Mastergradsoppgaver i geologi: Nye registreringer
Viser treff 61-80 av 275
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Geochemical investigations of northern Norwegian fjord sediments - Sources and spatial variability of marine and terrigenous components
(Master thesis; Mastergradsoppgave, 2016-05-11)Fjords represent unique coastal marine environments with high sedimentation rates. They can be used for intensive investigations focusing on geochemical, mineralogical, biological, and sedimentological processes. In this study I investigate 42 surface sediment samples from the outer and inner parts of the Vestfjord, Ofotfjord, Tysfjord and tributary fjord arms in northern Norway. Samples were analysed ... -
Basin analysis and diagenetic investigations of Early and Middle Triassic sediments on Mariaholmen, Svalbard
(Master thesis; Mastergradsoppgave, 2016-05-09)Subsequent to a widespread hiatus at the top of the Permian on western Svalbard, the Triassic Vardebukta, Tvillingodden and Bravaisberget formations were deposited. In this thesis, the sedimentology, geochemistry and diagenesis are investigated to determine the depositional environment and basinal setting of the Triassic deposits. In the investigated profile on Mariaholmen, only the upper part ... -
Strukturell og kinematisk analyse av Skipsfjorddekket og underliggende bergarter i nordøstlige del av Vanna, Vest-Troms gneisregion
(Master thesis; Mastergradsoppgave, 2019-05-15)Vanna tilhører den nordøstlige delen av Vest-Troms gneisregion, og består av arkeiske til paleoproterozoiske bergarter, og deformasjonsstrukturer av antatt svekofennisk alder. Nordøst på Vanna er det nylig blitt avdekket en steiltstående kvartsfeltspatisk sekvens som tidligere er blitt kartlagt som en del av det sterkt folierte og delvis mylonittiserte Skipsfjorddekket. Denne studien har fokusert ... -
Cross-disciplinary investigation of gas seepage at Storbanken high and the Olga basin, The northern Barents Sea
(Master thesis; Mastergradsoppgave, 2019-05-15)The eastern parts of the northern Barents Sea is a little explored sector of the Barents Sea which currently is not open for petroleum activity. This thesis focuses on the processes and mechanisms controlling gas seepage activity in the Olga basin and Storbanken high. 2D seismic and bathymetric data has been correlated with water column acoustic data to identify gas bubbles in the water column and ... -
The Bigganjárgga Tillite re-visited: a stratigraphic and sedimentological study
(Master thesis; Mastergradsoppgave, 2019-05-15)The Neoproterozoic “tillite”-bearing sequences of the Smalfjord Formation in Varanger, northern Norway have retrieved considerable attention in geological literature since first described and discovered over a century ago. Much of the attention relates to the so-called Reusch’s Moraine also known as the Bigganjárgga Tillite, which rests directly on top of a striated sandstone surface pointing to ... -
Geometrisk og kinematisk analyse av duktile skjærsoner i metasedimentære og intrusive bergarter i Vannagruppen, Vest-Troms gneisregion, Troms, og deres relasjon til svekofenniske folde- og skyvestrukturer
(Master thesis; Mastergradsoppgave, 2019-05-15)Øya Vanna nordøst i Vest-Troms gneisregionen består av TTG-gneiser (2.8 Ga), 2.4 Ga mafiske intrusivganger, en overliggende metasedimentær enhet i sør kalt Vannagruppen intrudert av en dioritt (sill) datert til 2221 ± 3 Ma, og Skipsfjorddekket i nord, en allokton enhet skjøvet mot SØ. Studieområdet befinner seg sørøst på Vanna, i området Larstangen-Fakkekeila. Her opptrer metasedimentære bergarter ... -
Geometrisk og kinematisk analyse av paleoproterozoiske duktile skjærsoner i Skipsfjorddekkets undre del, Vanna, Vest-Troms gneisregionen, og relasjon til metasedimentære bergarter i Vannagruppen
(Master thesis; Mastergradsoppgave, 2019-05-13)Vannas geologi er unik, og strukturer av komplekse folde- og skyvebelter med antatt sensvekofennisk alder karakteriserer deformasjoner av neoarkeiske tonalittiske gneisbergarter (2,9-2,4 Ga), paleoproterozoiske metasedimentære og intrusive bergarter på øya, helt nord i Vest- Troms gneisregionen. Hovedhensikten med dette arbeidet har vært kartlegging og strukturell analyse av antatte metasedimentære ... -
Metamorphic evolution of the Passo Feio Complex (central part of the Dom Feliciano Belt, southern Brazil)
(Master thesis; Mastergradsoppgave, 2019-05-15)The Passo Feio Complex is considered as a part of the São Gabriel Terrane, located to the west of the Dom Feliciano Belt in the state of Rio Grande do Sul (Brazil), but shows numerous similarities with the easterly exposed Porongos Metamorphic Complex which is a part of the Schist Belt in that area. P-T phase equilibrium modelling of metamorphosed sedimentary rocks from the Passo Feio Complex was ... -
A structural, geomorphological and InSAR study of the unstable rock slopes at Mellomfjellet, Nordreisa
(Master thesis; Mastergradsoppgave, 2019-05-15)The focus of this study has been to combine structural data with morphological observations and displacement data to characterise the unstable rock slopes at Mellomfjellet. The site contains two instabilities (Mellomfjellet 1 and 2) and is located along a west-facing slope in Reisadalen, a glacially eroded valley, in Nordreisa, Troms. The bedrock consists mainly of Caledonian amphibolite and hornblende ... -
Strukturell kontroll av stratiform jernmalm ved Kvannevann øst, Dunderlandsdalen, Nordland
(Master thesis; Mastergradsoppgave, 2019-05-16)Stratiform jernmalm av verdensklasse fremgår i Dunderlandsdalen, der de prinsipielle malmmineralene består av hematitt og magnetitt. Jernmalmen tilhører Dunderlandsformasjonen, som er del av Ramnålidekket innenfor Rødingsfjell dekkekompleks i det øverste allokton av den kaledonske fjellkjeden. Sidebergartene til jernmalmen består av godt folierte glimmerskifere, metapsammitter og tykke lagpakker av ... -
3D-seismic interpretation of the glacial deposits in the outer Ingøydjupet area, SW Barents Sea. Ice sheet dynamics reconstructed from glacial landforms
(Master thesis; Mastergradsoppgave, 2019-05-15)The late Quaternary evolution of the outer Ingøydjupet area (SW Barents Sea) is studied using a merge of conventional 3D-seismic cubes and a new generation of high-resolution 3D-seismic (TopSeis). The glacigenic sequence is subdivided into five main seismic units: unit A1 (oldest) to A5. These are separated by six glacially eroded boundaries: the Upper Regional Unconformity (URU), intra-glacial ... -
Geochemistry of the stratiform iron Dunderlandsdalen deposits, Nordland
(Master thesis; Mastergradsoppgave, 2019-05-15)The Dunderlandsdalen iron district, Northern Norway, hosts a world-class stratiform Fe-mineralization (total tonnage of ~500 Mt at 33% Fe). The iron ore units belong to the Dunderland Formation in the Ramnålia Nappe, which further belongs to the Rødingsfjellet Nappe of the Caledonian Uppermost Allochthon. Hematite and magnetite represent the principal ore minerals and are hosted by amphibolite grade ... -
Late Weichselian and Holocene glacier dynamics and sedimentary processes in and north of the Wijdefjorden-Austfjorden fjord system, north Spitsbergen
(Master thesis; Mastergradsoppgave, 2019-05-16)Multi-proxy analyses (lithostratigraphy, physical properties, XRF core scanning, and grain size analysis) of five sediment cores and high resolution seismic (chirp) data were integrated to reconstruct the Late Weichselian and Holocene sedimentary environments and glacial history in and on the shelf north of Wijdefjorden. Three acoustic units (U1-U3) correlating with three lithostratigraphic units ... -
Seismic sequence analysis and petroleum system indicators at the Oligocene-Miocene level in the southern North Sea
(Master thesis; Mastergradsoppgave, 2019-05-14)A thorough review of the Oligocene-Miocene stratigraphic evolution and depositional environments in the Norwegian part of the southern North Sea is presented and considered alongside observations of petroleum system indicators, from seismic-, core- and well-data. The reconstructed paleo-environments show a trend of fluctuating eustatic sea-levels, controlled by basin subsidence and uplift of the ... -
Rockfall hazard assessment based on semi-automatic point cloud analysis from UAV data
(Master thesis; Mastergradsoppgave, 2018-12-29)Slettind in Flaktstad municipality, Lofoten in Nordland, has numerous rockfalls throughout the year. Rockfalls hit Fv 805 on a weekly basis, and it is estimated the most dangerous road in Nordland county. A rock avalanche hit the road winter 2017 closing it for 2 weeks, and isolating the small village Myrland. Statens Vegvesen consider to build a tunnel to protect the road but the failure mechanisms ... -
Tectono-metamorphic evolution of metasedimentary host rocks of ultramafic rocks in the Heidal/Sel Group, Trondheim Nappe Complex, Folldal: mineralogical and micro-textural changes during the Scandian thrusting
(Master thesis; Mastergradsoppgave, 2018-11-15)Abstract Several ultramafic outcrops are located along a specific tectono-stratigraphic unit in the Trondheim Nappe Complex, Central Scandinavian Caledonides. The relative timing and kinematics of these rocks are investigated by the use of structural, petrographical and mineralogical data from its host rocks. The metasedimentary host rocks are part of the Sel and Heidal Groups of the Røros and ... -
Geometry and kinematic evolution of ductile shear zones in the Ersfjord Granite (1.79 Ga), West Troms Basement Complex: A Svecofennian accretionary thrust system
(Master thesis; Mastergradsoppgave, 2018-11-26)The Ersfjord Granite is a 1.79 Ga felsic intrusion in the geological region of West Troms Basement Complex (WTBC). Its intrusion history and evolution relative to surrounding Neoarchean TTG-gneisses has until now been poorly understood, providing the basis for this thesis. The present study focuses on internal deformation structures in the granite, as well as the nearby Gråtind Migmatite, in order ... -
Climate controlled sedimentary processes in the Riiser Larsen Sea offshore Queen Maud Land, Antarctica
(Master thesis; Mastergradsoppgave, 2018-11-29)Multi-proxy analysis of gravity core PS56/029-1 have been performed in order to describe sedimentary processes and dynamics under pelagic, turbiditic and contouritic influences. The purpose is to reconstruct climate-controlled environmental change in the Riiser Larsen Sea, Antarctica, through past glacial/interglacial cycles. The gravity core was retrieved during expedition ANTARKTIS XVII/2 of R/V ... -
Terrenganalyse og 3D snøskredsimuleringer for plassering av radar for snøskredvarsling
(Master thesis; Mastergradsoppgave, 2018-10-09)Etter flere ulykker knyttet til snøskred på Europavei 8 i Lavangsdalen i Troms de siste årene, har Statens vegvesen gått inn for å bedre skredsikringen langs den 18 km lange dalen. Hovedformålet med denne masteroppgaven er å komme med innspill til hensiktsmessig plassering av automatiske overvåkningsanlegg for snøskred ved fire avgrensede strekninger langs vegen: Hestvollan, Sarasteinen, Stortinden ... -
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 ...