Blar i Bergen Open Research Archive på forfatter "Bjerga, Anders"

Viser treff 1-4 av 4

    • Evolution of talc- and carbonate-bearing alterations in ultramafic rocks on Leka (central Norway) 

      Bjerga, Anders (Master thesis, 2014-02-05)
      The thesis focuses on several low-angle fracture zones within the ultramafic section of the Leka Ophiolite Complex, central Norway, along which the original lithology has been completely serpentinized and carbonated. The ...

    • A Highly Depleted and Subduction-Modified Mantle Beneath the Slow-Spreading Mohns Ridge 

      Bjerga, Anders; Stubseid, Håvard Hallås; Pedersen, Leif-Erik Rydland; Beinlich, Andreas Michael; Pedersen, Rolf B. (Journal article; Peer reviewed, 2022)
      The Mohns Ridge is a very slow-spreading ridge that, together with the Knipovich Ridge, marks the boundary between the North American and Eurasian plates in the Norwegian-Greenland Sea. In this study, we report the major ...

    • Radiation damage allows identification of truly inherited zircon 

      Bjerga, Anders; Stubseid, Håvard Hallås; Pedersen, Leif-Erik Rydland; Pedersen, Rolf B. (Journal article; Peer reviewed, 2022)
      Many studies have reported U-Pb dates of zircon that are older than the igneous rocks that contain them, and they are therefore thought to be inherited from older rock complexes. Their presence has profound geodynamic ...

    • Volcanic evolution of an ultraslow-spreading ridge 

      Stubseid, Håvard Hallås; Bjerga, Anders; Haflidason, Haflidi; Pedersen, Leif-Erik Rydland; Pedersen, Rolf B. (Journal article; Peer reviewed, 2023)
      Nearly 30% of ocean crust forms at mid-ocean ridges where the spreading rate is less than 20 mm per year. According to the seafloor spreading paradigm, oceanic crust forms along a narrow axial zone and is transported away ...