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norskMastergradsoppgaver i geologi: Nye registreringer
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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 ... -
Climate reconstruction during the Last Glacial Maximum based on a marine sediment core from Vestnesa Ridge, Svalbard
(Master thesis; Mastergradsoppgave, 2018-07-14)The sediment core HH15-1255PC has been analyzed to reconstruct the climate in the Fram Strait during the last 45,000 years. The coring site is located west of Svalbard on the Vestnesa Ridge, a contourite drift with a high-resolution sedimentary record (Plaza-Faverola et al., 2015). This ridge also includes a pockmark field formed by methane seepage (Vogt et al., 1994). The core HH15-1255PC is a ... -
Paleoenvironmental investigation of the northern flank of the Olga Basin (Barents Sea) during the Late Weichselian deglaciation
(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 ... -
The regional Cretaceous development of the southeastern part of the Norwegian Barents Sea- from seismic interpretation
(Master thesis; Mastergradsoppgave, 2018-05-15)This study sheds new light on the regional Cretaceous development of the southeastern part of the Norwegian Barents Sea. The study area is in the former disputed area between Norway and Russia, which after the agreement on the new borders in 2010 was opened to petroleum activity in 2013. Consequently, the southeastern Barents Sea is still a frontier area with less scientific knowledge, compared to ... -
Geofaglig kunnskap og holdninger til norsk petroleumsnæring. En casestudie av Alta/Gohta
(Master thesis; Mastergradsoppgave, 2018-05-15)Denne oppgaven har som hovedfokus å belyse holdninger og geofaglig kunnskap knyttet til norsk petroleumsnæring. Oppgaven tar utgangspunkt i olje- og gassfunnene Alta/Gohta i Barentshavet. Et geofaglig litteraturstudie har blitt gjennomført for å oppnå en forståelse av funnenes geologi og særegenheter. Intervjuer med norsk petroleumsnærings hovedaktører; olje- og energidepartementet, oljedirektoratet, ... -
Triassic Channel Systems on the northern Loppa High, SW Barents Sea
(Master thesis; Mastergradsoppgave, 2018-06-07)During the Triassic, the Barents Sea Basin was filled with sediments from the Uralian and Caledonian mountain belts. High sediment yield and large river systems made progradation possible, resulting in an alluvial to deltaic plain stretching from the mountain belts in the south east to Spitsbergen in the north.This thesis focuses on the northwestern part of the Loppa High area, SW Barents Sea. The ... -
The regional upper Paleozoic development of the SE part of the Norwegian Barents Sea - from seismic interpretation
(Master thesis; Mastergradsoppgave, 2018-05-15)This thesis focuses on the Barents Sea South East (BSSE), and the overall goal has been to investigate the regional upper Paleozoic development in the SE part of the Barents Sea. After more than four decades of negotiation between Norway and Russia, a delineation agreement came in effect in 2011. Today, the area known as BSSE is opened up for petroleum operations. As part of the opening of the BSSE, ... -
Ore petrography and fluid evolution in the Cu-(Zn) VMS deposits at Sulitjelma, Northern Norway
(Master thesis; Mastergradsoppgave, 2018-05-29)The Sulitjelma deposits, Nordland, Northern Norway, with more than 20 Zn-Cu ore bodies (total tonnage excesses 35 Mt of ore at 1.84 % Cu, 0.86 % Zn, 10 g/t Ag and 0.25 g/t Au) have been described as a classic example of the Zn-Cu volcanogenic massive sulfide (VMS) mineralization. The mineralization is spatially associated with metamorphosed mafic rocks of Ordovician age. Both, ore bodies and their ... -
The origin of quartz-carbonate veins hosted by ductile shear zones of the Astridal Supracrustal Belt, West-Troms Basement Complex.
(Master thesis; Mastergradsoppgave, 2018-05-29)An approximately 1 meter wide NE-SW-oriented mylonitic shear zone hosts hydrothermally precipitated quartz and carbonate veins. The shear zone mainly consists of a secondary mylonitic fabric enriched in chlorite. A similar mylonitic shear zone striking NE-SW, oriented parallel to the axial plane of a F3-fold, consists of the same secondary mylonitic chloritized fabric and are therefore assumingly ... -
Comparison of 3D and 2D rockfall models. Considering terrain model quality effect on respective model performances
(Master thesis; Mastergradsoppgave, 2018-05-15)Rockfalls are blocks of rock that bounce and roll down slopes. They are commonly detached from rock-slopes with inclinations over 40-45°. They embody high energy and mobility and are a major cause of landslide related deaths. Rockfalls can be simulated using empirical relationships and modelling, of which 2D and 3D variants exist for the latter. 3D models allow for rock fragment- and surface shape ...
