3.5.6. Specific targets for far-field studies: the Scandinavia continental margin topography

 

Deep Earth processes:

  • What is the relationship between syn-rift crustal thinning and post-rift vertical movements? This appears to be much better understood in sedimentary basins (thermal subsidence, post-rift sedimentary load) than in the uplifted onshore areas (multiple models)
  • What are the roles played by flexure of the lithosphere in response to its erosional unloading and sedimentary loading, 'dynamic impingement' of mantle plumes and/or mantle upwelling, and intraplate compressional stresses on long wavelength uplift? Detailed tomographic images of sub-lithospheric mantle beneath the Norwegian margin and Scandes mountains are required to constrain structural and material contrasts
  • What is the relationship between inherited structures and post-rift vertical movements? Do contractional movements occur and are they localised on inherited structures?
  • Does active faulting contribute to uplift and subsidence during the post-rift phase?
  • What is the relationship between faulting and post-rift sediment transport patterns?
  • What is the role played by magmatism during rifting and margin evolution?
  • What is the relative contribution of mantle and crustal processes to topography development?

Surface processes:

  • What is the relationship between (tectonic) uplift, palaeic surfaces and landscape types? What are their ages?
  • How do erosion and uplift interact?
  • What are the mechanisms of relief development through fluvial and glacial erosion?
  • What are the ages, configuration and origin of the paleic surfaces?
  • What is the configuration and development of the pre-Quaternary fluvial landscape?
  • How does fluvial and glacial transport and deposition of erosion products to offshore areas occur?

Tasks in landform evolution:

  • Mapping and dating of terrestrial pre-Quaternary landforms and sediments to reconstruct the pre-glacial landscape
  • Mapping and dating of offshore erosion surfaces
  • Offshore 3D seismic interpretation to constrain transport and depositional processes and patterns
  • Chronological control and volume calculations of offshore sediments in an effort to establish a material balance between onshore erosion and offshore deposition
  • Age, genesis, uplift and lateral movement of the different paleic surfaces
  • Quantification of landform evolution and sediment fluxes to constrain Neogene uplift
  • Modelling of fluvial incision in response to uplift and climate change during pre-Quaternary landscape evolution
  • Modelling of glacial landscape development, including sub-glacial erosion on how glaciers exploit pre-existing topography