Browsing Department of Earth Science by Title
Now showing items 259-278 of 883
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Generation of intermediate-depth earthquakes and the fate of subduction fluids : Insights from mantle wedge seismicity and case studies in the Western Hellenic subduction zone
(Doctoral thesis, 2019-06-07)The occurrence of intermediate depth earthquakes at 50-300 km depth in subduction zones is puzzling, because high temperatures and pressures at these depths do not allow standard brittle failure. Instead, two main candidate ... -
Genomes of Thaumarchaeota from deep sea sediments reveal specific adaptations of three independently evolved lineages
(Journal article; Peer reviewed, 2021)Marine sediments represent a vast habitat for complex microbiomes. Among these, ammonia oxidizing archaea (AOA) of the phylum Thaumarchaeota are one of the most common, yet little explored, inhabitants, which seem ... -
Geo-modelling of an exhumed reservoir cap rock succession, Utah, USA
(Master thesis, 2017-06-23)Carbon capture and storage (CCS) can potentially play an important role in mitigating global CO2 emissions. The storage sites must be understood in detail to ensure safe storage on a millennial time scale. Outcrop analogs ... -
Geo-modelling of paleokarst reservoirs - from cave-survey to geocellular paleokarst model
(Master thesis, 2016-11-20)Hydrocarbon reservoirs exhibiting features inherited from former karst processes acting on the reservoir rocks are relatively common worldwide. However, on the Norwegian continental shelf, paleokarst plays have only recently ... -
Geocellular rendering of cave surveys in paleokarst reservoir models
(Journal article; Peer reviewed, 2020)Infilled and collapsed cave systems are an important component of many paleokarst reservoirs. Incorporating these features into industrial reservoir models commonly relies on geostatistical modelling methods that often ... -
Geochemical and microtextural characteristics reflect the formation mechanics of laminated iron deposits at the Perle & Bruse and Troll Wall vent fields
(Master thesis, 2017-08-31)Located at the southern section of the Artic Mid-Ocean Ridge, the Jan Mayen Vent Fields (JMVF) consist of three main hydrothermal sites, the Troll Wall, Perle & Bruse and Soria Moria. These sites contain numerous Fe-deposits, ... -
Geochemical characteristics of the gold-bearing quartz veins in the Lykling area, Bømlo, SW Norway
(Master thesis, 2021-09-11) -
Geochemical characteristics of volcanogenic massive sulfide mineralizations on Bømlo and Stord islands, Sunnhordaland, SW Norway
(Master thesis, 2021-09-11)The results from the present study have brought forward new knowledge about geochemical, mineralogical, stable isotope and trace element data for volcanogenic massive sulfide deposits hosted within Early Ordovician Ophiolitic ... -
Geochemical characterization of ophiolites in the Alpine-Himalayan Orogenic Belt: Magmatically and tectonically diverse evolution of the Mesozoic Neotethyan oceanic crust
(Journal article; Peer reviewed, 2020)Ophiolites are important archives of oceanic crust development and preservation in the rock record, and the Alpine-Himalayan Orogenic Belt (AHOB) is one of the most comprehensive ophiolite depositories in earth’s history. ... -
Geochemical characterization of the Gnitahei seafloor massive sulfide deposit, Arctic Mid-Ocean Ridge
(Master thesis, 2022-06-29) -
Geochemistry of hydrothermal fluids from the E2-segment of the East Scotia Ridge: Magmatic input, reaction zone processes, fluid mixing regimes and bioenergetic landscapes
(Journal article; Peer reviewed, 2022)The compositions of hydrothermal fluids in back-arc basins (BABs) can be affected by the influx of magmatic fluids into systems that are dominated by reactions between basement rocks and seawater-derived fluids. The East ... -
Geochemistry of lava samples collected near the oceanic detachments at 13°N along the Mid-Atlantic Ridge
(Master thesis, 2017-09-25)The structure and composition of the oceanic lithosphere is mainly controled by the supply of magmatic melts to the ridge axis. At slow-spreading, mid-oceanic ridges are characterized by complex spreading styles, where ... -
Geochronology and tectonic setting of voluminous granitoids and related rocks and associated extensional structures in Dronning Maud Land (East Antarctica)
(Master thesis, 2011-06-15)The history of the tectonic evolution in central Dronning Maud Land (cDML), East Antarctica can be inferred from various zircon grains for U-Pb zircon age determination with the Laser-Ablation Inductively-Coupled-Plasma ... -
Geofaglig vurdering av konsekvenser ved klimaframskrivinger for verdensarvområdet Vestnorsk fjordlandskap, delområde Geirangerfjorden
(Master thesis, 2022-06-01)I Møre og Romsdal er det forventet en økning i temperatur og nedbør frem mot perioden 2071-2100. Dette inkluderer en økning i årlig middeltemperatur på ca. 3,5-4,0 ºC og en økning i årsnedbør på 15%. Økningen vil føre til ... -
Geofysiske og sedimentologiske undersøkelser av israndavsetningene fremfor Esmarkmorenen, Rogaland
(Master thesis, 2016-09-01)Det første geologiske arbeidet som ble gjort i Forsand ble gjort av Jens Esmark på 1800- tallet, da han beskrev det vi i dag kaller Esmarkmorenen/Vassryggen og sletteområdet foran. Han konkluderte med at dette var ... -
Geological constraints on hydrocarbon contacts in the greater Norne area
(Master thesis, 2018-06-13)The understanding of the geological constraints on the position of fluid contacts is important for the evaluation of the remaining resources on the Norwegian Continental Shelf. Different mechanisms can lead to filled, ... -
Geological contraints on the position of hydrocarbon-contacts in the Gina Krog and Sleipner East areas
(Master thesis, 2018-08-22)Knowledge of the geological constrains on the position of hydrocarbon-water contacts are crucial in terms of hydrocarbon exploration. The controlling mechanisms have a large impact on the in-place volumes in a potential ... -
Geological control on dinosaurs’ rise to dominance: Late Triassic ecosystem stress by relative sea level change
(Journal article; Peer reviewed, 2020)The Late Triassic is enigmatic in terms of how terrestrial life evolved: it was the time when new groups arose, such as dinosaurs, lizards, crocodiles and mammals. Also, it witnessed a prolonged period of extinctions, ... -
Geological controls on fluid flow and seepage in western Svalbard fjords, Norway. An integrated marine acoustic study
(Doctoral thesis, 2015-11-06)The study of seabed fluid flow facilitates assessment of gas hydrate accumulation, submarine geohazards, localizing shallow and deep hydrocarbon reservoirs. Other fluid flow related studies include for example the benthic ... -
Geological evolution and stratigraphic relationships of the ophiolitic terrane in the outer Hardangerfjord area: evidence from geochronology and geochemistry
(Master thesis, 2017-10-13)Field relations, geochemistry and U-Pb single zircon ages have provided new information about the rocks of the outer Hardangerfjord area that represent a part of the Upper Ordovician ophiolitic terrane of south-western ...