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      Seismic transect across the Lomonosov and Mendeleev Ridges: Constraints on the geological evolution of the Amerasia Basin, Arctic Ocean

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      General Information:

      Citation:
      Jokat, W. , ickrath, M. and O'Connor, J. (2013): Seismic transect across the Lomonosov and Mendeleev Ridges: Constraints on the geological evolution of the Amerasia Basin, Arctic Ocean , Geophysical Research Letters, 40 (19), pp. 5047-5051 . doi: 10.1002/grl.50975
      Cite this page as:
      hdl:10013/epic.42581
      DOI:
      10.1002/grl.50975
      Official URL:
      http://onlinelibrary.wiley.com/doi/10.1002/grl.50975/abstract;jsessionid=9DBD93FE17810DACA3040A58EE116635.f04t01
      Contact Email:
      Wilfried.Jokat@awi.de
      Related Data:

      Platform/Expeditions:
      • ARK-XXIII/3
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      Jokat-2013-grl-LomoFracture.pdf

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      Cite this document as:
      hdl:10013/epic.42581.d001
      Abstract:

      We report on seismic and petrological data that provide new constraints on the geological evolution of the Amerasia Basin. A seismic reflection transect across theMakarov Basin, located between the Mendeleev and Lomonosov Ridges, shows a complete undisturbed sedimentary section of Mesozoic/Cenozoic age. In contrast to the Mendeleev Ridge, the margin of the Lomonosov Ridge is wide and shows horst and graben structures. We suggest that the Mendeleev Ridge is most likely volcanic in origin and support this finding with a 40Ar/39Ar isotopic age for a tholeiitic basalt sampled from the central Alpha/Mendeleev Ridge. Seismic reflection data for the Makarov Basin show no evidence of compressional features, consistent with the Lomonosov Ridge moving as a microplate in the Cenozoic. We propose that the Amerasia Basin moved as a single tectonic plate during the opening of the Eurasia Basin

      Further Details:

      Item Type:
      Article
      Authors:
      Jokat, Wilfried ; ickrath, Michele ; O'Connor, John
      Divisions:
      AWI Organizations > Geosciences > Geophysics
      Primary Division:
      Organizations > AWI Organizations > Geosciences > Geophysics
      Programs:
      Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 3: Lessons from the Past > WP 3.2: Tectonic, Climate and Biosphere Development from Greenhouse to Icehouse
      Primary Topic:
      Helmholtz Programs > Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 3: Lessons from the Past > WP 3.2: Tectonic, Climate and Biosphere Development from Greenhouse to Icehouse
      Eprint ID:
      34321
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