Browsing Institutt for geofag by Title

Now showing items 1207-1226 of 2342

  • Mafic intrusions, hydrothermal venting and the basalt-sediment transition: Linking onshore and offshore examples from the north atlantic igneous province 
    Angkasa, Syahreza Saidina; Jerram, Dougal Alexander; Millett, John M; Svensen, Henrik; Planke, Sverre; Taylor, Ross A; Schofield, Nick; Howell, John (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    The emplacement of large intrusive complexes into sedimentary basins can have profound effects on host sedimentary rocks including deformation, thermal aureole metamorphic reactions, alteration of fluid-flow pathways, and ...
  • Magma-driven, high-grade metamorphism in the Sveconorwegian Province, southwest Norway, during the terminal stages of Fennoscandian Shield evolution 
    Slagstad, Trond; Roberts, Nick M.W.; Coint, Nolwenn.; Høy, Ingjerd Ulsaker; Sauer, Simone; Kirkland, CL; Marker, Mogens; Røhr, Torkil Sørlie; Henderson, Iain; Stormoen, Martin Austin; Skår, Øyvind; Sørensen, Bjørn Eske; Bybee, Grant M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Recently it has been argued that the Sveconorwegian orogeny in southwest Fennoscandia comprised a series of accretionary events between 1140 and 920 Ma, behind a long-lived, active continental margin characterized by ...
  • Magmatic development of the Jan Mayen - East Greenland area, NE Atlantic 
    Tan, Pingchuan (Doctoral thesis / Doktoravhandling, 2018)
    The study area is located north of Iceland in the Jan Mayen-East Greenland area, NE Atlantic. It has a number of magmatic productions. Magmatism in Iceland is related to a mantle plume bringing hot mantle up from deeper ...
  • Magma–Shale Interaction in Large Igneous Provinces: Implications for Climate Warming and Sulfide Genesis 
    Deegan, Frances M.; Bédard, Jean H.; Grasby, Stephen E.; Dewing, Keith; Geiger, Harri; Misiti, Valeria; Capriolo, Manfredo; Callegaro, Sara; Svensen, Henrik Hovland; Yachimchuk, Chris; Aradi, László E.; Freda, Carmela; Troll, Valentin R (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
    Large Igneous Provinces (LIPs) whose magma plumbing systems intersect sedimentary basins are linked to upheavals of Earth’s carbon and sulfur cycles and thus climate and life history. However, the underlying mechanistic ...
  • Magnetotelluric evidence for massive sulphide mineralization in intruded sediments of the outer Vøring Basin, mid-Norway 
    Corseri, Romain; Senger, Kim; Selway, Katherine; Abdelmalak, Mohamed Mansour; Planke, Sverre; Jerram, Dougal Alexander (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    A highly conductive body (0.1–0.8 Ω·m) is identified at mid-crustal depth (8–13 km) in the north Gjallar Ridge from magnetotelluric (MT) data and further investigated in light of other remote-sensing geophysical data ...
  • Magnetotelluric image of a hyper-extended and serpentinized rift system 
    Corseri, Romain; Planke, Sverre; Gelius, Leiv Jacob; Faleide, Jan Inge; Senger, Kim; Abdelmalak, Mohamed Mansour (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Magnetotelluric (MT) data can image the Earth's electrical resistivity down to the mantle but are rarely used for investigation of offshore rifted margins. In such settings, the lower crust and upper mantle are altered by ...
  • Magnetotelluric Investigations of Rifted Systems – Data Analysis, Inversion and Application to the SW Barents Sea 
    Corseri, Romain (Doctoral thesis / Doktoravhandling, 2024)
    The disturbance of the geomagnetic field by solar particles can help us see deep into the Earth’s interior. The way electrical current flows in geological layers often depends on the conductive properties of the fluid ...
  • The main pulse of the Siberian Traps expanded in size and composition 
    Augland, Lars Eivind; Ryabov, Viktor V.; Vernikovsky, Valery A.; Planke, Sverre; Polozov, Alexander; Callegaro, Sara; Jerram, Dougal Alexander; Svensen, Henrik (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Emplacement of large volumes of (sub)volcanic rocks during the main pulse of the Siberian Traps occurred within <1 m.y., coinciding with the end-Permian mass extinction. Volcanics from outside the main Siberian Traps, e.g. ...
  • Major influence of plume-ridge interaction, lithosphere thickness variations, and global mantle flow on hotspot volcanism - The example of Tristan 
    Gassmöller, René; Dannberg, Juliane; Bredow, Eva; Steinberger, Bernhard; Torsvik, Trond Helge (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    Hotspot tracks are thought to originate when mantle plumes impinge moving plates. However, many observed cases close to mid‐ocean ridges do not form a single age‐progressive line, but vary in width, are separated into ...
  • Malvinas (Falkland) Plateau structure versus Mjølnir crater: Templatefor marine impact craters. 
    Tsikalas, Filippos; Eldholm, Olav (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    A diagnostic geophysical-based template, supported by modelling, is suggested to be used prior to, or in combination with geological/drilling data, when proposing a marine impact crater. The latter refers to impacts occurring ...
  • Mantel- og skorpekomponenter i Drammensgranitten : En LAM-ICPMS Lu-Hf isotopstudie av zirkon 
    Haug, Lars Erik (Master thesis / Masteroppgave, 2007)
  • Manteldynamik und das Aufbrechen von Gondwana 
    Steinberger, Bernhard; Gassmöller, René; Trumbull, Robert; Weber, Michael; Sobolev, Stephan V. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    Southern Africa was part of Gondwanaland until the Mesozoic, when this supercontinent broke up into fragments that evolved into today’s southern continents. In particular, around 140 Ma, rifting started between southern ...
  • Mantle convection and possible mantle plumes beneath Antarctica – insights from geodynamic models and implications for topography 
    Bredow, Eva; Steinberger, Bernhard; Gassmöller, Rene; Dannberg, Juliane (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
    Abstract This chapter describes large-scale mantle flow structures beneath Antarctica as derived from global seismic tomography models of the present-day state. In combination with plate reconstructions, the time-dependent ...
  • Mantle flow influence on subduction evolution 
    Chertova, Mariya V.; Spakman, Wim; Steinberger, Bernhard (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    The impact of remotely forced mantle flow on regional subduction evolution is largely unexplored. Here we investigate this by means of 3D thermo-mechanical numerical modeling using a regional modeling domain. We start with ...
  • Mantle plumes and their role in Earth processes 
    Koppers, Anthony A.P.; Becker, Thorsten W.; Jackson, Matthew G.; Konrad, Kevin; Müller, Dietmar R.; Romanowicz, Barbara; Steinberger, Bernhard; Whittaker, Joanne M. (Journal article / Tidsskriftartikkel / SubmittedVersion, 2021)
    The existence of mantle plumes was first proposed in the 1970s to explain intra-plate, hotspot volcanism, yet owing to difficulties in resolving mantle upwellings with geophysical images and discrepancies in interpretations ...
  • Mantle resistance against Gibraltar slab dragging as a key cause of the Messinian Salinity Crisis 
    Capella, Walter; Spakman, Wim; Van Hinsbergen, Douwe; Chertova, Mariya V.; Krijgsman, Wout (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The Messinian Salinity Crisis (5.97–5.33 Ma) was caused by the closure of the Atlantic‐Mediterranean gateways that cut through the Gibraltar orogenic system. The geodynamic drivers underlying gateway closure and re‐opening ...
  • Mantle-Derived Fluids in the East Java Sedimentary Basin, Indonesia 
    Zaputlyaeva, Alexandra; Mazzini, Adriano; Caracausi, Antonio; Sciarra, Alessandra (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The Tertiary back‐arc sedimentary basin in East Java (Indonesia) hosts a large variety of piercement structures and hydrocarbon fields. Some of the latter (Wunut, Tanggulangin, Carat, Watudakon) are located a few kilometers ...
  • Mapping Area Changes of Glacial Lakes Using Stacks of Optical Satellite Images 
    Bazilova, Varvara; Kääb, Andreas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Glacial lakes are an important and dynamic component of terrestrial meltwater storage, responding to climate change and glacier retreat. Although there is evidence of rapid worldwide growth of glacial lakes, changes in ...
  • Mapping Flood Inundation Using Sentinel 1 and Sentinel 2 Data and the Google Earth Engine Cloud Processing Platform 
    Raunig, Mikael Stensen (Master thesis / Masteroppgave, 2023)
    The S1 (Sentinel 1) and S2 (Sentinel 2) missions use high-resolution satellite imagery to map the land surface over large swaths. With a minimum 5-day and 6-day repeat time, imagery over earths land can be quickly obtained ...
  • Mapping Glacier Basal Sliding Applying Machine Learning 
    Umlauft, Josefine; Johnson, Christopher W.; Roux, Philippe; Trugman, Daniel Taylor; Lecointre, Albanne; Walpersdorf, Andrea; Nanni, Ugo; Gimbert, Florent; Rouet-Leduc, Bertrand; Hulbert, Claudia; Lüdtke, Stefan; Marton, Sascha; Johnson, Paul A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract During the RESOLVE project (“High‐resolution imaging in subsurface geophysics: development of a multi‐instrument platform for interdisciplinary research”), continuous surface displacement and seismic array ...