The Arctic connection: A tale of Greenland and Ellesmere islands

Category Tectonic & Seismotectonic
Group GSI.IR
Location International Geological Congress,oslo 2008
Author Torsvik, Trond H.۱; Alvey, Andy۲; Gaina, Carmen۱; Kusznir , Nick۲
Holding Date 08 September 2008

Although the oceanic basins are relatively well mapped, there is a need for revised, quantitative reconstructions of relative plate motions in many regions, including the Labrador Sea and Baffin Bay between North America and Greenland, and the neighbouring Arctic areas. The pre-drift and the opening history of the Labrador Sea is disputed as are the plate boundaries between this basin and the Arctic ocean. Prior to the opening of the Labrador Sea most reconstructions show Greenland separated from Ellesmere by several hundred kilometers of oblique displacement that apparently violate the well-ordered and un-deformed Precambrian and Palaeozoic provinces of Canada and Greenland along the Nares Strait. We attempt to construct kinematic models for the Late Cretaceous-Tertiary of Greenland and adjacent areas that account for solid geological observations based on detailed interpretation of continent-ocean-boundaries, magnetics, seismics, gravity inversion (crustal thickness), palaeomagnetic data and the principles of plate tectonics.