Geodynamic Models of the Vøring Volcanic Margin

T. Pedersen
Institute for Energy Technology, Kjeller, Norway

Volcanic margins are characterized by excessive magmatic activity. One of the most studied volcanic margins is the Vøring margin, offshore mid-Norway. The large volumes of magmatic rocks found there are believed to have been produced by the melting of an abnormally hot mantle.

We use COMSOL Multiphysics to investigate the hypothesis that the source of this thermal anomaly was a mantle plume. The Navier-Stokes equations for an incompressible fluid coupled with the heat equation are used to calculate the rise of the plume towards the surface.

Impinging on the Earth's rigid lithosphere, the plume spreads out laterally. We show that the plume may have generated a positive thermal anomaly in the Vøring margin area during continental extension.