å bestemme om skredet ... -
Evolution of a rock slope failure at Skredkallen, Vannøya
(Master thesis; Mastergradsoppgave, 2019-11-15)Rock slope failures are known major contributors to landscape evolution in alpine Norway, and also pose a threat to people and infrastructure in the present day. By examining the history of rock slope failures at active rockslide sites an understanding of recurrence intervals and triggering mechanisms can be achieved. The focus of this study is to form a complete picture of the evolution of an area ... -
Experimental investigation on the fabric evolution and strain localization of quartz with and without the presence of muscovite
(Master thesis; Mastergradsoppgave, 2014-05-16)Deformation experiments of synthetic quartz–muscovite aggregates were performed to high shear strains at dislocation creep conditions in quartz. In previous studies, axial compression experiments were conducted on quartz aggregates to develop a better understanding of the relationship between flow strength and lattice preferred orientation with varying percentages of muscovite. Other analyses have ... -
Exploratory data analysis of flexural waves in Arctic fjord ice seismic data
(Master thesis; Mastergradsoppgave, 2017-05-14)A seismic source on floating ice induces flexural waves in the ice layer. An exploratory data analysis of Arctic fjord ice seismic data is performed for the purpose of identifying and studying characteristics of flexural waves and other related wave modes. Both geophone and hydrophone data are examined with the purpose of studying ice properties from ice wave behavior. Power spectral density estimates ... -
Faulting and the relationship to fluid migration and shallow gas accumulation in the Hammerfest Basin, SW Barents Sea
(Master thesis; Mastergradsoppgave, 2015-05-01)This thesis has focused its efforts to identify and map faults and their relationships to shallow gas accumulations and fluid flow features. The area of this investigation lies in the hydrocarbon-prone Hammerfest Basin in the southwestern Barents Sea, above the Base Cretaceous. Nine 3D seismic datasets were used in this study, aiming to improve the knowledge of the timing of the tectonic activity ... -
First-order estimation of in-place natural gas resources at the Nyegga gas hydrate prospect, mid-Norwegian Margin
(Master thesis; Mastergradsoppgave, 2009-12-07)Gas hydrates are solid compounds of a guest gas molecule (primarily methane) enclosed in a lattice of host water molecules, occurring under specific pressure-temperature conditions in both natural and manmade environments. In the past decade, gas hydrates are increasingly investigated as a potential new energy source. This thesis presents an integrated evaluation of the gas bound within the hydrate ... -
Fjellskred i Laksvatnfjellet, Balsfjord, Troms: indre struktur, morfologi og skredmekanismer
(Master thesis; Mastergradsoppgave, 2011-05)Forskning relatert til fjellskred har oftest fokusert på geomorfologiske fenomener og overflateprosesser, og i mindre grad den betydningen strukturen i berggrunnen kan ha for utrasning. Studiet av fjellskredet i Laksvatnfjellet er en kombinasjon av fagfeltene berggrunnsgeologi, strukturgeologi og geomorfologi. Til sammen har dette dannet grunnlaget for å kunne tolke blant annet skredmekanismer, ... -
Fjellskred i Nomedalstinden : en strukturstyrt masseutglidning på et underliggende storskala glideplan
(Master thesis; Mastergradsoppgave, 2011-06)En studie av et fjellskred klassifisert som en katastrofal masseutglidning på et underliggende glideplan. Fjellskredet befinner seg i Nomedalstinden på nordøstsiden av Kåfjorden i Troms fylke. Skredet har oppstått i planfolierte granatglimmergneiser i Kåfjordgruppen i Reisadekkekomplekset. Bergartene er gjennomsatt av et sprekkemønster med flere populasjoner av sprekker. Observasjoner gjort i felt ...
