Blar i tittel Mastergradsoppgaver i geologi

Viser treff 161-180 av 271

    • Palaeoceanographic and climate changes during the Holocene in Hinlopen Strait, northern Svalbard 

      Hosseini, Mehdi (Mastergradsoppgave; Master thesis, 2023-05-20)
      This study investigates the paleoceanographic changes in the Hinlopen Strait, situated between Spitsbergen and Nordaustlandet, through a multi-proxy analysis of sediment core HH15-1280-GC (439 m water depth). Located near the Polar Front, this region is highly sensitive to even minor alterations in the ocean circulation and climate, which can be reconstructed from marine sediment records. The core ...

    • Palaeoceanographic development in Leirdjupet Trough, western Barents Sea, during the Holocene: evidence from foraminiferal, isotopic and sedimentological records 

      Kovalenko, Boriss (Master thesis; Mastergradsoppgave, 2015-12-14)
      The gravity core HH14-012GC from Leirdjupet Trough has been investigated to detect changes in sedimentation and the variations in distribution patterns of marine microorganisms (Planktic and Benthic Foraminifera) and stable isotope values of their shells to reconstruct the variability of the inflow of Atlantic water to the study area. The results are compared to published paleodata records to ...

    • Paleo-klimatisk og oseanografisk utvikling i Ingøydjupet, gjennom deglasiasjon og Holosen, basert på undersøkelser av kornfordeling og bentiske foraminiferer 

      Skari, Øystein Aasen (Master thesis; Mastergradsoppgave, 2013-11-21)
      To kjerner fra Ingøydjupet i sørvest Barentshavet, 11HH-152MC og JM06-012GC, er blitt undersøkt for å undersøke den paleo-klimatiske og paleo oseanografiske utviklingen i Barentshavet. Dette er rekonstruert basert på undersøkelser av bentiske foraminiferer og kornfordeling. Kjernenes lengde er på henholdsvis ca 50 cm og 200 cm og 3 radiokarbon dateringer ligger til grunn for alderskronologien. ...

    • Paleoceanographic development during the last deglaciation and Holocene, over the Bear Island slide scar, SW Barents Sea 

      Danielsen, Ida Kristin (Master thesis; Mastergradsoppgave, 2017-02-02)
      The investigated sediment core HH13-243 GC is located under the present flow of the warm and saline Atlantic Water (AW), but close to, glaciated continental margins. The core site is situated in an area that is sensitive to changes and reflects the paleoceanography of the northernmost Norwegian Sea and the Western Barents Sea. We investigated the changes in inflow of Atlantic water and the ...

    • Paleoceanographic development in Leirdjupet, during the last deglaciation 

      Tønnessen, Lasse Aase (Master thesis; Mastergradsoppgave, 2016-08-23)
      The focus of this master thesis is to investigate the paleoenvironmental and paleoceanography during the last deglaciation in Leirdjupet, a small submarine trough in the southwestern Barents Sea. The lower half of the piston corer HH15-1303PC has been investigated for the distribution pattern of benthic foraminifera faunas, ice rafted debris (IRD), lithology and oxygen and carbon isotopes covering; ...

    • Paleoceanographic Development in Nordfjord, North East Greenland, During the Mid- and Late Holocene 

      Skjelvan, Bjørnar Liland (Master thesis; Mastergradsoppgave, 2017-05-15)
      Sediment core HH13-012GC-TUNU, retrieved from Nordfjord, North-East Greenland, has been investigated in order to reconstruct the paleoceanographic development during the mid- and late Holocene. Nordfjord is one of three tributary fjords to Kaiser Franz Joseph Fjord, and Waltershausen Gletcher is located at its head. The fjord system is largely influenced by the Eastern Greenland Current. Most of ...

    • Paleoenvironmental investigation of the northern flank of the Olga Basin (Barents Sea) during the Late Weichselian deglaciation 

      Patel, Jay (Master thesis; Mastergradsoppgave, 2018-06-11)
      Three gravity cores were collected from an unexplored site in the northern flank of the Olga Basin, Barents Sea. The lack of data from the central Barents Sea prompted this investigation and led to defining the evolution of the environment and ice sheet transitions over the Holocene. The three cores underwent benthic foraminiferal studies in combination with stable isotope analysis of (δ18O and δ ...

    • Past methane emissions in the earliest Pleistocene on Yermak Plateau, NW Svalbard. 

      Heimdal, Karianne (Master thesis; Mastergradsoppgave, 2016-05-15)
      Hole 912A (Ocean Drilling Program (ODP) Leg 151) drilled on the Yermak Plateau (eastern Arctic Ocean) is used to investigate past methane emissions in the earliest Pleistocene. Preliminary work showed depleted δ¹³C values at 93-96 meters below sea floor (mbsf), and an increase in methane concentration between 11, 5 and 23 mbsf. A secondary sampling focused on intervals between 10 and 23 mbsf (core ...

    • Petrogenesis and tectonic setting of the mafic-ultramafic rock association from NW Senja, West Troms Basement Complex 

      Priyatkina, Nadezda (Master thesis; Mastergradsoppgave, 2013-01-31)
      The studied mafic-ultramafic rock association occurs within Archean tonalitic gneisses and metasupracrustal suites of the Astridal belt belonging to the West Troms Basement Complex in the northwestern part of the Senja Island. The rock association appears in lens-shaped bodies, up to 200 m long, which are oriented conformal to the major metamorphic fabric of the host rock. The rock association is ...

    • Petrographic investigation of methane-derived authigenic carbonate crusts from Barents Sea and Norwegian Sea 

      Røde, Silje (Master thesis; Mastergradsoppgave, 2016-06-15)
      Methane-derived authigenic carbonate crusts from four seepage sites at the Loppa High in the southwestern Barents Sea, and one seepage site at Hola, off Vesterålen in the Norwegian Sea, have been investigated, with the main focus of understanding if and how the tests of benthic and planktonic foraminifera occurring in the crusts could serve as nucleation centers for the precipitated carbonates.

    • Petrography, geochemistry and genesis of the Skiftesmyr Cu-Zn VMS deposit, Grong, Norway 

      Walsh, Kristoffer Jøtne (Master thesis; Mastergradsoppgave, 2013-11-15)
      The Skiftesmyr Cu-Zn VMS-deposit is located in the Grong municipality of Northern Trøndelag, Norway. The mineralization has been known since at least 1903, when mention of small workings in the area were first published, and has later been the subject of several exploration projects by different companies, of which MetPro AS is the latest. The Skiftesmyr deposit is a part of the Gjersvik Nappe, ...

    • Petroleum systems of the Barents shelf. A regional well-based study of the mesozoic 

      Yankina, Anna (Master thesis; Mastergradsoppgave, 2017-06-30)
      The entire Barents Sea area has experienced a complex geological evolution. From orogenic processes connected to Caledonian mountain building in Palaeozoic to basin formation related to the opening of the Atlantic Ocean in Paleogene. Uplift and erosion processes (Exhumation) that fined place in Ceinozoic contribute to erosion and redepositing of thick sedimentary sequences over Barents Sea ...

    • Petrologi og alder av høymetamorfe mafiske bergarter i det vestlige gneiskomplekset i Troms 

      Gjerløw, Eirik (Master thesis; Mastergradsoppgave, 2008-11-15)
      Formålet med denne oppgaven er å gjøre petrologiske og petrografiske undersøkelser av en mafisk linse på Sandøya i vest-Troms for å rekonstruere metamorfe trykk og temperaturforhold, samt å gjøre dateringer for å utrede alderen på metamorfosen(e). Linsa ligge blottlagt ved havet ved Mjølvika på Sandøya. Kjernen er tilnærmet udeformert og består av en en massiv granatførende bergart med en grønn ...

    • Pinchout geometry of sheet-like sandstone beds: a new statistical approach to the problem of lateral bed thinning based on outcrop measurements 

      Janocko, Michal (Master thesis; Mastergradsoppgave, 2008-02-22)
      The pinch-out geometry of large sandbodies, such as fluvial or turbiditic palaeochannel margins and deltaic sand wedges, is of a crucial importance to the evaluation of many stratigraphic hydrocarbon traps and can generally be recognized in extensive outcrops or high-resolution seismic sections. Far more difficult to recognize and model are the digitate, feather-edge pinchouts of successions composed ...

    • Polymetamorphic evolution of nepheline normative rocks in the Skattøra migmatite complex, Tromsø, North Norway 

      Knutsen, Marianne Leinan (Master thesis; Mastergradsoppgave, 2012-06)
      The Skattøra migmatite complex (SMC) in the north Norwegian Caledonides is a slightly nepheline normative migmatitic meta-cumulate rock sequence, which experienced anatexis under water saturated conditions. In situ- and local crystallization of melt is reflected by leucosomes and the numerous anorthositic dykes net veining the rock complex. Studies of quartz-free rocks gives challenges for implying ...

    • Post-eklogitt deformasjon, mineralreaksjoner og metamorfose innen Tromsødekket 

      Damberg, Ane Johansen (Master thesis; Mastergradsoppgave, 2012-05)
      Den øverste alloktone enheten av de kaledonske skyvedekkene i Troms blir kalt Tromsødekket. I Tromsødekket opptrer det tallrike større og mindre kropper som består av bergarten eklogitt, og mafiske og ultramafiske bergarter, sammen med og i skifer, gneis og marmor. Tidligere arbeider har gitt indikasjoner på at de eklogittiske og ultramafiske bergartene har vært på svært store dyp (~100-120 km) med ...

    • Post-glacial sedimentary processes and slope instabilities off Nordnesfjellet, Lyngenfjorden, northern Norway 

      Hegstad, Sigrun Maret Kvendbø (Master thesis; Mastergradsoppgave, 2014-11-15)
      The Lyngen- and Storfjorden system, Troms County, northern Norway, is surrounded by an alpine landscape, partly with steep mountain sides. Parts of the ~700 m high mountain Nordnesfjellet, on the eastern side of the fjord, are currently moving downslope, and could in the event of sudden failure generate tsunami waves which would affect low-lying areas within a larger region. The main objective of ...

    • POST-PRECAMBRIAN MAGMATISM IN EASTERN FINNMARK, NORWAY: MANTLE SOURCES, POSSIBLE ORIGINS AND DIAMOND POTENTIAL 

      Eriksen, Glenn Martin Dagsvold (Master thesis; Mastergradsoppgave, 2013-12-15)
      Mantle sources under the Eastern Finnmark Region (EFR) appears to have inherited small scale heterogeneity from Precambrian geodynamics. Compositions varying from depleted and slightly enriched (similar to N-MORB and E-MORB), to enriched (similar to OIB type), are present in the EFR. Geochemical trends also indicates that some mantle sources has been to some extent influenced by subducting sediments, ...

    • Processing and interpretation of the Svyatogor 2016 high-resolution P-Cable 3D seismic dataset. Investigating the dynamics of a sub-seabed gas hydrate system with a potential abiotic methane source 

      Romeyn, Rowan (Master thesis; Mastergradsoppgave, 2017-06-01)
      A new high-resolution P-Cable 3D seismic dataset was acquired in July 2016 targeting a seafloor pockmark cluster at the northern end of Svyatogor Ridge, offshore west Svalbard. The processing and interpretation of this dataset formed the primary focus of this thesis. The seismic processing sequence was designed to enhance the signal-to-noise ratio of the data while preserving the useful signal ...

    • A Quantitative Analysis of Seasonal and Regional Forcing on the Terminus of Store Glacier, Greenland, from High Resolution Photogrammetry 

      Pearson, Hayden (Master thesis; Mastergradsoppgave, 2022-01-15)
      A quantitative analysis of seasonal and regional forcing on the terminus of Store Glacier, Greenland, from high resolution photogrammetry for the period between 10 May 2014 and 13 June 2014. Imagery is analyzed through ImGRAFT processing to create a detailed velocity and strain rate for the proglacial mélange and glacial terminus in order to investigate changes to glacial calving dynamics during ...