EGU22-6077
https://doi.org/10.5194/egusphere-egu22-6077
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Cenozoic relative movements of Greenland and North America by closure of the North Atlantic-Arctic plate circuit: The Labrador Sea, Davis Strait, Baffin Bay, and Eurekan Orogen

Annabel Causer1, Graeme Eagles2, Lucía Pérez-Díaz3, and Jürgen Adam1
Annabel Causer et al.
  • 1Royal Holloway, University of London, UK (annabel.causer.2017@live.rhul.ac.uk)
  • 2Alfred Wegener Institut, Helmholtz Zentrum für Polar und Meeresforschung
  • 3University of Oxford

Cretaceous to earliest Oligocene plate motions between Greenland and North America are only modellable at high resolution from a short-lived (61-42 Ma) sequence of magnetic isochrons in the Labrador Sea. Understanding them at other times is hampered by interpretational conflicts and low resolution in geoscientific observations of the Labrador Sea, Davis Strait, Baffin Bay, and Eurekan Orogen. To better contextualize these observations, we build and manipulate models of North America-Eurasia and Eurasia-Greenland divergence in order to depict post-84 Ma North American-Greenland motions at quantified high resolution. Among our findings, we show that the North American-Eurasian plate boundary propagated northwards, leading the continental shelves in the Labrador Sea to separate by 74-72 Ma and in Baffin Bay later, at around 63 Ma, and that field evidence for the Eurekan Orogeny having occurred in two distinct phases is directly related to a 46 Ma change in Greenland-North American plate motion parameters.

How to cite: Causer, A., Eagles, G., Pérez-Díaz, L., and Adam, J.: Cenozoic relative movements of Greenland and North America by closure of the North Atlantic-Arctic plate circuit: The Labrador Sea, Davis Strait, Baffin Bay, and Eurekan Orogen, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-6077, https://doi.org/10.5194/egusphere-egu22-6077, 2022.

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