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norskBlar i tittel Mastergradsoppgaver i geologi
Viser treff 42-61 av 271
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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 ... -
Fjellskred ved Indre Nordnes, Nordnesfjellet, Lyngen, Troms - Berggrunnens indre struktur og bevegelsesmekanismer basert på strukturell analyse og overvakingsdata
(Master thesis; Mastergradsoppgave, 2014-05-16)Gravitasjonell reaktivering av pre-eksisterande kaledonske duktile svakheitsoner i tillegg til post-kaledonske sprø strukturar som truleg har vorte utløyst ved glasial avlasting like etter nedsmeltinga av isen under siste istid har truleg gitt opphav til skråningsdeformasjonen og utviklinga av det ustabile fjellpartiet Indre Nordnes. Skredområde Indre Nordnes er initierande tektonisk styrt der ... -
Fluid flow and faulting along the northern margin of the Loppa High
(Master thesis; Mastergradsoppgave, 2020-05-15)The Barents Sea is a large epicontinental sea and petroliferous basin, which is fairly unexplored compared to other regions of the Norwegian Continental Shelf (NCS). The structural configuration of the SW Barents Sea is characterized by a complex mosaic of structural highs, platforms and basins, reflecting the interplay between multiple tectonic phases. Late Cenozoic glacially induced subsidence and ... -
Fluid flow features along the Bjørnøyrenna Fault Complex west of West Loppa High, SW Barents Sea
(Master thesis; Mastergradsoppgave, 2011-11-15)This master thesis contributes to better understand the occurrence and development of giant to medium scale vertical fluid flow structures in the area west of the Loppa High at the Bear Island Fault Complex (BIFC). The study area lies in the SW-Barents Sea and the study was based on the interpretation of a 3D seismic cube “West Loppa 2008”. Fluid emissions features and accumulation area visualized ... -
Fluid-flow expressions at Vestnesa Ridge of the NW -Svalbard Margin
(Master thesis; Mastergradsoppgave, 2008-11-15)The Vestnesa Ridge is a 100 km long and ≈3 km wide sediment drift NW of the Svalbard Margin deposited on young oceanic crust. The crest of the Vestnesa Ridge is pierced by 133 pockmarks, where the orientation and elongation is controlled mainly by processes such as positioning of faulting, creeping of sediments or similar down-slope processes. High resolution single seismic reflection data together ... -
Fluidmigrasjon og akkumulasjon på Loppahøyden i sørvestlige deler av Barentshavet
(Master thesis; Mastergradsoppgave, 2011-05)Mulig bevis for vertikal migrasjon av fluider gjennom forkastninger i sørvestlige deler av Barentshavet eksisterer i form av akustisk maskerte områder, tegn til akkumulasjoner og pockmarks. Alle områder med vertikal akustisk maskering forekommer i sammenheng med forkastninger som foreslås å fungere som strømningsveier for fluidene. Maskeringen er funnet i et intervall fra 570 ms TWT til 1590 ms TWT ... -
Fractured carbonates in the Mediumfjellet thrust-stack in the Tertiary fold-and-thrust belt of Spitsbergen
(Master thesis; Mastergradsoppgave, 2009-01-15)This thesis describes a study that was carried out in the Tertiary fold-and-thrust belt of Svalbard, in the mountain range of Mediumfjellet summer 2007 and 2008. The focuses were on: i) further describing the larger structures of the Mediumfjellet, ii) analyze the fracture distribution in the limestone beds associated with the major structures in the area. Available data sets are based on photo ... -
Gas migration and sealing modelling in the Haapet Dome area, Norwegian Barents Sea - analysis of seismic anomalies and water column data
(Master thesis; Mastergradsoppgave, 2020-05-15)Seismic interpretation, water column data, and well information have enabled a thorough review of shallow amplitude anomalies and subsurface faulting, in conjunction with possible migration pathways in the Haapet Dome area. The processed water column data from the MAREANO-program was presented and evaluated in accordance with potential gas leakage from the seafloor. Water column imaging illustrates ...
