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S.B. Nielsen

New interpretations based on seismic and modelled well data and their implications for the tectonic evolution of the west Greenland continental margin

Research output: Contribution to conferenceConference abstract for conferenceResearch

  • E.D. Mcgregor, Department of Earth Science, Aarhus University, Denmark
  • S.B. Nielsen
  • R.A. Stephenson, Denmark
  • O.R. Clausen
  • K.D. Petersen, Denmark
  • D.I.M. Macdonald, School of Geosciences, Geology and Petroleum Geology, Meston Building, King's College, University of Aberdeen, Scotland., United Kingdom
  • Department of Earth Sciences
Davis Strait is situated between Baffin Island and Greenland and forms part of a sedimentary basin system, linking Labrador Sea and Baffin Bay, developed during Cretaceous and Palaeocene rifting that culminated in a brief period of sea-floor spreading in the late Palaeocene and Eocene. Seismic reflection profiles and exploration wells along the Greenland margin of Davis Strait have been analysed in order to elucidate uplift events affecting sedimentary basin development during the Cenozoic with a focus on postulated Neogene (tectonic) uplift affecting the west Greenland continental margin on and offshore. Subsidence and thermal history has been modelled in four offshore wells, constrained by borehole temperatures and vitrinite reflectance. Offshore reflection profiles have been newly interpreted and show the presence of unconformities at the base mid-Eocene (roughly) and base Quaternary. The investigated offshore wells penetrate these two unconformities. It has been argued from published interpretations of fission track data and inferred episodes of cooling that onshore topography was created by Neogene uplift. However, all five wells can be satisfactorily modelled without invoking any Neogene tectonic event. An interpretation in which the inferred onshore cooling is related to erosion of pre-existing topography is more consistent with our new results from the offshore region. These results will have important implications for other continental margins developed throughout the Atlantic-Arctic rift system.
Original languageEnglish
Publication year13 Dec 2010
Number of pages1
Publication statusPublished - 13 Dec 2010
EventAGU Fall Meeting 2010 - San Francisco, Calif., United States
Duration: 13 Dec 201017 Dec 2010

Conference

ConferenceAGU Fall Meeting 2010
CountryUnited States
CitySan Francisco, Calif.
Period13/12/201017/12/2010

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