Blar i utgivelsesdato Institutt for geovitenskap

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    • Occurence of free gas and focused fluid systems in the Veslemøy High area, SW Barents Sea 

      Pless, Gustav (Master thesis; Mastergradsoppgave, 2009-05-15)
      The high-resolution 3D seismic survey EL0001 allowed to document the subsurface fluid migration system and fluid accumulations within Veslemøy High, SW Barents Sea. Fluids migrate both through Cretaceous and Tertiary sediments, but also through younger glacial sediments. Veslemøy High is a structurally isolated high at the Cretaceous and Tertiary levels bounded by N-S trending west-dipping normal ...

    • Landskap og prosesser på Vesterålsbanken 

      Elvenes, Sigrid (Master thesis; Mastergradsoppgave, 2009-06-12)
      Oppgaven beskriver og tolker storskalalandskap og geomorfologiske formelementer og prosesser på Vesterålsbanken, som er en del av norsk kontinentalsokkel mellom 68 og 70°N. Svært detaljerte batymetri- og backscatterdata (dybde og akustisk reflektans) er behandlet i GIS (geografiske informasjonssystemer), og resultatene blir presentert i form av kart. Vesterålsbanken er et område som er preget ...

    • First-order estimation of in-place natural gas resources at the Nyegga gas hydrate prospect, mid-Norwegian Margin 

      Senger, Kim (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 ...

    • Norwegian margin outer shelf cracking: a consequence of climate-induced gas hydrate dissociation? 

      Vanneste, Maarten; Mienert, Jurgen; Haflidason, H; Bünz, Stefan (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)

    • Sediment transport on the Palos Verdes shelf, California 

      Ferré, Benedicte; Sherwood, Christopher R.; Wiberg, Patricia L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2010-02-01)
      Sediment transport and the potential for erosion or deposition have been investigated on the Palos Verdes (PV) and San Pedro shelves in southern California to help assess the fate of an effluent-affected deposit contaminated with DDT and PCBs. Bottom boundary layer measurements at two 60-m sites in spring 2004 were used to set model parameters and evaluate a one-dimensional (vertical) model of local, ...

    • Sen kenozoisk sedimentasjonsmiljø på kontinentalmarginen utenfor Troms 

      Rydningen, Tom Arne (Master thesis; Mastergradsoppgave, 2010-04-19)
      Batymetriske og seismiske data er analysert for å utrede den senkenozoiske utviklingen av kontinentalmarginen utenfor Troms. Prograderende kiler av glasigene avsetninger er identifisert nær munningen av de glasiale trauene Andfjorden og Malangsdjupet. En seismisk stratigrafi med to hovedenheter, S1 og S2, er definert. Enhet S2 viser hovedsakelig et prograderende mønster mot nordvest, mens S2 er ...

    • Geophysical investigation of faults and fractures in Upper-Palaeozoic carbonate build-ups at the Loppa High, SW Barents Sea 

      Kovacova, Tanya (Master thesis; Mastergradsoppgave, 2010-05)
      During previous studies of the Upper-Palaeozoic carbonate build-ups at the Loppa High in SW Barents Sea, a connection between locations of the build-ups and syn-depositional faults was observed. This thesis is studying this relationship in detail, applying the Ant-tracking semi-automated method for detection of faults. To my knowledge, this relatively new method has not been used in the Barents Sea ...

    • 3D seismic data indicate potential glide planes for submarine sliding : the mid-Norwegian margin Nyegga area. 

      Eilertsen, Håkon Andre (Master thesis; Mastergradsoppgave, 2010-05-15)
      The Nyegga study area of the thesis is located at the north-eastern escarpment of the Holocene giant Storegga Slide. It lies on the southern part of the Vøring plateau on the mid-Norwegian continental margin at approximately 700-1000m water depth. The area has been known to be prone for submarine sliding and is therefore an excellent location for studying morphological features to infer slide ...

    • 3D seismisk analyse av begravde rasavsetninger på den SV delen av Vøringmarginen 

      Johansen, Runar (Master thesis; Mastergradsoppgave, 2010-05-18)
      To 3D-seismiske datasett fra den sørvestlige delen av Vøringmarginen på midtnorsk kontinentalsokkel er blitt brukt til å analysere den øvre del av Naustformasjonen (~0,5-0,2 ma). En seismisk stratigrafi med fire hovedenheter er etablert (enhet 1-4). De to eldste enhetene (enhet 1 og 2) er dominert av glasiale debrisstrømmavsetninger dannet under glasiale maksima da det Fennoskandiske isdekket nådde ...

    • Sedimentær arkitektur og facies i lakustrine deltaavsetninger fra Weichsel i NV-Russland 

      Krogh, Hilde (Master thesis; Mastergradsoppgave, 2010-06-11)
      Sedimentologiske og stratigrafiske data er innsamlet fra et lakustrint deltakompleks på Tolokonka i NV-Russland. De innsamlede data fra et 4,2 km langt og 30 m høyt elvesnitt har bidratt til en bedre forståelse av glasiasjonshistorien og bredemte sjøer i NV-Russland gjennom weichsel. Basert på sedimentologiske og stratigrafiske data består faciesfordelingen av sandige facies, vekslinger av kryssjiktet ...

    • Norges grenser i dyphavet 

      Vorren, Tore Ola; Laberg, Jan Sverre (Chronicle; Kronikk, 2010-08-14)

    • Gamle olje- og gass-lekkasjer i Barentshavet 

      Vorren, Tore Ola; Laberg, Jan Sverre (Chronicle; Kronikk, 2010-08-28)

    • Geologi og klimaendringer 

      Andreassen, Karin (Conference object; Konferansebidrag, 2010-09-02)

    • Undersjøiske kjempeskred og flodbølger 

      Vorren, Tore Ola; Laberg, Jan Sverre (Chronicle; Kronikk, 2010-09-25)

    • Holocene relative sea-level changes and deglaciation chronology in Finnmark, northern Norway 

      Bennike, Ole; Romundset, Anders; Bondevik, Stein (Journal article; Tidsskriftartikkel, 2010-10)
      The outer coast of Finnmark in northern Norway is where the former Fennoscandian and Barents Sea ice sheets coalesced. This key area for isostatic modelling and deglaciation history of the ice sheets has abundant raised shorelines, but only a few existing radiocarbon dates relate to them. Here we present three Holocene sea-level curves based on radiocarbon ages from deposits in isolation basins ...

    • Undersjøiske daler og oljereservoar 

      Vorren, Tore Ola; Laberg, Jan Sverre (Chronicle; Kronikk, 2010-10-02)

    • Microstructural and metamoprhic study in rocks of the Seiland Igneous Province between Langfjord and Øksfjord, Alta kommune, Northern Norway 

      Rustad, Birgit Katrine (Master thesis; Mastergradsoppgave, 2010-11-22)
      The Seiland Igneous Province (SIP) is situated in western Finnmark, Northern Norway. The SIP comprises a suite of mainly gabbroic plutons, with ultramafic, syenitic and felsic intrusions. The origin of the region has been interpreted in different ways and several tectonic models have been proposed. Many different ideas have been suggested about the metamorphic, magmatic and deformation history. New ...

    • Environmental change in the Early Permian of NE Svalbard : from a warm-water carbonate platform (Gipshuken Formation) to a temperate, mixed siliciclastic-carbonate ramp (Kapp Starostin Formation) 

      Blomeier, Dierk; Dustira, Anna Marie; Forke, Holger; Scheibner, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      A detailed facies study of Early Permian strata within NE Svalbard reveals a fundamental change of the depositional setting, from a restricted-marine, warm-water carbonate platform to an open-marine, temperate-water, mixed siliciclastic-carbonate ramp. The uppermost strata of the Gipshuken Formation (Templet and Sørfonna members; Sakmarian–early Artinskian?) consist of microbialites (algal mats), ...

    • The effect of Dauphiné twinning on plastic strain in quartz 

      Menegon, Luca; Piazolo, Sandra; Pennacchioni, Giorgio (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      We present an electron backscatter diffraction analysis of five quartz porphyroclasts in a greenschist facies (T = 300–400°C) granitoid protomylonite from the Arolla unit of the NW Alps. Mechanical Dauphiné twinning developed pervasively during the incipient stage of deformation within two porphyroclasts oriented with a negative rhomb plane {z} almost orthogonal to the compression direction (z-twin ...

    • Dry and strong quartz during deformation of the lower crust in the presence of melt 

      Menegon, Luca; Nasipuri, Pritam; Stunitz, Holger; Behrens, Harald; Ravna, Erling J Krogh (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Granulite facies migmatitic gneisses from the Seiland Igneous Province (northern Norway) were deformed during deep crustal shearing in the presence of melt, which formed by dehydration melting of biotite. Partial melting and deformation occurred during the intrusion of large gabbroic plutons at the base of the lower crust at 570 to 520 Ma in an intracontinental rift setting. The migmatitic gneisses ...